CN109312430A - The acieral containing magnesium for thin-section casting - Google Patents
The acieral containing magnesium for thin-section casting Download PDFInfo
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- CN109312430A CN109312430A CN201680086607.3A CN201680086607A CN109312430A CN 109312430 A CN109312430 A CN 109312430A CN 201680086607 A CN201680086607 A CN 201680086607A CN 109312430 A CN109312430 A CN 109312430A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D21/00—Casting non-ferrous metals or metallic compounds so far as their metallurgical properties are of importance for the casting procedure; Selection of compositions therefor
- B22D21/002—Castings of light metals
- B22D21/007—Castings of light metals with low melting point, e.g. Al 659 degrees C, Mg 650 degrees C
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- Crystallography & Structural Chemistry (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Body Structure For Vehicles (AREA)
Abstract
A kind of aluminium-magnesium alloy is disclosed, the excellent properties for casting in punching block are provided and is used to form the good ductility of the casting of the complicated shape including thin-walled portion.The acieral contains the iron of the meter of % by weight about 2-15% magnesium, 0.2 to 3% silicon, 0.05 to 0.5% chromium, 0.05 to 0.5% manganese, 0.05 to 0.2% titanium and minimum content.Under its molten condition, can in high pressure die casting program by this aluminium-magnesium-evanohm be pushed into iron-based mold die cavity and its follow the die surface of the complicated shape with thin cavity segment and the iron of insoluble significant quantity or on the mold surface occur mold soldering.Gained casting shows good intensity and ductility and can be further enhanced after solution heat treatment by artificial ageing process.
Description
Technical field
Acieral containing 2 to 15 weight % magnesium, 0.2 to 3 weight % silicon and a small amount of chromium, manganese and titanium can be used for thin-wall product
Such as the high pressure die casting of automotive body structure casting.The alloy provides the good combination of intensity and ductility and is resistant to and processing, such as
Dissolved ferric iron in the pressure injection casting process of product is to prevent mold soldering (die-soldering).
Background of invention
On May 31st, 2016 issue and transfer entitled " the Integration of One Piece of assignee of the present invention
It includes whole anti-that the United States Patent (USP) 9,352,388 of Door Inner Panel with Impact Beam ", which is described for manufacturing,
Hit the casting die of the internal hilar plate of the automobile side-door of beam.The co-inventor of the patent includes co-inventor of the invention.‘388
Patent reflects the needs that light-duty product is manufactured using light metal alloys and polymer.
But, it is still desirable to offer is used to form thin wall product, body structure casting and other thin-walled portions such as automobile
The high-strength tensile alloy and mass production method of (at most about 2 to 5 millimeters of thickness) product.Such as forming vehicle structure
Various acierals are had been contemplated that and used in the application of casting, such as damping tower etc.But the complicated shape of cast structure
It is required that limiting complex three-dimensional die cavity using punching block to receive the molten aluminum matrix alloy of admission space and adopt as heir (assumes) in alloy
The significant pressure on alloy is remained applied to when the shape on complicated mold cavity surface and solidification.
Molten aluminium alloy tends to from die surface dissolved iron, this changes the composition of the alloy and significantly reduces the mold longevity
Life.In addition, the iron being dissolved in new moulded products negatively affects its ductility in desired use.
Therefore, there is still a need for improving the composition of acieral and without high-performance as the formation of processing problems or dispute
The method of casting thin-wall product.
Summary of the invention
A kind of aluminium based casting alloy containing magnesium with excellent Castability, intensity and ductility is provided.It is particularly useful for making
Make the thin-section casting with the two-dimensional shapes extended.For example, the alloy can be used for repeating manufacturing to have about 3 millimeters or lower
The casting that sizable surface region of thickness is characterized.In the body panel of automobile and the example of body structure, complex shape
The component of shape usually has 50 centimetres to 150 centimetres of length and width size, but there was only several millimeters in sizable region
Thickness.
