![]() Quenching and hardenability concepts were also investigated. Typical austenitization temperatures and holding times used by steel foundries far exceed what is required for transformation to austenite. Time-temperature profiles of furnace control thermocouples can be very different from the time-temperature profiles observed at the center of casting loads in the furnace. Furnace load time-temperature profiles in steel foundries exhibit significant differences depending on heat treatment equipment, furnace loading practice, and furnace maintenance. ![]() Foundry heat treatment trials to develop heat treatment procedure qualifications have shed light on the relationship between heat treatment theory and current practices. ![]() These studies highlight the relationships between critical heat treatment process control parameters and heat treatment success. Heat treatment practices used by steel foundries have been carefully studied as part of comprehensive heat treatment procedure qualification development trials. ![]()
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