| 摘要 |
<p>PURPOSE:To shorten the length of a heating furnace and to remarkably improve annealing treatment capacity by using the continuous type heating furnace consisting of a radiation heating zone and induction heating zone at the time of annealing the cold rolled steel strip of a stainless steel. CONSTITUTION:The stainless steel strip produced by cold rolling is annealed to 750-1,100 deg.C in order to relieve work strain. A burner or electric heater is used as a heat source for the annealing furnace 2 for heating and annealing the long-sized stainless steel strip 1 to 750-1,100 deg.C in the continuous type heating furnace 2 and the steel strip is heated to about 60% of the temp. in the furnace in the radiation heating zone 2a in which the atmosphere temp. is kept at 1,000-1,200 deg.C. The point of the time when the temp. difference between the atmosphere temp. and the stainless steel strip 1 decreases is measured by a thermometer 3a and the stainless steel strip 1 is introduced into the induction heating zone 2b by the control device 4 where the steel strip is heated to 750-1,100 deg.C final annealing temp. by the induction heating by an electromagnetic induction effect. The temp. is detected by a thermometer 3b when the steel strip is heated to said temp. the steel strip is then taken out of the annealing device 2 by a control device 4.</p> |