In order to which such casting to be repeated to be shaped to the solid cast shape with strict regulations size, under suitable pressure
The melt loading of aluminium alloy is injected by the opposite mould structure for closing complementary punching block component or other ferrous alloy compositions
In the die cavity or type chamber (or chamber) that part limits.The die cavity is heated to certain temperature range with adapt to molten aluminium alloy and solidify and
Cast shape needed for being formed.The aluminium based casting alloy must be heated to make the temperature of its suitable fluid molten condition, so
Plenum ventilation die cavity is so that liquid aluminum alloy is fully filled with each thin-walled portion of die cavity and adoption is limited by each surface of die cavity afterwards
Shape.The molten alloy never with the surface chemical reaction of iron class or adherency or soldering to its.Then punching block is cooling to solidify
Aluminium alloy shape and group of the hot solid cast shape without significantly changing the alloy or cavity surface must be removed from die cavity
At.Acieral composition of the present invention has been designed to repeat to realize that casting process lays equal stress on to replicate and make with required physical property
Complicated shape cast product.
The composition (in terms of weight %) of the acieral be 2 to 15% magnesium, 0.2 to 3% silicon, 0.05 to 0.5% chromium, 0.05 to
0.5% manganese, 0.05 to 0.2% titanium, less than 0.2% iron, other metallic elements less than 0.5% and surplus be substantially aluminium.Such alloy
Slab 250 MPa and higher tensile yield strength values, 15% and more are shown at as cast condition (as-cast condition)
The ultimate strength value of high break-draw general extension value and 280 MPa.The heat treatment for being not usually required to new mould casting just obtains
Such property.But it is if necessary or necessary, can pass through further precipitation-hardening processing step enhances cast product
Property.The melt offer of these alloy composites is good to be may be cast as property and can be used to form thin-section casting and the casting of medium wall
Part.
Preferably constituting for the alloy be, by weight, 5.0 to 9.0% magnesium, 0.25 to 0.35% chromium, 0.15 to 0.35% manganese,
1.0 to 3.0% silicon, 0.05 to 0.15% titanium, less than 0.15% iron, less than 0.01% bronze medal, less than 0.003% phosphorus, less than 0.03% strontium and
Surplus is substantially aluminium.Magnesium provides the solution strengthening of the alloy.The micro-structure of chromium and manganese content enhancing casting alloy is simultaneously found
The solubility of iron in the alloy is effectively reduced, reduces the reactivity and undesirable mold soldering of molten alloy and mold.Limit
The iron content of the alloy is made to avoid the intermetallic phase of the ductility of cast article is reduced.The presence of titanium serve as grain refiner with
It improves the Castability of cast article and ductility and mitigates the fire check in cast article and formed.Silicone content formation helps to cast
Make the Mg of the lamellar morphology of the ductility of product2Si eutectic phase.
The acieral of the present invention for being found to have its chromium content prevents dissolved ferric iron and the soldering of mold, and in high pressure die casting and
Mobility is kept in pressure casting process and similar compression casting technique, is produced with forming the casting aluminium-magnesium alloy of complicated shape
Product simultaneously have thin-walled portion in casting.The cast article of the present composition shows the combination of good strength and ductility.
They also provide for the good corrosion resistance in wet and marine environment.For cosmetic purposes, the surface of gained casting is easy essence
Whole or polishing.
As an example, acieral of the present invention containing magnesium can be used for compression casting step, if high pressure die casting is to manufacture
The casting of complicated shape, such as body of a motor car damping tower (for accommodating damper).Damping tower is that have deep rib shape (deep-rib)
The additional channel carrying shape of structural member.But practice of the invention is not limited to manufacture damping tower.Alloy of the present invention can be used for manufacturing other be used for
The complicated shape product with whole thin structure part of vehicle application and non-vehicle application.
In the molding of such high-performance thin-wall construction casting, alloy of the present invention can be used for high pressure die casting step.The die casting
Step can by by predetermined volume the present invention melting aluminium-magnesium alloy about 670 DEG C to 730 DEG C at a temperature of indentation by carrying
The heating die cavity that separable, opposite, complementary die component in suitable pressure structure limits carries out, to form cast shape.
Preferably, die component is in the case where liquid metals loads and is maintained at 180 DEG C to 230 DEG C of predetermined temperature in step.When molten alloy exists
In die cavity when cooling and solidification, scheduled reinforcing pressure is kept on molten alloy.It, can also according to the complexity and thinness of casting
Desirably to use squeeze pin in casting device so that the local contraction of cast aluminium alloy gold is minimized or eliminated.Since air is stagnant
Staying leads to that hole may be formed in casting metal, it also may be preferable for removes air using vacuum/valve system and eliminates thin-walled knot
Hole in structure casting.
