CN105112799A - Special spring wire for vehicle engine - Google Patents
Special spring wire for vehicle engine Download PDFInfo
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- CN105112799A CN105112799A CN201510549850.1A CN201510549850A CN105112799A CN 105112799 A CN105112799 A CN 105112799A CN 201510549850 A CN201510549850 A CN 201510549850A CN 105112799 A CN105112799 A CN 105112799A
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Abstract
The invention discloses a special spring wire for a vehicle engine. Taking the mass of the special spring wire for the vehicle engine as the benchmark, the following ingredients are included: 0.45-0.50 percent of C, 1.5-2 percent of Cr, 0.6-1 percent of Mo, 0.50-0.60 percent of Mn, 0.50-0.60 percent of Cu, 0.05-0.08 percent of Ni, 0.10-0.20 percent of Si, 0-0.03 percent of P, 0-0.025 percent of S, 0.015-5 percent of V and the balance of Fe. According to theinvention, as Mo, Cr, Cu, V and other elements are reasonably added, the ductility and the decay resistance of the special spring wire are greatly improved; and the frequently appearing problem that a conventional spring wire has high probabilities of fracture, corrosion and the like is effectively solved, and the service life of the spring wire is greatly prolonged.
Description
Technical field
The present invention relates to a kind of spring wire, be specifically related to one not frangibility, corrosion resistant vehicle motor special purpose spring silk.
Background technology
The stainless steel spring steel wire generally used at present is divided into following three classes: 1. phase transformation strengthening geneva stainless steel spring steel wire; 2. working hardening austeno-martensite stainless steel spring steel wire; 3. precipitation hardening austeno-martensite stainless steel spring steel wire.The shortcoming of phase transformation strengthening geneva stainless steel spring steel wire is: 1. adopt strengthening Martensite Stainless Steel to be that raw material is made, need thermal treatment again, to improve its elasticity after making spring; Then carry out pickling, make its smooth surface, even need chromium plating, nickel etc., manufacturing process is complicated, and yield rate is low, and cost is high; 2. poor toughness, fragility is responsive.The shortcoming of working hardening austenitic stainless steel spring wire is: 1. intensity and weakness low, anti-lax and creep properties is poor; 2. the temperature factor of Young's modulus is larger; 3. wherein nickel content is 8%-10%, and nickel is the narrow resources that a kind of price is higher, can not meet again the requirement of energy-conserving and environment-protective.
Summary of the invention
Object of the present invention, for the deficiencies in the prior art, provides one not frangibility, pull resistance good, corrosion resistant vehicle motor special purpose spring silk.
To achieve these goals, present invention employs following technical scheme:
A kind of vehicle motor special purpose spring silk, with the quality of this vehicle motor special purpose spring silk for benchmark, described vehicle motor special purpose spring silk contain 0.45 ~ 0.50% C, 1.5 ~ 2% Cr, 0.6 ~ 1% Mo, 0.50 ~ 0.60% Mn, 0.50 ~ 0.60% Gu, 0.05 ~ 0.08% Ni, Si, the P of 0 ~ 0.03% of 0.10 ~ 0.20%, the V of the S of 0 ~ 0.025% and 0.015 ~ 5%, surplus is Fe.
Content proportioning as the further preferably each element of interalloy of the present invention: described vehicle motor special purpose spring silk contain 0.45 ~ 0.50% C, 1.6 ~ 1.9% Cr, 0.7 ~ 0.8% Mo, 0.55 ~ 0.60% Mn, 0.50 ~ 0.60% Gu, 0.05 ~ 0.07% Ni, Si, the P of 0.01 ~ 0.03% of 0.10 ~ 0.20%, the V of the S of 0.015 ~ 0.025% and 0.015 ~ 3%, surplus is Fe.
Content proportioning as the further preferably each element of interalloy of the present invention: described vehicle motor special purpose spring silk contain 0.45 ~ 0.50% C, 1.6 ~ 1.8% Cr, 0.7 ~ 0.75% Mo, 0.55 ~ 0.60% Mn, 0.50 ~ 0.60% Gu, 0.05 ~ 0.06% Ni, Si, the P of 0.01 ~ 0.015% of 0.10 ~ 0.15%, the V of the S of 0.015 ~ 0.020% and 0.015 ~ 1%, surplus is Fe.
The present invention, by optimizing and revising composition and the proportioning of the composition of alloy, greatly improves the mechanical property of spring wire, especially in plasticity-, toughness, makes its more resistance to compression, tension, not frangibility, longer service life.
