高温下激光熔覆制备的 ZrO2 增强人造卫星 6 基体涂层的磨损性能

IF 5.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Wear Pub Date : 2024-08-10 DOI:10.1016/j.wear.2024.205539
Gongjun Cui , Haotian Cui , Wuchen Zhang , Xiaoqing Yan , Junxia Li , Ziming Kou
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引用次数: 0

摘要

为了改变Stellite 6超合金作为耐磨涂层在室温-1000 °C条件下的耐磨性,采用激光熔覆技术在Inconel 718镍合金基体上制作了不同含量(1.0、2.5和4.0 wt%)的ZrO2增强Stellite 6基体涂层。对含有 ZrO2 的 Stellite 6 基体涂层的微观结构、硬度和高温磨损行为进行了系统研究。在室温-1000 °C条件下,使用盘上球摩擦磨损测试仪对Si3N4进行了滑动磨损测试。结果表明,ZrO2 具有明显的细晶粒强化和分散强化效果。ZrO2 增强涂层的硬度为 470-540 Hv。ZrO2 含量对 Stellite 6 基体涂层的磨损性能存在临界值。ZrO2 含量为 2.5 wt% 的涂层具有理想的耐磨性,磨损率约为 10-5 mm3/N.m,这归因于高微硬度、固体润滑剂的形成以及滑动表面摩擦膜的形成。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Wear performance of ZrO2 reinforced stellite 6 matrix coatings prepared by laser cladding at elevated temperature

In order to modify the wear resistance of Stellite 6 superalloy as wear resistant coating at room temperature-1000 °C, the different contents (1.0, 2.5 and 4.0 wt%) of ZrO2 reinforced Stellite 6 matrix coatings were fabricated over the Inconel 718 nickel alloy substrate by laser cladding technology. The microstructure, hardness and high-temperature wear behavior of Stellite 6 matrix coatings with ZrO2 was systematically studied. The sliding wear test were done using a ball-on-disk tribometer against Si3N4 at room temperature-1000 °C. The results showed that the ZrO2 showed obvious fine-grain strengthening and dispersion strengthening effect. The hardness of coatings reinforced by ZrO2 were 470–540 Hv. A critical valve of ZrO2 content was existed for the wear performance of Stellite 6 matrix coatings. The coating with 2.5 wt% ZrO2 had the desirable wear resistance, and the wear rate was in the order of 10−5 mm3/N.m. This was attributed to the high microhardness and the formation of solid lubricants, as well as the friction film on the sliding surfaces.

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来源期刊
Wear
Wear 工程技术-材料科学:综合
CiteScore
8.80
自引率
8.00%
发文量
280
审稿时长
47 days
期刊介绍: Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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