critical cooling rate

critical cooling rate

[′krid·ə·kəl ′kül·iŋ ‚rāt]
(metallurgy)
The minimum cooling rate that will suppress undesired transformations in a metal.
References in periodicals archive ?
To slow the metal's critical cooling rate to approximately 1 [degree] C to 100 [degrees] C per second, "we realized we had to go to a very complicated material," said Johnson the Ruben and Donna Mettler Professor of Engineering and Applied Science at Caltech.
Results also show that a critical cooling rate of about 33.
A physical model for the evaluation of chill formation in iron castings was developed, based on the concept of a critical cooling rate at which a gray to white transition occurs.
With the calculated casting temperature history known, a comparison of simulated cooling rates with critical cooling rates necessary to obtain certain microstructures can be used to determine the microstructure distribution in the casting after quenching.

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