Patent ID: 8845955
Filing Date: 2014-09-30
Classification: C21D,C22F,F27B,F27D,H05B,Y02P

Abstract:
1. A metal heat treat furnace comprising: an internal heating chamber configured to heat metal to be heat-treated and having a heating portion including a coil supported so that pitches thereof can be adjusted as desired according to sizes or shapes of alloy to be heated and a heating element made of carbon which generates heat when an electric current is fed to the coil; a cooling chamber provided below the heating chamber and configured to cool the metal to be heat-treated, which has been heated by the heating portion; a hollow connection section having a heat insulating function configured to connect the heating chamber and the cooling chamber and provided with a movable gate which partitions the heating chamber and the cooling chamber; a first movable heat-shield panel arranged in a lower portion in the heating chamber and configured to shield heat from the heating chamber; a second movable heat-shield panel arranged in an upper portion in the cooling chamber and configured to shield heat of the heated metal to be heat-treated from being transferred to the gate; and a water-cooled vertically movable shaft disposed through the bottom portion of the cooling chamber, the water-cooled vertically movable shaft being configured to be capable of supporting the metal to be heat-treated and entering the heating chamber, wherein when pitches of the coil are adjusted so as to make the temperature distribution in the interior of the heating portion uniform in a state in which the alloy to be heated is loaded in the heating chamber, uniform heating property, is ensured in the range of ±5° C.