摘要
采用激光熔覆技术在Q235钢表面制备TiC-VC-Mo2C颗粒增强Fe基复合涂层。借助X射线衍射仪、扫描电镜、显微硬度计、滑动磨损试验机,研究了复合涂层的显微组织和性能。研究表明:复合涂层物相包括α-Fe、γ-Fe、Fe3C和TiC-VC-Mo2C,其中陶瓷相以细小粒状均匀分布于涂层,起到了颗粒增强的作用。复合涂层的平均显微硬度达1102.5HV0.3,具有优异的耐磨性,在相同试验条件下,复合涂层的磨损失重仅约为基材的1/20,其磨损机制主要为显微切削和区域性粘着磨损。
Microstructure and properties of Fe-Ti-V-Mo-C composite coating produced on Q235 steel by laser cladding were investigated byuse of XRD, SEM, micro-hardness and sliding wear tester. Results showed that the phase structure of composite coating was consisted of α-Fe, γ-Fe, Fe3C, TiC-VC-Mo2C. The generation of ceramic particles, with equal distribution in the coating, played a crucial role in particle reinforcement. Average micro-hardness of composite coating arrived at 1102.5HV0.3, thus the coating was provided with excellent wear properties. The weight loss of composite coating was only one twentieth of that of substrate under the same test condition and the abrasion mechanism of the coating was micro-cutting and local adhesive wear.
出处
《现代制造技术与装备》
2010年第3期31-32,34,共3页
Modern Manufacturing Technology and Equipment
基金
山东省科技攻关计划项目(06GG3203009)