After solidifying by structural casting and being cooled to mold temperature, it is released from mold.In numerous applications, this is thin
Physics and metallurgical property needed for wall as-cast structure has its intended application.Any finishing simply can be imposed to the cast structure
Processing (being such as machined) casts runner to remove, and assembles or be used together with other ready components.
If the performance or property of casting must be further enhanced, it can be imposed heat treatment step (by it from mold
After middle taking-up) to promote the dissolution of separation phase and then by following suitable artificial ageing process precipitation-hardening.It will be of the invention
As-cast structure shape heating (suitably in air) to about 480 DEG C to about 540 DEG C of temperature 2 to 6 of acieral is small
When predetermined time with the suitable dissolution of at least some of micro-structure for obtaining cast product separation phase and realize more evenly
The solid microstructure of composition and solutionizing.Then the die casting shape of heating is quickly cooled to about 50 using water or compressed air
DEG C to 70 DEG C (preferably shorter than 100 DEG C) with by the micro-structure of solutionizing quench.After such cooling, by the cast member pre-
It is located in 180 DEG C to 250 DEG C of furnace and reheats 3 to 8 hours predetermined times to form the micro-structure of required precipitation-hardening.It will be by
The casting of this aging is cooled to environment temperature or about 25 DEG C, and be ready for any machine finishing etc. and then with it is other
Body structure assembling.
Such molding of aluminium-magnesium alloy can produce the thin-wall construction casting of complicated shape, need the machine of bottom line
Tool is processed to obtain specified finished form.Aluminium-magnesium alloy of the present invention can be used to form for automobile and be permitted for other application
More thin-walled die cast products.The cast member can be for example with complex three-dimensional forms, on its entire cross section or in its big portion
Divide the thickness on cross section with 2 to 5 millimeters.The example of other thin-walled vehicle body casting include such as front of the car hinge pillar casting,
Preceding damping tower casting, preceding torsion box casting, the lid structure of rear shock absorber, the tunnel structure in main cabin and rear rail structure.
Further illustrative examples apparent other practices and advantage of the invention given below from this specification.
Brief description
Fig. 1 is the perspective view of die casting damping tower.
Fig. 2 is the simplification view of the die casting machine shown with perspective partial cutaway view.
Preferred embodiment description
Thin-walled (most 3 millimeters thicks) aluminium alloy castings have potential attraction to the construction package of vehicle body.Such thin-section casting
Usually multicomponent welding assembly part can be substituted with single casting, therefore in addition to saving quality, also simplify vehicle body assembling process.It represents
Property using including damping tower, example as shown in Figure 1, being directed in the vehicle suspension system using McPherson pillar will
Damper-spring assembly end is fixed on vehicle body.Single casting substitution up to 8 independent punching presses can be used in casting damping tower
With a group arrangement.
Other examples of thin-wall construction casting include front of the car hinge pillar, rear shock absorber lid and rear rail, all these tables
Reveal comparable component integration.Most of thin-wall construction casting, damping tower 1 as shown in Figure 1, except such as most preferably scheming at feature 2
Show that explanation is outside whole usually thin-wall configuration, further includes multiple local strengthening features.These local strengthenings are generally characterized by thin
Wall rib not necessarily has consistent geometry along their length, either laterally or medially from main cast(ing) surface, such as simultaneously
Enter the shown outwardly extending rib 3 in damping tower 1.Some casting, as damping tower 1 may be usually small-sized, but above-listed other examples
Property structure may extend several hundred millimeters at least one dimension.Therefore, casting thin-wall uses molten metal before local solidification
Be fully filled with including there is significant challenge in terms of the mold of ribs or other local features, local solidification can fill up mold it
Molten metal is introduced mold by preceding too early blocking.The Successful Practice of such thin-walled die casting is therefore it is required that molten metal has high flowing
Property and require molten metal being rapidly introduced into mold.
