SOLIDIFIED MICROSTRUCTURES AND PHASES OF HIGH SPEED STEELS CONTA1NING DIFFERENT V AND C CONTENT
不同钒,碳含量高速钢的凝固组织及相组成

Using thermal analysis, X-ray diffraction and color etching, the effects of Vand C content in Fe-5Cr-5Mo-5W-V-C alloy on crystallized phases and temperatures were investigated. A relationship between composition and solidified microstructure was obtained. The phase diagrams of pseudo-binary (Fe-5Cr-5Mo-5W-2C)-V and (Fe-5Cr-5Mo- 5W-3V)-C alloy systems and a proiccted diagram of liguid phase boundaries of (Fe-5Cr-5Mo-5W)-V-C alloy system were drawn. The results show that in order to obtain a large amount of dispersed and isolated eutectic VC, a high content of V is required for a low carbon content, and a low content of V is required when the C content is high.