METHOD FOR IMPROVING THE STRUCTURE OF A STEEL COMPONENT AFTER HEATING AND STELL COMPONENT OBTAINED BY THE METHOD

摘要

The present disclosure relates to a method for improving the steel structure of a steel component after heating including the steps of heating the steel component to a temperature of at least 1100° C., quenching the steel component to a temperature above the martensite start temperature (Ms) to form bainite, and maintaining the steel component at that temperature for a holding time sufficient for transformation of all austenite to bainite, re-heating the steel component to a temperature of at least 580° C. but below the Ac1 transformation temperature, and maintaining the steel component at that temperature for the steel component to exhibit a hardness of 45 Rockwell hardness C or below, and cooling the steel component.

主权项

1. A method for restoring a steel structure for a steel component after heating characterized in that it comprises the steps of:
a) heating a steel component to a temperature of at least 1100° C., b) quenching the steel component to a temperature above the martensite start temperature (Ms) to form bainite, and maintaining the steel component at that temperature for a holding time sufficient for transformation of all austenite to bainite, c) re-heating the steel ring to a temperature of at least 580° C. but below the Ac1 transformation temperature, and maintaining the steel ring at that temperature for the steel ring to exhibit a hardness of 45 Rockwell hardness C or below, d) cooling the steel ring.