1.Southwestern Institute of Physics;2.Shanxi University
The Spherical and densified of tungsten-based (W-Ni-Fe) alloy powder is of great significance to the improvement of physical properties such as the strength of powder-formed components for additive manufacturing. The effects of spray granulation and radio frequency (RF) thermal plasma treatment on the morphology and porosity of W-Ni-Fe alloy powder were studied by the spray granulation and radio frequency thermal plasma densification and spheroidization with high temperature. The research shows that the 96W-2.5Ni-1.5Fe ternary alloy powder formed by spray granulation has a loose microstructure, many internal voids and a rough surface. The comprehensive properties of the spray granulated powder can be significantly improved after the radio frequency thermal plasma treatment. The holes and looseness on the surface of spherical powder are alleviated, but there are also some micropores on the surface and internal with a few particles. The Ni and Fe phases between the W grains of the densified and spheroidized particles contain a relatively high content of W element.
陈伦江,陈文波,但敏,贺岩斌,聂军伟,朱海龙,童洪辉,金凡亚.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[J].稀有金属材料与工程,2023,52(10):3563~3570.[Chen Lunjiang, Chen Wenbo, Dan Min, He Yanbin, Nie Junwei, Zhu Hailong, Tong Honghui, Jin Fanya. Research on the Spray Granulation Pre-Alloyed W-Ni-Fe Ternary Powder and Densification and Spheroidization by RF Thermal plasmas[J]. Rare Metal Materials and Engineering,2023,52(10):3563~3570.]