NOUFERROUS METALLURGICAL EQUIPMENT

This paper uses J Mat Pro software to study the kinetic behavior of phase transformation of typical grinding media, ZQCr12 high-chromium cast balls, and analyzes the effects of the austenitizing temperature and alloy composition on the isothermal transformation and continuous cooling transformation of the cast balls. The results show that the suitable austenitizing temperature of ZQCr12 high-chromium cast balls is 850-1000℃. With the increase of the austenitizing temperature and alloy composition, the TTT and CCT curves of ZQCr12 high-chromium cast balls are shifted to the right, the pearlite transformation and bainite transformation are delayed, and the hardenability of castings is increased, thus martensite can be obtained in a lower range of cooling rate.