Defects caused by improper cooling after forging

Cooling crack of forging parts: during the cooling process after forging, large thermal stress will be generated in the forging due to too fast cooling speed, or large structural stress may be caused by structural transformation. If these stresses exceed the strength limit of the forging, the forging will produce smooth and slender cooling cracks.

Network carbide of forging parts: when forging steel with high carbon content, if the stop forging temperature is high and the cooling speed is too slow, the carbide will precipitate in a network along the grain boundary. Carbide precipitates slowly along the grain boundary of bearing steel at 770 ~ 870 ℃, for example.

Forging network carbide is easy to cause quenching crack during heat treatment. In addition, it also deteriorates the service performance of parts.

OEM High Quality Hot Steel Forging Parts Manufacturer and Supplier in China

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We are a professional manufacturer and supplier of high performance Forging Parts in China with 20 years’ forging technology experience and offers an extensive range forging parts in 40Cr, 42CrMo and C70S6 steel. We are a company with IATF16949: 2016 certification and focus on high quality products.