汽车散热器铝合金管开裂原因  

The cause of cracking of the aluminum alloy tube in the automobile radiator

作　　者：郭鹤[1] 孙继飞[1] 丁响雷 徐瑞[1] 张得军 孙建新[1] 

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442002

出　　处：《轻合金加工技术》2016年第1期33-36,共4页Light Alloy Fabrication Technology

基　　金：国家级大学生创新训练计划项目;湖北省大学生创新训练计划项目(201410525008);湖北汽车工业学院2014年重大科研项目预研基金资助计划(2014XY03)

摘　　要：针对汽车散热器铝合金管圆角处出现开裂的现象,从汽车散热器管的开裂形式着手,结合铝合金管的原带材的材质、焊管的力学性能及组织结构,分析了其组织脆化、缺口效应与应力集中三大因素对铝合金管开裂的影响。探讨了散热器管的开裂原因。从原材料成分、成形与钎焊工艺等方面提出了防控散热器铝合金管开裂的办法。According to the cracking appeared in the comer of the aluminum alloy tube in the automobile radiator, we confirmed the crack type at first, combined material compositions, microstructure and mechanical properties of the aluminum alloy welded tubes, and studied the three major factors （local brittleness, notch effect and stress concentration ） influencing cracking. The causes of radiator cracking were discussed. Then the measures to prevent cracking were put forward on the aspects of material compositions, forming and the soldering process.

关 键 词：散热器 铝合金 焊管 开裂 

分 类 号：U464.138.2[机械工程—车辆工程] TG441.7[交通运输工程—载运工具运用工程]