Fabrication of a metal element by induction heating and rapid cooling involves heating only certain zones of the element above the austenite transition temperature and maintaining other zones below this temperature

摘要

Fabrication of a metal element (1) is carried out by heating followed by a hardening by rapid cooling, in which some zones of the metal element remain non-hardened. The metal element is heated by electric conduction heating and only certain zones (4) are heated to a temperature greater than the austenite transition temperature during or before the electric conduction heating. The selective heating effect is obtained by cooling and/or electrically short-circuited and/or thermally short-circuiting in a targeted manner during the induction heating of certain zones (3), in order to maintain the temperature of these zones below the austenite transition temperature.