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1. 发明专利

JP2002302750A PRECOATED STEEL SHEET WITH EXCELLENT WORKABILITY AND CORROSION RESISTANCE IN WORKED AREA, AND ITS MANUFACTURING METHOD 审中-公开
公开(公告)号：JP2002302750A
公开(公告)日：2002-10-18
申请号：JP2002015889
申请日：2002-01-24
申请人： NIPPON KOKAN KK , NKK STEEL SHEET & STRIP CORP
发明人： TANAKA YUICHIRO , OI TOSHIHIKO , YOSHIDA KEIJI , INAGAKI JUNICHI , YAMASHITA MASAAKI , MAJIMA YASUHIRO , INOUE NORIO , HORI SHINJI
IPC分类号： B05D7/14 , B32B15/08 , B32B15/18 , C23C2/06 , C23C2/12 , C23C2/28 , C23C2/40 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To provide excellent workability and corrosion resistance in a worked area to a precoated steel sheet using a hot-dip Al-Zn coated steel sheet having 20-95 mass% Al content in the plating coat. SOLUTION: The plating film is obtained by means of the following thermal histories (a) and (b) at least: (a) a thermal history where the average cooling rate within 10 seconds immediately after the steel sheet leaves a hot-dipping bath is regulated to

2. 发明专利

JP2002225177A COATED STEEL PANEL EXCELLENT IN PROCESSABILITY AND PROCESSED PART CORROSION RESISTANCE AND METHOD FOR MANUFACTURING THE SAME 失效
公开(公告)号：JP2002225177A
公开(公告)日：2002-08-14
申请号：JP2001026181
申请日：2001-02-01
申请人： NIPPON KOKAN KK , NKK STEEL SHEET & STRIP CORP
发明人： TANAKA YUICHIRO , YOSHIDA KEIJI , YAMASHITA MASAAKI , MAJIMA YASUHIRO , INOUE NORIO , HORI SHINJI
IPC分类号： B05D7/14 , B05D7/24 , B32B15/08 , C09D5/00 , C09D5/08 , C09D161/20 , C09D163/00 , C09D167/00 , C09D175/04
摘要： PROBLEM TO BE SOLVED: To obtain a coated steel panel having excellent processability extremely reducing the generation of a crack in a coating film and also excellent in processed part corrosion resistance. SOLUTION: The coated steel panel has such a structure that a chemical forming treatment film is provided on the surface of the plating film on a steel panel and an undercoating film (a) and a topcoating film (b) are provided on the chemical forming treatment film. The undercoating film (a) is based on a modified polyester resin (C) and a hardening agent (D), and is obtained by reacting a polyester resin (A) and an epoxy resin (B). The k value represented by formula (1): k=[Wb×(Ma+2×Mb)]/[(Wa+Wb)×2×Mb] wherein, Wa is a solid weight ratio of (A) to [(A)+(B)], Wb is a solid weight ratio of (B) to [(A)+(B)], Ma is a number average mol.wt. of (A), and Mb is a number average mol.wt. of (B)] is 0.7-2.5, and a curing agent (P) and the topcoating film (b) is based on a polyester resin (E) and a hardening agent.

