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71. 发明专利

JPS63179055A HOT DIP GALVANIZED STEEL SHEET EXCELLENT IN ADHESIVE STRENGTH 失效
公开(公告)号：JPS63179055A
公开(公告)日：1988-07-23
申请号：JP908687
申请日：1987-01-20
申请人： NIPPON STEEL CORP
发明人： NOMOTO NOBUO , MAEDA SHIGEYOSHI , ASAI TSUNETOSHI , YAMATO TETSUJI , FUJII SHIRO
IPC分类号： C23C2/06
摘要： PURPOSE:To obtain a hot dip galvanized steel sheet hardly causing peeling of plated extreme surface layer and excellent in adhesive strength, by controlling respective atomic concentrations of Al and Pb as plated extreme surface layer components and simultaneously specifying so that they satisfy a specific inequality. CONSTITUTION:In a hot dip galvanized steel sheet, the atomic concentrations of Al and Pb as components in an extreme surface layer within 100Angstrom from the surface are limited to =2,250psi, a point representing a passing-level adhesive strength of >=2,000psi, and a point representing an adhesive strength of =2,000psi.

72. 发明专利

JP2001342577A ALUMINUM ALLOY PLATE SUPERIOR IN PRESS FORMABILITY 失效
公开(公告)号：JP2001342577A
公开(公告)日：2001-12-14
申请号：JP2000167216
申请日：2000-06-05
申请人： NIPPON STEEL CORP , MITSUI TAKEDA CHEMICALS INC
发明人： MORI YOICHIRO , FUJII SHIRO , SATO YUICHI , TAKADA TAKESHI , TAWA TSUTOMU , KODA CHIKAKO , HIRATA FUMIAKI
IPC分类号： B05D7/14 , B32B15/08 , B32B15/095 , C22C21/02 , C22C21/06 , C23C26/00
摘要： PROBLEM TO BE SOLVED: To provide a specified urethane coated aluminum alloy plate superior in press formability. SOLUTION: Aluminum alloy plate superior in press formability is characterized by providing an alkaline soluble type of lubrication coating with a film thickness of 0.5-10 μm on its both sides or one side, which mainly consists of a polyurethane composition (A), of which the hydrophilic group is a carboxyl group or a sulfonate group with an acid value in the range of 30-180 and a neutralizer of the hydrophilic group is sodium hydroxide or potassium hydroxide, and a lubrication functionalization agent (B) of 1-30 weight % against the polyurethane composition; along with prescribing an alloy composition and a value of difference (TS-YS) between a tensile strength (TS) before press forming and 0.2% yield strength (YS). The alkaline soluble type of lubrication coating preferably further includes silica particles (C) of 1-30 weight % against the polyurethane composition, as a main component.

73. 发明专利

JP2001115272A HOT DIP Zn-Al SERIES PLATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE AND BLACKENING RESISTANCE 失效
公开(公告)号：JP2001115272A
公开(公告)日：2001-04-24
申请号：JP29756499
申请日：1999-10-20
申请人： NIPPON STEEL CORP
发明人： YAMAOKA IKURO , FUJII SHIRO , NISHIMURA KAZUMI , TANAKA AKIRA
IPC分类号： C23C28/00
摘要： PROBLEM TO BE SOLVED: To produce a hot dip Zn-Al series plated steel sheet excellent in corrosion resistance and blackening resistance. SOLUTION: As to this hot dip Zn-Al series plated steel sheet excellent in corrosion resistance and blackening resistance, in a hot dip Zn-Al series plated steel sheet having a plating layer containing, by weight, 0.1 to 70% Al, and the balance Zn with inevitable impurities, the surface of the plating layer is provided with a film layer containing one or two or more kinds of Co compounds by 0.01 to 80 wt.% in the total content.

