等离子MIG焊接铝合金的规范优化及组织分析  

Normative optimization and tissue analysis of Al-alloy of PLASMA-MIG welding

作　　者：田云[1] 李德元[1] 董晓强[1] 王赫莹[1] 赵春元[2] 

机构地区：[1]沈阳工业大学材料科学与工程学院,辽宁沈阳110023 [2]沈阳工程学院,辽宁沈阳110036

出　　处：《沈阳工业大学学报》2004年第5期502-505,共4页Journal of Shenyang University of Technology

基　　金：辽宁省教育厅高校科研基金项目(20142219)

摘　　要：通过对等离子MIG焊接铝合金的规范进行试验分析,得出不同的焊接规范对焊缝成型和组织的具体影响.结果表明:在其它条件不变时,焊接总电流增大,焊缝宽和熔深都增加,Al Mg合金的晶粒度变粗,且分布趋向不均匀,Al Si合金所受影响较小;焊接总电流不变,等离子弧电流增加,而MIG弧电流减小,焊缝宽和熔深都减小,Al Mg合金的组织基本没有变化,而Al Si合金的晶粒度却随着MIG弧电流的减小而变细.By analysis of Al-alloy specification of PLASMA-MIG welding, elicits concrete influence on welding-seam molding and tissue with different welding specification .The results testify: when other conditions hold the line ,with the augmentation of welding general current,weld breadth and weld depth enhance,the size of crystal grain of Al-Mg alloy becomes rough and the distribution is asymmetry,but the influence on Al-Si alloy is very little; for invariable welding general current, increasing PLASMA-arc current, decreasing MIG-arc current, it is found that weld breadth and depth minish,the tissue of Al-Mg alloy almost holds the line, but the size of crystal grain of Al-Si alloy becomes fine with the decreasing MIG-arc current.

关 键 词：等离子MIG焊 铝合金 焊缝成型 

分 类 号：TG457[金属学及工艺—焊接]