摘要
采用交流氩弧焊对AM50镁合金进行焊接,研究结果表明,当电流达到一定值时,出现焊接热裂纹。热裂纹的产生是由于焊缝金属中出现粗大的晶间低熔点α+β-Mg17Al12共晶体所致。为防止焊接热裂纹的产生,应在工艺允许的情况下,尽量减少焊接线能量。
The GTAW was used to weld AM50 magnesium alloy. The test result show that hot cracking will appear when the welding current is over one point. The reason of hot cracking produced is α＋β→Mg17Al12 phase appearing in welding line.In order to prevent hot cracking,we can reduce welding energy.
出处
《热加工工艺》
CSCD
北大核心
2006年第7期11-12,共2页
Hot Working Technology
关键词
镁合金
氩弧焊
热裂纹
magnesium alloy
GTAW
hot cracking
