Effect of Co addition on the microstructure and creep properties of 12% Cr heat-resistant steels
The effects of Co addition on microstructure and creep rupture properties of 12% Cr ferritic heat-resistant steels were investigated.We found that added Co effectively suppressed the formation of δ-ferrite and the creep rupture strength at 650℃ was gradually increased.The added Co content was observed to improve the amount of W and Mo elements contained in the M23C6 type precipitates,which promoted the precipitation of Laves phase during creep test.At the same time,Co also increased the amount of Nb in the MX carbides and amount of MX precipitation,which suppressed the coarsening of martensite lath width and further precipitates during creep test.
Co creep rupture strength δ-ferrite M23C6 MX Laves phase
Wang Qijiang Yoshiaki Toda Hong Jie Toru Hara Gao Jiaqiang Fuxing Yin Yao Lei Fujio Abe
Steel Tube Division,Baosteel Reaserch Institute,Baoshan Iron &Steel Co.,Ltd,Shanghai 201900,China National Institute for Materials Science,Sengen,Tsukuba,Ibaraki,Japan
国际会议
上海
英文
655-659
2008-09-26（万方平台首次上网日期，不代表论文的发表时间）