For such casting selection aluminium alloy be preferably formed as cast member needed for physical property, mainly intensity and extension
Property (when the component is in its " manufacture state " or " as cast condition ").But, if it is desired, selected aluminium alloy should also respond subsequent heat
It handles to form the property of enhancing.In order to realize the output of suitable vehicle production, this base part can be with die casting, and due to thin
Wall design, it should which high pressure die casting is with Fast Filling mold and the premature setting for avoiding casting material or " material feeding (shot) " due to pouring in
And cut off motlten metal stream.The suitable alloy composite being described below in detail may be formed at when thickness is limited to less than 3 millimeters
Yield strength at environment temperature or about 25 DEG C more than 200 MPa.This thickness generally corresponds to aluminium alloy based structures casting,
Such as overall thickness those of listed above, and the thickness of ribs or other local features being incorporated in casting.
The damping tower 1 of Fig. 1 is shown ready for being assembled into vehicle.But cast member geometry is expected except representing
Cavity outside, die casting further includes the supplementary features for the manufacture for aiming at and promoting castings.Without limitation, these
Supplementary features may include that running gate system or cast gate (comprising the entrance for introducing molten metal), flow passage system or running channel (are used
Be distributed in die cavity in by molten metal) and overflow feature (to ensure to be fully filled with mold and accommodate oxidation product or any mistake
The die lubricant of amount).Include or any curing metal for being retained in these mold features can be incorporated to and remove from mold
In as cast condition body and it is attached to expected cast member, on damping tower 1 as shown in figure 1.Therefore, it cuts, modify, be machined or with other
Mode processes the as cast condition body removed from mold, and the casting for being ready to be assembled into vehicle or cast member are added with these
Character separation is simultaneously removed from as cast condition body.
Cooperative interaction and flexure of the strength and stiffness of Modern Vehicle Body from all components for constituting body structure.Cause
This, these car body components must be securely joined together.Although traditionally using welding, aluminium portion in the vehicle body of all steel construction
Machanical fastener can also be used in part, as self-punching rivet (SPR) is connected.Effective load transmitting jointing requirements are manufactured using SPR to connect
The structure for receiving rivet has enough ductility to deform without cracking or rupturing.If the material of the reception structure is shown not
The percentage of total elongation that the sample with 2 inches of (50.8 mm) full-lengths or test block less than about 10% are born, i.e. breaking extension
Rate can usually meet this requirement.Vehicle body assembling is usually carried out at 25 DEG C in environment temperature or about, therefore, in order to spirit
Selection connection method living, the stretching that thin-walled die casting structure should show at ambient temperature at least 10% and preferably greater than 10% are total
Elongation.
The simplified illustration that can be used for the die casting machine 10 of aluminum alloy die casting is shown in Fig. 2 with perspective partial cutaway view.Pressure
Casting machine 10 includes three essential parts, and the molten metal of predetermined volume can be rapidly introduced into the injecting unit 12 of mold, receive and melt
Melt the mold assembly 14 of metal and is tightly pressed together the holding of mould part 18,20 and separate die portions when filling mold
To remove the clamping unit 16 for solidifying as cast condition body.
In operation, by about 670 DEG C to 730 DEG C at a temperature of the molten metal 22(of predetermined volume be only herein
Illustration is shown as in the ladle 23) introduce the injecting unit 12 in 24 front of piston.Piston 24 then passes through some conjunctions
Suitable means are promoted rapidly by the synergy of hydraulic cylinder 28 and piston 30 towards the direction of arrow 26 herein.Piston 24 pushes away
Into pushing, molten metal loading 22 ' passes through suitable cast gate and runner system (not illustrating in detail) enters mold assembly
14.Mold assembly 14 includes along the mating mold part 18 and 20 that parting line 32 contacts.Mating mold part 18,20 includes mutual
Benefit and opposite die cavity, they impale mold volumes 34 when mould part to be combined, and the shape on boundary corresponds to pre-
The outer surface of phase cast member.It has splitted to become apparent from and illustrate mold volumes 34 simultaneously the respective part of mould part 18,20
And without the specific contribution of display 18,20 pairs of mold volumes 34 of mould part.But mold volumes 34 must be relative to parting line
32 are suitably orientated and position can remove cast member from mold.It would be recognized that mold volumes 34 shown in Fig. 2 have
Very simple shape, and being meant only to illustrate press casting procedure rather than represent can be before press casting procedure manufacture in this way
The highly complex component shape of description.Mould part 18,20 may also include for make cooling fluid recycle channel 36 so that
The temperature of mold assembly 14 is kept in predetermined temperature range, is herein 180 DEG C to 230 DEG C.Usual hydraulic operation (is not shown
Show hydraulic device) clamping unit 16 be operationally connected to mould part 18 and can make mould part 18 keep with mould part 20
Tightly engage injection pressure when molten metal " material feeding " 22 ' to be injected to mold assembly to be resistant to.Clamping unit 16 is also intended to
When molten metal is cured to recalling the mould part 18 engaged with mould part 20 when can remove as cast condition body.Due to being detailed below
The reason of, as cast condition body is usually not easy to separate with die cavity, and requires the pressure being applied on the Part portions of as cast condition body that will cast
State body is separated with die cavity.This local pressure is applied by one or more " mandril " (not shown)s, and the mandril is from mould part
20 promote outward to release as cast condition body.When removing it from die component 18,20, the temperature of cured as cast condition body usually exists
Within the temperature range of 180 DEG C to 260 DEG C.
