激光熔覆共晶高熵合金涂层的制备及性能

doi:10.13251/j.issn.0254-6051.2026.02.049

金属热处理 ›› 2026, Vol. 51 ›› Issue (2): 326-333.DOI: 10.13251/j.issn.0254-6051.2026.02.049

激光熔覆共晶高熵合金涂层的制备及性能

刘泽宇, 马占山, 史海江, 余烁, 徐鑫, 龙海洋, 裴未迟, 周建辉, 薛全会

华北理工大学机械工程学院, 河北唐山 063210

收稿日期:2025-10-11 修回日期:2025-12-18 发布日期:2026-03-05
通讯作者: 马占山,讲师,博士,E-mail:mazhanshan@ncst.edu.cn
作者简介:刘泽宇(2000—),男,硕士研究生,主要研究方向为先进增材制造,E-mail:1103261981@qq.com。
基金资助:
GF重点学科实验室项目(GFXK-202506);河北省自然科学基金(E2024209149);唐山市科技计划(24130208C)

Preparation and properties of laser cladding eutectic high-entropy alloy coating

Liu Zeyu, Ma Zhanshan, Shi Haijiang, Yu Shuo, Xu Xin, Long Haiyang, Pei Weichi, Zhou Jianhui, Xue Quanhui

College of Mechanical Engineering, North China University of Science and Technology, Tangshan Hebei 063210, China

Received:2025-10-11 Revised:2025-12-18 Published:2026-03-05

摘要/Abstract

摘要： 为了获得成形质量好、综合性能优良的共晶高熵合金涂层,基于响应面法设计了不同工艺参数下激光熔覆共晶高熵合金涂层的试验,以激光功率、扫描速度、送粉率作为试验因素,稀释率、宽高比、显微硬度作为响应量,建立了涂层形貌的预测模型,分析各工艺参数对涂层质量的影响,优化得到一组最优工艺参数组合,并对优化结果进行了试验验证。结果表明:扫描速度与送粉速率对涂层宽高比的影响最为显著,送粉速率对稀释率的影响最大,激光功率、扫描速度、送粉速率对显微硬度的影响均较为显著。优化后的最优工艺参数为:激光功率1850 W,扫描速度9 mm/s,送粉率3.85 r/min。EBSD结果表明涂层的平均晶粒尺寸较小且无明显的择优取向,显微硬度测试表明涂层的平均显微硬度为340 HV0.2,相较于基体(220 HV0.2)提高了54.54%。

关键词: 激光熔覆, 共晶高熵合金, 工艺参数, 响应面法

Abstract: In order to obtain eutectic high-entropy alloy coatings with good forming quality and excellent comprehensive properties, experiments on laser cladding eutectic high-entropy alloy coatings under different process parameters were designed based on response surface methodology. A predictive model for coating morphology was established using laser power, scanning speed, and powder feeding rate as experimental factors, along with dilution rate, aspect ratio, and microhardness as response variables, which was used to analyze the effect of process parameters on coating quality and optimize the parameter combination. Experimental validation was conducted on the optimized results. The results show that scanning speed and powder feeding rate have the most significant impacts on the coating aspect ratio; powder feeding rate exerts the greatest effect on the dilution rate, and laser power, scanning speed and powder feeding rate all notably affect the microhardness. The optimized process parameters are determined as follows: laser power of 1850 W, scanning speed of 9 mm/s, and powder feed rate of 3.85 r/min. EBSD analysis indicates that the coating possesses fine average grain size without significant preferred orientation. Microhardness testing reveals an average hardness of 340 HV0.2 of the coating, representing a 54.54% improvement over the microhardness of the substrate(220 HV0.2).

Key words: laser cladding, eutectic high-entropy alloy, process parameters, response surface methodology

中图分类号:

TG142.1

刘泽宇, 马占山, 史海江, 余烁, 徐鑫, 龙海洋, 裴未迟, 周建辉, 薛全会. 激光熔覆共晶高熵合金涂层的制备及性能[J]. 金属热处理, 2026, 51(2): 326-333.

Liu Zeyu, Ma Zhanshan, Shi Haijiang, Yu Shuo, Xu Xin, Long Haiyang, Pei Weichi, Zhou Jianhui, Xue Quanhui. Preparation and properties of laser cladding eutectic high-entropy alloy coating[J]. Heat Treatment of Metals, 2026, 51(2): 326-333.

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激光熔覆共晶高熵合金涂层的制备及性能

Preparation and properties of laser cladding eutectic high-entropy alloy coating

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