激光线能量对0Cr18Ni10Ti焊缝组织及力学性能的影响研究  

Effect of Laser Linear Energy on Microstructure and Mechanical Properties of 0Cr18Ni10Ti Welded Joint

作　　者：吴承隆 尹浩 任立辉 付瑜 WU Chenglong;YIN Hao;REN Lihui;FU Yu(College of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350108,China;Tianjin Branch Office,Hubei Aviation Precision Machinery Technology Co.Ltd,Tianjin 300300,China)

机构地区：[1]福州大学机械工程及自动化学院,福建福州350108 [2]湖北航嘉麦格纳座椅系统有限公司天津分公司,天津300300

出　　处：《热加工工艺》2022年第19期35-40,共6页Hot Working Technology

摘　　要：研究了激光线能量对2 mm厚的0Cr18Ni10Ti奥氏体不锈钢激光焊焊缝成形、组织以及力学性能的影响,得出激光线能量对接头质量的影响机理。结果表明,随着激光线能量的增加,焊缝表面氧化程度逐渐加深,焊缝背面余高逐渐减小,金属飞溅现象加剧。同时线能量的增加使得焊缝组织粗化、热影响区宽度增大。当激光线能量大于70.59J/mm,接头抗拉强度均大于母材的,试样均断裂在母材处;激光焊接头的显微硬度分布呈M型,熔合线处的显微硬度最大,焊缝中心区硬度要大于热影响区的。The effect of laser linear energy on the weld formation, microstructure and mechanical properties of 2 mm thick 0Cr18Ni10Ti austenitic stainless steel laser welding was studied. The mechanism of laser linear energy on the joint quality was obtained. The results show that with the increase of laser linear energy, the oxidation degree of weld surface gradually increases, the weld back reinforcement decreases gradually, and the metal spatter phenomenon intensifies. The increase of linear energy makes the weld microstructure coarsen and the width of heat affected zone increase. When the laser linear energy is bigger than 70.59 J/mm, the tensile strengths of the joints are bigger than that of the base metal, the specimens are all broken at the base metal. The microhardness distribution of laser welded joint is M-type, and the microhardness of fusion line is the maximum, and the hardness of the weld center is bigger than that of the heat affected zone.

关 键 词：0CR18NI10TI 激光焊 组织 力学性能 

分 类 号：TG456.7[金属学及工艺—焊接]