Grinding Balls for Ball Mill

Annealing is to heat the workpiece to an appropriate temperature, adopt different holding times according to the material and workpiece size, and then slowly cool it. The purpose is to make the internal structure of grinding balls for ball mill reach or be close to an equilibrium state, obtain good process performance and usability, or prepare for further Quenching for tissue preparation. Normalizing is to heat the workpiece to a suitable temperature and then cool it in the air. The effect of normalizing is similar to that of annealing, except that the obtained structure is finer. It is often used to improve the cutting performance of materials, and is sometimes used for parts with low requirements. as final heat treatment.

Quenching is the workpiece after heating and holding, in water, oil or other inorganic salts, organic water solution and other quenching media rapid cooling. After quenching, the steel becomes hard, but at the same time brittle. In order to reduce the brittleness of the steel, the quenched steel is insulated for a long time at an appropriate temperature higher than room temperature and lower than 650 ° C, and then cooled, this process is called tempering. Annealing, normalizing, quenching and tempering are the "four fires" in the overall heat treatment, of which quenching and tempering are closely related and often used together.

With the different heating temperature and cooling methods, different heat treatment processes have evolved. In order to obtain a certain strength and toughness, the process of combining quenching and high temperature tempering is called tempering. After some alloys are quenched to form supersaturated solid solutions, they are kept at room temperature or slightly higher at the appropriate temperature for a long time to improve the hardness, strength or electrical magnetism of the alloys. This heat treatment process is called aging treatment.