CN108907498A - A kind of high tenacity corrosion resistant submerged arc metal powder core solder wire - Google Patents
A kind of high tenacity corrosion resistant submerged arc metal powder core solder wire Download PDFInfo
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- CN108907498A CN108907498A CN201810873279.2A CN201810873279A CN108907498A CN 108907498 A CN108907498 A CN 108907498A CN 201810873279 A CN201810873279 A CN 201810873279A CN 108907498 A CN108907498 A CN 108907498A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
- B23K35/3053—Fe as the principal constituent
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Abstract
The present invention provides a kind of high tenacity corrosion resistant submerged arc metal powder core solder wires, including crust and medicine core；The medicine core includes each component of following parts by weight：5~20 parts of silicomangan, 10~30 parts of manganese metal, 5~20 parts of magnesium powder, 40~60 parts of nickel powder, 10~30 parts of chromium powder, 1~5 part of molybdenum powder, 10~30 parts of copper powder, 5~20 parts of ferrotianium, 1~5 part of ferro-boron, 1~5 part of rare earth ferrosilicon, 850~900 parts of iron powder.High tenacity corrosion resistant submerged arc metal powder core solder wire of the present invention, deposited metal good mechanical performance.There is certain resistance to sea atmosphere corrosion performance, is used for mating marine atmosphere corrosion-resisting steel and the bridge construction of resistance to sea atmosphere corrosion.The bridge of resistance to sea atmosphere corrosion can exempt coating process, have environmental advantage, it is possible to reduce periodic maintenance expense, overall cost are low.
Description
Technical field
The invention belongs to flux-cored wire fields, more particularly, to a kind of high tenacity marine atmosphere corrosion-resisting steel submerged arc metal
Flux cored wire.
Background technique
Exempting from the weather-proof steel bridge of coating has the comprehensive advantage that environmental protection, maintenance cost are low, life cycle management is long.Developed country is weather-proof
Steel Bridge development is more early, and the weather-proof steel bridge in the U.S. accounts for steel bridge sum more than 50%；Canada has about 90% or so steel bridge to adopt
Also reach 20% or so with the ratio of weathering steel, the weather-proof steel bridge of Japan.And the practical implementation of the weather-proof steel bridge in China just rises
Step.
Weathering steel includes resistance to normal atmospheric industrial environment corrosion steel and marine atmosphere corrosion-resisting steel." corrosion resistance index ",
It is the corrosion resistance based on normal atmospheric industrial environment light plate.China main economic prosperity city is in coastal area, institute
Gradually increased with the application of marine atmosphere corrosion-resisting steel in recent years." weatherability alloy index " can preferably reflect that bridge exists
Corrosion resistance under naval air environment.
" the corrosion resistance index " of weathering steel bridge steel plate is usually required that 6.0 or more.
GBT 4171-2008《Weather resistant structural steel》In, " corrosion resistance index " I=26.01 (%Cu)+3.88 (%Ni)+
1.20 (%Cr)+1.49 (%Si)+17.28 (%P) -7.29 (%Cu) (%Ni) -9.10 (%Ni) (%P) -33.39 (%Cu)
(%Cu).
JIS Z3320-2012《Weathering steel gas-shielded flux-cored wire》In, " weatherability alloy index " V=1/ { (1.0-
0.16[C])×(1.05-0.05[Si])×(1.04-0.016[Mn])×(1.0-0.5[P])×(1.0+1.9[S])×
(1.0-0.10[Cu])×(1.0-0.12[Ni])×(1.0-0.3[Mo])×(1.0-1.7[Ti])}；Wherein [C], [Si],
The deposited metal that [Mn], [P], [S], [Cu], [Ni], [Mo] and [Ti] respectively represents C, Si, Mn, P, S, Cu, Ni, Mo and Ti contains
Measure percentage.
Marine atmosphere corrosion-resisting steel is in order to improve corrosion resistance, and the mode generally used is improves Ni content, to mention
High whole anti-oxidant, corrosion resistance.But Ni belongs to noble metal, and Ni content is higher, and cost is higher, so for practical application
For, nor the higher the better for Ni content.
