61HRC Motor Shafts Automobile Motor Parts 22 Tooth Width

The heat treatment process of the product is carburizing and quenching, and its material is generally low carbon steel or low carbon alloy steel (carbon content less than 0.25%). After carburizing, quenching must be carried out to give full play to the beneficial role of carburizing.

The surface microstructure of the workpiece after carburizing and quenching is mainly martensite with high hardness plus residual austenite and a small amount of carbide, and the core structure is low carbon martensite with good toughness or containing non-martensite, but ferrite should be avoided.

General carburizing layer depth range of 0.8~1.2 mm, depth of carburizing can reach 2 mm or deeper. The surface hardness is HRC58~63, and the core hardness is HRC30~42.

After carburizing and quenching, the surface of the workpiece produces compressive internal stress, which is beneficial to improve the fatigue strength of the workpiece. Therefore, carburizing is widely used to improve the strength, impact toughness and wear resistance of parts, so as to extend the service life of parts.

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