CN114871633A - Welding wire for laser welding of aluminum-silicon pre-coated steel plate, aluminum-silicon pre-coated steel plate laser tailor-welded component and production method thereof - Google Patents
Welding wire for laser welding of aluminum-silicon pre-coated steel plate, aluminum-silicon pre-coated steel plate laser tailor-welded component and production method thereof Download PDFInfo
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- CN114871633A CN114871633A CN202210625063.0A CN202210625063A CN114871633A CN 114871633 A CN114871633 A CN 114871633A CN 202210625063 A CN202210625063 A CN 202210625063A CN 114871633 A CN114871633 A CN 114871633A
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- 238000003466 welding Methods 0.000 title claims abstract description 92
- CSDREXVUYHZDNP-UHFFFAOYSA-N alumanylidynesilicon Chemical compound [Al].[Si] CSDREXVUYHZDNP-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 75
- 239000010959 steel Substances 0.000 title claims abstract description 75
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 14
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 12
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 11
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 11
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 11
- 229910052758 niobium Inorganic materials 0.000 claims abstract description 9
- 150000003839 salts Chemical class 0.000 claims description 12
- 239000007921 spray Substances 0.000 claims description 12
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 230000007935 neutral effect Effects 0.000 claims description 8
- 229910000734 martensite Inorganic materials 0.000 claims description 7
- 239000000758 substrate Substances 0.000 claims description 6
- 238000007747 plating Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 239000011247 coating layer Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 239000000945 filler Substances 0.000 abstract description 3
- 229910052742 iron Inorganic materials 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 16
- 239000011572 manganese Substances 0.000 description 11
- 239000010955 niobium Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 238000009864 tensile test Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910001566 austenite Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000008199 coating composition Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 229910000765 intermetallic Inorganic materials 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- 229910018507 Al—Ni Inorganic materials 0.000 description 1
- 229910000797 Ultra-high-strength steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QQHSIRTYSFLSRM-UHFFFAOYSA-N alumanylidynechromium Chemical compound [Al].[Cr] QQHSIRTYSFLSRM-UHFFFAOYSA-N 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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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
-
- 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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Engineering (AREA)
- Plasma & Fusion (AREA)
- Coating With Molten Metal (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a welding wire for welding an aluminum-silicon pre-plated steel plate, an aluminum-silicon pre-plated steel plate laser tailor-welding component and a production method thereof, wherein the welding wire comprises the following components in percentage by weight: c: 0.10-0.22%, Si: 0.20 to 0.50%, Mn: 2.0-3.5%, Ni: 3.0-7.0%, Cr: 2.0-3.0%, Nb: 0.020-0.030 percent of Fe and the balance of inevitable impurities, and performing laser tailor-welding on an aluminum-silicon pre-plated steel plate by adopting the welding wire for laser welding of the aluminum-silicon pre-plated steel plate, and performing hot forming on a blank subjected to tailor-welding by adopting a laser filler wire welding method, so that the joint of the laser tailor-welded component of the obtained aluminum-silicon pre-plated steel plate has excellent mechanical properties, the performance requirement of a hot-formed laser tailor-welded plate is met, and meanwhile, the corrosion resistance of a welding seam is remarkably improved.
Description
Technical Field
The invention belongs to the technical field of pre-plated steel plate welding, and particularly relates to a welding wire for welding an aluminum-silicon pre-plated steel plate, an aluminum-silicon pre-plated steel plate laser tailor-welding component and a production method thereof.
Background
In recent years, along with the enforcement of more stringent automobile emission laws and regulations, automobile manufacturers need to develop and produce automobile products with more energy conservation and emission reduction. The light weight of the automobile is one of the most effective ways for realizing energy conservation and emission reduction, and the emission of the fuel oil vehicle can be correspondingly reduced by 5-10% when the weight of the whole automobile is reduced by 10% in general. In order to realize the light weight of the automobile body and simultaneously not reduce the safety of the automobile, advanced high-strength automobile parts are widely applied to the manufacture of the automobile body at present. The cold-forming ultrahigh-strength steel with the tensile strength of over 1000MPa is limited in application to automobile body safety parts due to the problems of high resilience, insufficient forming size precision, serious abrasion to a stamping die and the like in the stamping process. The hot stamping forming technology has the advantages of high part size precision, good forming performance, high strength level, small tonnage required by stamping and the like. At present, 1500 MPa-level bare plates and aluminum-silicon pre-plated layer hot-formed parts are widely applied to automobile bodies, such as safety parts of A columns, B columns, C columns, door frame reinforcing beams, front wall cross beams, left and right longitudinal beams, automobile door bumpers and the like. With the further improvement of light weight and safety in automobile factories, currently, 1800 MPa-grade hot forming steel has been mass-produced and applied to parts such as door bumpers, front and rear impact beams and the like of middle and high-end automobile models.
