摘要
奥氏体不锈钢作为压水堆堆内一次循环构件的材料在核电工业领域起重要作用,核电的发展对奥氏体不锈钢的性能提出了更高要求。利用热力学计算软件Thermo-calc探究了微合金化元素Nb、Ti、W和Zr对奥氏体不锈钢中σ析出相和M_(23)C_(6)析出相的影响。结果表明:Nb、Ti、Zr均可有效抑制σ相的析出,W则会促进σ相的析出。在分析变化范围,Nb、Ti、W和Zr的4种元素含量均对M_(23)C_(6)析出相基本无影响。在此基础上,使用并行计算方法,完成了Zr-Ti、Zr-W、Zr-Nb、Ti-W、Ti-Nb和W-Nb 6种两元素成分变化对σ析出相和M_(23)C_(6)析出相的热力学计算和分析。
Austenitic stainless steel plays an important role in the nuclear power industry as a material of primary circulation components in the pressurized water reactor stack.The development of nuclear power has put forward higher requirements on the performance of austenitic stainless steel.The thermodynamic calculation software Thermo-calc was used to explore the effects of microalloying elements Nb,Ti,W and Zr on the precipitation phase of M_(23)C_(6) and the precipitation phase ofσphase in austenitic stainless steel.The results show that Nb,Ti and Zr can effectively suppress the precipitation ofσphase,and W promotes the precipitation ofσphase.In the analysis change range,the contents of the four elements Nb,Ti,W and Zr have almost no effects on the precipitation phase of M_(23)C_(6).On this basis,using the parallel computing method,the calculation and analysis of the six two-element composition changes of Zr-Ti,Zr-W,Zr-Nb,Ti-W,Ti-Nb and W-Nb on theσprecipitated phase and M_(23)C_(6) precipitated phase by Thermodynamic has finished.
作者
王来成
蔡洪能
孟令齐
WANG Laicheng;CAI Hongneng;MENG Lingqi(State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China)
出处
《热加工工艺》
北大核心
2021年第20期39-43,共5页
Hot Working Technology
