新型耐热合金C-HRA-3高温时效过程析出相成分特征分析  

Analysis of Composition Characteristics of Precipitation Phases of New Heat Resistant Alloy C-HRA-3 during High Temperature Aging Process

作　　者：陈正宗[1] 刘正东[1] 包汉生[1] CHENG Zhengzong;LIU Zhengdong;BAO Hansheng

机构地区：[1]钢铁研究总院有限公司特殊钢研究院,北京100081

出　　处：《大型铸锻件》2024年第5期11-13,共3页Heavy Casting and Forging

基　　金：国家重点研发计划(2017YFB0305200)。

摘　　要：针对C-HRA-3耐热合金在700℃和750℃时效后的试样研究了M_(23)C_(6)碳化物和γ′相化学相组成变化规律。结果表明:C-HRA-3合金经高温时效后析出M_(23)C_(6)碳化物和γ′相,其中M_(23)C_(6)碳化物中合金元素M为Cr、Mo、Ni和Co,γ′相中合金元素有Ni、Co、Al、Ti、Mo、Cr和Nb,时效至8000 h后,700℃时效后M_(23)C_(6)碳化物析出量约0.978%,γ′相析出量约9.5%;750℃时效后,M_(23)C_(6)碳化物析出量约1.023%,γ′相析出量约6.753%,随时效温度升高,M_(23)C_(6)碳化物析出量增加约4.6%,γ′相析出量减小约28.9%。This article investigates the change laws in the chemical phase composition of M_(23)C_(6) carbides andγ′phase in specimens of C-HRA-3 heat-resistant alloy after aging at 700℃and 750℃.The results showed that it precipitated M_(23)C_(6) carbides andγ′phase of the C-HRA-3 alloy after high-temperature aging.The alloying elements M in the M_(23)C_(6) carbides were Cr,Mo,Ni,and Co,while the alloying elements in theγ′phase were Ni,Co,Al,Ti,Mo,Cr,and Nb.After aging for 8000 hours at 700℃,the precipitation of M_(23)C_(6) carbides was about 0.978%,and the precipitation ofγ′phase was about 9.5%.After aging for 8000 hours at 750℃,the precipitation of M_(23)C_(6) carbides was about 1.023%,and the precipitation ofγ′phase was about 6.753%.As the aging temperature increased,the precipitation of M_(23)C_(6) carbides increased by about 4.6%,and the precipitation ofγ′phase reduced by approximately 28.9%.

关 键 词：C-HRA-3耐热合金 高温时效 化学相 M_(23)C_(6)碳化物 γ′相 

分 类 号：TG156[金属学及工艺—热处理] TG132.33[金属学及工艺—金属学]