喷雾造粒预合金化W-Ni-Fe三元合金粉末及射频热等离子体致密球化研究  

Research on the Spray Granulation Pre-alloyed W-Ni-Fe Ternary Alloy Powder and Densification and Spheroidization by RF Thermal Plasmas

作　　者：陈伦江[1] 陈文波[2] 但敏[1] 贺岩斌 聂军伟 朱海龙[3] 童洪辉[1] 金凡亚[1] Chen Lunjiang;Chen Wenbo;Dan Min;He Yanbin;Nie Junwei;Zhu Hailong;Tong Honghui;Jin Fanya(Southwestern Institute of Physics,Chengdu 610041,China;University of South China,Hengyang 421001,China;Shanxi University,Taiyuan 030006,China)

机构地区：[1]核工业西南物理研究院,四川成都610041 [2]南华大学,湖南衡阳421001 [3]山西大学,山西太原030006

出　　处：《稀有金属材料与工程》2023年第10期3563-3570,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(11805058,11875039,52173041);四川省科技计划(2019YFG0444)。

摘　　要：球形致密化的钨基合金粉末对增材制造等粉末成形构件的强度等性能的提升具有重要意义。采用喷雾造粒结合射频热等离子体高温致密球化处理的方式研究了W-Ni-Fe粉末经喷雾造粒后射频热等离子体处理对其合金粉末的形貌、孔隙等的作用效果。研究表明,经喷雾造粒后所形成的96W-2.5Ni-1.5Fe三元合金粉末显微组织结构疏松,内部中空洞较多且表面粗糙;射频热等离子体对喷雾造粒粉进行处理后其综合性能提高,球形粉表面孔洞及疏松现象有所缓解,但仍有部分颗粒表面与内部存在微孔,且致密球化后的W晶粒之间Ni、Fe相含有较高含量的W元素。The spheroidization and densification of tungsten-based alloy powder is of great significance to the component properties improvement,such as the strength of powder-fabricated components by additive manufacturing.The effect of radio frequency(RF)thermal plasma treatment on the morphology and porosity of spray granulated pre-alloyed W-Ni-Fe alloy powder were studied.The results show that the 96W-2.5Ni-1.5Fe ternary alloy powder formed by spray granulation has a loose microstructure,part of the powders have internal voids and a rough surface.The comprehensive properties of the spray granulated powder can be significantly improved after RF thermal plasma treatment.The holes and looseness on the surface of spherical powder are alleviated,but a few particles also have some micropores on the surface and in the internal.The Ni and Fe phases between the W grains of the densified and spheroidized particles contain a relatively high content of W element.

关 键 词：喷雾造粒 射频热等离子体 W-NI-FE合金 预合金化 致密球形粉 

分 类 号：TF123[冶金工程—粉末冶金] TG146.411[冶金工程—冶金物理化学]