镍基高温合金GH141平衡析出相的热力学计算分析  

Thermodynamic Calculation of Equilibrium Precipitation Phases in GH141 Ni-based Superalloy

作　　者：徐敏[1] 杨武强[1] 张斌[2] 张麦仓[1] 孟晔[1] 胥国华[3] 郑磊[1] Xu Min Yang Wuqiang Zhang Bin Zhang Maieang Meng Ye Xu Guohua Zheng Lei(University of Science and Technology Beijing, Beijing 100083, China State Administration of Science, Technology and Industry for National Defence, Beijing 100037, China Central Iron and Steel Research Institute, Beijing 100081, China)

机构地区：[1]北京科技大学,北京100083 [2]国家国防科技工业局,北京100037 [3]钢铁研究总院,北京100081

出　　处：《稀有金属材料与工程》2016年第11期2925-2931,共7页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51001011);霍英东教育基金会(141043);中央高校基本科研业务费(FRF-TP-12-042A)

摘　　要：应用Thermo-Calc热力学计算软件,对GH141合金的平衡析出相和非平衡凝固过程进行了模拟计算。结果表明:GH141合金的平衡析出相有γ、γ′、σ、μ和碳化物(M C、M_6C、M_(23)C_6);合金凝固过程中Mo、Ti元素正偏析比较严重,这会降低合金的初熔点;Al、Ti含量对γ′相的开始析出温度和最大析出量有很大影响;C是碳化物最大析出量的控制元素,且M C、M_6C、M_(23)C_6碳化物的主要富集元素分别是Ti、Mo、Cr。研究结果为合金的成分设计和热处理提供一定的理论依据。The equilibrium precipitation phases and the process of non-equilibrium solidification for GH141 Ni-based superalloy were studied by Thermo-Calc software. The main precipitation phases include γ, γ′, σ, μ and carbides（M C, M6C and M23C6）. Significant positive segregation of Mo and Ti may occur during solidification based on the calculation, which would decrease the initial melting points of GH141 Ni-based superalloy. The contents of Al and Ti can strongly influence the solvus temperature and the maximum mass fraction of γ′phase. C is the main control element of the maximum mass fraction of carbides（M C, M6C and M23C6） and the enriched elements of M C, M6C and M23C6 are Ti, Mo and Cr, respectively. Research results can provide a theoretical basis for composition design and heat treatment.

关 键 词：GH141合金 THERMO-CALC软件 平衡析出相 

分 类 号：TG132.3[一般工业技术—材料科学与工程]