TRIP钢激光焊接辅助感应加热焊缝性能研究.pdfVIP

TRIP 钢激光焊接辅助感应加热焊缝性能研究 1 2 1 1 李志强 吕 冬 程 欣 宗 旭 （1.鞍钢股份冷轧厂， 鞍山 114021 ；2.鞍钢股份技术中心，鞍山 114021 ） 1 摘 要 TRIP 钢焊缝区域能否顺利通过冷连轧机的连续轧制而不发生断带，成为酸轧联合机组能否稳定连续生产 TRIP 钢的主要因素。使用激光焊接辅助感应加热，在激光功率、焊接速度及激光焦距固定的条件下使用不同感应 加热参数对 TRIP 钢同钢质焊接，预热和后热参数对焊缝区域的硬度、强度及裂纹的产生均有比较明显的影响。通 过杯突测试、拉伸测试、微观硬度测试和显微组织观察，表明后加热参数更能有效地提高焊缝各区域的最高温度， 同时降低焊缝的冷却速度，使用预热为0 且后热为 42%时焊缝区域的综合力学性能较好。 关键词 激光焊接 感应加热 力学性能 Research on TRIP Weld Mechanical Character Induction Assisted Laser Welding Li Zhiqiang1 Lv Dong2 Cheng Xin1 Zong Xu1 (1.Cold Strip Works, Angang Steel Co., Ltd.,Anshan, 114021； 2.Technique Centre,Angang Steel Co., Ltd.,Anshan, 114021) Abstract It is important that the TRIP weld can be rolled by cold strip mill and no breakage,even this will influence whether the whole cold strip mill produce the TRIP continuously and stably.Using Induction assisted laser welding method,using the same laser power,welding speed focus distance, and a series of preheater and postheater parameter to weld the TRIP material,the preheater and postheater power can obviously influence the weld zone’s strength,hardness and cold crack.Through the the Classic Erichsen test, tensile test,microhardness test and microstructural observing,the conclusion is the postheater parameters can effectively obtain the higher temperature and decrease the cold speed of weld, the better weld with better synthesis mechanical character can be obtained by using the preheater and postheater power is 0% and 42%. Key words laser welding，induction，mechanical character 1 引言 为满足汽车发展的要求，应对汽车“减轻质量、解决能源”和“提高安全性”，同时与