| 摘要 |
PURPOSE:To heat-treat simultaneously belt-like materials of different kinds or thicknesses by conveying plural belt-like materials in a furnace in such a way that the planes thereof face each other at a prescribed spacing, i.e., the conveying speed of each belt-like material is made variable. CONSTITUTION:Copper alloy strips W1, W2 which are belt-like materials are continuously annealed in a continuous heat treating furnace by the flollowing method: The strips W1, W2 delivered from uncoilers 16A, 16B are held to face each other at a prescribed space and are charged in this state through charging ports 12A, 12B into a furnace 1 kept a prescribed temp. The strips W1, W2 heated in forming a catenary in the furnace 1 are discharged through discharging ports 13A, 13B and are passed through a cooler 1a and a dryer 1b until the strips are coiled with recoilers 17A, 17B. The residence time of the materials W1, W2 in the furnace are adjusted by setting the conveying speeds of the materials W1, W2 respectively at prescribed values in the case of annealing continuously the materials W1, W2 of different kinds, thicknesses, widths, etc. |
