摘要
等离子喷涂工艺作为一种表面强化方法,已广泛应用于耐磨、减摩、耐蚀和耐高温等功能涂层的制备。采用等离子喷涂技术,在Q235钢表面制备Cr3C2和Cr3C2/MoS2复合自润滑涂层。对涂层的耐磨特性进行摩擦磨损实验研究,测定显微硬度,并分析涂层的微观结构和物相组成。结果表明,Cr3C2及Cr3C2/MoS2复合涂层的表面硬度平均提高近9倍;在室温干摩擦条件下,Cr3C2型喷涂层的抗磨性能比Q235基体有大幅度提高,加入一定量的MoS2即可维持Cr3C2型涂层的高硬度和抗磨损性能,又可有效降低摩擦因数。
As an important surface hardening method,the plasma spray shows its unique advantages in abrasion resistance,friction reduction,corrosion resistance and heat resistance functional coating preparation.The Cr3C2 and Cr3C2/MoS2 self-lubricating coatings were prepared on the surface of Q235 steel by a plasma spray process.Tribological properties of these coatings were investigated on a ring-block friction and wear tester.The microstructures,phases and micro-hardness were studied by SEM,XRD and micro-hardness meter.The experimental results show that the micro-hardness of Cr3C2 and Cr3C2/MoS2 self-lubricating coatings increases about 9 times compared to Q235 steel.At the conditions of the room temperature and dry friction,the wear resistance of Cr3C2-type plasma sprayed coating is greatly improved compared to Q235 steel.MoS2 can maintain the higher hardness and wear resistance,and reduce the friction coefficient of Cr3C2-type plasma sprayed coating.
出处
《润滑与密封》
CAS
CSCD
北大核心
2011年第5期15-19,共5页
Lubrication Engineering
基金
清华大学摩擦学国家重点实验室开放基金项目(SKLTKF08A01)
