粉末高温合金研究进展

Development in Powder Metallurgy Superalloy

粉末高温合金是制造高性能航空发动机涡轮盘等转动部件的关键材料口针对国外粉末高温合金的研究历史和现状,结合粉末高温合金的制备工艺流程,重点介绍了美国和俄罗斯粉末高温合金的发展现状,对比分析了不同粉末制备工艺、粉末固结工艺、盘件成形工艺的特点,总结了粉末高温合金中存在缺陷的原因及控制方法。针对我国粉末高温合金的研究历史和现状,总结了国内粉末高温领域所取得的进展。对国内外粉末高温合金在航空发动机上的应用进行了总结。对超纯净度细粉制备、直接热等静压近终成形、双性能粉末涡轮盘制备工艺等高性能粉末高温合金的关键技术及发展方向进行了展望。针对国内对粉末高温合金的需求现状,指出了国内粉末高温合金研制和生产过程中存在的问题并给出了相应的解决思路。

PM superalloy is key structural materials applied for turbine disc of high thrust-weight ratio aeroengine. PM superalloy development in America and Russia is mainly summarized. According to manufacturing process of PM superalloy, different process routes including powder atomization, powder consolidation and disc forming are compared, defects and corresponding controlling methods in PM superalloy are analyzed. The domestic development of PM superalloy is also summarized. PM superalloy applied for aeroengine is summarized. According to developing trend of PM superalloy, the key technologies such as ultra fine and clean powder atomization, near net shape forming by HIP, dual microstructure heat treatment ( DHMT) are prospected in developing high-performance PM superalloy. According to current development condition of PM superalloy in china, existed problems and corresponding developing direction are pointed out.