H13钢表面激光熔覆AlCoCrFeNiWx高熵合金涂层及其性能

doi:10.13251/j.issn.0254-6051.2021.11.043

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

H13钢表面激光熔覆AlCoCrFeNiW_x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.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 AlCoCrFeNiW_x high entropy alloy coatings on H13 steel

Wu Tao^1,2, Wu Mengting¹, Chen Yunxiang¹, Hua Qianfeng¹, Shi Shuqin¹, Li Jiheng², Mao Pengzhan^3,4, Chen Xiaoming^3,4

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/Abstract

摘要： 以热作模具钢H13作为基体,通过激光熔覆制备AlCoCrFeNiW_x(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AlCoCrFeNiW_x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AlCoCrFeNiW_x高熵合金涂层的热稳定性。结果表明,AlCoCrFeNiW_x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 AlCoCrFeNiW_x (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 AlCoCrFeNiW_x 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 AlCoCrFeNiW_x 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

中图分类号:

TG139

吴韬, 吴濛婷, 陈云祥, 华钱峰, 石淑琴, 李纪恒, 毛鹏展, 陈小明. H13钢表面激光熔覆AlCoCrFeNiW_x高熵合金涂层及其性能[J]. 金属热处理, 2021, 46(11): 241-244.

Wu Tao, Wu Mengting, Chen Yunxiang, Hua Qianfeng, Shi Shuqin, Li Jiheng, Mao Pengzhan, Chen Xiaoming. Properties of laser clad AlCoCrFeNiW_x high entropy alloy coatings on H13 steel[J]. Heat Treatment of Metals, 2021, 46(11): 241-244.

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H13钢表面激光熔覆AlCoCrFeNiW_x高熵合金涂层及其性能

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

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H13钢表面激光熔覆AlCoCrFeNiWx高熵合金涂层及其性能

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

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H13钢表面激光熔覆AlCoCrFeNiW_x高熵合金涂层及其性能

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