The technical staff in die casting field, it will be recognized that aluminium alloy die casting, the especially casting of thin-walled aluminium casting requires pair
Some modifications are made in simplified illustration shown in Fig. 2 and corresponding simplified description provided above.For example, molten aluminum and air have
There is high response, therefore all processing and transfer of molten aluminum should carry out under vacuum or protective atmosphere.It is also preferred that evacuating mould
Chamber and related cast gate and runner system are simultaneously held it under vacuum, to promote mold to fill and carry the air in casting secretly
Or retention minimizes and preferred elimination.The other molds spy for being intended to eliminate local contraction and hole can also be incorporated in mould part
Sign, such as squeeze pin.Can be understood by discussion above do not enumerate clearly but the technical staff in die casting field known to these and
Other feature.
Mould part is usually made of hardened steel.At a temperature of common aluminium alloy compression casting, iron can maximum about 1.5 weights
The amount of amount % is dissolved in pure molten aluminum.This and by aluminium alloy be pushed into mold when quick metal flow process in mold erosion
Possibility may cause some dissolutions of mold materials together.After hardening, therefore aluminium alloy may arrive in local welding or soldering
On die surface, cause from die cavity release as cast condition body when the problem of.As cast condition body still include expected component or casting and be originated from protect
Stay in any supplementary features of the metal in cast gate, running channel and overflow feature.If serious, the soldering of the component and mold may
It is required that applying high ejection pressure to remove component from mold, this is possible to damage casting.If casting has thin-walled
(it may be by the stress for being more than its yield strength under excessive ejection pressure), is especially possible to damage casting.It would be recognized that
Usually be apparently higher than environment temperature at a temperature of, the pushing out casting between about 180 DEG C to 260 DEG C in the above-described example, because
This its yield strength is reduced relative to its environment temperature yield strength.
Environment temperature intensity and ductility under as-cast condition are provided using magnesium as the aluminium alloy of major alloying elements
Attractive combination, therefore be for as described above and illustrate casting thin-wall component attractive candidate
Object.But aluminium-magnesium base alloy is inclined to due to their mold soldering without being widely used in die casting or compression casting.
Can be used for mitigating mold soldering a kind of method be using the aluminium alloy of more high Fe content with limit casting alloy from
Die surface absorbs and dissolves the ability of additional iron.But form the Tie Tong of the complicated intermetallic compound of ductility reduction
Often it is considered as undesirable impurity rather than alloying element in aluminium alloy, and generally remains in 0.25 weight % and lower, hence it is evident that is small
In the maxima solubility of about 1.5 weight %.When combining with the manganese additive amount of most 0.8 weight %, about 0.2 weight can contained
It measures in the alloy of % iron content and realizes some mold soldering benefits, but these alloys may be more difficult to cast, it is rotten with certain stress
Erosion cracking sensitivity simultaneously shows the property substantially changeing with the thickness of cast member.As an example, one kind containing manganese alloy
Containing about 5 weight % magnesium, about 2 weight % silicon, about 0.6 weight % manganese, it is limited to the iron of 0.2 weight % and surplus is essentially
Aluminium.In the casting of this composition of the wall thickness less than 2 millimeters, the as cast condition yield strength reported is higher than 220 MPa, and as cast condition is drawn
Stretching percentage of total elongation is 10-15%.For the casting for the analogous composition that wall thickness is 2 to 4 millimeters, as cast condition yield strength is 160 MPa
To 220 MPa and as cast condition stretching percentage of total elongation is 12% to 18%.