Although resistance spot welding has the advantages of high production efficiency, easy realization of automation and the like, the problems of narrow weldability window, poor electrode service life and the like exist in the welding of aluminum-silicon pre-plating layer hot forming steel, and in addition, the welding point has an obvious softening area and is easy to have brittle and hard tissues, and the joint performance cannot be ensured.
With the requirements on collision performance of the vehicle body and the improvement of NVH level, the laser tailor-welding connection method of the aluminum-silicon pre-plated steel plate is widely concerned. However, in the laser tailor-welding process of the aluminum-silicon pre-plated layer plate, the plated metal is melted and enters the welding line, Al element and Fe in the welding line easily form a brittle Fe-Al compound, meanwhile, Al element enrichment enables the metal in the welding area not to be completely austenitized, a martensite and ferrite dual-phase structure is formed after forming, and the joint strength is reduced.
Disclosure of Invention
The invention aims to provide a welding wire for laser welding of an aluminum-silicon pre-plated steel plate, which can be used for obtaining a tailor-welded component with excellent mechanical property and corrosion resistance by a welding method of laser wire filling without pretreating an aluminum-silicon plating layer of a welding area.
The invention also aims to provide an aluminum-silicon pre-plated steel plate laser tailor-welded component and a production method thereof, wherein the aluminum-silicon pre-plated steel plate is subjected to laser tailor-welding by adopting the welding wire for laser welding of the aluminum-silicon pre-plated steel plate and a laser filler wire welding method, and the tailor-welded blank is subjected to hot forming to obtain the aluminum-silicon pre-plated steel plate. The joint of the laser tailor-welded component of the aluminum-silicon pre-plated steel plate obtained in the way has excellent mechanical performance, meets the performance requirement of a hot-formed laser tailor-welded plate, and meanwhile, the corrosion resistance of a welding seam is obviously improved.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the welding wire for the laser welding of the aluminum-silicon pre-coated steel plate comprises the following components in percentage by weight: c: 0.10-0.22%, Si: 0.20-0.50%, Mn: 2.0-3.5%, Ni: 3.0-7.0%, Cr: 2.0-3.0%, Nb: 0.020 to 0.030%, and the balance of Fe and inevitable impurities.
When the total coating weight t of the aluminum-silicon precoated steel plate is 100g/m 2 ＞t≥20g/m 2 The welding wire comprises the following components in percentage by weight: c: 0.18-0.22%, Si: 0.20 to 0.50%, Mn: 2.0-2.5%, Ni: 3.0-5.0%, Cr: 2.0-2.5%, Nb: 0.020-0.030%, and the balance of Fe and inevitable impurities.
When the total coating weight t of the aluminum-silicon precoated steel plate is 200g/m 2 ＞t≥100g/m 2 The welding wire comprises the following components in percentage by weight: c: 0.10-0.15%, Si: 0.20 to 0.50%, Mn: 2.5-3.5%, Ni: 4.0-7.0%, Cr: 2.5-3.0%, Nb: 0.020 to 0.030%, and the balance of Fe and inevitable impurities.
The coating of the aluminum-silicon pre-coated steel plate comprises the following components in percentage by weight: fe: less than or equal to 10 percent, Si: 5-20%, and the balance of Al and inevitable impurities.
The base plate of the aluminum-silicon pre-plated steel plate comprises the following components in percentage by weight: c: 0.10 to 0.50, Si: 0.10 to 0.80, Mn: 0.50 to 1.50, P: less than or equal to 0.05, S: less than or equal to 0.05, Al: less than or equal to 0.10, Cr: 0.10 to 0.80, Mo: less than or equal to 0.5, B: less than or equal to 0.005 and N: not more than 0.01, Nb + V + Ti: 0.04-0.10, and the balance of Fe and inevitable impurities.
The thickness of the substrate of the aluminum-silicon pre-plated steel plate is 1.0mm-2.5 mm.
The invention also provides a production method of the laser tailor-welded component of the aluminum-silicon pre-plated steel plate, which comprises the following steps: the aluminum-silicon pre-plated steel plate is subjected to laser tailor-welding by adopting the welding wire for laser welding of the aluminum-silicon pre-plated steel plate, and the blank subjected to tailor-welding is heated at 880-940 ℃ for 180-480 s and quenched at the cooling speed of more than 30 ℃/s.