Some coastal engineerings for slightly far or in ambient atmosphere having corrosive elements content relatively low apart from ocean, i.e., resistance to ocean
Atmospheric corrosion performance requires lower area, and weatherability alloy index slightly lower steel plate and wlding can be selected.Both can guarantee
The corrosion resistance of weather-proof engineering, and engineering cost can be reduced.Therefore, steel mill develops 1Ni marine atmosphere corrosion-resisting steel, and Ni contains
Amount reduces by 50% or more, steel plate weatherability alloy index V：1.4 left and right.
A kind of high tenacity corrosion resistant submerged arc metal powder core solder wire, i.e., mating 1Ni marine atmosphere corrosion-resisting steel use, wlding Ni
Content 1.5% or so, weatherability alloy index V：More than 1.2.1Ni submerged arc metal powder core solder wire weld metal surveys V value 1.3
Left and right.Product of the present invention weld metal corrosion potential is higher than 1Ni marine atmosphere corrosion-resisting steel 10mV or so, in marine atmosphere ring
The corrosion tendency of weld seam is advantageously reduced under border.
The welding wire that mating 1Ni marine atmosphere corrosion-resisting steel uses, wlding Ni content 1.5% or so, weatherability alloy index
V：More than 1.2.1Ni submerged arc metal powder core solder wire weld metal surveys V value 1.3 or so.
Therefore, high tenacity corrosion resistant submerged arc metal can be matched with the welding of 1Ni marine atmosphere corrosion-resisting steel by researching and developing one kind
Flux cored wire seems very necessary.
Summary of the invention
In view of this, the present invention is directed to propose a kind of high tenacity corrosion resistant submerged arc metal powder core solder wire, to overcome existing skill
The defect of art, on the basis of weatherability alloy index V can reach 1.2 or more, deposited metal tensile strength >=500MPa, surrender is by force
Degree >=400MPa, elongation percentage >=22%, -40 DEG C of impact flexibility >=80J, deposited metal diffusible hydrogen content≤5ml/100g, and
With good cracking resistance, can mating 1Ni marine atmosphere corrosion-resisting steel, make for the lower area of sea atmosphere corrosion degree
With simultaneously because the reduction of steel plate and wlding Ni content, can be greatly lowered engineering cost.
In order to achieve the above objectives, the technical proposal of the invention is realized in this way：
A kind of high tenacity corrosion resistant submerged arc metal powder core solder wire, including crust and medicine core；The medicine core includes following weight
The each component of part：5~20 parts of silicomangan, 10~30 parts of manganese metal, 5~20 parts of magnesium powder, 40~60 parts of nickel powder, chromium powder 10~30
Part, 1~5 part of molybdenum powder, 10~30 parts of copper powder, 5~20 parts of ferrotianium, 1~5 part of ferro-boron, 1~5 part of rare earth ferrosilicon, iron powder 850~900
Part.
Preferably, the medicine core includes each component of following parts by weight：10~15 parts of silicomangan, manganese metal 15~22
Part, 10~16 parts of magnesium powder, 45~55 parts of nickel powder, 15~25 parts of chromium powder, 2~4 parts of molybdenum powder, 15~25 parts of copper powder, ferrotianium 10~15
Part, 2.5~4 parts of ferro-boron, 2~3.5 parts of rare earth ferrosilicon, 865~885 parts of iron powder.
Preferably, the nickel powder, molybdenum powder, chromium powder, copper powder total weight number are not less than 70 parts.
Preferably, the weight fraction ratio of nickel powder and copper powder is 2~3：1.
Preferably, the mass fraction in nickel powder containing nickel is 99.5%；Mass fraction in chromium powder containing chromium is 99.5%；
Mass fraction in molybdenum powder containing molybdenum is 99.5%；Mass fraction in copper powder containing copper is 99.5%.
Preferably, weatherability alloy index v >=1.2 of flux cored wire；
V=1/ { (1.0-0.16 [C]) × (1.05-0.05 [Si]) × (1.04-0.016 [Mn]) × (1.0-0.5 [P])
×(1.0+1.9[S])×(1.0-0.10[Cu])×(1.0-0.12[Ni])×(1.0-0.3[Mo])×(1.0-1.7
[Ti]) }, wherein [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Mo] and [Ti].
Preferably, welding wire raw material is SPCC-SD cold-rolled low carbon steel steel band.
