Published: Jan 2010
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The generalized equation for cooling time calculation, based on regular thermal condition theory, was achieved and used in thermal engineering in  and is presented in this introduction below. It has been widely used in the heat-treating industry in the countries of the former Soviet Union to develop two-step quenching processes . An analytical equation for cooling time calculation is also needed to develop a method for calculating ideal critical diameter, which is based on accurate CCT (continuous cooling transformation) diagram. The ideal critical diameter is used for optimization of the intensive quenching processes. In the last decade, the generalized equation has been used in the United States to develop recipes for intensive quenching—so-called IQ-3 technology—which explores direct intensive turbulent convection .
Kobasko, N. I.
IQ Technologies, Inc.Intensive Technologies Ltd., AkronKyiv, Ohio