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J4  2011, Vol. 45 Issue (1): 136-140    DOI: 10.3785/j.issn.1008-973X.2011.01.023
能源与机械工程     
不锈钢汽车排气管激光焊接残余应力
刘立君1,2,戴鸿滨2,朱荣华2
1. 浙江大学宁波理工学院 机电与能源分院,浙江 宁波 315100;
2. 哈尔滨理工大学 材料科学与工程学院,黑龙江 哈尔滨 150080
Residual stress  of laser welding joint of stainless steel automobile vent pipeL
LIU Li-jun1,2, DAI Hong-bin2, ZHU Rong-hua2
1.School of Mechanical and Energy Engineering, Ningbo Institute of Technology, Zhejiang University, Ningbo 315100, China;
2.School of Material Science and Engineering, Harbin University of Science and Technology ,Harbin 150080, China
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摘要:

为了提高不锈钢管的冷加工成形性能,进一步优化相应焊接工艺,在对汽车排气管激光焊接温度场进行数值模拟研究的基础上,分析激光焊接汽车排气管残余应力.在考虑网格的疏密过渡以及材料力学性能参数随温度的变化条件下,分析激光焊接不锈钢管残余应力演变过程及分布特点,即滚轮挤压量越小,平均残余应力越小,但容易出现咬边和未焊透,在局部产生应力集中,更容易在焊接管冷加工时出现开裂;激光焊接线能量减小,轴向残余应力区域变窄,峰值应力增加.将激光焊接残余应力与钨极氩弧焊(TIG)+激光焊的残余应力进行对比实验,结果表明,不锈钢管TIG+激光焊残余应力与激光焊接具有相似的分布,分布区域相对变宽,焊轴向残余应力比激光焊接小,提高了焊接管冷加工成型性能.

Abstract:

 The residual stress field was calculated based on the numerical simulation of the temperature field of laser welding joint of stainless steel automobile vent pipe in order to improve the cold forming quality of ferrite stainless steel vent pipe and optimize its welding technology. The residual stress of stainless steel pipe was analyzed in laser welding considering the grid spacing transition and the mechanical property change of materials with temperature. Results showed that the average residual stress of welding seam was reduced but the undercut and incomplete penetration of welding seam easily appeared during the decreasing of roller pressure. Because the local stress concentration appeared, the cold forming of automobile vent pipe easily caused cracks. The axial residual stress distribution was narrow and the peak residual stress rose during decreasing heat input of laser welding. The residual stress in laser welding was compared with the residual stress in tungsten inert gas (TIG) welding+ laser welding. Results showed that the residual stress distribution in TIG + laser welding was wider than one in laser welding, the axial residual stress in TIG + laser welding was smaller than one in laser welding, and the cold forming quality of automobile vent pipe was improved.

出版日期: 2011-03-03
:  TP 274  
基金资助:

哈尔滨工业大学现代焊接国家重点实验室基金资助项目(Welding 08003);宁波自然基金重点资助项目(2008A610031);黑龙江省自然科学基金资助项目(E2007-01).

作者简介: 刘立君(1968-),男,黑龙江哈尔滨人,教授,从事焊接自动控制及模具修复再制造技术研究.E-mail:888liulijun@163.com
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引用本文:

刘立君,戴鸿滨,朱荣华. 不锈钢汽车排气管激光焊接残余应力[J]. J4, 2011, 45(1): 136-140.

LIU Li-jun, DAI Hong-bin, ZHU Rong-hua. Residual stress  of laser welding joint of stainless steel automobile vent pipeL. J4, 2011, 45(1): 136-140.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2011.01.023        http://www.zjujournals.com/eng/CN/Y2011/V45/I1/136

[1] 陈彦宾. 现代激光焊接技术[M]. 北京: 科学出版社, 2005: 153-167.
[2] 魏艳红, 刘仁培. 不锈钢焊接凝固裂纹温度场的数值模拟[J]. 焊接学报, 1999, 20(3): 200-203.
WEI Yanhong, LIU Renpei. Numerical simulation of temperature fields for weld metal solidification cracking in stainless steels [J]. Transactions of the China Welding Institution, 1999, 20(3): 200-203.
[3] LEE Hwateng, CHEN Chunte, WU Jialin. Numerical and experimental investigation into effect of temperature field on sensitization of Alloy 690 butt welds fabricated by gas tungsten arc welding and laser beam welding [J]. Journal of Materials Processing Technology, 2010, 210(12): 1636-1645.
[4] YAN Yixia , HAN Zhiming,HUANG Xicheng. 3D numerical simulation of laser braze welding process of different metals [C]∥ International Conference on Computer Modeling and Simulation. Sanya, China: IEEE, 2010: 165-168.
[5] 张峻,柯映林.拼焊板成形过程控制参数优化设计[J].浙江大学学报:工学版, 2005, 39(12): 1930-1935.
ZHANG Jun, KE Yinglin. Parameters optimization of tailor welded blank forming process [J]. Journal of Zhejiang University: Engineering Science, 2005, 39(12): 1930-1935.
[6] 王伟明,毛惠刚.汽车排气系统用409型铁素体不锈钢的开发研究[J].宝钢技术,2005,12(4): 56-60.
WANG Weiming, MAO Huigang. Development and research on 409 ferrite stainless steel for automotive exhaust system [J]. Bao Steel Technology, 2005, 12(4): 56-60.
[7] 皮克纳,伯恩斯坦,顾守仁,等.不锈钢手册[M].北京:机械工业出版社,1987: 452-502.
[8] 张朝生. 汽车排气用铁素体不锈钢焊管的开发[J]. 焊管,1994, 17(6): 27-32.
ZHANG Chaosheng. The development of ferritic stainless steel welded exhaust pipe used in automobile [J]. Welded Pipe and Tube, 1994, 17(6): 27-32.
[9] 李冬青, 孟庆国, 陶军, 等. 焊接动态位移场的建模与数值模拟[J]. 焊接, 2002, 31(2): 13-15.
LI Dongqing, MENG Qingguo, TAO Jun, et al. Modeling and numerical simulation of dynamic displacement field of welding [J]. Welding and Joining, 2002, 31(2): 13-15.
[10] SHANMUGAM N S, BUVANASHEKARAN G, SANKARANARAYANASAMY K. Transient finite element simulation of the temperature field and bead profile of Tjoint laser welds [J]. International Journal of Modelling and Simulation, 2010, 30(1): 108-122.

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