新型镍基耐热合金C-HRA-3的热力学计算  

Thermodynamic calculation of a novel nickel-based heat-resistant alloy C-HRA-3

作　　者：张鹏 陈正宗[3] Zhang Peng;Chen Zhengzong(School of Materials Science and Engineering,Northeastern University,Shenyang Liaoning 110819,China;Fushun Special Steel Co.Ltd.,Fushun Liaoning 113001,China;Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China)

机构地区：[1]东北大学材料科学与工程学院,辽宁沈阳110819 [2]抚顺特殊钢股份有限公司,辽宁抚顺113001 [3]钢铁研究总院有限公司,北京100081

出　　处：《金属热处理》2024年第12期268-273,共6页Heat Treatment of Metals

基　　金：国家新材料生产应用示范平台项目(TC210H022)。

摘　　要：通过对新型镍基耐热合金C-HRA-3中主元素含量变化进行热力学计算,对其在各温度下可能析出的第二相特征开展分析。结果表明:C-HRA-3合金中主要析出相有γ′和M_(23)C_(6),其中700℃时γ′相的析出量约3.7wt%,M_(23)C_(6)相的析出量约1.11wt%。C元素对M_(23)C_(6)相的析出量、回溶温度以及合金的熔点有显著影响。Co元素对析出相和熔点的影响较小。Mo元素对M_(6)C相的析出行为有决定性作用。Al和Ti含量的增加会明显增加γ′相的析出量和回溶温度。Nb元素对γ′相的析出量没有影响,但对Nb在γ′相的组成元素占比有显著影响。By conducting thermodynamic calculations on the changes in the content of main elements in a novel nickel-based heat-resistant alloy C-HRA-3,the possible characteristics of the second phase that might precipitate at various temperatures were analyzed.The results show that the main precipitated phases in C-HRA-3 alloy areγ′and M_(23)C_(6),with a precipitation amount of approximately 3.7wt%forγ′phase and 1.11wt%for M_(23)C_(6)phase at 700℃.The C element has a significant impact on the precipitation amount,redissolution temperature and melting point of M_(23)C_(6)phase in the alloy.The effect of Co element on the precipitation phase and melting point is relatively small.The Mo element plays a decisive role in the precipitation behavior of M_(6)C phase.The increase in Al and Ti content will significantly increase the precipitation amount and redissolution temperature of theγ′-phase.The Nb element has no effect on the precipitation amount ofγ′-phase,but has a significant impact on the proportion of Nb in the composition elements of theγ′-phase.

关 键 词：C-HRA-3耐热合金 热力学计算 析出相 

分 类 号：TG142.33[一般工业技术—材料科学与工程]