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    • 5. 发明授权
    • Method for producing galvanized steel sheet
    • 镀锌钢板的生产方法
    • US5997664A
    • 1999-12-07
    • US870244
    • 1997-06-06
    • Kenji TaharaJunichi InagakiToyofumi WatanabeMasaaki Yamashita
    • Kenji TaharaJunichi InagakiToyofumi WatanabeMasaaki Yamashita
    • C21D8/04C23C2/02C21D11/00
    • C23C2/02C21D8/041C21D8/0478C21D8/0426C21D8/0436C21D8/0473
    • Method for producing a galvannealed steel sheet wherein a slab consisting essentially of C in an amount of 0.004 wt. % or less, N in an amount of 0.004 wt. % or less, Ti in an amount of 0.01 to 0.15 wt %, Si in an amount of 0.05 wt. % or less, Mn in an amount up to 2.5 wt. %, P in an amount up to 0.1 wt. %, S in an amount of 0.015 wt. % or less, sol. Al in an amount of 0.02 to 0.1 wt. % and the balance being Fe, is soaked for at least 30 minutes at a specified temperature (range). The soaked slab is hot rolled to produce a hot-rolled steel sheet which is coiled at a temperature of 500 to 700.degree. C. The coiled hot-rolled steel sheet is cold rolled at a reduction ratio of 60% or more to produce a cold-rolled steel sheet which is annealed at a temperature of from recrystallization temperature to Ac3 transformation temperature. Galvanizing the annealed cold-rolled steel sheet and then galvannealing at a temperature of 450 to 600.degree. C.
    • 合金化热浸镀锌钢板的制造方法,其中基本上由C组成的板坯的含量为0.004重量% %以下,N为0.004重量% %以下,Ti为0.01〜0.15重量%,Si为0.05重量%。 %以下,Mn为2.5重量%以下。 %,P量高达0.1wt。 %,S为0.015wt。 %以下,溶胶。 Al的量为0.02〜0.1wt。 %,余量为Fe,在规定温度(范围)下浸泡至少30分钟。 将该浸渍的板坯进行热轧,制成在500〜700℃的温度下卷取的热轧钢板。卷取的热轧钢板以60%以上的压下率进行冷轧以产生冷 在从再结晶温度至Ac3转变温度的温度下退火的钢卷钢板。 对退火的冷轧钢板进行镀锌,然后在450-600℃的温度下进行合金化。
    • 6. 发明授权
    • Method for continuously tin-electroplating metal strip
    • 连续锡电镀金属条的方法
    • US5391290A
    • 1995-02-21
    • US38529
    • 1993-03-29
    • Mikiyuki IchibaHiroki IwasaToyofumi WatanabeMasaaki YamashitaKatsumi Kojima
    • Mikiyuki IchibaHiroki IwasaToyofumi WatanabeMasaaki YamashitaKatsumi Kojima
    • C25D3/32C25D5/20
    • C25D5/20C25D3/32
    • A method for continuously tin-electroplating a metal strip, which comprises the steps of: causing a DC electric current to flow between a metal strip and an anode arranged adjacent to the metal strip while passing the metal strip at a travelling speed of at least 1 m/minute through an acidic tin-electroplating solution containing tin ions and an organic acid within a range of from 4.8 to 98 g/l as converted into sulfuric acid, to form a tin-electroplating layer on at least one surface of the metal strip; and applying an ultrasonic vibration, emitted from at least one ultrasonic vibrator and having an intensity within a range of from 0.01 to 1,000 W/100 cm.sup.2 and a frequency within a range of from 25 to 55 kHz, to the acidic tin-electroplating solution between the metal strip and the anode, thereby removing a diffusion layer of tin ions existing in the acidic tin-electroplating solution adjacent to the surface of the metal strip.
    • 一种用于连续锡电镀金属带的方法,其特征在于包括以下步骤:使金属带与邻近金属带布置的阳极之间的直流电流流动,同时使金属带以至少1的行进速度通过 m /分钟,通过含有锡离子和有机酸的酸性锡 - 电镀溶液,其转化为硫酸在4.8至98g / l的范围内,以在金属带的至少一个表面上形成锡 - 电镀层 ; 将从至少一个超声波振子发射的强度为0.01〜1000W / 100cm 2,频率范围为25〜55kHz的超声波振动施加到酸性锡 - 电镀液 金属带和阳极,从而除去存在于与金属带的表面相邻的酸性锡 - 电镀溶液中的锡离子的扩散层。