Preferably, gage of wire 4.0mm；Medicine core accounts for the 30%-40% of welding wire total weight.
High tenacity corrosion resistant submerged arc metal powder core solder wire of the present invention, the action principle of medicine core each component are as follows：
Ferro-boron：Boron can inhibit the generation of crystal boundary pro-eutectoid ferrite, refine crystal grain, increase grain boundary area, improve weld seam
Intensity and toughness.But low temperature impact properties reduce afterwards as the increase of boron mass fraction first rises.Micro boron is added may be used also
Phase transition rate when reducing cooling, to significantly improve the harden ability of steel, boron can also improve the ductility of steel.
Molybdenum powder：Crystal grain can be refined, grain boundary area is increased, to improve strength and toughness, improves the removability of slag, it is steady to improve electric arc
It is qualitative, but the too high levels of molybdenum can be such that toughness deteriorates.Molybdenum can also improve the corrosion resistance of deposited metal, especially resistance to maritime
The corrosion of weather；Structural transformation rate can also be reduced, deposited metal harden ability is improved；But if the too high levels of molybdenum, by
It is dramatically increased in its harden ability, martensitic structure occurs in postwelding, deteriorates toughness, increases tissue brittleness.
Chromium powder：Chromium can be improved the intensity of steel, increase stabilization of austenite, improve harden ability.Cooperate with Ni and improves
Anti-oxidant and heat resistance, while improving corrosion resistance.Excessive chromium can promote crystal grain to grow up, and the brittleness of steel is caused to increase.
Ferrosilicon：Silicon is deoxidier, can refine molten drop, improves arc stability, improves the burn-off rate of welding wire, is improved molten
The yield point and tensile strength of metallisation.But too high levels will lead to that intensity is excessively high, toughness decline.
Nickel powder：Nickel can reduce the ductile-brittle transition temperature of weld metal, under certain condition, with the increase of nickel, intensity
It improves, low-temperature impact toughness improves significantly, while nickel has higher corrosion resistance to soda acid, at high temperature
With antirust and the advantages such as heat-resisting；Nickel content, which increases, adds up to index increase effect obvious weatherability, and it is resistance to can to effectively improve steel plate
Corrosive power, but nickel content is excessively high, will increase the hot cracking tendency of deposited metal.Ni element is a kind of more stable ground alloy
Element, Ni, which is added, can increase the self-corrosion point of steel, to improve the stability of steel.Metal is exposed to quilt in naval air environment
Corrosion is mainly due to the Cl in marine atmosphere—Ion is dissolved in the liquid film of metal surface formation and causes corrosion of metal, therefore
MoO is given full play in saliferous particle atmospheric environment4 2-The effect of ion, rusty scale must be fine and close, and specific surface area also should be more
Greatly.Since Ni is mainly present in spinel oxide with oxides, divalent, interior rusty scale consistency is improved, therefore adds alloy member
Plain Ni can form fine and close rusty scale to give full play to MoO4 2-It is resistance in naval air environment to significantly improve steel for the effect of ion
Atmospheric corrosion performance.
Copper powder：Copper can improve the intensity and toughness of deposited metal, especially raising atmospheric corrosion resistance.The disadvantage is that in heat
It is easy to produce when processing hot-short.Copper is also the essential element in weatherability alloy index, to the corrosion resistance efficiency for improving steel plate
Fruit is obvious.
Ferrotianium：Titanium is strong oxidizer.It can promote the formation of acicular ferrite, refine crystal grain, increase grain boundary area, improve
The mechanical property of material.And there is good fluxing effect.Titanium elements can also form stable carbide, avoid analysing on crystal boundary
The carbide of richness Cr out, therefore addition titanium elements can also prevent intercrystalline corrosion.
Iron powder：Be conducive to medicinal powder to be uniformly distributed, the deposition efficiency and arc stability of welding can be improved.
Silicomangan：Mainly deoxidier can reduce the oxygen content of weld metal.When its additional amount is less than 5%, deoxidation becomes
Difference, impact flexibility are deteriorated；Additional amount is more than 20%, then intensity is excessively high, and impact flexibility reduces.
The present invention also provides high tenacity corrosion resistant submerged arc metal powder core solder wires as described above in tensile strength 500MPa
Application in the bridge steel welding of the grade performance requirement of resistance to sea atmosphere corrosion.
