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噴霧造粒預合金化W-Ni-Fe三元合金粉末及射頻熱等離子體致密球化研究
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1.核工業(yè)西南物理研究院;2.南華大學;3.山西大學

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基金項目:

國家自然科學基金(11805058,11875039,52173041),四川省科技計劃資助(2019YFG0444)


Research on the Spray Granulation Pre-Alloyed W-Ni-Fe Ternary Powder and Densification and Spheroidization by RF Thermal plasmas
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1.Southwestern Institute of Physics;2.Shanxi University

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    摘要:

    球形致密化的鎢基（W-Ni-Fe）合金粉末對增材制造等粉末成形構(gòu)件的強度等物理性能的提升具有重要意義。采用噴霧造粒和射頻熱等離子體高溫致密球化處理的方式研究了W-Ni-Fe粉末經(jīng)噴霧造粒后射頻熱等離子體處理對其合金粉末的形貌、孔隙等的作用效果。研究表明，經(jīng)噴霧造粒后所形成的96W-2.5Ni-1.5Fe三元合金粉末顯微組織結(jié)構(gòu)疏松，內(nèi)部中空洞較多且表面粗糙；射頻熱等離子體對噴霧造粒粉進行處理后其綜合性能提高，球形粉表面孔洞及疏松現(xiàn)象有所緩解，但仍有部分顆粒表面與內(nèi)部存在微孔，且致密球化后的W晶粒之間Ni、Fe相含有較高含量的W元素。

    Abstract:

    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.

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陳倫江,陳文波,但敏,賀巖斌,聶軍偉,朱海龍,童洪輝,金凡亞.噴霧造粒預合金化W-Ni-Fe三元合金粉末及射頻熱等離子體致密球化研究[J].稀有金屬材料與工程,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.]
DOI：10.12442/j. issn.1002-185X.20220785

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  • 收稿日期:2022-10-08
  • 最后修改日期:2023-09-21
  • 錄用日期:2022-11-09
  • 在線發(fā)布日期: 2023-10-27
  • 出版日期: 2023-10-24