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1. 发明专利

JP2936715B2 失效
公开(公告)号：JP2936715B2
公开(公告)日：1999-08-23
申请号：JP33883390
申请日：1990-11-30
申请人： NIPPON KOKAN KK
发明人： SAGYAMA MASARU , ABE MASAKI , HIRATANI AKIRA , INAGAKI JUNICHI , MORITA MASAYA
IPC分类号： C25D5/26 , C23C2/06 , C23C2/28 , C23C28/02 , C25D5/36

2. 发明专利

JPH11100650A CONTINUOUS PLATING METHOD FOR ZINC BASED MOLTEN METAL AND APPARATUS THEREFOR 失效
公开(公告)号：JPH11100650A
公开(公告)日：1999-04-13
申请号：JP26316697
申请日：1997-09-29
申请人： NIPPON KOKAN KK
发明人： ISHII TOSHIO , HIRATANI AKIRA , TOMONAGA SHINICHI , OISHI HITOSHI , AKASHI KENTARO , FUKUI TAKAYUKI
IPC分类号： C23C2/00 , C23C2/06 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To prevent the quality defect occurring in ash formed from 4 metal fumes evaporated in a snout and to recover the metal fumes discharged outside the equipment as the ash. SOLUTION: At the time of subjecting a steel strip S to zinc based hot dip coating by continuously passing the steel strip S in a zinc based hot tip metal coating tank 4 in which zinc or aluminum zinc alloy is melted, the snout 3 is provided with discharge ports 19, 20 for discharging in-furnace gases including the metal fumes to the outside of the furnace in order to prevent the advance of the metal fumes generated from the molten metal bath surface in the snout 3 into a pre-stage. While the in-furnace gases are regulated to the temp. above the m.p. of the zinc, the in-furnace gases are introduced from the discharge ports into ash recovering sections 51, 52. The temp. of the in-furnace gases introduced into the ash recovering sections 51, 52 is regulated to the m.p. of the zinc or below and the metal fumes included in the in-furnace gases are recovered and removed as the ash. The in-furnace gases from which the metal fumes are removed are then diffused into the outdoor air via a diffusion pipe 8 from the tank.

3. 发明专利

JP2658608B2 失效
公开(公告)号：JP2658608B2
公开(公告)日：1997-09-30
申请号：JP5577591
申请日：1991-02-28
申请人： NIPPON KOKAN KK
发明人： SAGYAMA MASARU , ABE MASAKI , INAGAKI JUNICHI , HIRATANI AKIRA , MORITA MASAYA
IPC分类号： C22C18/04 , C23C2/06 , C23C2/26 , C23C2/28 , C25D5/50

4. 发明专利

JPH09165663A PRODUCTION OF GALVANNEALED STEEL SHEET EXCELLENT IN PRESS FORMABILITY AND POWDERING RESISTANCE 失效
公开(公告)号：JPH09165663A
公开(公告)日：1997-06-24
申请号：JP25245696
申请日：1996-09-03
申请人： NIPPON KOKAN KK
发明人： SAGIYAMA MASARU , ABE MASAKI , INAGAKI JUNICHI , HIRATANI AKIRA , MORITA MASAYA
IPC分类号： C23C2/06 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To produce a galvannealed steel sheet stable in friction characteristics in a coil by applying plating at a lower impregnating sheet temp. prescribed by the relation with the content of Al in a lower content Al bath and prescribing the sheet temp. at the outlet side of a high-frequency induction heating furnace. SOLUTION: Plating is applied in a galvanizing bath contg. Al, and the balance Zn, after that, the regulation of the coating weight is executed, and alloying treatment is executed in a heating furnace so as to regulate the content of Fe in the film to 8 to 12% to produce a galvanized steel sheet. In this method, the plating is executed under the conditions of 0.05 to T>=437.5×[Al%]+408, where [Al%]: the Al content (%) in the bah and T: the impregnating sheet temp. ( deg.C). Then, the Fe-Zn alloying reaction is suppressed in the bath, and, after the plating it is heated in a high-frequency induction heating furnace so as to regulate the sheet temp. at the outlet side of the heating furnace to 495 to 520 deg.C, is held for a prescribed time and is subsequently cooled.

5. 发明专利

JPH04193938A MANUFACTURE OF ALLOYED HOT-DIP GALVANIZED STEEL SHEET EXCELLENT IN PRESS FORMABILITY AND POWDERING RESISTANCE 失效
公开(公告)号：JPH04193938A
公开(公告)日：1992-07-14
申请号：JP32728390
申请日：1990-11-28
申请人： NIPPON KOKAN KK
发明人： SAGIYAMA MASARU , ABE MASAKI , INAGAKI JUNICHI , HIRATANI AKIRA , MORITA MASAYA
IPC分类号： C23C2/06 , C23C2/28
摘要： PURPOSE:To manufacture a zinc plated steel sheet excellent in powdering resistance by plating the steel sheet in the specific condition, cooling after heating and holding to the specific temp. and successively, applying an upper layer plating in the specific condition. CONSTITUTION:The steel for which atom% ratio of adding quantity X of carbide forming element, such as Ti, and C content [C] satis-fying SIGMA X/[C]>=1 is made to a plating raw material. The plating is executed to the plating raw material with an Al-containing galvanizing bath. Fe content in the film is made to 8-12% in a heating furnace. Then the plating is executed in the condition of >= 0.13% Al content in the bath at =50% Fe content is applied at >=1g/cm as the upper layer plating. By this method, the alloyed hot-dip galvanized steel sheet stabilizing the frictional characteristics in a coil can be provided.