It is big in the resistance to ocean mating 1Ni that the present invention also provides high tenacity corrosion resistant submerged arc metal powder core solder wires as described above
Application in the welding of gas corrosion steel.
Compared with the existing technology, high tenacity corrosion resistant submerged arc metal powder core solder wire of the present invention has the advantage that：
High tenacity corrosion resistant submerged arc metal powder core solder wire of the present invention, deposited metal good mechanical performance, weatherability
On the basis of alloy index V can reach 1.2 or more, deposited metal tensile strength >=500MPa, yield strength >=400MPa extends
Rate >=22%, -40 DEG C of impact flexibility >=80J, deposited metal diffusible hydrogen content≤5ml/100g, and there is good crack resistance
Energy.Such welding wire can be used for mating 1Ni marine atmosphere corrosion-resisting steel and be used for the bridge construction of resistance to sea atmosphere corrosion, big with Yu Haiyang
The lower area of gas corrosion degree uses, and due to the reduction of steel plate and wlding Ni content, engineering cost can be greatly lowered, while resistance to
Sea atmosphere corrosion bridge can exempt coating process, have environment-friendly advantage, and can retrieve periodic maintenance expense, overall cost
It is low.
High tenacity corrosion resistant submerged arc metal powder core solder wire of the present invention can be applied to 500MPa grades of bridge steel welding
In.
High tenacity corrosion resistant submerged arc metal powder core solder wire of the present invention, it is resistance to that weld metal corrosion potential is higher than 1Ni
Sea atmosphere corrosion steel 10mV or so, advantageously reduces the corrosion tendency of weld seam under naval air environment.
Specific embodiment
In addition to being defined, technical term used in following embodiment has universal with those skilled in the art of the invention
The identical meanings of understanding.Test reagent used in following embodiment is unless otherwise specified conventional biochemical reagent；It is described
Experimental method is unless otherwise specified conventional method.
Below with reference to embodiment, the present invention will be described in detail.
Embodiment 1
A kind of high tenacity corrosion resistant submerged arc metal powder core solder wire, including crust and medicine core；The medicine core includes following weight
The component of number, 5 parts of silicomangan, 30 parts of manganese metal, 15 parts of magnesium powder, 40 parts of nickel powder, 20 parts of chromium powder, 2 parts of molybdenum powder, copper powder 15
Part, 16 parts of ferrotianium, 2 parts of ferro-boron, 2 parts of rare earth ferrosilicon, 850 parts of iron powder.
The ratio that the medicine core accounts for welding wire total weight is 38%.
Mass fraction in nickel powder containing nickel is 99.5%；Mass fraction in chromium powder containing chromium is 99.5%；In molybdenum powder
Mass fraction containing molybdenum is 99.5%；Mass fraction in copper powder containing copper is 99.5%.
Welding wire raw material (namely crust) is SPCC-SD cold-rolled low carbon steel steel band, using conventional medicine core Transition-metal Alloys mode and
General medicinal powder specification and the manufacture of flux-cored wire production technology, gage of wire 4.0mm.
Flux-cored wire deposited metal performance：(101 solder flux of cooperation sintering)
Weatherability alloy index V：
V=1/ { (1.0-0.16 [C]) × (1.05-0.05 [Si]) × (1.04-0.016 [Mn]) × (1.0-0.5 [P])
×(1.0+1.9[S])×(1.0-0.10[Cu])×(1.0-0.12[Ni])×(1.0-0.3[Mo])×(1.0-1.7
[Ti]) }, wherein [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Mo] and [Ti] respectively represent C, Si, Mn, P, S, Cu,
The deposited metal weight percent of Ni, Mo and Ti.
The weatherability being calculated adds up to index V：1.28.Corrosion potential is higher than 1Ni marine atmosphere corrosion-resisting steel 9mV.
" weatherability alloy index " is quoted from standard JIS Z3320-2012《Atmospheric corrosion resistant steel gas shield and self-shield gold
Belong to arc welding flux cored wire》.What the index reflected is the index of metal material atmospheric corrosion resistance, and V value is higher, and resistance to atmosphere is rotten
Corrosion can be more excellent.
