420不锈钢激光选区增材件的激光焊接组织和拉伸性能  

Microstructure and Tensile Properties of Laser Welding of 420 Stainless Steel Laser Selective Additive Parts

作　　者：张晨阳 刘明朗[1] 黄仲佳[1] 周晓宏[3] 赵禹 鲍正浩 陶靖 王刚[1] ZHANG Chenyang;LIU Minglang;HUANG Zhongjia;ZHOU Xiaohong;ZHAO Yu;BAO Zhenghao;TAO Jing;WANG Gang(Anhui Key Laboratory of High-performance Non-ferrous Metal Materials,Anhui Polytechnic University,Wuhu 241000,China;Research and Development Department,Anhui Chungu 3D Printing Intelligent Equipment Industrtal Technology Research Institute Co.,Ltd.,Wuhu 241000,China;School of Economics and Management,Anhui Polytechnic University,Wuhu 241000,China)

机构地区：[1]安徽工程大学高性能有色金属材料安徽省重点实验室,安徽芜湖241000 [2]安徽省春谷3D打印智能装备产业技术研究院有限公司研发部,安徽芜湖241000 [3]安徽工程大学经济与管理学院,安徽芜湖241000

出　　处：《安徽工程大学学报》2023年第6期18-24,共7页Journal of Anhui Polytechnic University

基　　金：国家自然科学基金资助项目(52101030);安徽工程大学-繁昌区产业协同创新专项基金资助项目(2021fccyxta1)。

摘　　要：随着增材制造的不断发展,420不锈钢增材制造件的焊接研究变得越发重要。因此,研究了420不锈钢激光选区熔化增材制造件的激光焊接接头的微观组织和焊接件的抗拉性能。结果表明,420不锈钢增材件具有良好的激光焊接成形性能,焊缝区组织细小,焊接热影响区组织粗化不明显,增材件受到激光焊接的热影响较小;增材件焊接件的断裂表现为脆性断裂,抗拉强度高达600 MPa以上,高于420不锈钢轧制试样焊接件的抗拉强度;增材件激光焊缝区的硬度低于母材的硬度。With the development of additive manufacturing,it is crucial to study the welding of 420 stainless steel parts fabricated by additive manufacturing.The microstructure and tensile properties of laser welded joints of selective laser melting additive parts of 420 stainless steel were studied.The results show that 420 stainless steel additive manufacturing parts have a good laser welding formability.The microstructure of welding seam was fine,the microstructure of welding heat affected zone was not obvious.The additive manufacturing parts are less heat affected by laser welding.The fracture of weldment of additive parts is brittle fracture,and the tensile strength is over 600 MPa,much higher than that of weldment of 420 stainless steel rolled samples.The hardness of laser welding zone of additive parts is lower than that of base metal.

关 键 词：选区激光熔化 420不锈钢 激光焊接 焊缝组织 抗拉强度 

分 类 号：TG456.7[金属学及工艺—焊接]