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1. 发明授权

US4956025A Process for producing cold-rolled high strength steel sheet having excellent formability and conversion-treatability 失效
标题翻译：具有优异的成形性和转化处理性的冷轧高强度钢板的制造方法
公开(公告)号：US4956025A
公开(公告)日：1990-09-11
申请号：US292120
申请日：1988-12-30
申请人： Kazuo Koyama , Taketoshi Taira , Kaoru Kawasaki , Atsushi Itami , Nobuhiko Matsuzu
发明人： Kazuo Koyama , Taketoshi Taira , Kaoru Kawasaki , Atsushi Itami , Nobuhiko Matsuzu
IPC分类号： C21D9/46 , C21D8/02 , C21D8/04 , C21D9/56 , C22C38/00 , C22C38/14 , C23C22/78
CPC分类号： C21D8/0426 , C21D8/0436 , C21D8/0473
摘要： A process for producing a cold-rolled high strength steel sheet having an excellent formability and conversion-treatability, comprising the steps of: heating to a temperature of 1150.degree. C. or lower, a steel slab comprising; 0.005 wt % or less of C, 0.5-1.5 wt % of Si, 0.1-0.5 wt % of Mn, 0.003-0.05 wt % and at least 3.4.times.N wt % of Ti, 0.003-0.05 wt % and at least 7.8.times.C wt % of Nb, 0.01-0.1 wt % of Al, 0.05-0.15 wt % of P, 0.010 wt % or less of S, 0.005 wt % or less of N, 0.0001-0.0050 wt % of B, the balance consisting of Fe and unavoidable impurities; hot-rolling the steel slab with a finishing rolling temperature of the A.sub.r3 point of the steel or higher to obtain a hot-rolled steel sheet; cooling the hot-rolled steel sheet at a cooling rate of 10.degree. C./sec or more in the stage between said finishing rolling and the following coiling step, with the provision that said cooling is started not later than 2 sec after the hot-rolling is finished and is continued for a duration of at least 3 sec; coiling the steel sheet at a temperature of 650.degree. C. or higher; cold-rolling the steel sheet at a usual rolling draft; and continuous-annealing the cold-rolled steel sheet at a heat-cycle of holding for 1 sec or longer at a temperature of 930.degree. C. or lower to complete the recrystallization of the cold-rolled steel sheet.
摘要翻译：一种制造具有优异的成形性和转化处理性的冷轧高强度钢板的方法，包括以下步骤：加热至1150℃或更低的温度，包括： 0.005重量％以下的C，0.5-1.5重量％的Si，0.1-0.5重量％的Mn，0.003-0.05重量％和至少3.4×N重量％的Ti，0.003-0.05重量％和至少7.8重量％的Nb，0.01〜0.1重量％的Al，0.05〜0.15重量％的P，0.010重量％以下的S，0.005重量％以下的N，0.0001-0.0050重量％的B，余量由Fe和不可避免的杂质; 以钢的Ar3点的精轧温度对钢坯进行热轧或更高的热轧，得到热轧钢板; 在所述精轧和后续卷取步骤之间的阶段以10℃/秒以上的冷却速度冷却热轧钢板，其条件是所述冷却不迟于热轧后的2秒开始，轧制完成并持续至少3秒的持续时间; 在650℃以上的温度下卷取钢板; 以通常的轧制条件对钢板进行冷轧; 在930℃以下的温度下保持1秒以上的热循环，对冷轧钢板进行连续退火，完成冷轧钢板的再结晶。

2. 发明授权

US5000828A Process for producing one-side electrogalvanized steel sheet with distinguished susceptibility to phosphate salt treatment and distinguished appearance on the non-electrogalvanized side 失效
标题翻译：用于生产具有对磷酸盐处理的敏感性的单面电镀锌钢板的制造方法和在非电镀锌面上的出色外观
公开(公告)号：US5000828A
公开(公告)日：1991-03-19
申请号：US505657
申请日：1990-04-06
申请人： Yoshio Shindou , Taketoshi Taira , Shirou Fujii
发明人： Yoshio Shindou , Taketoshi Taira , Shirou Fujii
IPC分类号： C25D5/26 , C25D5/02 , C25F1/00 , C25F5/00
CPC分类号： C25F1/00 , C25D5/028
摘要： A one-side electrogalvanized steel sheet with a distinguished susceptibility to a phosphate salt treatment and a distinguished appearance on the non-electrogalvanized side is produced by subjecting the non-electrogalvanized side of a steel sheet after one-side electrogalvanization in a galvanizing bath to an electrolytic peeling treatment using the non-electrogalvanized side of the one-side electrogalvanized steel sheet as an anode in an electrolytic peeling treatment bath containing 5 to 30% by weight of sodium sulfate as an electroconductive agent and at least 0.1% by weight of boric acid as a pH-controlling agent at a pH adjusted to a range of 5.0 to less than 9.0 as a posttreatment of the non-electrogalvanized side.

3. 发明授权

US4705726A Anticorrosive weldable coated steel 失效
标题翻译：防腐焊接涂层钢
公开(公告)号：US4705726A
公开(公告)日：1987-11-10
申请号：US10074
申请日：1987-02-02
申请人： Yoshio Shindou , Joji Oka , Taketoshi Taira , Yujiro Miyauchi , Fumio Yamazaki
发明人： Yoshio Shindou , Joji Oka , Taketoshi Taira , Yujiro Miyauchi , Fumio Yamazaki
IPC分类号： B05D7/24 , B05D5/12 , B05D7/14 , B23K35/22 , C09D5/10 , C23C28/00 , C23C30/00 , B22F7/04
CPC分类号： C23C28/025 , B23K35/226 , C09D5/106 , C23C28/021 , Y10T428/12063 , Y10T428/12125 , Y10T428/12799
摘要： A weldable steel plate plated with zinc, a zinc base alloy or zinc composite and coated on the plating with a coating material comprising a mixture of at least one type of ferrous alloy powder with an oxygen concentration of 1.0% by weight or less and zinc dust, is provided, and the weldable coated steel plate also has good workability, coherence, weldability and corrosion resistance.
摘要翻译：一种镀有锌，锌基合金或锌复合材料的可焊接钢板，并用涂覆材料涂覆包含至少一种氧浓度为1.0重量％以下的铁合金粉末和锌粉尘的混合物，并且可焊接的涂层钢板也具有良好的可加工性，相干性，可焊性和耐腐蚀性。

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