• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2019, Vol. 55 ›› Issue (15): 10-16.doi: 10.3901/JME.2019.15.010

• 特邀专栏:增材制造技术 • 上一篇    下一篇

激光增材制造WNbMoTa高性能高熵合金

李青宇, 张航, 李涤尘, 王兴理想, 陈子豪, 黄胜   

  1. 西安交通大学机械制造系统工程国家重点实验室 西安 710049
  • 收稿日期:2018-11-09 修回日期:2019-01-16 出版日期:2019-08-05 发布日期:2019-08-05
  • 通讯作者: 张航(通信作者),男,1985年出生,博士,副教授。主要研究方向为高熔点合金激光增材制造、增材制造计算机数值模拟。E-mail:zhanghangmu@mail.xjtu.edu.cn
  • 作者简介:李青宇,男,1992年出生,博士研究生。主要研究方向为高熔点合金激光增材制造。Email:liqingyu9206@126.com
  • 基金资助:
    国家自然科学基金(51505366)和中国博士后科学基金(2015M570827)资助项目。

Manufacture of WNbMoTa High Performance High-entropy Alloy by Laser Additive Manufacturing

LI Qingyu, ZHANG Hang, LI Dichen, WANG Xinglixiang, CHEN Zihao, HUANG Sheng   

  1. State Key Laboratory for Manufacturing Systems Engineering, Xi'an Jiaotong University, Xi'an 710049
  • Received:2018-11-09 Revised:2019-01-16 Online:2019-08-05 Published:2019-08-05

摘要: 随着工业实践中高端装备耐温部件整体制造要求的提高,现有合金材料体系、制造工艺难以满足需求。研究将高熵合金材料与激光增材制造技术耦合,为我国大尺寸、复杂高端装备零部件的整体制造提供了新的解决方案。一方面,通过激光熔覆沉积技术成形了WNbMoTa、NbMoTa等多种高性能高熵合金,成形的高熵合金晶粒尺寸细小且无微观成分偏析。其中NbMoTa高熵合金1 000℃下屈服强度达到530 MPa,高于国内应用于航空发动机涡轮叶片的GH4169、DZ125高温合金和应用于航空航天工业的T111、C103、Nb-1Zr难熔合金。另一方面,通过基于有限差分-有限元数值模拟的方法对高熵合金材料成形过程中的热应力与应变进行数值模拟,解决了选区激光熔化成形高熵合金过程中样件易翘曲的问题。

关键词: 高端装备, 激光增材制造, 高熵合金

Abstract: With the universal improvement of the manufacturing requirements of temperature-resistant high-end equipment in industry,the existing alloy systems and traditional manufacturing processes have difficulties in meeting the current requirements. High-entropy alloys and laser additive manufacturing technology are coupled to provide a new solution for the overall manufacturing of large-size and complex high-end equipment parts in China. On the one hand, a variety of high-entropy alloys such as WNbMoTa and NbMoTa are formed by the laser cladding deposition. The grain size of the formed alloys is small and the constitutional segregation is not obvious. Among them, the yield strength of NbMoTa alloy under 1 000℃ reaches to 530 MPa, higher than GH4169, DZ125 high-temperature alloys used in domestic aero-engine turbine blades and T111, C103, Nb-1Zr refractory alloys used in domestic aerospace industry. On the other hand, the thermal stress and strain during high-entropy alloys forming are simulated based on FD-FE simulation, solving the problem that the samples are easy to warp in the process of selective laser melting.

Key words: high-end equipment, laser additive manufacturing, high-entropy alloy

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