Effect of solid-solution temperature on the microstructure of Fe-Ni based high strength low thermal expansion (HSLTE) alloy

查看全文 作　　者：Yifan [1,2]Tu;Jin [2]Xu;Jianfu [2]Zhang;Boping [1]Zhang;Dongliang [2]Zhao

机构地区：[1]Central Iron & Steel Research Institute, Beijing 100081, China;[2]Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China

出　　处：《Journal of University of Science and Technology Beijing》索引2007年第14卷第1期,共6页

基　　金：This work was financially supported by the S&T Research Development Project of the Ministry of Science and Technology, China (No.05021050). 摘　　要：The influence of solid-solution temperature on the dissolution of carbide precipitates, the average grain size and the micro- hardness of the austenite matrix in an Fe-Ni based high strength low thermal expansion (HSLTE) alloy was investigated to obtain the proper temperature range of the solid-solution process. The XRD analysis, microstructure observations, and the theoretical calculations showed that the Mo-rich M2C-type precipitates in the Fe-Ni based HSLTE alloy dissolve completely at about 1100°C. The average grain size of the studied alloys increases from 14 to 46 μm in the temperature range of 1050 to 1200°C. The microhardness of the matrix decreases first for the sake of solid-solution treatment, but then increases later with increasing solution temperature because of the so- lution strengthening effect. 关键词：铁镍基合金高强度低热膨胀合金固溶温度显微结构碳化物溶解

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Effect of solid-solution temperature on the microstructure of Fe-Ni based high strength low thermal expansion (HSLTE) alloy

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