Diffusion phenomena between alloy steel and gray cast iron in layered bimetallic casting

The work presents bimetallic layered casting technology in configuration: the upper layer of high chromium steel or chrome-nickel steel with layer made of cast iron casting. In presented technology of layered bimetallic castings steel elements with a thickness of 1.5 and 5mm. It was used a process of overlay of a surface layer, directly during casting process so-called mould cavity preparation method. Steel elements were placed in sand mould just before pouring the liquid gray cast iron. Verification of bimetallic castings was based on ultrasonic non-destructive testing and examination of the structure and selected utility properties.