两种不同比例的气体保护焊对汽车底盘构件性能的影响  

The Influence of Two Different Proportions of Gas Shielded Welding on the Performance of Automobile Chassis Components

作　　者：闫超杰[1] YAN Chao-jie(Min Xi Vocational&Technical College,Longyan 364021,China)

机构地区：[1]闽西职业技术学院信息与制造学院,福建龙岩364021

出　　处：《辽宁科技学院学报》2020年第3期11-13,共3页Journal of Liaoning Institute of Science and Technology

基　　金：2018年福建省中青年教师教育科研项目(职业院校专项)(JZ181052).

摘　　要：采用低倍组织观察、测定焊道表面形状、模拟应力集中、循环盐雾腐蚀试验和弯曲疲劳试验等实验方法,分析对比了Ar-20%CO2和Ar-5%CO2两种不同混合比例的气体保护焊对汽车底盘构件焊接性能的影响。结果表明,Ar-5%CO2混合气体保护电弧焊,能够改善焊趾形状、提高底盘部件焊接接头耐蚀性和疲劳强度。The effects of Ar-20%CO2 and Ar-5%CO2 on the welding performance of automobile chassis components were analyzed and compared by means of low power structure observation,measurement of weld bead surface shape,simulated stress concentration,cyclic salt spray corrosion test and bending fatigue test.The results show that Ar-5%CO2 mixed gas arc welding can better the shape of weld toe and improve the corrosion resistance and fatigue strength of the welded joint of chassis parts.

关 键 词：CO2 混合气体保护焊 汽车底盘 焊接性能 

分 类 号：U463.1[机械工程—车辆工程]