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11. 发明专利

JPH11302815A HOT DIP AL-ZN ALLOY COATED STEEL SHEET EXCELLENT IN WORKABILITY AND WHITE RUST RESISTANCE 失效
公开(公告)号：JPH11302815A
公开(公告)日：1999-11-02
申请号：JP12397398
申请日：1998-04-17
申请人： NIPPON KOKAN KK
发明人： OI TOSHIHIKO , INAGAKI JUNICHI , YAMASHITA MASAAKI , ISHIDA NOBUYUKI , JIROUMARU KAZUMI , OKUMA TOSHIYUKI
IPC分类号： B05D7/14 , C23C2/06 , C23C2/12 , C23C22/30 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To improve the workability and white rust resistance of a hot dip Al-Zn alloy coated steel sheet. SOLUTION: Relating to the hot dip Al-Zn alloy coated steel sheet containing 20 to 95 wt.% Al in a plating film, the ratio of Al concentration between the average Al concentration [s] at the surface of the plating film and the Al concentration [d] in a dendritic part in the plating film, s/d, is regulated to >=0.6. It is preferable to regulate the coating weight of the plating film per side to .

12. 发明专利

JPH11302814A HOT DIP AL-ZN ALLOY COATED STEEL SHEET EXCELLENT IN WORKABILITY AND WHITE RUST RESISTANCE 失效
公开(公告)号：JPH11302814A
公开(公告)日：1999-11-02
申请号：JP12397298
申请日：1998-04-17
申请人： NIPPON KOKAN KK
发明人： OI TOSHIHIKO , INAGAKI JUNICHI , YAMASHITA MASAAKI , ISHIDA NOBUYUKI , JIROUMARU KAZUMI , OKUMA TOSHIYUKI
IPC分类号： B05D7/14 , C23C2/06 , C23C2/12 , C23C22/30 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To improve the workability and white rust resistance of a hot dip Al-Zn alloy coated steel sheet. SOLUTION: Relating to the hot dip At-Zn alloy coated steel sheet containing 20 to 95 wt.% Al in a plating film, the ratio of Al concentration between a part [z] having the lowest Al concentration in the plating film and a dendritic part [d], z /d, is regulated to 0.20-1.0. It is preferable to regulate the coating weight of the plating film per side to $45g/m.

13. 发明专利

JPH10251863A ZINC PHOSPHATE-TREATED STEEL SHEET FOR LAMINATION AND ITS PRODUCTION METHOD 失效
公开(公告)号：JPH10251863A
公开(公告)日：1998-09-22
申请号：JP243998
申请日：1998-01-08
申请人： NIPPON KOKAN KK
发明人： TAJIRI YASUHISA , INOUE NORIO , KATO HIROYUKI , NORO HISATO , JIROUMARU KAZUMI
IPC分类号： C23C22/12 , C23C22/24 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To provide a method for producing a zinc phosphate-treated steel sheet for lamination by which the adhesion and corrosion resistance of the conventional phosphated steel sheet for polymer film lamination are remarkably improved. SOLUTION: A zinc phosphate film at 0.2-1.2g/m and a chromate film at 3-50mg/m are successively formed on a hot dip galvanized steel sheet. In this case, the zinc phosphate film has an island part not coated with the zinc phosphate film and having 30μm to 1mm breadth and length, the total surface area of the parts not coated with the zinc phosphate film is 5-70% of the surface area of the steel sheet, and the film adhesion and the film-laminated corrosion resistance are excellent.

14. 发明专利

JPH0615313A LOCAL SPRAY NOZZLE DEVICE FOR ROLLING ROLL AND DEVICE AND METHOD FOR LOCAL COOLING 失效
公开(公告)号：JPH0615313A
公开(公告)日：1994-01-25
申请号：JP17255692
申请日：1992-06-30
申请人： HITACHI LTD , NIPPON KOKAN KK
发明人： KIMURA TOMOAKI , SEKIYA TERUO , MASUDA SADAKAZU , JIROUMARU KAZUMI , HIGAKI KOZO
IPC分类号： B21B27/10 , B21B28/04
摘要： PURPOSE:To prevent the cooling ability from being changed even when the diameter of the rolling roll is varied, to limit a dispersing range of a jetted cooling liquid, to prevent the reduction of the concentration of the oil of a coolant for cooling a rolling roll and to accurately correct the shape of a rolled stock by surely, automatically and locally cooling defective places in the shape of a rolling roll with a local spray nozzle device. CONSTITUTION:The local spray nozzle devices are arranged in three places in total in the vicinities of the center part and both end parts in the axial direction of a work roll 1 and respectively provided with a 1st wall body 22, sealing part 24 which is provided in the end part of the 1st wall body 22 and for which the sealing degree is adjustable and 2nd wall body 23 with which the spray liquid 50 is enclosed in the inside of the 1st wall body 22. The cooling liquid after cooling the work roll 1 is recovered from a lower drainage port 26 through a clearance 23a.

