金属热处理 ›› 2021, Vol. 46 ›› Issue (11): 241-244.DOI: 10.13251/j.issn.0254-6051.2021.11.043

• 表面工程 • 上一篇    下一篇

H13钢表面激光熔覆AlCoCrFeNiWx高熵合金涂层及其性能

吴韬1,2, 吴濛婷1, 陈云祥1, 华钱峰1, 石淑琴1, 李纪恒2, 毛鹏展3,4, 陈小明3,4   

  1. 1.浙江机电职业技术学院, 浙江 杭州 310053;
    2.北京科技大学 新金属材料国家重点实验室, 北京 100083;
    3.浙江省水利水电装备表面工程技术研究重点实验室, 浙江 杭州 310012;
    4.水利部 杭州机械设计研究所, 浙江 杭州 310012
  • 收稿日期:2021-05-27 出版日期:2021-11-25 发布日期:2021-12-08
  • 通讯作者: 陈小明,高级工程师,E-mail:xiaoming840@163.com
  • 作者简介:吴 韬(1989—),男,讲师,博士研究生,主要研究方向为高性能金属材料增材制造,E-mail:627322800@qq.com
  • 基金资助:
    浙江省基础公益基金(LGG21E010005);新金属材料国家重点实验室开放基金(2020-Z07);浙江省水利水电装备表面工程技术研究重点实验室开放基金(2021SLKL011);浙江机电职业技术学院科教融合重点项目(A-0271-20-204)

Properties of laser clad AlCoCrFeNiWx high entropy alloy coatings on H13 steel

Wu Tao1,2, Wu Mengting1, Chen Yunxiang1, Hua Qianfeng1, Shi Shuqin1, Li Jiheng2, Mao Pengzhan3,4, Chen Xiaoming3,4   

  1. 1. Zhejiang Institute of Mechanical and Electrical Engineering , Hangzhou Zhejiang 310053, China;
    2. State Key Laboratory of Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;
    3. Key Laboratory of Research on Hydraulic and Hydro-power Equipment Surface Engineer Technology of Zhejiang Province, Hangzhou Zhejiang 310012, China;
    4. Hangzhou Mechanical Design Research Institute, Ministry of Water Resource, Hangzhou Zhejiang 310012, China
  • Received:2021-05-27 Online:2021-11-25 Published:2021-12-08

摘要: 以热作模具钢H13作为基体,通过激光熔覆制备AlCoCrFeNiWx(x=0, 0.5)高熵合金涂层,并研究W元素的添加对其组织结构以及热稳定性和耐磨性的影响。激光熔覆AlCoCrFeNiWx高熵合金涂层相组织结构随W元素的添加会发生变化,W的添加会促进BCC相的形成,并且在晶界处形成富含W的第二相,其生长方向会沿着冷却方向形成细长状的枝晶,这些第二相会起到耐磨和强化涂层的作用。经800 ℃长时间保温后测试AlCoCrFeNiWx高熵合金涂层的热稳定性。结果表明,AlCoCrFeNiWx高熵合金涂层均能够保持较高的硬度和耐磨性,14 h保温后的硬度仍大于400 HV0.2,加入W元素后的涂层抗回火软化能力更强,800 ℃保温14 h后的耐摩擦磨损性能是基体的两倍以上。

关键词: H13钢, 高熵合金涂层, 激光熔覆

Abstract: Hot working die steel H13 was used as the matrix, and AlCoCrFeNiWx (x=0, 0.5) high-entropy alloy coatings were prepared by laser cladding, and the influence of W element addition on its structure, thermal stability and wear resistance was researched. The phase structure of the laser clad AlCoCrFeNiWx high-entropy alloy coatings changes with the addition of W element. The addition of W element will promote the formation of the BCC phase, and the second phase rich in W forms at the grain boundary. The growth direction forms elongated dendrites along the cooling direction, and these second phases play a role of wear-resistant and reinforcing the coatings. The tempering stability of the high-entropy alloy coatings was studied after long-term heat preservation at 800 ℃. The results show that the AlCoCrFeNiWx high-entropy alloy coatings can maintain high hardness and wear resistance, and the hardness after 14 h heat preservation is still above 400 HV0.2, the coating added with W element has stronger resistance to tempering and softening, and the friction and wear resistance is more than twice that of the substrate after heat preservation at 800 ℃ for 14 h.

Key words: H13 steel, high-entropy alloy coatings(HEACs), laser cladding

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