3. 发明专利

JP2002225179A COATED STEEL PANEL EXCELLENT IN PROCESSABILITY AND PROCESSED PART CORROSION RESISTANCE AND METHOD FOR MANUFACTURING THE SAME 失效
公开(公告)号：JP2002225179A
公开(公告)日：2002-08-14
申请号：JP2001067786
申请日：2001-02-01
申请人： NIPPON KOKAN KK , NKK STEEL SHEET & STRIP CORP
发明人： TANAKA YUICHIRO , OI TOSHIHIKO , YOSHIDA KEIJI , INAGAKI JUNICHI , YAMASHITA MASAAKI , MAJIMA YASUHIRO , INOUE NORIO , HORI SHINJI
IPC分类号： B05D1/38 , B05D3/02 , B05D7/14 , B05D7/24 , B32B15/08 , B32B15/09 , C22C18/04 , C22C21/10 , C23C22/12 , C23C22/24 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To obtain excellent processability and processed part corrosion resistance in a coated steel panel using a molten Al-Zn type plated steel panel, which has a plating film with an Al content of 20-95 mass %, as a substrate steel panel. SOLUTION: The plating film is obtained at least through heat history (a), wherein a plating metal subjected to melt plating is coagulated and subsequently heated to temperature T( deg.C) of 130-300 deg.C and next cooled so that an average cooling speed from the temperature T( deg.C) to 100 deg.C satisfies C( deg.C/hr) represented by formula (1): C=(T-100)/2 or less, or/and the average cooling speed from the temperature T( deg.C) of 130-300 deg.C to 100 deg.C after the plating metal subjected to melt plating is coagulated satisfies C ( deg.C/h) represented by the formula (1): C=(T-100)/2 or less. A chemical forming treatment film, an undercoating film having specific constitution and a topcoating film having specific constitution are provided to the surface of the plating film from a lower layer side.

4. 发明专利

JP2002322573A COATED STEEL SHEET HAVING EXCELLENT WORKABILITY AND CORROSION RESISTANCE OF WORKED PART AND PRODUCTION METHOD THEREFOR 审中-公开
公开(公告)号：JP2002322573A
公开(公告)日：2002-11-08
申请号：JP2002015932
申请日：2002-01-24
申请人： NIPPON KOKAN KK , NKK STEEL SHEET & STRIP CORP
发明人： TANAKA YUICHIRO , OI TOSHIHIKO , YOSHIDA KEIJI , INAGAKI JUNICHI , YAMASHITA MASAAKI , MAJIMA YASUHIRO , ISHIDA NOBUYUKI , INOUE NORIO , HORI SHINJI
IPC分类号： B05D7/24 , B05D7/14 , B32B15/08 , C09D5/00 , C09D127/16 , C09D133/00 , C09D163/00 , C09D167/00 , C09D201/00 , C23C2/06 , C23C2/12 , C23C2/28 , C23C2/40 , C23C22/28 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To obtain excellent workability and corrosion resistance of a worked part in a coated steel sheet using a hot dip Al-Zn based plated steel sheet in which the content of Al in the plating film is 20 to 95 mass% as a base steel sheet. SOLUTION: The plating film is obtained by undergoing a heat history at least in the following (a), and the surface of the plating film is provided with a chemical conversion film, and a specified under coating film and a specified top coating film in order from the lower layer side: (a) a heat history where, after the solidification of plating metal applied for hot dip plating, its temperature is raised, and heating is performed to a temperature T ( deg.C) in the range from 130 to 300 deg.C, and after that, the average cooling rate in the range from the temperature T ( deg.C) to 100 deg.C satisfies

5. 发明专利

JP2002226960A PRECOATED STEEL SHEET HAVING EXCELLENT WORKABILITY AND CORROSION RESISTANCE, AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2002226960A
公开(公告)日：2002-08-14
申请号：JP2001026182
申请日：2001-02-01
申请人： NIPPON KOKAN KK , NKK STEEL SHEET & STRIP CORP
发明人： TANAKA YUICHIRO , OI TOSHIHIKO , YOSHIDA KEIJI , INAGAKI JUNICHI , YAMASHITA MASAAKI , MAJIMA YASUHIRO , INOUE NORIO , HORI SHINJI
IPC分类号： B05D7/14 , B32B15/08 , C09D5/00 , C09D161/20 , C09D163/00 , C09D167/00 , C09D175/04 , C23C2/12 , C23C2/28 , C23C2/40 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To obtain excellent workability and corrosion resistance in a precoated steel sheet having 20-95 mass% Al contents in a hot-dip Al-Zn coated layer. SOLUTION: The plating film can be obtained by means of heat histories of at least the following (a) and (b); (a) a heat history where average cooling rate in 10 seconds immediately after the steel sheet leaves a hot dipping bath is made to