15. 发明专利

JPH0523724A WARM ROLLING EQUIPMENT FOR STEEL SHEET 失效
公开(公告)号：JPH0523724A
公开(公告)日：1993-02-02
申请号：JP19994491
申请日：1991-07-15
申请人： NIPPON KOKAN KK
发明人： NAKAYAMA YASUTOSHI , TANABE SHUNICHI , JIROUMARU KAZUMI , BABA YUTAKA
IPC分类号： B21B1/22 , B21B39/00 , B21B45/00
摘要： PURPOSE:To prevent steel sheet from falling in temperature and breaking, etc., by injecting steam from a steam injecting header and rolling the steel sheet as the temperature of the steel sheet is held. CONSTITUTION:The steam injecting header 4 is arranged only above the passing position of the steel sheet between stand No.1 and stand No.2 but is arranged above and below the passing position of the steel sheet between stands after them. Each steam injecting header 4 has many, injectors along the longitudinal direction. In this way, the hot rolling of silicon steel sheet high in transition temperature can be carried out without generating such a trouble as breaking etc., adequately and efficiently.

16. 发明专利

JPH0289513A METHOD FOR ROLLING METALLIC PLATE 失效
公开(公告)号：JPH0289513A
公开(公告)日：1990-03-29
申请号：JP23905788
申请日：1988-09-26
申请人： NIPPON KOKAN KK
发明人： SHIRAISHI KAORU , HIRABAYASHI SATORU , JIROUMARU KAZUMI , TOYOFUKU TATSUO , OKAYAMA NORIYASU
IPC分类号： B21B1/28 , B21B37/00 , B21B37/68
摘要： PURPOSE:To smooth passing the plate to obtain a straight plate and to prevent generating roll flaws by detecting a bias elongation through a non-contact sensor and correcting it on the preceding stand. CONSTITUTION:When a point A on the front end of the plate is moved by (s) in the rolling direction, by (r) in the direction orthogonal to the rolling direction, and the angle formed by the moving direction of the front end of the plate with the angle orthogonal to the rolling direction is defined as theta2, tantheta2=r/ s, the bias elongation (z) is z=atan(theta1-theta2), i.e., if the values (x), (y), (r), (s) are measured, the bias elongation is able to define strictly. The signals measured by evaluating the image of the plate 1 through an image sensor 3 are converted into (x), (y), (r), (s) through a computing element 4, then, these are converted to theta1, theta2 by a computing element 5, furthermore, converted to (z) through a computing element 6.

17. 发明专利

JPS61276705A COLD ROLLING METHOD FOR DECREASING EDGE DROP 失效
公开(公告)号：JPS61276705A
公开(公告)日：1986-12-06
申请号：JP11665385
申请日：1985-05-31
申请人： NIPPON KOKAN KK
发明人： IWATO SHUICHI , KUWAMOTO HIROSHI , JIROUMARU KAZUMI
IPC分类号： B21B1/28 , B21B27/02 , B21B37/00
摘要： PURPOSE:To obtain a good sheet thickness profile with decreased edge drops in >=3 stands of cold tandem rolling by tapering both or one ends of the work rolls of rolling rolls of the 1st and 2nd stages from the inlet side thereof. CONSTITUTION:The work rolls tapered at both or one ends are incorporated into the rolling rolls of at least the 1st and 2nd stages from the inlet side of >=3 stands of the cold tandem rolling rolls. More specifically, each of the work rolls has an initial crown in the central part and has the convergent tapers consisting of the rotating surface having part of a sine curve or the curve approximate thereto from the position inner by the distance of 10-20 times the thickness of the base sheet to the inside of the width of the strip at both ends. Such work rolls are incorporated vertically symmetrically into the rolling mill. The work rolls having such taper on one side are incorporated vertically point symmetrically into the mill. The drafts in the 1st and 2nd stages are set at about 15-35%, by which the edge drops are decreased to about one-third the edge drops of the conventional material.

