摘要
研究了在含P耐候钢冷轧连续生产过程中激光焊接工艺对焊缝组织和力学性能的影响。结果表明,冷轧前对钢板激光焊缝进行焊后加热处理,可以减少焊缝中针状铁素体、马氏体或贝氏体等脆性组织的含量,减少P元素在晶界上的偏析,从而降低焊缝与母材之间力学性能的差别,提高了焊缝抵抗冷轧轧制过程开裂的风险。在工业产线上进行耐候钢的批量冷轧轧制,激光焊接后采用10 kW功率进行后加热处理,未出现断带问题,大压下量轧制后焊缝质量良好。
The influences of laser welding process on weld microstructure and mechanical properties of P-bearing weathering steel during continuous cold rolling production were studied. The results show that the application of proper post-weld heat treatment for laser welding before cold rolling seam could decrease the proportion of brittle microstructures such as acicular ferrite, martensite or bainite, and the segregation of phosphorus on grain boundaries. Therefore, the differences of mechanical properties between the weld seam and the base material can be reduced, and the split risk of weld seam during cold rolling is decreased. Mass cold rolling of weathering steel was carried out on industry line, 10 kW post-weld heat treatment was used after laser welding, split of weld seam didn’t appear and the weld seam after cold rolling with large reduction remained good quality.
作者
朱赫男
杨佳伟
陈刚
张志建
ZHU He'nan;YANG Jiawei;CHEN Gang;ZHANG Zhijian(Institute of Research of Iron and Steel,Shasteel,Suzhou 215000,China)
出处
《热加工工艺》
北大核心
2020年第19期39-43,共5页
Hot Working Technology
关键词
含磷耐候钢
激光焊接
焊后热处理
冷轧
P-bearing weathering steel
laser welding
post-weld heat treatment
cold rolling
