杨广宇,陈靖海,刘楠,杨坤,贾亮

• 1:西北有色金属研究院金属多孔材料国家重点实验室
• 2:东北大学材料科学与工程学院

摘要(Abstract)：

采用粉床型电子束增材制造技术制备了90W-7Ni-3Fe高比重钨基合金,研究了不同的线能量密度对合金的显微组织及致密化过程的影响。结果表明:电子束增材制造成形的90W-7Ni-3Fe合金的组织由W颗粒和Ni-Fe固溶体粘结相组成,粘结相内溶解了一定量的W,随着线能量密度的增大,粘结相的含量及其内部W的含量增大;在不同的线能量密度下合金的致密化过程略有不同:在低的线能量密度下(0. 24 J/mm),合金的致密化过程主要是钨颗粒的粘结,随着线能量密度的升高(0. 3～0. 75 J/mm),出现了W颗粒的重排和W在Ni-Fe固溶体里的溶解-析出,随着能量密度继续增大(1. 0 J/mm),出现了一定量的钨颗粒的熔化和低熔点元素Ni、Fe的挥发,且随着钨在粘结相中的含量升高,合金的固溶强化作用增强,显微硬度相应提高。

关键词(KeyWords)： 金属增材制造;钨基合金;90W-7Ni-3Fe合金;粉床型电子束增材制造技术

Abstract:

Keywords:

基金项目(Foundation): 科学挑战专题项目(TZ2018006-0302-01)

作者(Author): 杨广宇,陈靖海,刘楠,杨坤,贾亮

DOI: 10.13289/j.issn.1009-6264.2019-0159

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