摘要
高压换热器中接管材质为12Cr2Mo1R(低合金耐热钢)与外部管线材质0Cr18Ni10Ti(奥氏体不锈钢)异种钢相焊,由于金属组织和化学成分都不相同,物理性能差别较大,焊接时易出现多方面的问题。通过焊接试验,确定了低合金耐热钢(12Cr2Mo1R)与奥氏体不锈钢(0Cr18Ni10Ti)相焊时,在低合金耐热钢侧预先采用镍基焊接材料堆焊一层隔离层,可有效防止凝固过渡层的形成和碳迁移的出现,而且低合金耐热钢堆焊后可以进行热处理而不必考虑对奥氏体钢的影响。试验结果表明所制定的焊接工艺可获得满意的焊接接头质量。
For welding the low alloy heat resistance steel with austenitic stainless steel of the high pressure heat exchanger,because of the difference from metal microstructure,chemical composition and mechanical properties.It can cause many problems.Overlaying Nickel-alloys on the low alloy heat resistance steel side can prevent forming freezing transition layer and carbon migration, and do not need to consider the effect of the PWHT to austenitic stainless steel.The article gains a reasonable welding procedure overlaying Nickel-alloy buttering on the low alloy heat resistance steel side by experiments for the welding the low alloy heat resistance steel with austenitic stainless steel.
出处
《电焊机》
北大核心
2009年第4期148-150,共3页
Electric Welding Machine
关键词
镍基合金
稀释
碳迁移层
残余应力
Nickel-alloys
dilution
carbon migration
residual stress
