电弧超声埋弧焊改善09MnNiDR焊缝组织性能  

Study on Arc-ultrasonic SAW Improving Structure and Property of 09MnNiDR Welding Joint

作　　者：杨博宇[1] 郝红伟[2] 李路明[2] 吴敏生[1] 王胜 

机构地区：[1]清华大学机械工程系 [2]清华大学航天航空学院,北京100084 [3]张家港化工机械有限公司,江苏张家港100084

出　　处：《热加工工艺》2006年第7期1-3,共3页Hot Working Technology

基　　金：国家自然科学基金资助项目(50375080)

摘　　要：作为焊接电弧的热源,对其施加高频调制后可变成可控的超声发射源。通过对比常规SAW和电弧超声作用下SAW的09MnNiDR焊缝组织,发现电弧超声能够减小埋弧焊焊缝区的柱状晶尺寸和先共析铁素体的晶粒大小,同时低温冲击实验结果表明,电弧超声能够显著提高09MnNiDR焊缝区的冲击吸收功。As the heat resource of welding, arc excited by high frequency modulation could emit ultrasonic. Compared with conventional SAW, the metallurgical structure of arc-ultrasonic SAW could be refined, especially the grain size of columnar crystals and pro-entectoid ferrite in weld zone is reduced. At the same time the results of lowtemperature impact experiments showed that arc-ultrasonic can remarkably improve the impact strength of weld zone.

关 键 词：电弧超声 SAW 冲击吸收功 

分 类 号：TG445[金属学及工艺—焊接]