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1. 发明专利

CA2030812A1 HIGH CORROSION RESISTANT MULTI-LAYER COATED STEEL SHEETS HAVING EXCELLENT PAINTABILITY BY ENABLING THE PREVENTION OF OCCURRENCE OF BUBBLE-LIKE ED PAINT DEFECTS, AND PRODUCING METHOD THEREOF 未知
公开(公告)号：CA2030812A1
公开(公告)日：1990-10-08
申请号：CA2030812
申请日：1990-04-06
申请人： NIPPON KOKAN KK , TOYOTA MOTOR CO LTD
发明人： MIWA HIROSHI , SAGIYAMA MASARU , SHOJI MASAHIRO , OSAKI YASUNORI , KURATA MASAYUKI , FUKADA ARATA , BESSHO TAKESHI
IPC分类号： C23C2/28 , C23C28/02 , C25D5/10 , C25D5/50 , B32B15/01 , C25D5/26
摘要： The present invention relates to high corrosion resistant multi-layer coated steel sheets having excellent paintability, as corrosion resistant steel sheets especially suitable to automobiles, and relates to a producing method thereof. The inventive steel sheet is a multi-layer coated steel plate having, on the surface thereof, a coated film based on Zn or Zn alloys of coating weight being not less than 25 g/m2 including at least coatings based on Zn alloys or composite coatings based on Zn or Zn alloys, and on said coated film, a coated film based on Fe' or Fe alloys of coating weight being 1 to 10 g/m' including at least Fe coating or the coatings based on Fe alloys of not less than 50% Fe, and wherein a hydrogen absorption amount in total in the coated film and in the steel is limited to be not more than 300 m /m2 (per one surface). Such a multi-layer coated steel plates has excellent paintability because they can prevent the generation of craters during electropainting and the occurrence of bubble-like paint defects concurrently, and have also corrosion resistance of high degree. Further a producing method of the present invention forms said multi-layer coatings on the steel sheets | and carries out heating-treatment of the multi-layer coated steel sheets at a temperature of 100 to 400.degree.C so as to produce the coated steel sheets of the above mentioned properties.

2. 发明专利

NL186774B 未知
公开(公告)号：NL186774B
公开(公告)日：1990-09-17
申请号：NL8004729
申请日：1980-08-21
申请人： NIPPON KOKAN KK
发明人： SUDA TOYOHARU , YAMANA HIDEO , TAYAMA KATSUHIKO , ARAKI KENJI , KURATA MASAYUKI
IPC分类号： C21D3/04 , C21D8/02 , C21D9/00 , C21D9/46 , C22C38/00 , C22C38/06 , H01J9/14 , H01J29/07

3. 发明专利

NL186774C 未知
公开(公告)号：NL186774C
公开(公告)日：1991-02-18
申请号：NL8004729
申请日：1980-08-21
申请人： NIPPON KOKAN KK
发明人： SUDA TOYOHARU , YAMANA HIDEO , TAYAMA KATSUHIKO , ARAKI KENJI , KURATA MASAYUKI
IPC分类号： C21D3/04 , C21D8/02 , C21D9/00 , C21D9/46 , C22C38/00 , C22C38/06 , H01J9/14 , H01J29/07

4. 发明专利

DE3031762A1 未知
公开(公告)号：DE3031762A1
公开(公告)日：1981-03-12
申请号：DE3031762
申请日：1980-08-22
申请人： NIPPON KOKAN KK , NIPPON MINING CO
发明人： SUDA TOYOHARU , TAYAMA KATSUHIKO , ARAKI KENJI , KURATA MASAYUKI , YAMANA HIDEO
IPC分类号： C21D3/04 , C21D8/02 , C21D9/00 , C21D9/46 , C22C38/00 , C22C38/06 , H01J9/14 , H01J29/07 , C21D8/04

5. 发明专利

DE3009524A1 未知
公开(公告)号：DE3009524A1
公开(公告)日：1980-09-25
申请号：DE3009524
申请日：1980-03-12
申请人： TOYOTA MOTOR CO LTD , AKEBONO BRAKE IND
发明人： OKA HIROYUKI , WATANABE SHINGO , TOYOTA AICHI , WATANABE YUSYO , KURATA MASAYUKI , KUKI SAITAMA
IPC分类号： F16D55/224 , F16D55/227 , F16D65/00
摘要： In a pin-slide type disc brake, the caliper of the disc brake is prevented from dropping or turning on a slide pin due to its own weight during replacement of the friction pads of the disc brake by providing a fitting hole in a part of a support straddling the disc in the radial direction of the disc and in the vicinity of a caliper guide mechanism located on the upper side of the support. A rigid rod is fitted into the hole and arranged to have, for example, the inner wall of the disc straddling portion of the caliper come to engage it to thus prevent the caliper from dropping when it is turned about the slide pin.

