Enhancing comprehensive properties of HVOF thermally sprayed WC-10Co coatings using two grain inhibitors
发布时间：2024-02-10
点击次数：
影响因子：5.4
DOI码：10.1016/j.surfcoat.2023.130323
所属单位：中南大学粉末冶金研究院
教研室：高温结构材料研究所
发表刊物：Surfacce & Coating Technology
项目来源：国家科技重大项目（J2019-IV-0003-0070），加强基本计划技术领域的基金（2021-JCJQ-JJ-1103），CAST的年轻精英科学家赞助计划（2022QNRC001），中国国家自然科学基金（NSFC）（91860105）
关键字：High-velocity oxygen fuel (HVOF) thermal, Spraying, WC-10Co cemented coating, Microstructure, Wear resistance, Corrosion resistance
摘要：The industry widely uses WC coatings to protect vital machine parts, including industrial gas turbines, ball valves, and aircraft landing gear shafts. To enhance the comprehensive performance of WC-10Co cemented carbide coatings, this study added VC and Cr3C2 grain inhibitors to refine the WC particles. Two novel powder compositions, S1 (WC-10Co-2Cr(3)C(2)-2VC) and S2 (WC-10Co-2VC-2Cr) were developed using the spray granulation method, alongside a commercial WC-10Co-4Cr powder as a control. These coatings were applied to 316 stainless steel substrates using the HVOF technique and subjected to XRD, SEM, hardness, friction, and electrochemical analysis. The microstructures, phase compositions, and various properties of WC-10Co-2Cr(3)C(2)-2VC and WC-10Co-2VC-2Cr coatings were systematically investigated. The results indicate a significant reduction in decarburization and porosity in S1 and S2 coatings compared to the commercial WC-10Co-4Cr coatings. VC and Cr3C2 suppressed the Ostwald ripening phenomenon, leading to smaller WC particle sizes in S1 and S2 coatings. In terms of performance, WC-10Co-2Cr(3)C(2)-2VC exhibited the highest hardness and superior wear resistance, while the WC-10Co-2VC-2Cr coating displayed the lowest corrosion rate in a 5 wt% H2SO4 solution at 25 degrees C, all while maintaining excellent mechanical properties. This study opens potential directions for the creation of high-performance WC-based coatings.
合写作者：Feng Liu, Xuepeng Wang, Haibo Liu, Tao He, Wanxiang Dai, Yong Liu
第一作者：Jian Yao
论文类型：Article
通讯作者：谭黎明, Lan Huang
论文编号：130323
学科门类：工学
一级学科：冶金
卷号：477
ISSN号：0257-8972
是否译文：否
发表时间：2024-02-10