Influence of Quenching Temperature on Transformation Regularity of Reinforced Body for WC/steel Matrix Composites

摘要

WC/steel matrix composites with WC particles of 150 mesh as reinforced body and 5CrNiMo steel as matrix, were prepared by electroslag melting and casting technology. The content of WC was 45%. The influence of quenching temperature on the transformation regularity of reinforced body for WC/steel matrix composites was researched by the metallurgical microscope, scanning electron microscope, energy dispersive X-ray spectroscopy, and X ray diffraction. The results show that with the increasing quenching temperature, the long strip and lump carbides dissolve signally, the network carbide further broke, the retained austenite volume continues to increase, a large number of small dots and rods proeutectoid carbides distribute in the matrix, while the change of the eutectic carbides with dendritic and fishbone shape is not obvious. Under the condition of this experiment, the optimum quenching temperature is 980°C to 1010°C.