| 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 (5) through a furnace chamber (17) that is made at least partly of an insulating and electrically non-conductive material while being heated through transverse flux induction heating (TFIH) by means of transverse flux induction heating elements (15, 16) located outside of said chamber which contains a protective non-oxidising gas or gas mixture. The invention is characterised in that the metal object is a stainless steel object that has been cold rolled to a very high degree of surface reflectively, that the cold rolled stainless steel object is passed through said furnace chamber and is heated in said chamber to a processing temperature between 700 and 1200 DEG C, that the cold rolled stainless steel object is maintained at said temperature between 700 and 1200 DEG C for long enough for the steel to recrystallize completely, and that the heat treated metal object then is rapidly cooled directly from the processing temperature, in an airtight cooling section (6, 27) through which the non-oxidising gas is passed, to below a temperature of 600 DEG C. |
