The heat treatment process used for 2.9 kg CVT Pulley Shaft is carburizing and quenching, Quenching process is widely used in modern machinery manufacturing industry. The important parts of machinery, especially the steel parts used in automobiles, airplanes and rockets, are almost all quenched. In order to meet the technical requirements of various parts, various quenching processes have been developed.

For example, according to the part of the treatment, there are integral, local and surface quenching; According to whether the phase transformation is complete during heating, there are complete quenching and incomplete quenching (for hypoeutectoid steel, the method is also called subcritical quenching);

The process includes heating, heat preservation and cooling. Taking the quenching of steel as an example, the principle of selecting process parameters in the above three stages is introduced below.

Quenching heating temperature
According to the critical point of transformation of steel, fine and uniform austenite grains are formed during heating and fine martensite microstructure is obtained after quenching.

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