国产化材料车轮钢圈焊接工艺的确定  

Determination of Welding Process for Wheel Rims Using Domestic Materials

作　　者：熊春英[1] 张亚舫[1] 罗学泉[1] 陈剑[1] 唐新民[1] 

机构地区：[1]江铃汽车股份有限公司,南昌330052

出　　处：《机械工程材料》2014年第12期50-53,86,共5页Materials For Mechanical Engineering

摘　　要：为了实现汽车钢圈用材料的国产化,对材料国产化前后钢圈焊接工艺及其焊缝显微组织与车轮的疲劳寿命进行了研究,对焊接工艺进行了改进。结果表明:原焊接工艺钢圈车轮的疲劳寿命较低,远远不能满足技术要求,主要原因是焊缝中存在较大的氢气孔及焊接热输入量过大;增加去氢处理后,焊缝中气孔消失,再通过降低焊接电压以减少热输入,同时适当降低焊接速度,可明显提高不同材料车轮的疲劳寿命,使国产材料钢圈的质量达到要求。The welding processes for wheel rims using domestic materials and imported material were studied as well as the microstructure of weld seam and the fatigue life of wheels,in order to achieve localization of rim materials.The results show that the fatigue life of rims welded by the original welding process was low,which cannot meet the technical requirements,mainly because there were some big hydrogen holes in the weld and the welding heat input was excessive.After plus the dehydrogenation process,the pores in the weld disappeared.Reducing the heat input by the decrease of welding voltage and reducing welding speed properly could significantly increase the fatigue life of wheels using different materials,which made the quality of wheel rims using domestic material meet the requirements.

关 键 词：焊接工艺 疲劳寿命 焊缝 车轮钢圈 

分 类 号：TG446[金属学及工艺—焊接]