摘要
探究了道间温度和焊接道数对自保护药芯焊丝熔敷金属组织和韧性的影响。结果表明,随着道间温度的提高,组织中的先共析铁素体增多,M-A岛内的奥氏体先增多而后又转变为碳化物,这使得冲击吸收能量先增大后减小。随着焊接道数的增加,冲击吸收能量增大,这主要是由于组织中M-A岛的尺寸和含量都减小,细晶区所占的比例增大造成的。
The effects of interpass temperature and weld passes on the microstructure and toughness of deposited metals by self-shielded flux cored wires were investigated in the paper. The results indicated that with the increase of interpass temperature,the pro-eutectoid ferrite amount increases,the austenite amount increases first and then transforms into carbide in martensite austenite island,which results in the impact toughness increasing firstly and then decreasing. The toughness of deposited metals is increased with the increase of welding layer,which attributes to the reduction of size and content of martensite austenite island as well as the increase of ratio of fine grain zone.
出处
《焊接》
2018年第5期48-52,共5页
Welding & Joining
关键词
自保护药芯焊丝
道间温度
焊接道数
组织
韧性
self shielded flux cored wire
interpass temperature
weld pass
microstructure
toughness