74. 发明专利

JP2001020049A HOT DIP Zn-Al-Mg PLATED STEEL EXCELLENT IN CORROSION RESISTANCE UNDER NONCOATING AND AFTER COATING AND ITS PRODUCTION 失效
公开(公告)号：JP2001020049A
公开(公告)日：2001-01-23
申请号：JP19207999
申请日：1999-07-06
申请人： NIPPON STEEL CORP
发明人： TAKAHASHI AKIRA , TANAKA AKIRA , SUEMUNE YOSHIHIRO , NISHIMURA KAZUMI , FUJII SHIRO
IPC分类号： C23C2/06 , C22C18/04 , C23C2/26 , C23C2/40
摘要： PROBLEM TO BE SOLVED: To produce plated steel having stably high corrosion resistance even in the case it has a Zn-Al-Mg base plating layer whose metallic structure inevitably changes in the case of industrial production and to provide a method for producing it. SOLUTION: In the method for producing hot dip plating in which the coating weight of plating is 10 to 400 g/m2, and the compsn. of the plating layer is composed of, by weight, 3 to 15% Al and 1 to 8% Mg, and the balance Zn with inevitable impurities, by atomizing powder from an aq. soln. of Mg hydrogen phosphate or Mg silicate before the solidification of plating metal after bath dipping, the plated steel excellent in uniform appearance and excellent in corrosion resistance under uncoating and after coating is obtd. In the obtd. plating layer, Mg hydrogen phosphate or Mg silicate is contained by 0.1 to 1000 mg/m2.

75. 发明专利

JPH09104959A STEEL SHEET EXCELLENT IN MOLD RESISTANCE 失效
公开(公告)号：JPH09104959A
公开(公告)日：1997-04-22
申请号：JP26152595
申请日：1995-10-09
申请人： NIPPON STEEL CORP
发明人： FUJII SHIRO , KANAI HIROSHI
IPC分类号： C23C2/06 , C23C2/12 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To obtain a steel sheet producing a dew condensation resisting effect by the action of voids between powder and a plating metal and the water absorbing property of the powder itself and kept from gathering mold by dispersing a powdery mixture of porous ceramic powder with an antibacterial agent in a plating layer. SOLUTION: A powdery mixture 3 of porous ceramic powder of 1-5μm average particle diameter with an antibacterial agent is dispersed in a plating layer 2 on a steel sheet 1 by 5-80vol.% to obtain the objective steel sheet excellent in mold resistance.

76. 发明专利

JPH09100624A COATED METAL PLATE FOR CONCRETE FORM 失效
公开(公告)号：JPH09100624A
公开(公告)日：1997-04-15
申请号：JP25970095
申请日：1995-10-06
申请人： NIPPON STEEL CORP
发明人： KANAI HIROSHI , FUJII SHIRO , TEFUN MAKOTO
IPC分类号： E04G9/06 , B28B7/38
摘要： PROBLEM TO BE SOLVED: To ensure concrete separating performance and the soundness of a paint film of a bent part by forming a soft paint film, excellent in bending machinability, at a machined part, and forming a hard paint film, excellent in concrete separating performance, at a flat part. SOLUTION: A soft paint film of polyester or the like excellent in machinability is formed only at a machined part 2, subjected to bending, of a metal plate 1 of a concrete form, and a hard paint film only excellent in concrete separating performance is formed at the other flat part 3. An electron or ultraviolet curing paint film is desirable as the paint film excellent in concrete separating performance, and acrylic resin hardened with malamine resin or uretane, hardened by radial polymerization reaction, and the like can be used.

77. 发明专利

JPH08299901A METALLIC SHEET EXCELLENT IN DEW CONDENSATION RESISTANCE 失效
公开(公告)号：JPH08299901A
公开(公告)日：1996-11-19
申请号：JP11092595
申请日：1995-05-09
申请人： NIPPON STEEL CORP
发明人： FUJII SHIRO , KANAI HIROSHI
IPC分类号： E04B1/64 , B05D7/14 , B32B15/08 , C23C2/26 , E04C2/08 , E04F13/12
摘要： PURPOSE: To provide a metallic sheet excellent in dew condensation resistance and exhibiting a dew condensation preventing effect by specifying the thickness of a resin coating film contg. an optimum amt. of a water-absorptive polymer. CONSTITUTION: A metallic sheet 1 consists of a resin coating film layer 3 contg. a water-absorptive polymer. The resin coating film layer 3 contg. >=5wt.% water-absorptive polymer, based on the resin, is formed on the surface of a metal.