Embodiment 2
A kind of high tenacity corrosion resistant submerged arc metal powder core solder wire, including crust and medicine core；The medicine core includes following weight
The component of number, 10 parts of silicomangan, 20 parts of manganese metal, 10 parts of magnesium powder, 50 parts of nickel powder, 15 parts of chromium powder, 3 parts of molybdenum powder, copper powder 20
Part, 12 parts of ferrotianium, 3 parts of ferro-boron, 3 parts of rare earth ferrosilicon, 870 parts of iron powder.
The ratio that the medicine core accounts for welding wire total weight is 35%.
Mass fraction in nickel powder containing nickel is 99.5%；Mass fraction in chromium powder containing chromium is 99.5%；In molybdenum powder
Mass fraction containing molybdenum is 99.5%；Mass fraction in copper powder containing copper is 99.5%.
Welding wire raw material (namely crust) is SPCC-SD cold-rolled low carbon steel steel band, using conventional medicine core Transition-metal Alloys mode and
General medicinal powder specification and the manufacture of flux-cored wire production technology, gage of wire 4.0mm.
Flux-cored wire deposited metal performance：(101 solder flux of cooperation sintering)
Weatherability alloy index V：
V=1/ { (1.0-0.16 [C]) × (1.05-0.05 [Si]) × (1.04-0.016 [Mn]) × (1.0-0.5 [P])
×(1.0+1.9[S])×(1.0-0.10[Cu])×(1.0-0.12[Ni])×(1.0-0.3[Mo])×(1.0-1.7
[Ti]) }, wherein [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Mo] and [Ti] respectively represent C, Si, Mn, P, S, Cu,
The deposited metal weight percent of Ni, Mo and Ti.
The weatherability alloy index V being calculated：1.32.Corrosion potential is higher than 1Ni marine atmosphere corrosion-resisting steel 10mV.
Embodiment 3
A kind of high tenacity corrosion resistant submerged arc metal powder core solder wire, including crust and medicine core；The medicine core includes following weight
The component of number, 20 parts of silicomangan, 10 parts of manganese metal, 5 parts of magnesium powder, 60 parts of nickel powder, 11 parts of chromium powder, 4 parts of molybdenum powder, copper powder 25
Part, 8 parts of ferrotianium, 4 parts of ferro-boron, 4 parts of rare earth ferrosilicon, 850 parts of iron powder.
The ratio that the medicine core accounts for welding wire total weight is 32%.
Mass fraction in nickel powder containing nickel is 99.5%；Mass fraction in chromium powder containing chromium is 99.5%；In molybdenum powder
Mass fraction containing molybdenum is 99.5%；Mass fraction in copper powder containing copper is 99.5%.
Welding wire raw material (namely crust) is SPCC-SD cold-rolled low carbon steel steel band, using conventional medicine core Transition-metal Alloys mode and
General medicinal powder specification and the manufacture of flux-cored wire production technology, gage of wire 4.0mm.
Flux-cored wire deposited metal performance：(101 solder flux of cooperation sintering)
Weatherability alloy index V：
V=1/ { (1.0-0.16 [C]) × (1.05-0.05 [Si]) × (1.04-0.016 [Mn]) × (1.0-0.5 [P])
×(1.0+1.9[S])×(1.0-0.10[Cu])×(1.0-0.12[Ni])×(1.0-0.3[Mo])×(1.0-1.7
[Ti]) }, wherein [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Mo] and [Ti] respectively represent C, Si, Mn, P, S, Cu,
The deposited metal weight percent of Ni, Mo and Ti.
The weatherability alloy index V being calculated：1.37.Corrosion potential is higher than 1Ni marine atmosphere corrosion-resisting steel 12mV.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of high tenacity corrosion resistant submerged arc metal powder core solder wire, it is characterised in that：Including crust and medicine core；The medicine core includes
The each component of following parts by weight：5~20 parts of silicomangan, 10~30 parts of manganese metal, 5~20 parts of magnesium powder, 40~60 parts of nickel powder, chromium
10~30 parts of powder, 1~5 part of molybdenum powder, 10~30 parts of copper powder, 5~20 parts of ferrotianium, 1~5 part of ferro-boron, 1~5 part of rare earth ferrosilicon, iron powder
850~900 parts.
