| 汽车变速操纵杆焊接接头冷裂纹产生原因分析 |
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| 引用本文： | 李传瑞,孙萍,丁丽.汽车变速操纵杆焊接接头冷裂纹产生原因分析[J].理化检验(物理分册),2009(7):451-454. |
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| 作者姓名： | 李传瑞 孙萍 丁丽 |
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| 作者单位： | 安徽工程科技学院机械系; |
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| 摘 要： | 汽车变速操纵杆ZG310-570钢与45钢焊接接头焊后发现产生冷裂纹。采用化学成分分析和金相检验的方法对冷裂纹的产生原因进行了分析。结果表明：焊接接头出现淬硬组织以及粗大的魏氏组织是导致冷裂纹产生的主要原因；另外焊条含有的水分、焊件表面的油污和铁锈以及接头的拘束应力也会影响到冷裂纹的产生。并提出相应的预防措施。
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| 关 键 词： | 汽车 异种钢 焊接接头 冷裂纹 淬硬组织 |
Generation Reason Analysis of Cold Crack in Welding Joint of Automobile Variable Speed Control Handle |
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| LI Chuan-rui,SUN Ping,DING Li.Generation Reason Analysis of Cold Crack in Welding Joint of Automobile Variable Speed Control Handle[J].Physical Testing and Chemical Analysis Part A:Physical Testing,2009(7):451-454. |
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| Authors: | LI Chuan-rui SUN Ping DING Li |
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| Affiliation: | Department of Mechanical Engineering of Anhui University of Technology and Science;Wuhu 241000;China |
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| Abstract: | Cold crack was found in the welding joint of ZG310-570 and 45 steels of automobile variable speed control handle.The generation reason of cold crack was analysed by means of chemical composition analysis and metallographic examination.The results showed that the main reason was quench hardening microstructure and bulky widmanstatten structure emerged in the welding joint.Moisture of welding rod,oil and rust on weldment surface and constrained stress of welding joint could also effect the generation of cold ... |
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| Keywords: | automobile dissimilar steels welding joint cold crack quench hardening microstructure |
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