Research on the characteristics of interface-phase Fe6W6C and abrasive-wear performance of WC/Fe matrix surface composite materials

This study examines the three-body abrasive-wear performance of WC/Fe surface composites subjected to different matrices, including high-chromium cast iron (HCCI) and cast steel. These findings indicate that a composite zone can be formed between the matrix and WC preforms, accompanied by a substantial precipitation of carbides. A well-bonded semi-coherent interface forms between Fe6W6C and Fe, and the orientation relationship of Fe (110)BCC//Fe6W6C(111) FCC is the N-W (Nishiyama Wassermann) orientation relationship. The partial density of states indicates that the highest average layout number of W-W bonds at the interface is 0.53, which corresponds to the highest bonding strength at an average bond length of 2.83 & Aring;. Compared with high-manganese steel (HMS) and high-carbon steel (HCS) specimens, the HCCI specimen exhibits the lowest weight loss of 0.075 g. Furthermore, its surface roughness is low (3.337 mu m), and its wear resistance is 24.09 % and 15.59 % greater than those of the HMS and HCS specimens, respectively.