磁场作用下镍基高温合金定向凝固的研究进展  

Recent Progress on Directional Solidification of Nickel-Based Superalloys with Magnetic Field

作　　者：赵勇 苏海军[1] 张军[1] 刘林[1] 傅恒志[1] ZHAO Yong;SU Haijun;ZHANG Jun;LIU Lin;FU Hengzhi(State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an 710072,China)

机构地区：[1]西北工业大学,凝固技术国家重点实验室,西安710072

出　　处：《机械工程材料》2021年第5期1-7,44,共8页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51690163,51331005)。

摘　　要：磁场控制定向凝固为制备高质量合金及铸件提供了新的途径,对提高产品冶金质量、发展新的制备工艺具有重要意义。概述了近年来磁场作用下镍基高温合金定向凝固的主要研究进展,介绍了磁场与金属导电熔体间的几种典型效应,系统总结了静磁场、交变磁场、脉冲磁场和行波磁场作用下镍基高温合金定向凝固组织的演变规律,磁场对杂晶等典型凝固缺陷的影响以及磁场对高温合金蠕变性能的影响,探讨了不同类型磁场作用下凝固组织和缺陷的形成机制。最后,对高温合金磁场定向凝固技术的发展趋势和突破点进行了展望。Magnetic field-controlled directional solidification provides a new route to prepare high-quality alloys and castings,and is of great significance for improving the metallurgical quality of products and developing new preparation techniques.The main research progress on the directional solidification of nickel-based superalloys under magnetic field in recent years is summarized.Several typical effects between magnetic field and metal conductive melt are described.The revolution of the directional solidification structures of nickel-based superalloys under static magnetic field,alternating magnetic field,pulsed magnetic field and traveling magnetic field,and the influence of magnetic field on typical solidification defects such as stray grains and on the creep properties of superalloys are systematically summarized.The formation mechanisms of solidification structures and defects under different types of magnetic fields are discussed.Finally,the development trend and breakthrough points of directional solidification of superalloys under magnetic field are prospected.

关 键 词：磁场 镍基高温合金 定向凝固 显微组织 蠕变性能 

分 类 号：TG146.1[一般工业技术—材料科学与工程]