HVOF喷涂WC-10Co-4Cr涂层工艺优化及性能研究

IF 4.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Refractory Metals & Hard Materials Pub Date : 2025-09-04 DOI:10.1016/j.ijrmhm.2025.107420

Xinglong Fu, Xiumin Chen, Yong Deng

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引用次数: 0

摘要

采用高速氧燃料（HVOF）喷涂技术在7075铝合金表面制备WC-10Co-4Cr涂层，研究丙烷流量、氧流量和喷涂距离对涂层孔隙率、硬度和耐磨性的影响。当丙烷流量为7 m3·h−1，氧气流量为8 m3·h−1，喷涂距离为200 mm时，涂层的硬度为802.79 HV，磨损率仅为1.24 × 10−6 mm3N−1 m−1。涂层的主要磨损机制是疲劳磨损。扫描电镜（SEM）、能谱分析（EDS）和热力学分析表明，高温喷涂过程中WC颗粒部分脱碳形成W2C。在界面处，Al与游离碳和Co反应生成Al4C3和AlCo。

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Process optimization and performance study of WC-10Co-4Cr coatings prepared by HVOF spraying

This study used high-velocity oxygen fuel (HVOF) spraying to prepare WC-10Co-4Cr coatings on the surface of 7075 aluminum alloy and investigated the effects of the propane flow rate, oxygen flow rate, and spraying distance on the coating's porosity, hardness, and wear resistance. The coating exhibited optimal performance of a hardness of 802.79 HV and a wear rate of only 1.24 × 10⁻⁶ mm³N⁻¹ m⁻¹ when the propane flow rate was 7 m³·h⁻¹, the oxygen flow rate was 8 m³·h⁻¹, and the spraying distance was 200 mm. The main wear mechanism of the coating was fatigue wear. Scanning electron microscopy (SEM), energy-dispersive spectrometry (EDS), and thermodynamic analysis showed that WC particles were partially decarbonized to form W₂C during high-temperature spraying. At the interface, Al reacted with free carbon and Co to form Al₄C₃ and AlCo.

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来源期刊

$International Journal of Refractory Metals & Hard Materials$

International Journal of Refractory Metals & Hard Materials 工程技术-材料科学：综合

CiteScore

7.00

自引率

13.90%

发文量

236

审稿时长

35 days

期刊介绍： The International Journal of Refractory Metals and Hard Materials (IJRMHM) publishes original research articles concerned with all aspects of refractory metals and hard materials. Refractory metals are defined as metals with melting points higher than 1800 °C. These are tungsten, molybdenum, chromium, tantalum, niobium, hafnium, and rhenium, as well as many compounds and alloys based thereupon. Hard materials that are included in the scope of this journal are defined as materials with hardness values higher than 1000 kg/mm2, primarily intended for applications as manufacturing tools or wear resistant components in mechanical systems. Thus they encompass carbides, nitrides and borides of metals, and related compounds. A special focus of this journal is put on the family of hardmetals, which is also known as cemented tungsten carbide, and cermets which are based on titanium carbide and carbonitrides with or without a metal binder. Ceramics and superhard materials including diamond and cubic boron nitride may also be accepted provided the subject material is presented as hard materials as defined above.