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不锈钢SUS304激光填丝焊工艺研究

Study on Laser Filler Wire Welding Process of Stainless Steel SUS304

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摘要

研究了不锈钢SUS304的激光填丝焊接工艺对焊接质量的影响。研究发现, 随着激光功率的升高, 焊缝由钉状变为“束腰”状, 焊缝熔宽的变化不明显, 焊缝余高逐渐减小;焊接速度的提高使得焊缝变得“细小”, 焊缝宽度减小, 焊接速度的增大也使得焊缝余高的减小;送丝速度增大使得熔宽有一定的减小, 余高增加较为明显, 并且当送丝速度达到3.0 m/min时, 过渡金属不能充分地铺展, 焊缝表面质量较差。在实验设定的参数范围内, 接头拉伸断裂位置均在母材, 焊缝强度能够得到保证。焊缝区由细小的柱状奥氏体枝晶和枝晶间少量的铁素体组成, 焊缝区的显微硬度在230 HV左右, 高于母材(约190 HV)。

Abstract

In this paper, the influence of laser welding process of stainless steel SUS304 on welding quality is studied. In the research, it was found that with the increase of laser power, the joint from nail shape changed into “waist” shape, and the change of weld width is not obvious, the weld reinforcement decreases gradually. The improvement of the welding speed makes the joint become “slender” and the weld width decreases as well as the weld reinforcement decreases. While the wire feed rate increases, the weld width decreases, and the weld reinforcement increases obviously. And when the wire feed rate reaches 3.0 m/min, the transition metal can not fully spread out, the joint surface quality is poor. The tensile fracture position of the joints in the experimental setting is in the base metal and the weld strength can be ensured. The weld zone is composed of a small amount of austenite dendrite and a small amount of ferrite. The microhardness of the weld zone is about 230 HV, which is higher than that of base metal(about 190 HV).

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中图分类号:TG456.7

DOI:10.14128/j.cnki.al.20163602.181

收稿日期:2016-01-08

修改稿日期:2016-03-18

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作者单位    点击查看

李春广:南京南车浦镇城轨车辆有限责任公司, 江苏 南京210031
唐舵:华中科技大学材料科学与工程学院, 湖北 武汉 430074
云中煌:南京南车浦镇城轨车辆有限责任公司, 江苏 南京210031
隋显庭:南京南车浦镇城轨车辆有限责任公司, 江苏 南京210031
夏宁:南京南车浦镇城轨车辆有限责任公司, 江苏 南京210031
孟宪伟:南京南车浦镇城轨车辆有限责任公司, 江苏 南京210031
王凯杰:华中科技大学材料科学与工程学院, 湖北 武汉 430074
王春明:华中科技大学材料科学与工程学院, 湖北 武汉 430074

联系人作者:王春明(cmwang@hust.edu.cn)

备注:李春广(1980-), 男, 硕士, 高级工程师, 主要从事轨道车辆工艺管理及工艺设计开发工作

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引用该论文

Li Chunguang,Tang Duo,Yun Zhonghuang,Sui Xianting,Xia Ning,Meng Xianwei,Wang Kaijie,Wang Chunming. Study on Laser Filler Wire Welding Process of Stainless Steel SUS304[J]. APPLIED LASER, 2016, 36(2): 181-187

李春广,唐舵,云中煌,隋显庭,夏宁,孟宪伟,王凯杰,王春明. 不锈钢SUS304激光填丝焊工艺研究[J]. 应用激光, 2016, 36(2): 181-187

被引情况

【1】李时春,许伟,伍俏平. 填充焊丝对激光焊接过程的影响. 激光与光电子学进展, 2017, 54(12): 120005--1

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