6. 发明专利

JP2004339553A Method of producing hot dip metal plated steel strip 审中-公开
公开(公告)号：JP2004339553A
公开(公告)日：2004-12-02
申请号：JP2003135533
申请日：2003-05-14
申请人： Jfe Steel Kk , Jfeスチール株式会社 , Nkk Steel Sheet & Strip Corp , エヌケーケー鋼板株式会社
发明人： ISHIDA NOBUYUKI , INOUE NORIO , NARA TADASHI
IPC分类号： C23C2/02 , C23C2/06 , C23C2/28
摘要： PROBLEM TO BE SOLVED: To provide a method of producing a hot dip metal plated steel strip which has excellent surface appearance by reducing the variation in the temperature of a steel strip dipped into a plating bath.
SOLUTION: As for the method of producing a hot dip metal plated steel strip, in continuous hot dip plating equipment provided with a heating furnace and a cooling furnace, the temperature of a steel strip subjected to annealing treatment is controlled to the one suitable for dipping into a plating bath, thereafter, the steel strip is dipped into a hot dip metal plating bath so as to be passed through and is subjected to hot dip metal plating, and successively, it is taken up from the hot dip metal plating bath to form a hot dip metal coating, the steel strip subjected to the annealing treatment is temporarily cooled to a temperature lower than that suitable for dipping into the plating bath, and is thereafter heated to a temperature suitable for dipping into the plating bath by induction heating.
COPYRIGHT: (C)2005,JPO&NCIPI

7. 发明专利

JP2001049456A PRODUCTION OF CHROMATE TREATED STEEL SHEET EXCELLENT IN ADHESION WITH ORGANIC FILM 失效
公开(公告)号：JP2001049456A
公开(公告)日：2001-02-20
申请号：JP22759299
申请日：1999-08-11
申请人： NIPPON KOKAN KK
发明人： YAMAJI TAKAFUMI , MATSUZAKI AKIRA , YAMASHITA MASAAKI , MISHIMA ICHIRO , INOUE NORIO , OKUMA TOSHIYUKI
IPC分类号： B05D3/02 , B05D3/10 , B05D7/14 , B05D7/24 , C23C22/24 , C23C22/77
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a chromate treated steel sheet by which a chromate film excellent in adhesion with an organic film is formed on a galvanized steel sheet. SOLUTION: The surface of a galvanized or galvannealed alloy steel sheet contg., by weight, >=30% zinc is coated with a chromate treating soln. contg. chronic acid and a chromic acid reduced product in the range of 30 to 70% as a Cr reducing ratio, moreover contg. one or >= two kinds selected from a silica sol, an alumina sol and a titania sol of 1 to 30 nm primary average particle size, also, in which, in the case the total weight in which the weight of the above chromic acid and chromic acid reduced product is expressed in terms of CrO3 is defined (IS A, and the total weight in which the weight of the silica sol, alumina sol and titania sol is respectively expressed in terms of SiO2, Al2O3 and TiO2 is defined as B, 0.83>=B/(A+B)>=0.40 is satisfied, and next, induction heating is executed.