2. high tenacity corrosion resistant submerged arc metal powder core solder wire according to claim 1, it is characterised in that：The medicine core includes
The each component of following parts by weight：10~15 parts of silicomangan, 15~22 parts of manganese metal, 10~16 parts of magnesium powder, 45~55 parts of nickel powder,
15~25 parts of chromium powder, 2~4 parts of molybdenum powder, 15~25 parts of copper powder, 10~15 parts of ferrotianium, 2.5~4 parts of ferro-boron, rare earth ferrosilicon 2~3.5
Part, 865~885 parts of iron powder.
3. high tenacity corrosion resistant submerged arc metal powder core solder wire according to claim 1 or 2, it is characterised in that：The nickel powder,
Molybdenum powder, chromium powder, copper powder total weight number are not less than 70 parts.
4. high tenacity corrosion resistant submerged arc metal powder core solder wire according to claim 1 or 2, it is characterised in that：Nickel powder and copper
The weight fraction ratio of powder is 2~3：1.
5. high tenacity corrosion resistant submerged arc metal powder core solder wire according to claim 1 or 2, it is characterised in that：Contain in nickel powder
The mass fraction for having nickel is 99.5%；Mass fraction in chromium powder containing chromium is 99.5%；Contain the mass fraction of molybdenum in molybdenum powder
It is 99.5%；Mass fraction in copper powder containing copper is 99.5%.
6. high tenacity corrosion resistant submerged arc metal powder core solder wire according to claim 1, it is characterised in that：Flux cored wire it is resistance to
Time property alloy index v >=1.2；
V=1/ (1.0-0.16 [C]) × (1.05-0.05 [Si]) × (1.04-0.016 [Mn]) × (1.0-0.5 [P]) ×
(1.0+1.9 [S]) × (1.0-0.10 [Cu]) × (1.0-0.12 [Ni]) × (1.0-0.3 [Mo]) × (1.0-1.7 [Ti]) },
Wherein [C], [Si], [Mn], [P], [S], [Cu], [Ni], [Mo] and [Ti].
7. high tenacity corrosion resistant submerged arc metal powder core solder wire according to claim 1, it is characterised in that：Welding wire raw material is
SPCC-SD cold-rolled low carbon steel steel band.
8. high tenacity corrosion resistant submerged arc metal powder core solder wire according to claim 1, it is characterised in that：Gage of wire is
4.0mm；Medicine core accounts for the 30%-40% of welding wire total weight.
9. according to claim 1 to high tenacity corrosion resistant submerged arc metal powder core solder wire described in 8 any one in tensile strength
Application in the bridge steel welding of the 500MPa grades of performance requirements of resistance to sea atmosphere corrosion.
10. resistance in mating 1Ni to high tenacity corrosion resistant submerged arc metal powder core solder wire described in 8 any one according to claim 1
Application in the welding of sea atmosphere corrosion steel.
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| CN109623196A (en) * | 2018-12-27 | 2019-04-16 | 天津市永昌焊丝有限公司 | A kind of weathering steel high tenacity titania-type flux-cored welding wire |
| CN110125572A (en) * | 2019-05-30 | 2019-08-16 | 洛阳双瑞特种合金材料有限公司 | It is a kind of can post weld heat treatment seamless submerged arc flux-cored wire |
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| CN110508971A (en) * | 2019-09-12 | 2019-11-29 | 天津市永昌焊丝有限公司 | A kind of high-strength and high-ductility metal powder-cored wire |
| CN111218613A (en) * | 2020-01-08 | 2020-06-02 | 河北华进贸易有限公司 | Marine weather-proof bridge steel plate |
| CN112077476A (en) * | 2020-09-09 | 2020-12-15 | 郑州大学 | Matched flux-cored wire for fusion welding of seamless copper pipe for medical gas and vacuum |
| CN112077475A (en) * | 2020-09-09 | 2020-12-15 | 郑州大学 | Flux-cored wire for NCu30 nickel alloy seamless pipe welding for pressure-bearing equipment |
| CN114248039A (en) * | 2021-12-20 | 2022-03-29 | 武汉铁锚焊接材料股份有限公司 | High-strength anti-crack metal powder core type submerged arc welding wire for engineering machinery and application |
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