Welding method for 980MPa-level cold-rolled dual-phase steel
A welding method, 980mpa technology, applied in welding equipment, roller electrode welding, welding/welding/cutting articles, etc., can solve the problems of large welding current, poor weldability, difficulty in obtaining smooth and smooth weld quality, etc., and achieve reduction The effect of the cost of capital
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Embodiment 1
[0030] Production variety: DP980
[0031] Specifications: 1.8mm*1224mm
[0032] The strip is welded using a narrow lap welder on a continuous annealing line.
[0033] Welding process: the strip tail of the front coil and the strip head of the rear coil are cut at the entrance, and then overlapped with each other for welding.
[0034] Welding process: welding current 23KA; welding speed 8m / min; welding wheel pressure 25KN; welding overlap 1.7mm; welding compensation 1.2mm.
[0035] After the above-mentioned welding process, the weld seam is smooth and smooth, without nodules, no weld scars, no weld penetration, and no cracks along the weld seam in the cupping test. There was no broken belt accident caused by weld seam.
Embodiment 2
[0037] Production variety: DP980
[0038] Specifications: 1.5mm*1224mm
[0039] Welding process: the strip tail of the front coil and the strip head of the rear coil are cut at the entrance, and then overlapped with each other for welding.
[0040] Welding process: welding current 19.6KA; welding speed 8m / min; welding wheel pressure 23KN; welding overlap 1.7mm; welding compensation 1.2mm.
[0041] After the above-mentioned welding process, the weld seam is smooth and smooth, without nodules, no weld scars, no weld penetration, and no cracks along the weld seam in the cupping test. There was no broken belt accident caused by weld seam.
Embodiment 3
[0043] Production variety: DP980
[0044] Specification: 1.2mm*1224mm
[0045] The strip is welded using a narrow lap welder on a continuous annealing line.
[0046] Welding process: the strip tail of the front coil and the strip head of the rear coil are cut at the entrance, and then overlapped with each other for welding.
[0047] Welding process: welding current 19.1KA; welding speed 8m / min; welding wheel pressure 21.3KN; welding overlap 1.7mm; welding compensation 1.2mm.
[0048] After the above-mentioned welding process, the weld seam is smooth and smooth, without nodules, no weld scars, no weld penetration, and no cracks along the weld seam in the cupping test. There was no broken belt accident caused by weld seam.
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