摘要
运用5kWCO2连续激光器在低碳钢表面激光熔覆Cr3C2/Co涂层,研究了其组织、结构、显微硬度及滑动磨损性能,并用激光熔覆钴基合金涂层(Co50)进行了对比试验。结果表明,Co50涂层的显微组织是以亚共晶方式结晶的枝晶组织,Cr3C2/Co涂层组织为未熔Cr3C2颗粒、长杆状、多边形块状Cr的碳化物及其间的细小的枝晶和共晶组织。Co50涂层的主要组成相是γ-Co及(Cr,Fe)7C3,Cr3C2/Co涂层的主要组成相为γ-Co,Cr7C3,Cr23C6和Cr3C2等。激光熔覆Cr3C2/Co涂层比Co50涂层具有更高的硬度和耐磨性。
Laser cladding Co-based alloy coating with 20%Cr3C2(Cr3C2/Co) on 16Mn steel substrate has been obtained by 5 kW CO2 continuous wave laser. Microstructure , phase, hardness and wear resistance of the Cr3C2/ Co coatings have been studied and have been discussed in contrast with which of the Co-based(Co50) coatings. The results show that the microstructure of the Co50 coatings is dendrite crystallized hypoeutectic. And which of the Cr3C2/Co coatings is Cr3C2 grains hadn't melted, rhombohedral shape carbide, final dendrite and eutectic. Constituent phase of the Co50 coatings mainly are γ-Co, (Co,Fe)7C3 and which of the Cr3C2/Co are mainly γ-Co,Cr7C3,Cr23C6 and Cr3C2. Micro-hardness and wear resistance of the Cr3C2/Co coatings are much higher than that of the Co50 .
出处
《安徽工业大学学报（自然科学版）》
CAS
2004年第3期239-242,共4页
Journal of Anhui University of Technology（Natural Science）
基金
安徽省教育厅自然科学基金项目(2003kj058)
