heat treatment of high chromium grinding ball is the main method to obtain good wear resistance. the research on high chromium cast iron ball mainly focuses on chemical composition selection heat treatment process determination modifier selection good carbide type and wear mechanism.
abstract: the heat treatment process of high chromium grinding ball produced by sand coated iron mould casting process was researched. shrinkage and porosity defects have not been discovered after cutting along the diameter of grinding ball. the grinding ball in cast state has poor mechanical properties.
grinding steel ball heat treatment refers to the technique of heating billets to a certain temperature maintaining some time and cooling at different speeds. grinding steel ball heat treatment typically includes heating insulation and cooling processes. these steps connect with each other and can’t be interrupted.
the microstructure of high chromium white cast iron grinding ball as-cast and after heat treatment was observed by metallographic microscope. the sample of 10mm* 10 mm* 8 mm in size at the center of the grinding ball was cut by weld and polished with 200 # to 1500 # metallographic sandpaper.
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heat treatment furnace for grinding balls: heat treatment process is the last process for producing cast grinding media mill balls.the different chrome content in grinding ballsthe heat treatment technology is different. middle casting grinding media balls and low chrome casting grinding media balls just tempering.
the heat treatment of forged grinding ball is the process of heat keep warm then cool down cooled at different speeds. it can not be interrupted in this process. heat treatment process is also one of the important factors to ensure the quality of grinding balls.