TRIP800高强度钢激光焊工艺

Laser welding process of TRIP800 high strength steel

针对TRIP800高强度钢进行激光焊接工艺研究。实验结果表明:1.8 mm厚的TRIP800高强度钢在纯度大于99.9%的氩气保护下,采用光纤激光器焊接,在焊接速度7 mm/s、激光功率570 W、离焦量0 mm的工艺参数条件下可以获得优质的焊缝;焊接接头的抗拉强度660 MPa,断裂方式为塑性断裂。最佳工艺参数条件下的焊缝硬度呈现"M"形分布,接头的最高硬度出现在热影响区,焊缝区硬度较高,母材硬度最低。

Laser wehting process of TRIPS00 high strength steel was studied in this paper. The resuhs showed that,when the tested steel is 1.8 mm thick and the concentration of argon is greater than 99.9% ,the high-quality welds can be obtained when laser welding speed is 7 mm/s,the laser power is 570 W,the defocus amount is 0 mm;tensile strength of welded joints is 660 MPa,the fracture mode is ductile fracture. The hardness of the weld under optimum conditions presents ＂M＂ shape,the maximum hardness at heat-affected zone of the weld joint,the weld zone also has high hardness,the hardness of the base material is the lowest.