16 mm S355J2W+N耐候钢板激光电弧复合焊对接工艺

doi:10.13229/j.cnki.jdxbgxb201501027

吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (1): 181-186.doi: 10.13229/j.cnki.jdxbgxb201501027

16 mm S355J2W+N耐候钢板激光电弧复合焊对接工艺

甄舒^1，2，孙大千¹，高丹丹¹，段珍珍²

1.吉林大学材料科学与工程学院，长春 130022；
2.长春轨道客车股份有限公司，长春 130062

收稿日期:2013-09-16 出版日期:2015-02-01 发布日期:2015-02-01
通讯作者: 孙大千(1954),男,教授,博士生导师.研究方向:先进材料连接.E-mail:sundq@jlu.edu.cn
作者简介:甄舒(1985)，女，博士研究生.研究方向:碳钢中厚板激光电弧复合焊焊接工艺.E-mail:664779667@qq.com
基金资助:
吉林省科技发展计划项目(20140204069GX)；吉林省省校合作技术开发项目(轨道客车转向架激光-电弧复合焊接技术的开发).

Butt-welding process of laser-MAG hybrid welding of 16 mm S355J2W+N steel plates

ZHEN Shu^1,2,SUN Da-qian¹,GAO Dan-dan¹,DUAN Zhen-zhen²

1.College of Materials Science and Engineering, Jilin University, Changchun 130022,China;
2.Changchun Railway Vehicles Co., Ltd, Changchun 130062, China

Received:2013-09-16 Online:2015-02-01 Published:2015-02-01

摘要/Abstract

摘要： 应用激光共聚焦显微镜、扫描电镜、显微硬度计及万能拉伸试验机等仪器研究了复合焊焊接参数对焊缝成形、复合焊焊接接头的组织及力学性能的影响。研究结果表明:激光功率、焊接电流均对熔深增大有促进作用;激光功率对熔宽无明显影响，但当激光功率相对较低时，焊缝熔宽呈宽窄交替的“麻花状”;多层焊焊缝形貌类似“高脚杯”状;焊缝金属中存在少量气孔，其形成与焊接过程中母材及焊丝中金属锰气化无直接联系。焊接接头拉伸过程中产生明显颈缩，断裂发生在母材区，断口表面具有明显的塑性变形特征。

关键词: 材料合成与加工工艺, 接头特性, 激光电弧复合焊, S355J2W+N, 焊缝成形

Abstract: The effects of laser power and welding current on the appearance of weld, the microstructures and mechanical properties of welded joint were studied by CLSM, SEM, microhardness tester and universal tensile tester. The results show that laser power and welding current greatly promote the weld penetration. Laser power has no obvious influence on the weld width except that the weld is "bread twist" like when the laser power is relatively low. The multi-layer hybrid weld is goblet-shaped and there are a small amount of pores within the weld metal. The formation of the pores has nothing to do with the gasification of element Mn in the base metal and filler metal. Obvious necking emerges in the base metal zone where fracture happens during the tensile test. Furthermore, the fracture appearance has a typical characteristic of plastic deformation.

Key words: materials synthesis and processing technology, characteristics of welded joint, laserMAG hybrid welding, S355J2W+N, weld appearance

中图分类号:

TG456.9

甄舒，孙大千，高丹丹，段珍珍. 16 mm S355J2W+N耐候钢板激光电弧复合焊对接工艺[J]. 吉林大学学报(工学版), 2015, 45(1): 181-186.

ZHEN Shu,SUN Da-qian,GAO Dan-dan,DUAN Zhen-zhen. Butt-welding process of laser-MAG hybrid welding of 16 mm S355J2W+N steel plates[J]. 吉林大学学报(工学版), 2015, 45(1): 181-186.

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16 mm S355J2W+N耐候钢板激光电弧复合焊对接工艺

Butt-welding process of laser-MAG hybrid welding of 16 mm S355J2W+N steel plates

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