首页 > 论文 > 中国激光 > 41卷 > 1期(pp:103004--1)

SUS301L不锈钢CO2激光-MIG复合焊接头组织性能研究

Mircostructure and Performance of CO2-MIG Hybrid Welding of SUS301L Stainless Steel

  • 摘要
  • 论文信息
  • 参考文献
  • 被引情况
  • PDF全文
分享:

摘要

针对2 mm厚SUS301L奥氏体不锈钢薄板进行CO2激光熔化极惰性气体保护电弧(MIG)复合对接焊试验,深入分析了焊接接头不同区域的显微组织及相组成,研究了装配间隙对焊接接头微观组织和力学性能的影响。结果表明,SUS301L奥氏体不锈钢复合焊接接头中心区域呈一定方向性的细小枝晶组织,未出现等轴晶区域,偏离焊缝中心区为垂直于熔合线向焊缝中心生长的柱状晶组织,距焊缝中心距离越远,晶粒越粗大;焊接接头主要由γ奥氏体相和少量δ铁素体相组成,焊缝凝固模式为铁素体奥氏体结晶(FA)模式,凝固过程中发生的δ-γ转变由块状转变和相界面处的短程自由扩散作用共同完成;随着装配间隙的增大,焊缝残余δ铁素体含量逐渐降低,抗拉强度随之下降,断裂发生在焊缝靠近熔合线区域的粗大柱状晶区。

Abstract

SUS301L stainless steel sheet with thickness of 2 mm is welded using CO2 laser-metal inert gas arc (MIG) hybrid welding. The microstructure and phase composition of joint are analyzed in detail. Furthermore, the influence of assembly gap on weld microstructures and performance is investigated. Results indicate that the joint is composed of fine dendritic structure in the weld center and columnar crystals far away from the center zone. And the columnar crystals are found growing perpendicularly to the fusion line. Grain size increases with the distance from the center of weld. Phase composition in the joint is identified as γ austenite and a little δ ferrite. The solidification type of weld is dominated by ferrite-austenite (FA) mode and the transformation from δ to γ is dominated by massive transformation and short range free diffusion. With the increase of assembly gap, residual δ content and tensile strength of weld decrease gradually. The fracture occurs at the area of coarse columnar grain near the fusion line.

广告组1 - 空间光调制器+DMD
补充资料

中图分类号:TG456.7

DOI:10.3788/cjl201441.0103004

所属栏目:激光制造

责任编辑:宋梅梅  信息反馈

基金项目:国家自然科学基金(51275013)、国家科技重大专项(2013ZX04001-131)

收稿日期:2013-06-08

修改稿日期:2013-08-16

网络出版日期:--

作者单位    点击查看

陈洋:北京工业大学激光工程研究院, 北京 100124
吴世凯:北京工业大学激光工程研究院, 北京 100124
肖荣诗:北京工业大学激光工程研究院, 北京 100124

联系人作者:陈洋(cy1987@emails.bjut.edu.cn)

备注:陈洋(1987—),男,硕士研究生,主要从事激光电弧复合焊接方面的研究。

【1】Li Gangqing, Han Xiaohui. Welding process and development of stainless steel car body[J]. Locomotive and Rolling Stock Technology, 2004, (1): 1-4.
李刚卿, 韩晓辉. 不锈钢车体的焊接工艺及发展[J]. 机车车辆工艺, 2004, (1): 1-4.

【2】Du Haixian, Xu Feng, Hong Liu, et al.. Development of SUS301L cold rolled stainless steel products[J]. World Iron and Steel, 2010, (6): 52-54.
杜海宪, 徐锋, 洪流, 等. SUS301L不锈钢冷轧产品的开发[J]. 世界钢铁, 2010, (6): 52-54.

【3】Wu Maoguo, Liu Wei, Fan Meng, et al.. Microstructure and mechanical properties of resistance spot welding joint of SUS301L plate[J]. J Beijing Jiaotong University, 2005, 29(4): 104-106.
吴茂国, 刘伟, 樊猛, 等. SUS301L板电阻点焊接头的组织和性能[J]. 北京交通大学学报, 2005, 29(4): 104-106.

【4】Ding Chenggang, Shi Chunyuan, Du Bengang, et al.. Study on spot welding process of stainless steel SUS301L[J]. Hot Working Technology, 2006, 35(11): 28-29.
丁成刚, 史春元, 都本钢, 等. SUS301L不锈钢电阻点焊工艺研究[J]. 热加工工艺, 2006, 35(11): 28-29.

【5】Wang Hongxiao, Shi Chunyuan, Wang Chunsheng, et al.. Study on laser welding process for stainless steel railway vehicle[J]. Hot Working Technology, 2009, 38(19): 136-139.
王洪潇, 史春元, 王春生, 等. 铁道客车用SUS301L不锈钢非熔透型激光搭接焊工艺[J]. 热加工工艺, 2009, 38(19): 136-139.