8. 发明专利

JPH11179263A COATED STEEL SHEET PRODUCING DEVICE AND PRODUCTION METHOD 失效
公开(公告)号：JPH11179263A
公开(公告)日：1999-07-06
申请号：JP35792397
申请日：1997-12-25
申请人： NIPPON KOKAN KK
发明人： INOUE NORIO , SUZUKI NOBUTSUGU
IPC分类号： B05D1/28 , B05C9/14 , B05D3/02 , B05D5/06 , B05D7/14
摘要： PROBLEM TO BE SOLVED: To produce a stably colored steel sheet. SOLUTION: This device is provided with a coating means 2 having the coating film thickness control functions 4 and 25 to form a coating film on a traveling steel sheet 1 in a specified thickness, a baking means 5 on the downstream side of the coating means 2 having baking temp. control functions 6 to 8, 26 and 27 to bake the surface of the steel sheet at a specified temp., a color measuring means 13 on the downstream side of the baking means 5 to measure the color of the steel sheet 1, a sheet temp. measuring means 14 for measuring the surface temp. of the sheet 1 close to the color measuring position by the color measuring means 13 and the color changing means 23 and 24 for changing the color measured by the means 13 using the surface temp. measured by the means 14 into a color at the surface temp. as the reference. At least one control target value of the control target values of the coating film thickness control functions 4 and 25 of the coating means 2 or the baking temp. control functions 6 to 8, 26 and 27 of the baking means 5 is adjusted based on the color at the reference surface temp. obtained by the change.

9. 发明专利

JPH1180096A PRODUCTION OF DIMETHYL CARBONATE 失效
公开(公告)号：JPH1180096A
公开(公告)日：1999-03-23
申请号：JP24495197
申请日：1997-09-10
申请人： NIPPON KOKAN KK
发明人： SHIKADA TSUTOMU , ONO YOTARO , INOUE NORIO , MIZUGUCHI MASATSUGU
IPC分类号： B01J31/26 , C07B61/00 , C07C68/04 , C07C69/96
摘要： PROBLEM TO BE SOLVED: To produce dimethyl carbonate in high yield without forming water by a reaction and without deteriorating the activity of a catalyst by reacting dimethyl ether with carbon dioxide in the presence of an alkali metallic salt and methyl iodide. SOLUTION: A catalytic amount of an alkali metallic salt (e.g. anhydrous potassium carbonate) and methyl iodide which is a reactional accelerator and dimethyl ether are charged into a magnetic stirring type autoclave and the interior of the autoclave is sufficiently replaced with carbon dioxide, which is then pressurized at normal temperature to 50 kg/cm . The autoclave is subsequently hermetically sealed. The temperature is then increased while stirring the interior of the autoclave and reaction is carried out at 100 deg.C for 2 hr. The autoclave is then directly cooled with water and the carbon dioxide gas is decompressed to take out the resultant reactional product. Thereby, the objective dimethyl carbonate is obtained in high yield without forming water by the reaction and without deteriorating the activity of the catalyst.

10. 发明专利

JPH10185691A METHOD FOR MEASURING EMISSIVITY AND TEMPERATURE OF OBJECT, AND DEVICE THEREFOR 失效
公开(公告)号：JPH10185691A
公开(公告)日：1998-07-14
申请号：JP34877796
申请日：1996-12-26
申请人： NIPPON KOKAN KK
发明人： YAMADA YOSHIRO , YUASA DAIJIRO , INOUE NORIO , MANABE TOSHIKI
IPC分类号： G01J5/00 , G01J5/02
摘要： PROBLEM TO BE SOLVED: To precisely determine the reflectance of an object to be measured even when a bar-like emitting source has radiation unevenness, and a pass line is fluctuated, and also precisely calculate the surface temperature of the object to be measured. SOLUTION: A light is irradiated to the surface l of an object to be measured by a bar-like emitting source 3, and the reflected intensity distribution is measured by a scanning optical detector 2 to determine the distance between the bar-like emitting source 3 and the object to be measured and the distance between the scanning optical detector 2 and the object to be measured, respectively. The minimum distance between the bar-like emitting source 3 and the object to be measured, the scanning point of the object to be measured, the anticipated angle of the scanning optical detector 2 and the total length of the bar-like emitting source 3 are determined on the basis of these data, and the reflecting intensity of total diffused reflected component and the reflecting intensity of mirror diffused component are obtained on the basis of these data. The total reflecting intensity is determined from the sum of the reflecting intensity of perfect diffused reflected component and the reflecting intensity of mirror diffused reflected component, the reflectance is determined from the total reflecting intensity, the emissivity is determined from the reflectance, and the temperature is further determined.

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