摘要
C-276合金在氧化性和非氧化性酸中都具有很好的耐腐蚀性,所以在精对苯二甲酸(PTA)装置中应用较多。在化工容器设计时,虽然没有明确规定哪些场合使用复合板或堆焊,但是,考虑到堆焊层是铸造枝晶状奥氏体组织,复合板是轧制孪晶奥氏体组织,而且堆焊的热过程比复合的热过程复杂。以C-276钢板为参考,研究了C-276合金冷金属过渡(CMT)焊接焊缝熔敷金属的耐蚀性,供PTA装置制造厂参考。
C -276 alloy has good corrosion resistance in oxidizing and non -oxidizing acids, so it is wide-ly used in purified terephthalic acid (PTA) device. In the chemical vessel design, it does not specify the using of composite board or surfacing. Considering the surfacing layer microstructure is dendritic austen ite, the composite board microstructure is twinned austenite, and the thermal process of welding is complex than that of composite. We have study C - 276 weld metal corrosion resistance ater cold metal transfer (CMT) welding,which is useful for PTA device fabrication.
出处
《压力容器》
2013年第11期23-28,共6页
Pressure Vessel Technology
基金
中国科学院重点部署项目(KGZD-EW-xxx-2)
关键词
C-276
冷金属过渡
熔敷金属
耐蚀性
析出相
C - 276
cold metal transfer(CMT)
weld metal
corrosion resistance
precipitated phase