碳迁移对镍基和奥氏体焊条焊接的Cr5Mo异种钢焊接接头蠕变破断寿命的影响  

Effect of Carbon Migration on Creep Rupture Time of Cr5Mo Dissimilar Welded Joints using Ni-based and Austenitic Weld Metal

作　　者：巩建鸣[1] 姜勇[1] 涂善东[1] 

机构地区：[1]南京工业大学机械与动力工程学院

出　　处：《材料工程》2003年第10期19-22,共4页Journal of Materials Engineering

基　　金：国家自然科学基金资助项目 ( 10 172 0 46)

摘　　要：基于节约费用和施工方便的考虑,工程应用中常采用异种钢焊接。Cr5Mo异种钢焊接接头广泛应用于炼油、石油化工等过程工业中的高温环境。针对镍基和奥氏体焊条焊接的Cr5Mo异种钢焊接接头,通过时效处理和蠕变持久实验,研究了碳迁移对蠕变破断强度与时间的影响。研究表明,奥氏体焊条焊接的Cr5Mo异种钢焊接接头由于碳迁移蠕变破断强度下降,破断寿命减少,约为镍基焊条焊接的Cr5Mo异种钢焊接接头蠕变破断寿命的50%。Based on the consideration of economy and being easy to construct on site, dissimilar welded joints are usually used in engineering application Cr5Mo dissimilar welded joints are widely used at elevated temperature in the oil refining and petrochemical installation In this paper,the effect of carbon migration on creep rupture strength and time of Cr5Mo dissimilar welded joints with Nibased and austenitic weld metal is studied by thermal aging treatment and long term creep testing The results show that creep rupture time of Cr5Mo dissimilar welded joints with austenitic weld metal decrease due to carbon migration and is about 50% of that with Nibased weld metal

关 键 词：异种钢焊接接头 蠕变 碳迁移 镍基焊缝金属 

分 类 号：TG142.1[一般工业技术—材料科学与工程] O344.6[金属学及工艺—金属材料]