预热对LY12铝合金摩擦叠焊质量的影响  

Influence of Preheating on Friction Stitch Welding Quality of LY12 Aluminum Alloy

作　　者：高辉[1] 焦向东[1] 周灿丰[1] 陈家庆[1] 占宏伟[1] 张艳清[1] 

机构地区：[1]北京石油化工学院机械工程学院,北京102617

出　　处：《上海交通大学学报》2010年第S1期70-72,76,共4页Journal of Shanghai Jiaotong University

基　　金：国家高技术研究发展计划(863)项目(2006AA09Z329);北京市新世纪千百万人才工程资助项目

摘　　要：为了解决铝合金材料在摩擦叠焊过程中由于焊接初始阶段产热不足,容易在底部产生焊接缺陷的问题,进行了预热对LY12硬铝合金摩擦叠焊焊接质量影响的实验.焊接实验对塞棒和基块无预热和预热温度分别为100和200°C的条件下进行焊接.焊接时主轴转速为4 000 r/min,塞棒进给速度为30 mm/min,氩气流量为30 L/min.通过对不同实验条件下试件的宏观照片及焊接填充区硬度值进行对比,分析了预热对LY12硬铝合金摩擦叠焊焊接质量的影响.结果表明,在铝合金摩擦叠焊过程中,通过对塞棒和基块进行预热能够明显减少焊接缺陷,提高焊接质量.In initial stage of friction stitch welding process for aluminum alloy material,the defect is liable due to inadequate heating input.In order to solve the problem,the experiments were done without preheating,with 100 °C preheating, and 200 °C preheating respectively.The rotational speed is 4 000 r/min,feed speed 30 mm/min,argon flow 30 L/min.By comparing the macroscopic photos and hardness at the filled area under different test conditions,the influence of preheating on the welding quality for LY 12 aluminum alloy was analyzed. The results show that the defect can be reduced obviously and the welding quality can be improved while the work-pieces are preheated during the welding process.

关 键 词：铝合金 摩擦叠焊 预热 

分 类 号：TG453.9[金属学及工艺—焊接]