| 摘要: |
| 针对443铁素体不锈钢焊接接头存在粗晶组织与性能脆化等问题进行研究,采用光学显微镜(OM)、扫描电子显微镜(SEM)分析了不同焊接方法焊后接头组织和性能的变化.采用钨极氩弧焊(TIG)、脉冲钨极氩弧焊(P-TIG)和脉冲激光焊(P-LBW)三种焊接方法进行焊接,分析了不同热输入对超薄443铁素体不锈钢焊接接头微观组织、拉伸性能和杯突性能的影响规律.结果表明,焊接热输入是影响该铁素体不锈钢焊接接头组织和性能的重要因素,采用脉冲焊接方法来细化组织可以有效提高焊接接头综合性能. |
| 关键词: 443铁素体不锈钢 钨极氩弧焊 脉冲激光焊 拉伸性能 杯突性能 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目(51175364) |
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| Effect of heat input on microstructure and mechanical properties of ultra-thin 443 ferritic stainless steel |
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ZHANG Hongxia1, LI Hongzhi1, WANG Zhibin2, WANG Wenxian1, ZHANG Xinbao2, YAN Zhifeng1
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1.College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China;2.TISCO Technology Center, Taiyuan 030003, China
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| Abstract: |
| Tungsten inert gas (TIG) welding,pulsed tungsten inert gas (P-TIG) welding and pulsed laser beam welding (P-LBW) of ultra-thin 443 ferritic stainless steel sheets were conduted to investigate the problems of coarsened grain and brittleness in the weld.The effects of different welding processes on the microstructure and mechanical properties of resultant joints were analyzed with optical microscope (OM) and scanning electron microscope (SEM).The effects of welding heat input on microstructure,tensile property and cupping property of joints were evaluated.The experimental results reveal that the welding heat input was the key factor to determine the microstructure and mechanical properties of 443 ferritic stainless steel welded joints.And grain refinement by pulsed welding process can improve the comprehensive mechanical properties of the resultant joint. |
| Key words: 443 ferritic stainless steel tungsten inert gas welding pulsed laser beam welding tensile property cupping property |
