摘要
以高、中、低3种铌含量的S31042耐热钢作为试验钢,研究了铌含量对S31042钢中析出相及持久性能的影响。结果表明:S31042钢时效处理后,钢中主要含有M_(23)C_6相、Z相和MX相;当时效时间达到10 000 h时,钢中发现了σ相的存在。铌含量对S31042钢中析出相的种类和M_(23)C_6相的含量影响不大,对含铌相含量的影响显著,随着铌含量的升高,Z相+MX相含量明显增多。700℃持久寿命并未随铌含量的升高而单调增加,而在中限铌含量出现最大值,高铌钢中未固溶的粗大一次析出相是造成持久寿命降低的主要原因。
The precipitated phases and creep rupture properties of S31002 steel with different niobium content were studied. The results show that the major precipitates of the steel after aging are M23 C6 carbides, Z phase and MX phase, and σ phase is found in the steel after aging for 10 000 h. Kinds of precipitates and the amount of M23C6 carbides have little influence with different niobium content, while the amount of Z ＋ MX phase increase obviously with the increase of niobium content. At 700 ℃, the creep rupture life of the steel isn＇t monotonically increase with niobium content, and it is reached the maximum at middle niobium content. The bulky prime precipitates in high niobium content steel are responsible for the decrease of creep rupture life.
作者
王斌
梁军
荆洪阳
刘正东
程世长
王敬忠
Wang Bin Liang Jun Jin Hongyang Liu Zhengdong Cheng Shichang Wang Jingzhong(Shenhua Guohua （Beijing） Electric Power Research Institute Co. , Ltd. , Beijing 100025, China School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China Institute of Special Steel, China Iron and Steel Research Institute Group, Beijing 100081, China School of Metallurgical Engineering, Xi＇an University of Architecture and Technology, Xi＇an Shaanxi 710055, China)
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第12期58-62,共5页
Heat Treatment of Metals
关键词
铌含量
S31042钢
长时时效
析出相
持久性能
niobium content
S31042 steel
long term aging
precipitates
creep rupture properties
