Y2O3添加量对超高速激光熔覆IN718合金涂层组织和耐磨性能的影响

doi:10.13251/j.issn.0254-6051.2024.07.027

摘要/Abstract

摘要： 采用超高速激光熔覆技术制备了添加Y₂O₃的IN718合金复合涂层,分析了不同Y₂O₃添加量对涂层组织形貌、相组成、硬度和耐磨性能的影响。结果表明,Y₂O₃的添加降低或消除了涂层内部的孔洞缺陷,形成了致密且细化的晶粒组织。当Y₂O₃添加量为1.0%时,涂层的硬度最高,平均硬度为380.2 HV0.1,同时还具有较优的耐磨性能,其摩擦因数和磨损量分别为0.66和5.03×10^-4 mm³/(N·m),磨损机制为磨粒磨损、粘着磨损和氧化磨损。涂层中弥散分布的Y₂O₃形成新的形核点,从而细化组织晶粒,使涂层硬度和耐磨性能得到了提升。

关键词: 超高速激光熔覆, IN718合金, Y₂O₃含量, 组织形貌, 耐磨性能

Abstract: IN718 alloy composite coatings with Y₂O₃ addition were prepared by ultra-high-speed laser-cladding technology. The effect of Y₂O₃ addition on coating microstructure and morphology, phase composition, hardness and wear resistance was analyzed. The results show that the addition of Y₂O₃ reduces the pore defects in the coating and forms a dense and refined grain. The hardness of the coatings is the highest when Y₂O₃ content is 1.0% which average value is 380.2 HV0.1, meanwhile, it has superior wear resistance with the friction coefficient of 0.66 and the wear rate of 5.03×10^-4 mm³/(N·m), and the wear mechanism is combined of abrasive wear, adhesive wear and oxidative wear. The dispersed Y₂O₃ in the coatings forms nucleation point, resulting in the refinement of grains and improvement of hardness and wear resistance.

Key words: ultra-high-speed laser cladding, IN718 alloy, Y₂O₃ content, microstructure and morphology, wear resistance

中图分类号:

TG174

李蕊. Y₂O₃添加量对超高速激光熔覆IN718合金涂层组织和耐磨性能的影响[J]. 金属热处理, 2024, 49(7): 173-180.

Li Rui. Influence of Y₂O₃ addition on microstructure and wear resistance of ultra-high-speed laser-clad IN718 alloy coatings[J]. Heat Treatment of Metals, 2024, 49(7): 173-180.

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Y₂O₃添加量对超高速激光熔覆IN718合金涂层组织和耐磨性能的影响

Influence of Y₂O₃ addition on microstructure and wear resistance of ultra-high-speed laser-clad IN718 alloy coatings

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