6. 发明专利

JPH11131149A CONTINUOUS PROCESSING FURNACE OF STEEL STRIP 失效
公开(公告)号：JPH11131149A
公开(公告)日：1999-05-18
申请号：JP31643397
申请日：1997-10-31
申请人： NIPPON KOKAN KK
发明人： KASAI KATSUJI , KURATA MASAYUKI , WAKASA HIROSHI , OKADA KAZUHISA , MIWA TORU
IPC分类号： C23C10/00 , C21D9/52 , C21D9/56
摘要： PROBLEM TO BE SOLVED: To prevent the carburization of a steel strip in bringing the steel strip during passing through in a furnace into contact with a carbon base refractory, in the continuous treating furnace using carbon base refractory to at least a part of a member in the furnace. SOLUTION: In the continuous treating furnace for executing heat treatment or desiliconize-treatment to the steel strip at high temp. and using the carbon base refractory to at least a part of the structural member in the furnace, a coating layer containing one or two kinds selected from Si3 N4 and SiO2 is formed on the surface of the carbon base refractory stationarily or non- stationarily contacting with the steel strip during passing through in the furnace.

7. 发明专利

JPH0361396A PRODUCTION OF DOUBLE-LAYER PLATED STEEL SHEET EXCELLENT IN ELECTRODEPOSITION COATING PROPERTY CAPABLE OF PREVENTING GENERATION OF BUBBLY DEFECT IN ELECTRODEPOSITION COATING FILM 失效
公开(公告)号：JPH0361396A
公开(公告)日：1991-03-18
申请号：JP19252789
申请日：1989-07-27
申请人： NIPPON KOKAN KK , TOYOTA MOTOR CORP
发明人： SAGIYAMA MASARU , OSAKI YASUNORI , KURATA MASAYUKI , FUKADA ARATA , BESSHO TAKESHI
IPC分类号： C25D3/20 , C21D1/00 , C25D5/26 , C25D5/50 , C25D13/20
摘要： PURPOSE:To produce a double-layered plated steel sheet excellent in electrodeposition coating property by successively forming a zinc-based plating film and an Fe-based plating film on the surface of a steel sheet respectively in a specified amt. and then heat-treating the steel sheet at a specified temp. CONSTITUTION:A single or double-layered plating film consisting of a Zn-based alloy plating and/or one or >=2 kinds of Zn-based composite platings or a double-layered plating film consisting of a Zn-based alloy plating and/or one or >=2 kinds of Zn-based composite platings and a Zn plating is formed on the surface of a steel sheet in the amt. of >=25g/m . An Fe plating and/or an Fe-based plating film consisting of one or >=2 kinds of Fe-based alloy platings contg. >=50% Fe are formed on the Zn-based plating film in the amt. of 1-10g/m . The double-layered plated steel sheet is heat-treated at 100-400 deg.C for >=1sec. Consequently, a rust-preventive steel sheet appropriate for the automobile is obtained.

