Welding wire for laser butt welding of Al-Si coated plates formed by hot-stamping and butt welding method
A technology of hot stamping and laser tailor welding, applied in laser welding equipment, welding equipment, welding media, etc., can solve problems such as high cost, poor weld toughness, unfavorable weld seam or component fatigue performance and dynamic mechanical properties, etc. Achieve the effect of improving weld toughness and excellent mechanical properties
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[0034] The present invention will be further described in detail below in conjunction with specific embodiments.
[0035] The chemical composition and mass percentage of the welding wire for laser tailor welding of the hot stamped Al-Si coated sheet in each embodiment of the present invention are: C≤0.30%, preferably 0.22 to 0.25%; Mn: 1.0 to 1.5%, preferably 1.3~1.5%; S≤0.005%; P≤0.010%; Als: 0.030~0.050%; Si≤0.010%; Ni: 5.0~9.0%, preferably 6.0~8.0%; Cr: 0.21~0.50%; Nb: 0.010 ~0.020%; Ti: 0.010~0.020%; N≤0.0030%, the balance is Fe and unavoidable impurities. The diameter d of the welding wire is 0.6 to 1.0 mm.
[0036] The laser tailor welding method for hot stamping Al-Si coated sheet using the above-mentioned welding wire includes the following steps:
[0037] (1) Take two Al-Si coated plates after surface decontamination treatment: the thickness of the steel plate substrate in the Al-Si coated plate is 1.0~2.0mm, and its composition and mass percentage are: C: 0.21~0.25 %, Mn...
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