【摘要】 利用双层辉光等离子表面冶金技术在NCF3015气门合金钢上制备TiN涂层，通过SEM、EDS、XRD、显微硬度计和高温摩擦磨损试验机研究涂层的微观结构形貌、硬度和高温耐磨性。结果表明：TiN涂层以岛状方式均匀生长，表面结构致密；涂层表面平均硬度可达1265.2 HV0.05;在5 N与10 N载荷下，涂层的比磨损率较气门基体分别降低79.3%、79.7%,是高温苛刻条件下气门表面防护的理想材料，可显著提高气门在发动机中的服役寿命。更多还原

【Abstract】 TiN coatings were prepared on NCF3015 valve alloy steel using double-layer glow plasma surface metallurgy technology. The microstructure, hardness and high-temperature wear resistance of the coatings were studied by SEM, EDS, XRD, microhardness tester and high-temperature friction and wear tester. The results show that the TiN coating grows uniformly in an island-like manner and has a dense surface structure. The average surface hardness of the coating can reach 1265.2 HV0.05. Under 5 N and 10 N loads, the specific wear rate of the coating is reduced by 79.3% and 79.7% compared to the valve substrate, respectively. It is an ideal material for valve surface protection under high temperature and harsh conditions, and can significantly improve the service life of valves in engines.更多还原