Process for hardening a steel part by induction quenching and preheating

Abstract

A process for hardening a steel part, comprising an induction quenching step leading to hardening of a surface area of ​​said part, and comprising a preliminary induction preheating step of said part for a specified duration and at a suitable frequency until a temperature above 450°C and at least 50°C below the austenitizing threshold temperature, Ac1, is reached in at least said area. Figure 1 for the abbreviation