Cast Chromium Carbide / Manganese Copper-nickel Alloy Composites

In this dissertation, the interface characteristic between Cu-Ni-Mn alloy and cast chromium carbide were studied, and on the basis of this study, composites of Cu-Ni-Mn alloy reinforced with different volume fraction (0~45%) and different size (42~362μm) of cast chromium carbide particles were made by vacuum hot-pressing liquid sintering technology. Pin on disk two body abrasion tests have been performed under different wear condition, and on the basis of this study, a new wear rate prediction model for composite materials was validated. The results show that the composites were more wear resistant than the matrix, contributing to the "volume effect" and "size effect" , the wear resistance increases with the particle content and size. The composite shows better wear resistance than high chromium cast iron material especially in low load and fine abrasive test condition. The data got from wear rate prediction modal goes well with the data got form the verification tests.