18. 发明专利

JPS60121284A DETERGENT COMPOSITION FOR METAL 失效
公开(公告)号：JPS60121284A
公开(公告)日：1985-06-28
申请号：JP23041183
申请日：1983-12-06
申请人： KAO CORP , NIPPON KOKAN KK
发明人： KAWANO MITSUGI , JIROUMARU KAZUMI , NISHIMURA HIROSHI , YAMANE KOUICHI , KITA KAZUO
IPC分类号： C23G1/14 , C21D1/68 , C21D1/70 , C25F1/00
摘要： PURPOSE:To prevent the sticking of steel plates to each other by treating previously the plate with a detergent contg. an alkaline base material, a surfactant, and a specified organic compd. in box-annealing a tight coil of cold rolled steel plate. CONSTITUTION:When a tight coil of cold rolled steel plates is box-annealed, the coil is treated by the detergent composition to prevent the sticking by baking, etc. of contacting steel plates to each other and the decrease in yield of the product. Said detergent composition contains 60-90% mixture of sodium orthosilicate and caustic soda in 1-0.3 ratio of Na2O/SiO2 as an alkaline base material, 0.5-5% surfactant added with 9mol nonylphenolethylene oxide, and 0.1-10% >=1 kind among Na salt of condensate of naphthalene sulfonate and formalin expressed by formula ( I ), alkali metal salt of 2-acrylamidoethane sulfonate expressed by formula (II), and sodium polysulfide expressed by formula (III).

19. 发明专利

JPH11343560A PRODUCTION OF HOT DIP ALUMINUM-ZINC ALLOY PLATED STEEL SHEET EXCELLENT IN CRACK RESISTANCE AND CORROSION-RESISTANCE 失效
公开(公告)号：JPH11343560A
公开(公告)日：1999-12-14
申请号：JP16618998
申请日：1998-05-30
申请人： NIPPON KOKAN KK
发明人： INAGAKI JUNICHI , OI TOSHIHIKO , YAMAJI TAKAFUMI , YOSHIDA YASUHIDE , YAMASHITA MASAAKI , JIROUMARU KAZUMI , OKUMA TOSHIYUKI , ISHIDA NOBUYUKI
IPC分类号： C23C2/06 , C23C2/12 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To stably produce a hot dip Al-Zn alloy plated steel sheet excellent in crack resistance and corrosion resistance without increasing the producing stage and adding special elements into a plating bath. SOLUTION: In the method for producing a hot dip Al-Zn alloy plated steel sheet in which, in continuous-type hot dip plating equipment, a steel sheet is annealed and is successively applied to hot dip plating in a hot dip Al-Zn plating bath contg. 20 to 95 wt.% Al, a steel sheet having surface roughness Ra (μm) satisfying the inequality of [(100+80CW) -10]/40>=Ra in accordance with the coating weight CW (g/m ) per side of the plated steel sheet to be produced is used as an original sheet, and the hot dip plating of 10 to 45 g/m coating weight per side is applied. The plated steel sheet obtd. by this producing method has excellent crack resistance because of the reduced coating and moreover it has excellent corrosion resistance since the generation of spotlike rust in the pat subjected to severe working is suppressed.

20. 发明专利

JPH11343552A HOT DIP ALUMINUM-ZINC ALLOY PLATED STEEL SHEET EXCELLENT IN CORROSION RESISTANCE 失效
公开(公告)号：JPH11343552A
公开(公告)日：1999-12-14
申请号：JP16415198
申请日：1998-05-28
申请人： NIPPON KOKAN KK
发明人： OI TOSHIHIKO , INAGAKI JUNICHI , YAMASHITA MASAAKI , ISHIDA NOBUYUKI , JIROUMARU KAZUMI , OKUMA TOSHIYUKI
IPC分类号： C23C22/30 , C23C2/06 , C23C2/12 , C23C28/00
摘要： PROBLEM TO BE SOLVED: To provide a hot dip Al-Zn alloy plated steel sheet capable of stably containing excellent corrosion resistance. SOLUTION: In this hot dip Al-Zn alloy plated steel sheet containing 20 to 95 wt.% Al in a plating film, the ratio d/i of Al conc. (d) in the dendrite parts to that (i) in the inter-dendrite parts in the plated film is 1.5. Preferably, the coating weight of the plated film is regulated to >=45 g/m per one side.

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