Heat treatment in grinding ball production is a process of which grinding
ball being heat and kept in a certain temperature under certain circumstances
and cooled. The grinding ball heat treatment process is quenching.
Quenching has been widely used in modern machinery manufacturing industry.
The important mechanical parts are almost being quenched, especially in
automobiles, aircraft and rockets.
The grinding ball quenching is heating grinding ball to a suitable
temperature and keeping thermostatic after a period of time, then immersing ball
into quenching medium for rapid cooling, so grinding ball microstructure is
transferred with hot and cold alternating. Sometimes, grinding ball also need to
be tempered after quenching. Grinding Ball tempering process is worked with
thermal conditions of different temperatures. The tempered grinding balls can
greatly improve the metal strength, toughness and labor intensity, thereby
improving its wear resistance.
Grinding ball quenching purpose is transferring supercooled austenite to
martensite and making change inside the metal structure of microstructure, and
then with different tempering temperature, to achieve substantial strength,
hardness and fatigue resistance, finally meet the requirements of crushing load
and wear resistance.