8. 发明专利

JPH11179422A METHOD FOR CONTROLLING SHAPE OF THIN STEEL STRIP 失效
公开(公告)号：JPH11179422A
公开(公告)日：1999-07-06
申请号：JP35296597
申请日：1997-12-22
申请人： NIPPON KOKAN KK
发明人： MURATA SAIICHI , KURATA MASAYUKI , WAKASA HIROSHI , OZAKI DAISUKE
IPC分类号： B21C47/02 , B21C47/26 , B21C47/28
摘要： PROBLEM TO BE SOLVED: To easily and surely prevent generation of defective shape such as center buckle and edge wave by specifying a working amount on a thin steel strip using a recessed or projecting crown spool with a spool fitted in a tension reel in winding a rolled thin steel strip by a tension reel. SOLUTION: A working amount of a thin steel strip by a recessed crown spool satisfies a formula I, and a working amount of a thin steel strip by a projecting crown spool satisfies a formula II. In the formulas: a is thickness difference between a thinest part at a center part in the axial direction and a thickest part at an end part in the axial direction of the recessed crown spool, b is thickness difference between a thickest part at a center part in the axial direction and a thinest part at an end part in the axial direction of the projecting crown spool, R is outer diameter of spool, n is number of winding of the thin steel strip, to is thickness of the thin steel strip at a center part in the width direction. c is crown ratio expressed by (to -te )/to (provided that te is thickness of the thin steel strip at the end in the width direction), σy is yield stress of the thin steel strip, F is winding tensile force of the thin steel strip, E is Young's modulus of the thin steel strip.

9. 发明专利

JPH10317166A METHOD FOR REMOVING OXIDIZING LAYER ON SURFACE OF FE-NI SERIES ALLOY SHEET 失效
公开(公告)号：JPH10317166A
公开(公告)日：1998-12-02
申请号：JP6887898
申请日：1998-03-18
申请人： NIPPON KOKAN KK
发明人： ARIGA TAMAKO , KAGE ISAMU , SHOMURA KATSUMI , KURATA MASAYUKI , WAKASA HIROSHI
IPC分类号： C23G1/08 , C23F1/00 , C23F1/28 , H01J9/14
摘要： PROBLEM TO BE SOLVED: To provide a removing method efficiently removing an oxidizing layer on the surface of an Fe-Ni series alloy hot rolled sheet and small in the loss of a base metal alloy. SOLUTION: An Fe-Ni series alloy sheet is subjected to immersing treatment with a mixed aq. soln. of 3 to 12 wt.% hydrochloric acid and 20 to 35 wt.% ferric chloride or is subjected to immersing treatment with an aq. soln. of 3 to 12 wt.% hydrochloric acid and is successively subjected to immersing treatment with an aq. soln. of 20 to 35 wt.% ferric chloride. In the above treatment, the concn. of hydrochloric acid is regulated to 5 to 10 wt.%, and the concn. of ferric chloride is regulated to 25 to 30 wt.%. Or, furthermore, the temp. of the aq. soln. is regulated to 60 to 80 deg.C or the relative flow rate of the aq. soln. to the plane is regulated to 20 to 60 mpm. By using hydrochloric acid and ferric chloride having the above concns., an oxidizing layer on the surface of the Fe-Ni series alloy hot rolled sheet can be removed in a short time, and the loss of the base metal alloy can be reduced. It is preferable that the temp. is regulated to 60 to 80 deg.C or the relative flow rate is regulated to 20 to 60 mpm from the viewpoint of the efficiency of descaling.

10. 发明专利

JPH10212566A MANUFACTURE AND MANUFACTURING EQUIPMENT OF HIGH SILICON STEEL STRIP EXCELLENT IN FLATNESS 失效
公开(公告)号：JPH10212566A
公开(公告)日：1998-08-11
申请号：JP3109397
申请日：1997-01-30
申请人： NIPPON KOKAN KK
发明人： KASAI KATSUJI , KURATA MASAYUKI , WAKASA HIROSHI , OKADA KAZUHISA , HIRATANI TATSUHIKO
IPC分类号： C23C10/06
摘要： PROBLEM TO BE SOLVED: To continuously manufacture the high silicon steel strip by the gaseous siliconizing method without generating the warp in the longitudinal direction of the steel strip. SOLUTION: In a method for continuously manufacture the high silicon steel strip where the steel strip is siliconized by spraying the treatment gas on each side of the continuous steel strip, and the diffusion heat treatment is performed in which Si penetrated in surface layer of the steel strip is diffused in the thickness direction, the C-warp of the steel strip is caused by the unbalance of the silicon penetration quantity in the back side of the steel strip, and it is found that generation of the C warp can be effectively suppressed by suppressing the unbalance of the silicon penetration quantity, and at least one of the flow rate and the temperature of the treatment gas to be sprayed against each side of the steel strip, and the concentration of the silicon chloride gas is controlled so that the Si addition to the steel strip through the siliconizing treatment is approximately uniform on each side of the steel strip.

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