1982-02-01

High Temperature Carburizing Steel Bars for Saving Energy Consumption in the Automobile Industry 820127

ABSTRACT

Carburizing heat treatment is one of the automobile component manufacturing steps, which consumes a large amount of energy. Raising the carburizing temperature can shorten the carburizing time and save the energy, but involves the risks of grain coarsening and attendant property deterioration. The authors have clarified the precipitation behavior of aluminum nitride (A1N) in the automobile gear manufacturing process and the optimum precipitation of A1N in as-rolled steel bars to prevent the grain coarsening. Through the application of the controlled rolling technique to ensure the optimum precipitation of A1N in continuously cast steel of uniform chemical composition, the authors have substantially saved energy while maintaining high quality, and developed a high-temperature carburizing steel expected to minimize and stabilize quenching strains.

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