镍基耐蚀Hastelloy G3合金的组织特征及热力学计算  

Microstructure Characteristics and Thermodynamic Calculation of Nickel-based Corrosion Resistant Hastelloy G3 Alloy

作　　者：赵振铎[1] 李莎[1] 范光伟[1] 李建春[2] Zhao Zhenduo;Li Sha;Fan Guangwei;Li Jianchun(State Key Laboratory of Advanced Stainless Steel Materials,Taiyuan Iron and Steel(Group)Co.,Ltd,Taiyuan 030003,China;Technology Center,Shanxi Taigang Stainless Steel Co.,Ltd,Taiyuan 030003,China)

机构地区：[1]太原钢铁(集团)有限公司先进不锈钢材料国家重点实验室,山西太原030003 [2]山西太钢不锈钢股份有限公司技术中心,山西太原030003

出　　处：《稀有金属材料与工程》2020年第9期2983-2990,共8页Rare Metal Materials and Engineering

基　　金：The Youth Top Talents Support Project of Shanxi Province(201606);The Natural Science Foundation of Shanxi Province(201801D121081)。

摘　　要：利用Thermo-Calc软件对镍基耐蚀Hastelloy G3合金进行了热力学计算,系统研究了成分对平衡相析出的影响规律,并通过SEM和TEM对合金时效处理后的析出相进行了观察。结果表明,合金析出的平衡相主要为σ相、μ相、M6C和M23C6;Cr和Mo的含量主要影响σ相和μ相的析出和初始析出温度;而C元素含量显著影响碳化物M6C和M23C6的析出行为;通过实验进一步研究了时效过程中析出相的析出规律。Thermo-Calc software was used to calculate the thermodynamics of nickel-based corrosion resistant Hastelloy G3 alloy,and the influence of composition on the precipitation of equilibrium phase was studied.The precipitated phase of the alloy after aging treatment was observed by SEM and TEM.The results show that the equilibrium phases of alloy precipitation are mainlyσphase,μphase,M6 C and M23C6 carbides;the content of Cr and Mo mainly affect the precipitation ofσphase andμphase and the initial precipitation temperature;while the content of C significantly affects the precipitation behavior of carbides M6 C and M23C6.The precipitation rule of precipitates during the aging process was further studied through experiments.

关 键 词：Hastelloy G3合金 热力学计算 析出相 时效处理 

分 类 号：TG133.4[一般工业技术—材料科学与工程]