Below the Partial Elements of regulation and control content is described:
Chromium (Cr), chromium can improve hardenability and the tempering resistance of spring wire effectively, improve the intensity of steel wire, and chromium can also reduce the activity of carbon, improve the leaching carbon of steel wire, and form fine carbide, the steel surface decarburization in heating, rolling and heat treatment process and greying tendency can be reduced, improve toughness and wearability; But, during chromium too high levels, form the carbide of chromium on the contrary in a large number, worsen bullet subtractive energy and the toughness of steel wire.Therefore, in the present invention, in control spring silk, the content of chromium is 1.5 ~ 2%(weight percent), more preferably 1.6 ~ 1.8%.
Molybdenum (Mo), molybdenum is Stainless Steel Wire non-corrosive, corrosion resistant key element; The performance of molybdenum additives on steel has very large impact, and a small amount of molybdenum is added among steel, and steel wire can be made to have very excellent performance, greatly can increase the wear resisting property of spring wire, increase the service life.High strength alloy steel can improve steel hardness, intensity and toughness containing molybdenum, and the good weldability of tool and corrosion resistance.After cast iron adds the molybdenum of 0.3% ~ 1.0%, will greatly improve tension, bending resistance and fatigue resistance, also can improve the homogeneity of casting structure, this especially seems important to massive casting, these foundry goods are widely used in automobile making, pressure pipeline and mold etc., and in processing industry, molybdenum is used more extensive.The mould that relative superiority or inferiority uses is heated, mechanical repeated stress effect causes fatigue of materials to occur crackle.And utilizing thermal expansivity little, the molybdenum that heat conduction is strong, high strength is good or molybdenum base alloy, significantly extend die life; Add the performance that alloying element just can improve them in Xiang Tie, steel and other metal, as hardenability, under intensity, erosion resistance and resistance to abrasive property.But during the too high levels of molybdenum, then worsen the plasticity of steel, toughness and processing characteristics.Therefore, in the present invention, the content that contriver controls molybdenum in spring wire is 0.6 ~ 1%(weight percent), more preferably 0.7 ~ 0.8%, optimum optional 0.75%.
Carbon (C), carbon is the representative element of stable austenite, is contained for improving intensity and quenching hardness, guaranteeing the important element of wearability in spring wire, is that to obtain the spring wire of high strength and hardness necessary.Although high carbon content to the intensity of steel wire, hardness, elasticity and bullet subtractive can etc. favourable, be unfavorable for plasticity and the toughness of steel wire, and yield tensile ratio is reduced, Decarburization Sensitivity increases, the anti-fatigue performance of deterioration steel and processing characteristics.Therefore, the present invention needs the content controlling carbon, makes the content of carbon in spring wire be 0.45 ~ 0.50%(weight percent).
Silicon (Si), element silicon is the elastic main contribution element of spring wire, is the element of reinforced ferrite tissue, can also grow by crystallization control grain simultaneously, improves acid resistance, strengthen the mobility of molten steel when casting, reduce surface imperfection.But, the plasticity and the toughness that reduce steel can be caused when silicone content is too high, and cause the activity of carbon to increase, thus decarburization and graphited tendency is there is in the rolling and heat-processed of steel wire, and make smelting difficulty, easily formation inclusion thus worsen the anti-fatigue performance of steel wire.Therefore, in control spring silk, the content of silicon is in 0.10 ~ 0.20%(significant percentage), ensure that spring wire enough elasticly reduces its plasticity to steel wire and the disadvantageous effect of toughness having simultaneously as far as possible.
Manganese (Mn), when tempering, manganese and phosphorus have strong grain boundary cosegregation to be inclined to, and promote temper brittleness, worsen the toughness of steel wire.But on the other hand, manganese is the effective element of deoxidation and desulfurization, uses as reductor, hardening capacity and the intensity of spring wire can also be improved when thermal treatment, the solid solubility of N can be reduced and be difficult to function as described above when addition is less than 0.6%.Therefore, the present invention needs the content controlling manganese in spring wire to be 0.50 ~ 0.60%(weight percent), preferably can be 0.55 ~ 0.6% further.
Phosphorus (P), phosphorus can form microsegregation when solidification of molten steel, subsequently when austenitizing temperature heats segregation at crystal boundary, the fragility of steel is enlarged markedly, so should the content of phosphorus in control spring steel wire as low as possible, general is 0.03%(weight percent by the content of phosphorus in spring wire) below, preferably below 0.015%.
