| 摘要 |
The invention concerns heating metal strips or other coilable strand metal object to an elevated temperature, wherein the metal object is passed in a heating section through a furnace chamber that is made at least partly of an insulating and electrically non-conductive material while being heated through transverse flux induction heating (TFIH) by transverse flux induction heating elements located outside of the chamber which contains a protective non-oxidizing gas or gas mixture. The metal object is of stainless steel that has been cold rolled to a very high degree of surface reflectivity. The cold rolled stainless steel object is passed through the furnace chamber and is heated in the chamber to a processing temperature between 700 and 1200° C. The cold rolled stainless steel object is maintained at that temperature between 700 and 1200° C. long enough for the steel to recrystallize completely, and the heat treated metal object then is rapidly cooled directly from the processing temperature in an airtight cooling section through which the non-oixidizing gas is passed to a temperature below 600° C. |