6. 发明专利

JP2970410B2 失效
公开(公告)号：JP2970410B2
公开(公告)日：1999-11-02
申请号：JP16774694
申请日：1994-07-20
申请人： NIPPON KOKAN KK
发明人： ABE MASAKI , HIRATANI AKIRA , SAKURAI MICHITAKA , WATANABE TOYOFUMI
IPC分类号： C23C18/34 , C23C2/02 , C23C2/06 , C23C2/28 , C23C28/00 , C25D3/56 , C25D5/10

7. 发明专利

JPH10237610A CONTINUOUS HOT DIP METAL COATING METHOD AND DEVICE THEREFOR 失效
公开(公告)号：JPH10237610A
公开(公告)日：1998-09-08
申请号：JP4093297
申请日：1997-02-25
申请人： NIPPON KOKAN KK
发明人： ISHII TOSHIO , ISHIOKA MUNEHIRO , HIRATANI AKIRA , HATAKEYAMA MASAYUKI
IPC分类号： C23C2/00
摘要： PROBLEM TO BE SOLVED: To provide a hot dip metal coating method capable of drastically preventing the quality defect caused by the sticking of dross in a snout, and to provide a hot-dipping device excellent in durability. SOLUTION: At the time of executing the continuous hot-dip metal coating to a steel strip by passing the steel strips through the inner part of the snout 3 connected to an annealing furnace at the one end and dipped into the hot- dipping bath at the other end and dipping the strips into the molten metal bath M, the interval between the annealing furnace and the snout at the outlet side of the annealing furnace is sealed, and while holding the inner pressure in the snout to lower by >=5mm water heat than the furnace pressure in the annealing furnace and also, to >= the atmospheric pressure, the furnace gas containing metallic vapor vaporized from the molten metal a bath is exhausted to the outside of the furnace from the snout. The furnace gas flows from the annealing furnace to the snout side, and since the metallic vapor vaporized from the molten metal bath M is quickly exhausted to the outside of the furnace, the generation of oxide and condensed material of the metallic vaporized from the molten metal bath can be prevented.

8. 发明专利

JP2770825B2 失效
公开(公告)号：JP2770825B2
公开(公告)日：1998-07-02
申请号：JP25245696
申请日：1996-09-03
申请人： NIPPON KOKAN KK
发明人： SAGYAMA MASARU , ABE MASAKI , INAGAKI JUNICHI , HIRATANI AKIRA , MORITA MASAYA
IPC分类号： C23C2/06 , C23C2/28

9. 发明专利

JP2770824B2 失效
公开(公告)号：JP2770824B2
公开(公告)日：1998-07-02
申请号：JP24868396
申请日：1996-08-30
申请人： NIPPON KOKAN KK
发明人： SAGYAMA MASARU , ABE MASAKI , INAGAKI JUNICHI , HIRATANI AKIRA , MORITA MASAYA
IPC分类号： C23C2/06 , C23C2/28

10. 发明专利

JPH04276053A PRODUCTION OF GALVANNEALED STEEL SHEET EXCELLENT IN PRESS FORMABILITY AND POWDERING RESISTANCE 失效
公开(公告)号：JPH04276053A
公开(公告)日：1992-10-01
申请号：JP5577591
申请日：1991-02-28
申请人： NIPPON KOKAN KK
发明人： SAGIYAMA MASARU , ABE MASAKI , INAGAKI JUNICHI , HIRATANI AKIRA , MORITA MASAYA
IPC分类号： C22C18/04 , C23C2/06 , C23C2/26 , C23C2/28 , C25D5/50
摘要： PURPOSE:To improve the powdering resistance of a galvannealed steel sheet by specifying the relationship between the Al content in a hot-dip galvanizing bath and the steel sheet introducing temp. into the hot-dip galvanizing bath at the time of forming a galvannealing layer on the surface of the steel sheet. CONSTITUTION:A hot-dip galvanizing bath containing >=13% Al is held at 495-520 deg.C and the steel sheet is held for a prescribed time and taken out from the furnace, by which an alloyed Zn-Fe plating layer containing 8-12% Fe is formed. Then, for the purpose of improving coating suitability, a ferrous upper layer coating of >50% Fe content is formed by >=2g/m . By this method, the galvannealed steel sheet excellent in press formability and powdering resistance at the time of forming can be produced.

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