The invention also provides an aluminum-silicon pre-plated steel plate laser tailor-welded component which is produced by adopting the production method.
The structure of the welding area of the laser tailor-welded component of the aluminum-silicon pre-plated steel plate is an all-martensite structure.
The tensile strength of the aluminum-silicon pre-plated steel plate laser tailor-welded component is more than or equal to 1580MPa, the elongation is more than or equal to 6.5%, and the tensile fracture position is in the parent metal; the welding seam has no red rust after neutral salt spray test.
The welding wire for laser welding of the aluminum-silicon pre-plated steel plate provided by the invention comprises the following components in action and control:
c: carbon is a solid solution strengthening element, and the strength of the welding seam can be effectively ensured. However, since too high a carbon content causes brittle martensite to be generated and weld properties to be deteriorated, the present invention controls the carbon content to be in the range of 0.10 to 0.22%.
Mn: manganese is an austenite stabilizing element, the content of manganese is increased within a certain range, the austenitizing temperature of a weld zone in the hot stamping process can be reduced, the formation of high-temperature ferrite is inhibited, the weld is facilitated to obtain a full martensite structure, and the content of manganese is controlled within the range of 2.0-3.5%.
Ni, Cr, Si: cr, Ni element and Al element in the coating are easy to generate high-toughness Al-Ni and Al-Cr intermetallic compounds, so that the formation of brittle Fe-Al intermetallic compounds is avoided, and the influence of the Al element on austenite phase transformation is indirectly prevented; meanwhile, Cr and Si are preferential oxidation elements, and continuous SiO can be formed in the welding process 2 And Cr 2 O 3 The invention has the advantages that the Ni content is controlled to be 3.0-7.0%, the Cr content is controlled to be 2.0-3.0%, the Si content is controlled to be 0.20-0.50%, and if the content is lower than the range, good laser welding performance cannot be realized; above the above range, the steel properties are deteriorated, the welded joint becomes brittle, and the excessive alloy components are not economical.
Nb: the niobium element can play a role in grain refinement and precipitation strengthening in the welding seam, the strength and the toughness can be improved, and the Nb content range is 0.020-0.030%.
Compared with the prior art, the welding wire for laser welding of the aluminum-silicon pre-plated steel plate provided by the invention has the advantages that the aluminum-silicon plating layer of the welding area is not required to be pretreated when in use, the tailor-welded component with excellent mechanical property and corrosion resistance can be obtained by utilizing a welding method of laser wire filling, the structure of the welding area after thermoforming is full martensite, the fracture area in a tensile test is not in the welding seam area, the joint has excellent mechanical property, and the performance requirement of the thermoformed laser tailor-welded plate is met. Meanwhile, according to the ISO9227 neutral salt spray test standard, the weld joint neutral salt spray test result has no red rust, and the weld joint corrosion resistance is obviously improved.
Drawings
FIG. 1 shows the salt spray test results of the weld joint in example 1;
FIG. 2 is a salt spray test result of the welded joint in comparative example 1;
FIG. 3 is the results of the salt spray test of the weld joint in comparative example 2;
FIG. 4 shows the results of the salt spray test of the weld joint in comparative example 3;
FIG. 5 is a metallographic structure diagram of a welded joint in example 1;
FIG. 6 is a metallographic structure diagram of a welded joint in comparative example 1;
FIG. 7 is a metallographic structure diagram of a welded joint in comparative example 2;
fig. 8 is a metallographic structure diagram of a welded joint in comparative example 3.
Detailed Description
A welding wire for laser welding of an aluminum-silicon pre-coated steel plate is provided, when the total coating weight t of the aluminum-silicon pre-coated steel plate is 100g/m 2 ＞t≥20g/m 2 The welding wire comprises the following components in percentage by weight: c: 0.18-0.22%, Si: 0.20 to 0.50%, Mn: 2.0-2.5%, Ni: 3.0-5.0%, Cr: 2.0-2.5%, Nb: 0.020 to 0.030%, and the balance of Fe and inevitable impurities.
When the total coating weight t of the aluminum-silicon precoated steel plate is 200g/m 2 ＞t≥100g/m 2 The welding wire comprises the following components in percentage by weight: c: 0.10-0.15%, Si: 0.20 to 0.50%, Mn: 2.5-3.5%, Ni: 4.0-7.0%, Cr: 2.5-3.0%, Nb: 0.020 to 0.030%, and the balance of Fe and inevitable impurities.
The coating of the aluminum-silicon pre-coated steel plate comprises the following components in percentage by weight: fe: less than or equal to 10 percent, Si: 5-20%, and the balance of Al and inevitable impurities.
