摘要
以Fe-25Cr-7C合金粉末为原料，利用等离子熔敷技术，在Q235钢表面制备（Cr，Fe）7C3／γ—Fe金属陶瓷复合材料涂层。利用光学金相显微镜、扫描电子显微镜、X射线衍射仪及能谱仪分析了涂层的显微组织结构，同时考察了涂层在室温干滑动磨损试验条件下的耐磨性。结果表明：涂层显微组织为（Cr，Fe）7C3初生相均匀分布于γ-Fe基体上，具有快速凝固的特点，涂层与基材之间为完全冶金结合。等离子熔敷（Cr，Fe）7C3金属陶瓷复合材料涂层具有很高的硬度，在室温干滑动磨损试验条件下具有优异的耐磨性；涂层具有较高的硬度，较强的金属原子间结合力并且组织细小均匀，使得该涂层具有优异的耐磨性能。
A wear resistant （Cr, Fe）7C3/γ- Fe cermet composite coating was fabricated on substrate of the Q235 steel by plasma cladding with （ wt% ） Fe- 25Cr- 7C elemental powder blends. Microstructure of the coating was characterized by OM, SEM, XRD and EDS. Wear resistance of the coating was tested under dry sliding wear condition at room temperature. The results indicate that the plasma clad cermet composite coating has a rapidly solidified fine microstructure consisting of （Cr, Fe）TC3 primary particles uniformly distributed in the γ- Fe matrix and is metallurgi- cally bonded to the Q235 steel substrate. The plasma clad （Cr, Fe）7C3/γ -Fe cermet composite coating has high hardness and excellent wear resistance under dry sliding wear test conditions. The excellent wear resistance of the （Cr, Fe）7 C3/γ- Fe cermet composite coating is attributed to the high hardness of the coating, strong covalent atomic bonding and refined microstructure.
出处
《实验技术与管理》
CAS
2008年第12期47-51,共5页
Experimental Technology and Management