【6】Wang H X, Wang C S, Shi C Y. The investigation of partial penetration lap laser welding applied on stainless steel railway vehicles[J]. Advanced Materials Research, 2010, 97-101: 3832-3835.

【7】Liu J. Study of laser lap welding of SUS301L austenitic stainless steel using optimal design method[J]. Rare Metal Materials and Engineering, 2011, 40(4): 63-67.

【8】Han Fang, Lu Peide. The manufacture technology for side wall of the stainless steel car body structure[J]. Rolling Stock, 2000, 38(6): 22-24.
韩方, 陆培德. 不锈钢车体钢结构侧墙制造技术[J]. 铁道车辆, 2000, 38(6): 22-24.

【9】Zeng Xiaoyan, Gao Ming, Yan Jun. Effects of shielding gas in laser-arc hybrid welding[J]. Chinese J Lasers, 2011, 38(6): 0601005.
曾晓燕, 高明, 严军. 保护气体对激光电弧复合焊接的影响[J]. 中国激光, 2011, 38(6): 0601005.

【10】Zhao Yaobang, Lei Zhenglong, Chen Yanbin. Analysis of melting characteristics of laser-arc double sided welding for stainless steel[J]. Chinese J Lasers, 2011, 38(2): 0203001.
赵耀邦, 雷正龙, 陈彦宾. 不锈钢激光电弧双面焊接头熔化特征分析[J]. 中国激光, 2011, 38(2): 0203001.

【11】S B Hee, S B Han, C K You, et al.. A study on mechanical and microstructure characteristics of the STS30L butt joints using hybrid CO2 laser-gas metal arc welding[J]. Materials and Design, 2011, 32(4): 2328-2333.

【12】P Sathiya, K M Mahendra, B Shanmugarajan. Effect of shielding gases on microstructure and mechanical properties of super austenitic stainless steel by hybrid welding[J]. Materials and Design, 2012, 33(1): 203-212.

【13】B Hu, G D Ouden. Laser induced stabilization of the welding arc[J]. Science and Technology of Welding and Joining, 2005, 10(1): 76-81.

【14】Kutsuna G, Liang Chen. Interaction of both plasmas in CO2 laser-MAG hybrid welding of carbon steel[C]. SPIE, 2003, 4831: 341-346.

【15】Rao Z H, Liao S M, Tsai H L. Modelling of hybrid laser-GMA welding: review and challenges[J]. Science and Technology of Welding and Joining, 2011, 16(4): 300-305.

【16】Chen Yang, Wu Shikai, Xiao Rongshi. Study on CO2-MIG hybrid welding of SUS301L stainless steel sheet[J]. Applied Laser, 2013, 33(2): 158-163.
陈洋, 吴世凯, 肖荣诗. SUS301L不锈钢薄板CO2激光-MIG复合焊工艺研究[J]. 应用激光, 2013, 33(2): 158-163.

【17】Kamiya O, Kumagal K, Kikuchi Y. The effects of δ ferrite morphology on low temperature fracture toughness of austenitic stainless steel weld metal[J]. Quarterly J Japan Welding Society, 1991, 9(4): 61-67.

【18】J C Lippold, W F Savage. Solidification of austenitic stainless steel weldments[J]. Welding Journal, 1979, 58(12): 362-374.

【19】J C Lippold, D J Kotecki. Welding Metallurgy and Weldability of Stainless Steels[M]. New York: John Wiley & Sons Inc., 2005. 153-162.

【20】W Kurz, D J Fisher. Dendrite growth at the limit of stability: tip radius and spacing[J]. Acta Metallurgica, 1981, 29(1): 11-20.

【21】J C Lippold. Solidification behavior and cracking susceptibility of pulsed-laser welds in austenitic stainless steels[J]. Welding Journal, 1994, 73(6): 129-139.

【22】D J Kotecki, T A Siewert. WRC-1992 constitution diagram for stainless steel weld metals: a modification of the WRC-1988 diagram[J]. Welding Journal, 1992, 71(5): 171-178.

【23】J A Brooks, J C Williams, A W Thompson. STEM analysis of primary austenite solidified stainless steel welds[J]. Metallurgical Transactions A, 1983, 14(1): 23-31.

【24】N Lewis, M J Cieslak, W F Savage. Microsegregation and eutectic ferrite-to-austenite transformation in primary austenite solidified CF-8M weld metals[J]. J Materials Science, 1987, 22(8): 2799-2810

您的浏览器不支持PDF插件,请使用最新的(Chrome/Fire Fox等)浏览器.或者您还可以点击此处下载该论文PDF