The base plate of the aluminum-silicon pre-plated steel plate comprises the following components in percentage by weight: c: 0.10 to 0.50, Si: 0.10 to 0.80, Mn: 0.50 to 1.50, P: less than or equal to 0.05, S: less than or equal to 0.05, Al: less than or equal to 0.10, Cr: 0.10 to 0.80, Mo: less than or equal to 0.5, B: less than or equal to 0.005 and N: not more than 0.01, Nb + V + Ti: 0.04 to 0.10, and the balance of Fe and inevitable impurities.
The thickness of the substrate of the aluminum-silicon pre-plated steel plate is 1.0mm-2.5 mm.
The invention also provides a production method of the laser tailor-welded component of the aluminum-silicon pre-plated steel plate, which comprises the following steps: the aluminum-silicon pre-plated steel plate is subjected to laser tailor-welding by adopting the welding wire for laser welding of the aluminum-silicon pre-plated steel plate, and the blank subjected to tailor-welding is heated at 880-940 ℃ for 180-480 s and quenched at the cooling speed of more than 30 ℃/s.
The present invention will be described in detail with reference to examples.
The compositions and weight percentages of the substrates of the aluminum-silicon precoated steel sheets of examples 1 to 4 and comparative examples 1 to 2 are shown in table 1.
TABLE 1 composition and weight percentage (wt%) of substrate of aluminum-silicon precoated steel sheet
The production steps and the process of each aluminum-silicon pre-plated steel plate are the same, and the aluminum-silicon pre-plated steel plate is obtained by continuous casting, hot rolling, acid pickling and cold rolling, and hot dipping of aluminum silicon.
The coating compositions and weight percentages of the aluminum-silicon precoated steel sheets of examples 1 to 4 and comparative examples 1 to 2 are shown in table 2.
TABLE 2 coating composition and weight percentage (wt%) of aluminum-silicon precoated steel sheet
| Fe | Si | Balance of |
| 2.1 | 8.9 | Al and inevitable impurities |
The aluminum-silicon pre-plated steel plates in the examples and the comparative examples are subjected to laser tailor welding by a laser filler wire welding method, and blanks subjected to tailor welding are subjected to hot forming to prepare the aluminum-silicon pre-plated steel plate laser tailor-welded component.
The substrate thickness, coating weight and hot forming process parameters of the laser tailor-welded members of the aluminum-silicon precoated steel sheets in each example and comparative example are shown in table 3.
TABLE 3 thermoforming Process parameters
| Thickness of base plate/(mm) | Coating weight/(g/m) 2 ) | Heating temperature/. degree.C | Heating time/s | Cooling Rate/. degree.C/s | |
| Example 1 | 1.2 | 40 | 930 | 240 | 50 |
| Example 2 | 2.0 | 70 | 930 | 300 | 50 |
| Example 3 | 1.0 | 120 | 930 | 210 | 50 |
| Example 4 | 1.8 | 160 | 930 | 300 | 50 |
| Comparative example 1 | 1.2 | 40 | 930 | 240 | 50 |
| Comparative example 2 | 1.8 | 160 | 930 | 300 | 50 |
| Comparative example 3 | 2.0 | 70 | 930 | 300 | 50 |
| Comparative example 4 | 1.8 | 160 | 930 | 300 | 50 |
The components and weight percentages of the welding wires used for welding the laser tailor-welded members of the aluminum-silicon precoated steel sheets in the examples and comparative examples are shown in table 4.
TABLE 4 welding wire composition and weight percent (wt%)
And cutting out a weld joint tensile test sample, a weld joint metallographic test sample and a weld joint neutral salt spray test sample subjected to hot forming in each embodiment and comparative example, and performing a weld joint tensile test, a weld joint metallographic observation and a weld joint neutral salt spray test according to GB/T2652 standards and ISO9227 standards respectively, wherein test results are shown in Table 5.
TABLE 5
In embodiments 1 to 4, by using the method for producing the laser tailor-welded component of the aluminum-silicon pre-plated steel plate, provided by the invention, after hot forming, a weld joint structure is full martensite, a fracture area in a tensile test is not in a weld joint area, and a joint has excellent mechanical properties and meets the performance requirements of a hot-formed laser tailor-welded plate. Meanwhile, according to the ISO9227 neutral salt spray test standard, the weld joint neutral salt spray test result has no red rust, and the weld joint corrosion resistance is obviously improved.
