| 摘要 |
PROBLEM TO BE SOLVED: To eliminate the occurrence of a white powder by preventing an atmospheric gas containing formed impurities from getting into a front chamber side which constitutes a cooling region in a charging side. SOLUTION: The annealing method is a method of continuously bright-annealing the strip 1 in a reducing atmosphere while discharging a reducing atmospheric-gas from a charging port 12 and a carrying-out port 14 in a continuous bright-annealing furnace A, including, the cooling region 3 in the charging side arranged along a transportation path 2 of a strip 1, an annealing region 4, a cooling region 5 in a carrying-out side, an intermediate region 6 which connects the annealing region 4 with the cooling region 5 in the carrying-out side and a gas supply apparatus 7. A discharge resistance of the furnace gas at the carrying-out port 14 is lowered than that at the charging port 12; a gas supply port 8 in the charging side of the gas supply apparatus 7 is connected with the cooling region 3 in the charging side; and a supplied reducing atmospheric-gas 10a is flown from the cooling region 3 in the charging side to the direction of the annealing region 4 to eliminate annealing unevenness caused by the white powder and other impurities. COPYRIGHT: (C)2011,JPO&INPIT |