Welding or soldering can also be made to mitigate or minimize by applying lubricant or " parting compound " on mold.But in this way
Parting compound must be applied to after taking out each component and before injecting next " material feeding " institute for encountering molten aluminium alloy
Have on mould part, and may be accumulated on mold with reuse in some formulas, it is desirable that in manufacture certain amount
Casting after from mold supernatant removal of residue.
It is excellent to have determined that a kind of substitution aluminium-magnesium-based diecasting alloys especially provide in a thickness of 3 millimeters or smaller casting
In the remarkable advantage of other substitute compositions.Specific advantages include: to mitigate mold soldering tendency；Keep good Castability with
It is easy to get thin-walled and medium wall casting；Excellent engineering properties is obtained in thin-section casting；With in wet and marine environment
Show good corrosion resistance.Formed such property suitable composition (all in terms of weight %) include 2 to 15% magnesium,
0.2 to 3% silicon, 0.05 to 0.5% chromium, 0.05 to 0.5% manganese, less than 0.2% iron, 0.05 to 0.2% titanium, other metallic elements (as
Impurity) less than 0.5% and surplus be aluminium.The slab of such alloy has been shown, at ambient temperature, 250 MPa and higher
Tensile yield strength values, 15% and higher general extension value and 280 MPa ultimate strength.In the as cast condition part of most 3 millimeters thicks
Property as middle acquisition.
The alloy preferably constitute for, by weight, 5.0 to 9.0% magnesium, 0.25 to 0.35% chromium, 0.15 to 0.35% manganese,
1.0 to 3.0% silicon, 0.05 to 0.15% titanium, less than 0.15% iron, less than 0.01% bronze medal, less than 0.003% phosphorus, less than 0.03% strontium and
Surplus is substantially aluminium.Although not depending on such theory, it is believed that the contribution of various alloying elements is: magnesium provides the conjunction
The solution strengthening of gold；Chromium and manganese all enhance the micro-structure of casting alloy product and being found and iron in the alloy molten are effectively reduced
Xie Du reduces the reactivity and undesirable mold soldering of the alloy and mold；Limitation iron prolongs to avoid reduction cast article
The intermetallic phase of malleability；Titanium serves as grain refiner to improve the ductility of cast article and mitigate the fire check in cast article
It is formed；Silicon forms Mg2Si eutectic phase, inhibition are tended to be deposited in grain boundary and promote the β phase of stress corrosion cracking
(Al3Mg2) formation.
Although to avoid process complexity, above-mentioned alloy preferably shows high-intensitive and good extension under as-cast condition
Property, but engineering properties, especially intensity property can be enhanced with subsequent heat treatment to promote precipitation-hardening.It is suitble to above-mentioned composition
Suitable heat treatment is related to imposing solution treatment to casting, by the temperature that casting is heated approximately to 480 DEG C to about 540 DEG C
With casting is kept at this temperature 2 to 6 hours constitute.This heat treatment can dissolve at least one in the micro-structure of cast product
A little separation mutually so that elemental composition dissolution with realize more evenly form and the micro-structure of solutionizing.At the end of solution treatment,
Casting should be quickly cooled to 50 DEG C to 70 DEG C of temperature with " freezing " solid solution by water quenching or by the way that forced air is cooling
The micro-structure of change.Casting then by being heated to 180 DEG C to 250 DEG C of temperature and can be kept at this temperature 3 to 8 by the casting
Hour so that the element precipitating of dissolution, then air is cooled to environment temperature and precipitation-hardening.It, should after this heat treatment process
Cast product can have the yield strength of 280MPa, the ultimate tensile strength of 320MPa and 7 to 10% percentage of total elongation.
Thus, it is found that these acierals containing chromium prevent dissolved ferric iron and the soldering of mold, and keep in making space
Enough mobility for big thin-wall die casting.Therefore these acierals containing chromium are suitable for being formed with thin-walled portion
Complicated shape casting simultaneously forms the combination of good strength and ductility and in wet and marine environment in cast product
Good corrosion resistance.In addition, for cosmetic purposes, the surface of the cast product is easy finishing or polishing.