Sulphur (S), in iron and steel, always can there is sulphur more or less, sulphur and manganese form manganese sulfide inclusion and also have certain segregation at crystal boundary, can worsen toughness and the fatigue resistance of steel wire like this, therefore it is generally acknowledged that sulphur is harmful element, the large content of sulphur in steel should be reduced as far as possible.But the Reoxides that molten steel analyzes in process of setting is mostly the CaO-Al of low melting point phase
2o
3-SiO
2, and in molten steel, also have the Al of pure state all the time
2o
3impurity, the Al of this pure state
2o
3impurity also affects plasticity and the toughness of spring wire.But because MnS is that plasticity is mingled with, to the Al of this pure state
2o
3there is certain package action, thus reduce brittle inclusion to the destruction of spring wire, so can by suitably improving the content of sulphur in steel thus improving plasticity and the toughness of spring wire preferably.But consider that MnS is inclusion after all, too much MnS can have influence on the continuity of steel matrix.Therefore, control to be that pass of the present invention is built equally to the content of sulphur, in the present invention, in control spring steel wire, the content of sulphur is for being less than or equal to 0.025%(weight percent).
Vanadium (V), vanadium adds in steel and forms VC, VN and/or VCN, and based on VC in spring wire, the VC particle of small and dispersed to the pinning effect of original austenite crystal boundary, stops growing up of austenite crystal by it, can fining austenite grains.V-alloyed steel has obvious second phase particles to separate out, play the effect of precipitation strength, be beneficial to the intensity, toughness and the anti-fatigue performance that improve spring wire, but when the content of vanadium of V-alloyed steel is too much, precipitation particles is obviously thicker, loses above-mentioned effect, in addition, consider the type of made spring wire and control the content of vanadium in steel wire, in spring wire of the present invention, the content of vanadium is 0.015 ~ 5%(significant percentage), more preferably 0.015 ~ 1%.
Nickel (Ni), nickel has good over-all properties, can resistance to various acid corrosion and stress corrosion, and property is tough and tensile, is magnetic and good plasticity-, and welding property might as well; Under 650 ~ 1000 DEG C of high temperature, have higher intensity and anti-oxidant, resistance to combustion gas corrosion ability, be most widely used in superalloy, that hot strength the is the highest class alloy.In the present invention, the content controlling nickel in spring wire is 0.05% ~ 0.08%, and optimum content is 0.06%.
The preparation method of vehicle motor special purpose spring silk of the present invention adopts the technique of this area routine, specific as follows:
(1) first carry out calculating or converting according to the content of element each in finished product spring wire, take raw ore or the compound of respective element, then the raw material taken is carried out just refining; (2) refining; (3) cooling forming; (4) rolling; (5) quench; (6) tempering; (7) coating drying; (8) spring wire is drawn into.
In above-mentioned preparation method, the temperature of described just refining is 1700 ~ 1850 DEG C, and the time of just refining is 30 ~ 50 minutes; The temperature of described refining is 1600 ~ 1650 DEG C, and the time of refining is 30 ~ 55 minutes.
In above-mentioned preparation method, described cooling forming comprises and is first 15 ~ 25 DEG C/min with speed of cooling and is cooled to less than 1100 DEG C, then naturally cools to room temperature.
In above-mentioned preparation method, described rolling comprises tandem rolling or semi-tandem rolling.
In above-mentioned preparation method, the temperature of described quenching is 1000 ~ 1200 DEG C, and the soaking time of quenching is 30 ~ 60 minutes; The temperature of described tempering is 400 ~ 500 DEG C; The time of tempering insulation is 60 ~ 120 minutes; The temperature of described oven dry is 200 ~ 250 DEG C.
Advantage of the present invention:
Vehicle motor special purpose spring silk of the present invention, by the proportioning of each element of optimized alloy, adds the elements such as molybdenum, chromium, copper, vanadium, drastically increases its toughness, plasticity-, corrosion resistance nature reasonably; Efficiently solve current motor car engine special metals spring wire often to occur the problems such as viscous deformation, frangibility, easy-to-rust easily occur, substantially prolongs its work-ing life.
Embodiment
Below in conjunction with embodiment, the present invention is further described.
Embodiment 1:
A kind of vehicle motor special purpose spring silk, with the quality of this vehicle motor special purpose spring silk for benchmark, C containing 0.45%, the Cr of 1.5%, the Mo of 0.6%, Mn, the Gu of 0.50%, Ni, the Si of 0.10%, the V of 0.015% of 0.05% of 0.50%, surplus is Fe.
Embodiment 2:
A kind of vehicle motor special purpose spring silk, with the quality of this vehicle motor special purpose spring silk for benchmark, C containing 0.50%, the Cr of 2%, 1% Mo, 0.60% Mn, 0.06% Gu, 0.08% Ni, Si, the P of 0.03% of 0.20%, the V of the S of 0.025% and 5%, surplus is Fe.
