Heat treatment process: It is difficult to quench the wear resistant cast ball, mainly because the quenching requires martensite, and the cooling rate must be higher than the critical cooling rate (VK). During quenching, how can martensite be obtained and the effect of stress reduced? This is a major problem in the quenching process. To […]

Without heat treatment, the as-cast cast iron grinding ball’s microstructure is austenite + eutectic carbide, which is heated at lower quenching temperature (such as below 950 °c). After Air Cooling, the microstructure contains austenite, eutectic carbide, and martensite; there is also a large troostite (see Fig. 2A). At higher quenching temperature (above 980 °C), the […]