李景阳,董建新,姚志浩,张麦仓.镍基耐蚀合金925均匀化及固溶过程组织演变规律[J].稀有金属材料与工程,2018,47(7):2080~2086.[Li Jingyang,Dong Jianxin,Yao Zhihao,Zhang Maicang.Microstructure Evolution of 925 Alloy during Homogenisation and Solution Treatment[J].Rare Metal Materials and Engineering,2018,47(7):2080~2086.]
镍基耐蚀合金925均匀化及固溶过程组织演变规律
投稿时间:2016-07-07  修订日期:2016-08-31
中文关键词:  高温合金  925 合金  固溶  均匀化
基金项目:国家“863”计划资助(项目号 2013AA031005 )
中文摘要:
      为研究925合金在均匀化及固溶过程中组织演变规律,利用金相显微镜、扫描电镜和能谱分析等对经真空感应熔炼(VIM)和保护气氛下电渣重熔(ESR)双联工艺冶炼的925合金的原始铸态、均匀化态、锻态和固溶态的组织和析出相进行分析。结果表明:铸态组织中含有TiN、MC、γ′相、σ相以及η相;1160℃退火5h可使γ′相、σ相及η相回溶,退火20h偏析基本消除;在950-1070℃固溶过程中,M23C6相在晶界析出量逐渐减少,1040℃以上晶粒急剧长大。
Microstructure Evolution of 925 Alloy during Homogenisation and Solution Treatment
英文关键词:Superalloy  925 alloy  Solution treatment  Homogenisation
英文摘要:
      In order to investigate the microstructure evolution of 925 alloy during homogenization and solution treatment, nickel-based superalloy 925 alloy ingots of vacuum-induction-melting and electroslag-remelting were prepared and homogenization and solution tests were carried out. The microstructure and precipitations of 925 samples were studied by optical microscopy,scanning electron microscopy,and energy dispersive spectroscopy.It is found that there exist phases such as TiN, MC, σ phase, γ′ phase and η phase in the ingots, and σ phase, γ′ phase and η phase can be remelted in 1160℃ after 5h. After homogenization at 1160℃ for 20 h,this segregation can almost be eliminated. In solution treatment range of 950℃ to 1070℃, the amount of grain boundary precipitation of M23C6 decreases gradually and the grain size increases quickly.
作者单位E-mail
李景阳 北京科技大学 laverde@live.cn 
董建新 北京科技大学  
姚志浩 北京科技大学  
张麦仓 北京科技大学  
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