关键词: 正交设计, 高碳高铬钢, 含铬灰铸铁, 离心铸造, 复合界面, 碳化物

Abstract: The chemical compositions of high carbide high chromium steel and chromium-bearing grey cast iron were optimized through orthogonally designed experiments which were carried out on a horizontal cantilevered centrifugal machine to compound the steel and cast iron by way of a centrifugal casting process. Under different experimental conditions, the successfully compounded interfaces were obtained and carefully compared with each other and analyzed by microscopy. The results indicate that a compact compound layer as the interface is found between the steel and cast iron. After water quenching at 1080°C for 1 hr then tempering at 500°C for 1 hr, although the carbides in the interface diffuse better, they do not affect the interface width. However the higher the casting temperature is, the wider the interface will be, if the casting temperature of the steel increases up to 1480°C from 1460°C, the interface width will increase by 100 μm.