摘要
16Mn换热器管板埋弧焊堆焊不锈钢时易出现热裂纹,分析其产生原因是:熔合比较大引起堆焊焊缝局部含碳量偏高、碳迁移引起堆焊焊缝形成增碳层、拉应力的产生。改进焊接工艺,包括焊材选用、焊接电流、焊接速度等,有效防止了热裂纹的产生。
As stainless steel surfacing on the 16Mn heat exchanger tube sheet by submerged arc welding,there exists some cracks frequently. Analysis of the reasons are fusion caused by surfacing weld local containing carbon content,high carbon migration caused by surfacing weld formation of earburized layer and tensile stress and improve welding process,mainly including the selection of welding material, welding current, welding speed, etc, which effectively prevent the formation of the thermal crack.
出处
《电焊机》
2016年第6期112-114,共3页
Electric Welding Machine
关键词
换热器管板
堆焊
不锈钢
热裂纹
heat exchanger tube sheet
cladding
stainless steel
hot crack