Embodiment 3:
A kind of vehicle motor special purpose spring silk, with the quality of this vehicle motor special purpose spring silk for benchmark, C containing 0.45%, the Cr of 1.6%, 0.7% Mo, 0.55% Mn, 0.05% Gu, 0.05% Ni, Si, the P of 0.01% of 0.10%, the V of the S of 0.015% and 0.015%, surplus is Fe.
Embodiment 4:
A kind of vehicle motor special purpose spring silk, with the quality of this vehicle motor special purpose spring silk for benchmark, C containing 0.50%, the Cr of 1.9%, 0.8% Mo, 0.60% Mn, 0.06% Gu, 0.07% Ni, Si, the P of 0.03% of 0.20%, the V of the S of 0.025% and 3%, surplus is Fe.
Embodiment 5:
A kind of vehicle motor special purpose spring silk, with the quality of this vehicle motor special purpose spring silk for benchmark, C containing 0.50%, the Cr of 1.7%, 0.75% Mo, 0.60% Mn, 0.55% Gu, 0.06% Ni, Si, the P of 0.015% of 0.15%, the V of the S of 0.020% and 1%, surplus is Fe.
Embodiment 6:
A kind of vehicle motor special purpose spring silk, with the quality of this vehicle motor special purpose spring silk for benchmark, C containing 0.47%, the Cr of 1.75%, 0.75% Mo, 0.58% Mn, 0.055% Gu, 0.055% Ni, Si, the P of 0.015% of 0.12%, the V of the S of 0.01% and 0.05%, surplus is Fe.
Claims (3)
1. a vehicle motor special purpose spring silk, it is characterized in that: with the quality of this vehicle motor special purpose spring silk for benchmark, described vehicle motor special purpose spring silk contain 0.45 ~ 0.50% C, 1.5 ~ 2% Cr, 0.6 ~ 1% Mo, 0.50 ~ 0.60% Mn, 0.50 ~ 0.60% Gu, 0.05 ~ 0.08% Ni, Si, the P of 0 ~ 0.03% of 0.10 ~ 0.20%, the V of the S of 0 ~ 0.025% and 0.015 ~ 5%, surplus is Fe.
2. vehicle motor special purpose spring silk according to claim 1, it is characterized in that: described vehicle motor special purpose spring silk contain 0.45 ~ 0.50% C, 1.6 ~ 1.9% Cr, 0.7 ~ 0.8% Mo, 0.55 ~ 0.60% Mn, 0.50 ~ 0.60% Gu, 0.05 ~ 0.07% Ni, Si, the P of 0.01 ~ 0.03% of 0.10 ~ 0.20%, the V of the S of 0.015 ~ 0.025% and 0.015 ~ 3%, surplus is Fe.
3. vehicle motor special purpose spring silk according to claim 1 and 2, it is characterized in that: described vehicle motor special purpose spring silk contain 0.45 ~ 0.50% C, 1.6 ~ 1.8% Cr, 0.7 ~ 0.75% Mo, 0.55 ~ 0.60% Mn, 0.50 ~ 0.60% Gu, 0.05 ~ 0.06% Ni, Si, the P of 0.01 ~ 0.015% of 0.10 ~ 0.15%, the V of the S of 0.015 ~ 0.020% and 0.015 ~ 1%, surplus is Fe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549850.1A CN105112799A (en) | 2015-09-01 | 2015-09-01 | Special spring wire for vehicle engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510549850.1A CN105112799A (en) | 2015-09-01 | 2015-09-01 | Special spring wire for vehicle engine |
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| CN105112799A true CN105112799A (en) | 2015-12-02 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951944A (en) * | 1994-12-21 | 1999-09-14 | Mitsubishi Steel Mfg. Co., Ltd. | Lowly decarburizable spring steel |
| CN101400818A (en) * | 2005-12-15 | 2009-04-01 | 株式会社神户制钢所 | Spring steel, method for producing a spring using said steel and a spring made from such steel |
| CN103614634A (en) * | 2013-11-28 | 2014-03-05 | 柳城县鼎铭金属制品有限公司 | Alloy spring wire and preparation method thereof |
-
2015
- 2015-09-01 CN CN201510549850.1A patent/CN105112799A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5951944A (en) * | 1994-12-21 | 1999-09-14 | Mitsubishi Steel Mfg. Co., Ltd. | Lowly decarburizable spring steel |
| CN101400818A (en) * | 2005-12-15 | 2009-04-01 | 株式会社神户制钢所 | Spring steel, method for producing a spring using said steel and a spring made from such steel |
| CN103614634A (en) * | 2013-11-28 | 2014-03-05 | 柳城县鼎铭金属制品有限公司 | Alloy spring wire and preparation method thereof |
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Application publication date: 20151202 |