不锈钢氩-氦混合气MAG自动焊工艺  

Ar-He MAG automatic welding of stainless steel

作　　者：万骏 宋伟 孙耀华 侯春杰 韩邦卿 张婧 WAN Jun;SONG Wei;SUN Yaohua;HOU Chunjie;HAN Bangqing;ZHANG Jing(Shanghai Aerospace Equipments Manufacturer,Shanghai 200245,China)

机构地区：[1]上海航天设备制造总厂,上海200245

出　　处：《电焊机》2018年第10期86-88,共3页Electric Welding Machine

基　　金：上海市青年科技启明星计划(18QB1401700)

摘　　要：以φ(Ar)78%+φ(He)20%+φ(CO_2)2%混合气体作为保护气体,对16 mm厚304L不锈钢进行MAG自动焊工艺参数研究。结果表明:采用短路过渡时电弧不稳定,飞溅较大,容易产生气孔缺欠;采用射流过渡时电弧较稳定,无气孔,但是氦气的加入容易出现咬边现象;采用平均电流240 A的脉冲电流焊接时可以获得满足要求的焊缝质量。φ （Ar） 78%＋φ （He） 20%＋φ（CO2） 2% shielded MAG automatic welding was proposed to study the effects of welding parametersby using 16mm thickness 304L stainless steels. The results showed that short circuiting transfer can lead to the unstable electric arc andexcessive spatter. Besides, porosities were observed in the weld. The stable electric arc can be obtained by using spray transfer, but thehelium arc could cause undercut. Finally, the weld quality was satisfactory by using the average current of 240A.

关 键 词：不锈钢 氩-氦 焊接参数 脉冲电流 自动焊 

分 类 号：TG444.72[金属学及工艺—焊接]