980mpa cold-rolled multiphase steel acid pickling process laser welding method
By adjusting the laser welding process parameters of 980MPa cold-rolled multiphase steel and using 780MPa dual-phase steel as a transition material, the problems of high welding difficulty and weld breakage of 980MPa grade cold-rolled multiphase steel were solved, and a highly efficient and stable welding process was achieved.
CN122343301APending Publication Date: 2026-07-07BENGANG STEEL PLATES CO LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- BENGANG STEEL PLATES CO LTD
- Filing Date
- 2026-06-08
- Publication Date
- 2026-07-07
AI Technical Summary
Technical Problem
Welding 980MPa grade cold-rolled multiphase steel is difficult, and weld breakage occurs frequently, affecting production efficiency and yield.
Method used
Specific laser welding process parameters and transition material welding methods are adopted, including 780MPa duplex steel as the transition material. The heating power, laser focal length and speed before and after welding are adjusted to ensure welding stability and quality.
Benefits of technology
It effectively reduces weld breakage accidents, improves production efficiency and yield, ensures crack-free weld quality, and is suitable for mass production.
✦ Generated by Eureka AI based on patent content.
Abstract
This invention relates to the field of ultra-high strength steel welding technology, and more particularly to a laser welding method for the pickling and rolling process of 980MPa cold-rolled multiphase steel. The 980MPa cold-rolled multiphase steel is produced using a combined pickling and rolling unit. The tail end of the front coil and the head end of the rear coil are butt-welded using a laser welding machine, with 780MPa multiphase steel used as the transition material. By adjusting the welding process parameters, the welding difficulties encountered in the pickling and rolling process of 980MPa multiphase steel are solved, reducing the incidence of strip breakage along the weld seam during pickling and rolling, and effectively improving production efficiency.
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