Fe-Mn-Al-C低密度高强钢焊接技术的研究与进展  

Research progress on welding technology of Fe-Mn-Al-C low density and high strength automobile steel

作　　者：万亚雄 唐立志 武学俊 章小峰[1,2] 张朋彦 黄贞益 Wan Yaxiong;Tang Lizhi;Wu Xuejun;Zhang Xiaofeng;Zhang Pengyan;Huang Zhenyi(Anhui Province Key Laboratory of Metallurgical Engineering&Resources Recycling,Anhui University of Technology,Maanshan 243002,Anhui,China;School of Metallurgical Engineering,Anhui University of Technology,Maanshan 243002,Anhui,China)

机构地区：[1]安徽工业大学,冶金工程与资源综合利用安徽省重点实验室,安徽马鞍山243032 [2]安徽工业大学,冶金工程学院,安徽马鞍山243032

出　　处：《焊接》2020年第8期45-51,63,64,共9页Welding & Joining

基　　金：国家自然科学基金资助项目(51674004)。

摘　　要：从Fe-Mn-Al-C低密度高强钢的组织性能、焊接难点以及主要的焊接方法出发,综述了Fe-Mn-Al-C低密度高强钢因第二相析出、合金元素挥发与偏析、热影响区晶粒长大与软化而引起的焊接难点,当前主流焊接工艺及其在Fe-Mn-Al-C低密度高强钢中的应用。针对典型的焊接工艺特点,结合Fe-Mn-Al-C高强钢在焊接过程中第二相的析出、焊接裂纹和成分偏析的产生等所存在的问题,指出激光-电弧复合焊、激光钎焊、搅拌摩擦焊等新焊接工艺将会在解决此类钢材焊接问题的具有较好的优势,是未来值得密切关注的研究方面。With the rapid development of automobile industry and the increasingly stringent requirements of"energy saving and emission reduction",automobile lightweight has become an inevitable choice for the development of automobile industry.Fe-Mn-Al-C low density high strength steel is one of the potential materials for automobile manufacturing.It is very important to master its welding method and improve its welding performance.Based on the microstructure and properties,welding difficulties and main welding methods of Fe-Mn-Al-C low-density high-strength steel,the welding difficulties caused by precipitation of second phase,volatilization and segregation of alloy elements,grain growth and softening in heat affected zone,current mainstream welding technology and its application in Fe-Mn-Al-C low-density high-strength steel are reviewed.According to the characteristics of typical welding process,combined with the problems of precipitation of second phase,welding crack and composition segregation in the welding process of Fe-Mn-Al-C high strength steel,it is pointed out that laser arc hybrid welding,laser brazing,friction stir welding and other new welding technologies will have better advantages in solving the welding problems of this kind of steel,which are worthy of close attention in the future.

关 键 词：Fe-Mn-Al-C高强钢 组织性能特点 焊接难点 焊接方法 

分 类 号：TG44[金属学及工艺—焊接]