Claims (10)
1. aluminium base diecasting alloys, substantially by 2 to 15% magnesium by weight, 0.2 to 3% silicon, 0.05 to 0.5% chromium, 0.05 to 0.5%
Manganese, 0.05 to 0.2% titanium are constituted less than 0.2% iron, at most about 0.5% other elements and balance aluminum.
2. aluminium base diecasting alloys, substantially by 2 to 15% magnesium by weight, 0.2 to 3% silicon, 0.05 to 0.5% chromium, 0.05 to 0.5%
Manganese, 0.05 to 0.2% titanium are constituted less than 0.2% iron, at most about 0.5% other elements and balance aluminum；The casting of the alloy tries
Ultimate Tensile of the sample in the case where the casting sample is not thermally treated at least tensile strength of 250 MPa, 280 MPa
Intensity and at least 15% percentage of total elongation, measured on sample at each comfortable 25 DEG C.
3. aluminium base diecasting alloys, substantially by 5 to 9% magnesium by weight, 0.25 to 0.35% chromium, 0.15 to 0.35% manganese, 1.0 to
3.0% silicon, 0.05 to 0.1% titanium, less than 0.15% iron, less than 0.01% bronze medal, less than 0.01% zinc, less than 0.003% phosphorus, be less than
0.03% strontium and balance aluminum are constituted.
4. the product has at least one with a thickness of 3 millimeters or smaller thin-walled using the method for acieral die cast product
Part, the product are cast in the die cavity of the mold formed by ferrous alloy；The described method includes:
By the die cavity of the molten aluminum matrix alloy injection ferrous alloy mold of mold packing volume, the die cavity has by separating
, a part on the surface and the die cavity that opposite mold component is formed limit each thin-walled portion, and in the molten aluminum
Keep predetermined pressure to force molten alloy to follow cavity surface completely in based alloy, the molten aluminum matrix alloy have substantially by
2 to 15% magnesium by weight, 0.05 to 0.5% chromium, 0.05 to 0.5% manganese, are less than 0.2% iron, at most about 0.5% at 0.2 to 3% silicon
The composition that other elements and balance aluminum are constituted；With
The cooling molten aluminum matrix alloy is to form the solid shape of the product and remove the solid die cast product shape.
5. the method for die cast product as described in claim 4, wherein the molten aluminum matrix alloy of the casting is substantially by by weight
5 to 9% magnesium of meter, less than 0.15% iron, 0.25 to 0.35% chromium, 0.15 to 0.35% manganese, less than 0.01% bronze medal, 2.0 to 3.0% silicon,
It is constituted less than 0.01% zinc, 0.05 to 0.1% titanium, less than 0.003% phosphorus, less than 0.01% strontium and balance aluminum.
6. the method for die cast product as described in claim 4, wherein the temperature of the molten aluminum matrix alloy of the volume of injection die cavity
Degree is 670 DEG C to 730 DEG C.
7. the method for die cast product as described in claim 4, wherein making in the forming process of the cast product opposite
Mold component be maintained at 180 DEG C to 230 DEG C of temperature.
8. the method for die cast product as described in claim 4, wherein making in the forming process of the cast product opposite
Mold component be maintained at 180 DEG C to 230 DEG C of temperature and at a temperature of 180 DEG C to 230 DEG C of cast product from mold component
It is middle to remove the cast product.
9. the method for die cast product as described in claim 4, wherein removed from mold the die cast product shape and
Further reheated during precipitation-hardening before cooling.