The above detailed description of the welding wire for welding the aluminum-silicon pre-plated steel sheet, the aluminum-silicon pre-plated steel sheet laser tailor-welded structure and the method for manufacturing the same with reference to the embodiments are illustrative and not restrictive, and several embodiments can be cited within the limits thereof, so that changes and modifications without departing from the general concept of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. The welding wire for the laser welding of the aluminum-silicon pre-plated steel plate is characterized by comprising the following components in percentage by weight: c: 0.10-0.22%, Si: 0.20 to 0.50%, Mn: 2.0-3.5%, Ni: 3.0-7.0%, Cr: 2.0-3.0%, Nb: 0.020 to 0.030%, and the balance of Fe and inevitable impurities.
2. The welding wire for laser welding of aluminum-silicon precoated steel sheet according to claim 1, wherein when the total coating weight t of the aluminum-silicon precoated steel sheet is 100g/m 2 ＞t≥20g/m 2 The welding wire comprises the following components in percentage by weight: c: 0.18-0.22%, Si: 0.20 to 0.50%, Mn: 2.0-2.5%, Ni: 3.0-5.0%, Cr: 2.0-2.5%, Nb: 0.020 to 0.030%, and the balance of Fe and inevitable impurities.
3. The welding wire for laser welding of aluminum-silicon precoated steel sheet according to claim 1, wherein the total coating weight t of the aluminum-silicon precoated steel sheet is 200g/m 2 ＞t≥100g/m 2 The welding wire comprises the following components in percentage by weight: c: 0.10-0.15%, Si: 0.20 to 0.50%, Mn: 2.5-3.5%, Ni: 4.0-7.0%, Cr: 2.5-3.0%, Nb: 0.020 to 0.030%, and the balance of Fe and inevitable impurities.
4. The welding wire for laser welding of an aluminum-silicon precoated steel sheet according to claim 1, wherein the coating layer of said aluminum-silicon precoated steel sheet comprises the following components in percentage by weight: fe: less than or equal to 10 percent, Si: 5-20%, and the balance of Al and inevitable impurities.
5. The welding wire for laser welding of an aluminum-silicon precoated steel sheet according to claim 1, wherein the base sheet of the aluminum-silicon precoated steel sheet comprises the following components in percentage by weight: c: 0.10 to 0.50, Si: 0.10 to 0.80, Mn: 0.50 to 1.50, P: less than or equal to 0.05, S: less than or equal to 0.05, Al: less than or equal to 0.10, Cr: 0.10 to 0.80, Mo: less than or equal to 0.5, B: less than or equal to 0.005 and N: not more than 0.01, Nb + V + Ti: 0.04 to 0.10, and the balance of Fe and inevitable impurities.
6. The welding wire for laser welding of an aluminum-silicon pre-plated steel sheet according to claim 5, wherein the thickness of the substrate of the aluminum-silicon pre-plated steel sheet is 1.0mm to 2.5 mm.
7. The production method of the laser tailor-welded component of the aluminum-silicon pre-coated steel plate is characterized by comprising the following steps of: the aluminum-silicon pre-plating steel plate is welded by the welding wire for laser welding of the aluminum-silicon pre-plating steel plate according to any one of claims 1 to 3 by a laser wire-filling welding method, the blank after the welding is heated for 180s to 480s at 880 ℃ to 940 ℃, and quenched at the cooling speed of more than 30 ℃/s.
8. An aluminum-silicon precoated steel plate laser tailor-welded component, which is produced by the production method of claim 7.
9. The laser tailor welded assembly according to claim 8, wherein the structure of the welded zone of the laser tailor welded assembly is a fully martensitic structure.
10. The laser tailor-welded component of an aluminum-silicon pre-coated steel plate according to claim 8, wherein the laser tailor-welded component of the aluminum-silicon pre-coated steel plate has a tensile strength of 1580MPa or more, an elongation of 6.5% or more, and a tensile fracture position on a base material; the welding seam has no red rust after neutral salt spray test.
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| CN202210625063.0A CN114871633B (en) | 2022-06-02 | 2022-06-02 | Welding wire for laser welding of aluminum-silicon pre-coated steel plate, laser welding component of aluminum-silicon pre-coated steel plate and production method of welding wire |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115255715A (en) * | 2022-08-24 | 2022-11-01 | 湖南瑞华新材料有限公司 | Alloy welding wire for laser welding and method for improving strength of aluminum-boron-plated steel welding seam |
| CN115446453A (en) * | 2022-09-19 | 2022-12-09 | 中国科学院上海光学精密机械研究所 | Method for producing a coated hot-formed steel part |
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| CN114871633B (en) | 2024-04-30 |
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