Abstract
1. Kinetics for α→γ-transformation are governed by the silicon content in HC, redistribution of silicon between austenite and ferrite, and cast iron heating rate. This dependence expands the transformation range and causes formation of austenite which is inhomogeneous with respect to carbon and silicon concentration. 2. A dependence has been established for the temperature for the start and finish of austenite formation on silicon content in HC and its heating rate. The kinetic diagram plotted makes it possible to select a schedule for high-speed heating of castings for hardening with a given silicon content.
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