10. the method for die cast product as described in claim 4, wherein the die cast product shape (i) is moved from mold
Remove and be heated to 480 DEG C to 540 DEG C of temperature 2 to 6 hours to promote cast product micro-structure in separation phase dissolution,
(ii) it is quickly cooled to the temperature lower than 100 DEG C, and (iii) is then heated to 180 DEG C to 250 DEG C of temperature for a period of time
To generate precipitation-hardening in cast product.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2016/085388 WO2017210916A1 (en) | 2016-06-10 | 2016-06-10 | Magnesium-containing, aluminum-based alloy for thin-wall castings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109312430A true CN109312430A (en) | 2019-02-05 |
Family
ID=60577625
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680086607.3A Pending CN109312430A (en) | 2016-06-10 | 2016-06-10 | The acieral containing magnesium for thin-section casting |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20190177818A1 (en) |
| CN (1) | CN109312430A (en) |
| DE (1) | DE112016006826T5 (en) |
| WO (1) | WO2017210916A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109778020A (en) * | 2019-03-11 | 2019-05-21 | 江苏华企铝业科技股份有限公司 | The high-densit aluminum titanium alloy ingot of high-purity and its manufacturing method |
| JP2021523291A (en) * | 2018-05-07 | 2021-09-02 | アルコア ユーエスエイ コーポレイション | Al-Mg-Si-Mn-Fe cast alloy |
| CN118268530A (en) * | 2024-04-09 | 2024-07-02 | 南通莱特伟特汽配科技有限公司 | Aluminum magnesium alloy die casting method for automobile parts |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018161311A1 (en) | 2017-03-09 | 2018-09-13 | GM Global Technology Operations LLC | Aluminum alloys |
| CN114778147B (en) * | 2022-04-21 | 2024-09-24 | 重庆长安汽车股份有限公司 | Intensity testing device of aluminum alloy shock absorber |
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|---|---|---|---|---|
| WO2000043560A1 (en) * | 1999-01-22 | 2000-07-27 | Aluminium Lend Gmbh | Aluminum-magnesium-silicon alloy |
| CN1654694A (en) * | 2004-02-11 | 2005-08-17 | 莱茵费尔登炼铝厂有限责任公司 | Casting of an aluminium alloy |
| US20090214381A1 (en) * | 2005-05-19 | 2009-08-27 | Trenda Guenther | Aluminum alloy |
| WO2013144343A1 (en) * | 2012-03-30 | 2013-10-03 | Jaguar Land Rover Limited | Alloy and method of production thereof |
| CN104862552A (en) * | 2015-05-28 | 2015-08-26 | 马鸿斌 | Novel aluminum alloy and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5595055B2 (en) * | 2010-01-29 | 2014-09-24 | ユニ・チャーム株式会社 | Method for manufacturing absorbent article |
| US9352388B2 (en) | 2013-12-04 | 2016-05-31 | GM Global Technology Operations LLC | Integration of one piece door inner panel with impact beam |
-
2016
- 2016-06-10 CN CN201680086607.3A patent/CN109312430A/en active Pending
- 2016-06-10 DE DE112016006826.3T patent/DE112016006826T5/en not_active Withdrawn
- 2016-06-10 WO PCT/CN2016/085388 patent/WO2017210916A1/en active Application Filing
- 2016-06-10 US US16/302,122 patent/US20190177818A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000043560A1 (en) * | 1999-01-22 | 2000-07-27 | Aluminium Lend Gmbh | Aluminum-magnesium-silicon alloy |
| CN1654694A (en) * | 2004-02-11 | 2005-08-17 | 莱茵费尔登炼铝厂有限责任公司 | Casting of an aluminium alloy |
| US20090214381A1 (en) * | 2005-05-19 | 2009-08-27 | Trenda Guenther | Aluminum alloy |
| WO2013144343A1 (en) * | 2012-03-30 | 2013-10-03 | Jaguar Land Rover Limited | Alloy and method of production thereof |
| CN104862552A (en) * | 2015-05-28 | 2015-08-26 | 马鸿斌 | Novel aluminum alloy and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2021523291A (en) * | 2018-05-07 | 2021-09-02 | アルコア ユーエスエイ コーポレイション | Al-Mg-Si-Mn-Fe cast alloy |
| JP7438134B2 (en) | 2018-05-07 | 2024-02-26 | アルコア ユーエスエイ コーポレイション | Al-Mg-Si-Mn-Fe casting alloy |
| CN109778020A (en) * | 2019-03-11 | 2019-05-21 | 江苏华企铝业科技股份有限公司 | The high-densit aluminum titanium alloy ingot of high-purity and its manufacturing method |
| CN118268530A (en) * | 2024-04-09 | 2024-07-02 | 南通莱特伟特汽配科技有限公司 | Aluminum magnesium alloy die casting method for automobile parts |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2017210916A1 (en) | 2017-12-14 |
| DE112016006826T5 (en) | 2019-01-10 |
| US20190177818A1 (en) | 2019-06-13 |
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