78. 发明专利

JPH08277456A PLATED THIN STEEL SHEET HAVING LOW GLOSS 失效
公开(公告)号：JPH08277456A
公开(公告)日：1996-10-22
申请号：JP8296495
申请日：1995-04-07
申请人： NIPPON STEEL CORP
发明人： FUJII SHIRO
IPC分类号： C23C2/26 , C23C30/00
摘要： PURPOSE: To obtain a plated thin steel having low gloss at a low cost by coating the surface of the plating film of a thin steel sheet with a metal powder or a ceramic powder by 5-80% coating rate. CONSTITUTION: The surface of a galvanizing layer 2 of a thin steel sheet 1 is coated with a metal powder or a ceramic powder 3 by 5-80% coating rate. As for the metal powder, a powder of Zn, Al, Cr, Ni, Sn, Co, etc., can be used, and as the ceramic powder, a powder of SiO2 , Al2 O3 , ZrO2 , Cr2 O3 , K2 O, MgO, CaO, SiC, TiC, etc., can be used. The powder coating can be carried out with good productivity at a low cost by spraying the powder to the plating layer after the deposition amt. of the plating layer is controlled by air wiping and before the layer is solidified. Thereby, the plated thin steel sheet having low gloss in which the powder held on the surface of the plated thin steel sheet absorbs or scatters light to decrease the normal reflectance for incident light is obtained.

79. 发明专利

JPH08269667A GALVANNEALED STEEL SHEET HAVING EXCELLENT WORKABILITY AND ITS PRODUCTION 失效
公开(公告)号：JPH08269667A
公开(公告)日：1996-10-15
申请号：JP7626895
申请日：1995-03-31
申请人： NIPPON STEEL CORP
发明人： FUJII SHIRO
IPC分类号： C23C2/28 , C22C38/00 , C22C38/14
摘要： PURPOSE: To provide a galvannealed steel sheet consisting of a Ti-Nb added extra-low carbon steel as a base steel sheet and having excellent workability and a production method thereof. CONSTITUTION: The base steel sheet is the extra-low carbon Ti-Nb added steel. The plating layer components thereof are, by weight %, 8 to 13% Fe and 0.35 to 0.6% Al and the deposit thereof is 20 to 90g/m . The alloy phase in which Al is included at a concn. of >=0.5% is made to exist locally within a range of 2μm around the boundary between the plating layers and the base steel sheet in the sectional structure of the plating layers. The presence frequencies of the local existence phase of the Al are made equal to the size of the crystal grain boundaries of the base steel sheet. The process for production is executed at the effective Al concn. of the plating bath within a range of 0.12 to 0.20%. The Γ phase which is the cause for degradation of the workability of the galvannealed steel sheet is fragmented by allowing the local existence phases of the Al to exist in the steel sheet, by which the occurrence and propagation of crack at the time of receipt of the deformation are prevented.

80. 发明专利

JPH07197278A GALVANNEALED STEEL SHEET HAVING EXCELLENT SPOT WELDABILITY 失效
公开(公告)号：JPH07197278A
公开(公告)日：1995-08-01
申请号：JP29094
申请日：1994-01-06
申请人： NIPPON STEEL CORP
发明人： TAIRA TAKETOSHI , FUJII SHIRO , NAGASE MAGONORI
IPC分类号： C23C2/06 , C23C2/40 , C23C28/00
摘要： PURPOSE:To obtain a galvannealed steel sheet having excellent spot weldability by forming an oxidized film contg. a Ni oxide of a specific thickness on an upper layer of ordinary iron-zinc alloy plating of a first layer. CONSTITUTION:A steel sheet 1 is subjected to galvanizing, then to a heat treatment to diffuse the iron in the base steel sheet into the plating layer, by which the ordinary iron-zinc alloy plating film 2 of the first layer is formed. The oxidized film 3 contg. the Ni oxide of a thickness of 50 to 500Angstrom is formed on the upper layer thereof. This oxidized film 3 is obtd. by forming an ordinary galvannealed steel sheet, then applying a nickel nitrate soln. on the steel sheet or subjecting the film to electrolysis, etc. As a result, the resistance of the steel sheet is enhanced and nugget formation is accelerated in a spot welding. The improvement of number of continuous welding spots is thus stably obtd.

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