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High chromium white cast iron foundry should pay attention to what issues?

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High-CR white cast iron must be in the solidification of the casting process, casting no visible defects are allowed. Foundry in the production process, should be installed in the face of high chromium white cast iron, use the type M7C3 carbide produce Directional solidification, obtaining a perpendicular to the working surface hardness of 1300-1500HV carbon, and can increase the service life of high chromium white cast iron.

Heat treatment process of high chromium white cast iron heating rate should be strictly controlled to prevent cracking. Martensite high chromium white cast iron, substrates after thermal treatment of residual austenite quantity should be below 3% to reduce flaking and cracking. In Foundry production using annealed, quenched and tempered heat treatment process of quenching temperature 920-1050 degrees, tempering temperature of 230-350 degrees.


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