摘要
通过使用钛硼微合金化以获得韧性组织焊缝、提高焊条药皮碱度以净化焊缝等手段,可使屈服强度级别为785 MPa的手工焊条熔敷金属-50℃冲击吸收功AKV平均值超过80 J。但焊条药皮碱度过高时,AKV(-50℃)值没有明显增加,而且对降低熔敷金属扩散氢不利。采用对焊条药皮原材料进行分类高温去水处理,对成品焊条多次烘干吸湿烘干处理后,反复测定。结果表明,当焊条药皮碱度在2.2~2.4之间时,熔敷金属可同时具有高屈服强度、高低温冲击吸收功及超低扩散氢。
After some methods being applied to the electrode which yield strength exceeds 785 MPa,the impact work of its deposited metal at-50 ℃ may averagely exceed 80 J.These methods are adding a small quantity of titanium and boron into deposited metal to form toughness micro-structure,or increasing the covering ba-sicity to purify the weld metal.However,when the covering basicity is excessively high,the impact work at-50 ℃ can t increase any more;and the increase of the covering basicity makes against decreasing t...
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2008年第5期18-20,24+113-114,共6页
Transactions of The China Welding Institution
关键词
高强度
冲击吸收功
扩散氢
药皮碱度
high strength
impact work
diffusible hydrogen
covering basicity
