钨基合金激光立体成形的组织及性能研究

王攀; 刘天伟; 王述钢; 蒋驰; 杨帆

doi:10.7510/jgjs.issn.1001-3806.2016.02.022

钨基合金激光立体成形的组织及性能研究

1.
中国工程物理研究院表面物理与化学重点实验室, 绵阳 621907;
2.
中国工程物理研究院材料研究所, 绵阳 621907

作者简介: 王攀(1990-),男,硕士研究生,主要从事合金激光立体成形方面的研究。.

通讯作者: 刘天伟, liutianwei@caep.cn ;

基金项目:
中国工程物理研究院重点实验室学科发展基金资助项目(xk201308)
中图分类号: TN204

Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

1.
Science and Technology on Surface Physics and Chemistry Laboratory, Chinese Academy of Engineering Physics, Mianyang 621907, China;
2.
Institute of Material, Chinese Academy of Engineering Physics, Mianyang 621907, China

Corresponding author: LIU Tianwei, liutianwei@caep.cn ;

CLC number: TN204

摘要: 为了制备高性能、大尺寸钨合金零件,利用激光立体成形技术进行了前期探究实验,在大气环境下制备多种配比的W-Ni-Fe高比重合金力学拉伸试验件,通过测试抗拉强度、硬度,结合组织结构和成分配比的探究分析,发现其成形性及力学性能与传统的粉末冶金烧结工艺之间还存在着一定的差距。抗拉强度在W原子数分数为0.6时达到最大值717.5MPa,之后随着W原子数分数的增大反而明显减小,当W原子数分数在0.8以上时,强度已低于400MPa。样品存在孔洞和氧化现象,大量W未溶化,Ni和Fe元素越多,微观组织均匀性越好、成分偏析越小。结果表明,利用激光立体成形技术可对钨基合金堆积成形,但是实验工艺参量和实验环境仍需进一步改进。此研究可获得免受大气气氛影响和工艺参量限制的试样,为获得性能更好的高比重钨合金激光立体成形件提供了帮助。
- 激光技术 /
- 激光立体成形 /
- W-Ni-Fe高比重合金 /
- 性能检测 /
- 组织分析
Abstract: In order to prepare high-performance and large-size tungsten alloy parts, the preliminary experiments were carried out by using the laser solid forming technique. Various proportions of W-Ni-Fe high-density alloy mechanical tensile test pieces were prepared under atmospheric conditions. By testing tensile strength and hardness, by analyzing the structure and the compents proportions, the differences between the traditional powder metallurgy sintering process and formability and mechanical properties were found. The results show that the maximum tensile strength reaches 717.5MPa under 0.6 of W atomicity fraction and it decreases significantly with the increase of W atomicity fraction. When atomicity fraction of W atom is more than 0.8, the strength is lower than 400MPa. Holes and oxidation phenomenon exist in the samples. A large number of W doesn't melt. The more Ni, Fe elements, the better microstructure uniformity, the smaller composition segregation. The results preesent that tungsten alloy can be formed by laser solid forming technique but experiment process parameters and experimental environment remain to be further improved. Samples can be obtained free from effect of atmosphere and process parameters limits based on this study. Furthemore, the study is helpful to obtain better performance of tungsten alloy laser solid forming parts.
- laser technique /
- laser solid forming /
- W-Ni-Fe high-proportion alloy /
- performance test /
- micostructure analysis

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钨基合金激光立体成形的组织及性能研究

作者简介: 王攀(1990-),男,硕士研究生,主要从事合金激光立体成形方面的研究。.

通讯作者: 刘天伟, liutianwei@caep.cn ;

Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

Corresponding author: LIU Tianwei, liutianwei@caep.cn ;

计量

钨基合金激光立体成形的组织及性能研究

通讯作者: 刘天伟, liutianwei@caep.cn;

作者简介: 王攀(1990-),男,硕士研究生,主要从事合金激光立体成形方面的研究。

English Abstract

Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

Corresponding author: LIU Tianwei, liutianwei@caep.cn

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留言板

钨基合金激光立体成形的组织及性能研究

作者简介: 王攀(1990-),男,硕士研究生,主要从事合金激光立体成形方面的研究。.

通讯作者: 刘天伟, liutianwei@caep.cn ;

Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

Corresponding author: LIU Tianwei, liutianwei@caep.cn ;

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出版历程

钨基合金激光立体成形的组织及性能研究

通讯作者: 刘天伟, liutianwei@caep.cn;

作者简介: 王攀(1990-),男,硕士研究生,主要从事合金激光立体成形方面的研究。

English Abstract

Research of microstructure and properties of tungsten based alloy fabricated by laser solid forming

Corresponding author: LIU Tianwei, liutianwei@caep.cn

全文HTML

目录