Stabilization of austenite in high-speed steels held above Ms
It was found that for high-speed steels held above Ms the transformation of austenite is delayed during further cooling below Ms to room temperature and the amount of austenite in the quenched steel increases.
The effect of stabilization varies with the temperature and increases as the holding temperature approaches Ms.
Indirect methods showed no diffusion redistribution of carbon or alloying elements between separate microvolumes of austenite in the process of brief holding near Ms.
The effect due to holding above Ms (240–260°) can be used to reduce the distortion of tools during quenching.
KeywordsAustenite Indirect Method Temperature Approach Steel Increase Diffusion Redistribution
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