提升430铁素体不锈钢激光焊缝低温性能的方法
By employing techniques such as negative defocusing low-power laser welding, hot-wire laser welding, short-time induction annealing, and pre-rolling induction heating, the welding process and heat treatment of 430 ferritic stainless steel welds were optimized, solving the problem of poor low-temperature performance of the welds and achieving improved low-temperature toughness and production stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHANXI TAIGANG STAINLESS STEEL CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-07-17
AI Technical Summary
430 ferritic stainless steel welds are prone to cracking at low temperatures. Traditional production processes cannot effectively improve the low-temperature performance of welds, leading to frequent cracking and breakage accidents, affecting production continuity and economic losses.
By employing negative defocus low-power laser welding, hot-wire laser welding, short-time induction annealing, pre-rolling induction heating, and coordinated adjustment of rolling parameters, the welding process and heat treatment microstructure are optimized, heat input is reduced, grains are refined, residual stress is released, and the low-temperature toughness and crack resistance of the weld are improved.
It significantly improves the low-temperature impact toughness of welds to over 22J, reduces the probability of low-temperature cracking, enhances production stability and economic benefits, and reduces failure losses.
Smart Images
Figure CN120861590B_ABST