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Gears and shafts made of case-hardening steel are common components in transportation equipment, and carburization applied to them improves their mechanical properties such as fatigue strength and wear resistance. The carburization process requires a considerably long time because it is based on carbon diffusion deep into the steel from the surface, especially for large components of huge construction equipment, for example. The processing time can be reduced by increasing the carburization temperature, leading to an increase in productivity and a decrease in manufacturing cost. The conventional gas carburization process typically requires 12 h at 930°C to achieve a carburization Effects of Cooling Rate after Hot Forging on Precipitation of Fine Particles during Subsequent Normalizing and Austenite Grain Growth during Carburization of Aland Nb-microalloyed Case-hardening Steel

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Effects of Cooling Rate after Hot Forging on Precipitation of Fine Particles during Subsequent Normalizing and Austenite Grain Growth during Carburization of Al- and Nb-microalloyed Case-hardening Steel