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激光熔覆Al2CoCrCuFeNixTi高熵合金涂层的组织及性能

Microstructure and Property of Al2CrFeCoCuNixTi High Entropy Alloy Coatings Prepared by Laser Cladding

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摘要

采用激光熔覆工艺在Q235钢表面制备了Al2CrFeCoCuNixTi高熵合金涂层, 分析了Al2CrFeCoCuNixTi高熵合金微观结构, 测试了涂层的力学性能及耐蚀性能。结果表明, Al2CrFeCoCuNixTi高熵合金涂层熔覆区组织主要由等轴晶组成, 且等轴晶上分布着析出物; 涂层相结构主要由面心立方、体心立方结构及Laves相组成。随着Ni含量的增加, 涂层的相对耐磨性呈先增加后降低的趋势, 其值为2.0~3.6, 耐磨性受涂层塑性与硬度的共同影响, 涂层在0.5 mol/L H2SO4溶液中表现出优异的耐蚀性, 耐蚀性的差异主要取决于涂层的结构组成。

Abstract

The Al2CrFeCoCuNixTi high entropy alloy coating on Q235 steel surface is prepared by laser cladding. Its microstructure is analyzed, and its mechanical property and corrosion resistance are tested. The results show that the microstructure of cladding zone in the Al2CrFeCoCuNixTi high entropy alloy coating is mainly composed of equiaxed grains with distribution of precipitates. The phase structure of this coating is mainly composed of face-centered-cubic structure, body-centered-cubic structure and Laves phase. With the increase of Ni content, the relative wear resistance of this coating increases first and then decreases with a value of 2.0-3.6. The wear resistance of this coating is affected by both plasticity and hardness. The coatings have excellent corrosion resistance in the 0.5 mol/L H2SO4 solution, and the difference of corrosion resistance mainly depends on the structural components of coatings.

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中图分类号:TG135

DOI:10.3788/lop54.051404

所属栏目:激光器与激光光学

基金项目:四川省教育厅科学研究项目(16ZB0512)

收稿日期:2016-12-23

修改稿日期:2017-01-10

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作者单位    点击查看

邱星武:四川建筑职业技术学院材料工程系, 四川 德阳 618000
刘春阁:四川建筑职业技术学院测绘工程系, 四川 德阳 618000
张云鹏:西安理工大学材料科学与工程学院, 陕西 西安 710048

联系人作者:邱星武(fallenrain922@163.com)

备注:邱星武(1982-), 男, 博士, 副教授, 主要从事新材料及材料表面激光改性方面的研究。

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引用该论文

Qiu Xingwu,Liu Chunge,Zhang Yunpeng. Microstructure and Property of Al2CrFeCoCuNixTi High Entropy Alloy Coatings Prepared by Laser Cladding[J]. Laser & Optoelectronics Progress, 2017, 54(5): 051404

邱星武,刘春阁,张云鹏. 激光熔覆Al2CoCrCuFeNixTi高熵合金涂层的组织及性能[J]. 激光与光电子学进展, 2017, 54(5): 051404

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