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1. 发明专利

JPS6332539B2 失效
公开(公告)号：JPS6332539B2
公开(公告)日：1988-06-30
申请号：JP20881
申请日：1981-01-05
申请人： NIPPON STEEL CORP
发明人： WAKITA JUNICHI , KATSUYAMA NORIO , YOSHIDA MOTOKI
IPC分类号： B22D11/10 , B22D11/11 , B22D11/112 , B22D11/113 , B22D11/116 , B22D11/117 , B22D11/118

2. 发明专利

JPS6253260B2 失效
公开(公告)号：JPS6253260B2
公开(公告)日：1987-11-10
申请号：JP9946079
申请日：1979-08-06
申请人： NIPPON STEEL CORP
发明人： KATSUYAMA NORIO , WAKITA JUNICHI , YOSHIDA MOTOKI , KURIBAYASHI HIDEO , GOTO TADAO , YAMAZOE KEIICHI
IPC分类号： B22D1/00 , B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , B22D11/118 , B22D41/50

3. 发明专利

JPS5816026A PRODUCTION OF GOOD WORKABLE STEEL MATERIAL 失效
公开(公告)号：JPS5816026A
公开(公告)日：1983-01-29
申请号：JP11497381
申请日：1981-07-22
申请人： NIPPON STEEL CORP
发明人： HAYANO SHIGERU , EZAKA KAZUAKI , KATSUYAMA NORIO , NAKAMURA TAKAAKI
IPC分类号： C22C38/00 , C21D7/13 , C21D8/02
摘要： PURPOSE:To produce good workable steel which prevents flange cracking by subjecting a slab made of steel contg. specific contents of c, Mn, Al to heating and extracting at specific temp. then to hot rolling. CONSTITUTION:This relates to production of steel materials for cans wherein a slab made of the steel contg. at least

4. 发明专利

JPS5638449A HOT ROLLED STEEL PLATE OBTAINED BY CONTINUOUS CAST SLAB 失效
公开(公告)号：JPS5638449A
公开(公告)日：1981-04-13
申请号：JP11241379
申请日：1979-09-04
申请人： NIPPON STEEL CORP
发明人： EZAKA KAZUAKI , KATSUYAMA NORIO
IPC分类号： B21B3/00 , B22D11/00 , C21D9/46 , C22C38/00 , C22C38/14
摘要： PURPOSE:To provide the titled hot rolled steel plate exhibiting total elongation of 2.0% or more at cold roll under high pressure and not producing cold roll breakage by a method wherein each specific amount of C, Mn, P, and S is contained, and a small amount of Ti is added to precipitate TiN, or Al is added to precipitate AlN. CONSTITUTION:The above hot rolled steel plate includes: C: 0.03 to 0.10%, Mn: 0.05-0.5%, P: 0.03% or less, S: 0.03% or less, T.N: 50ppm or less, and TiN: 0.01% or less, and the remaining Fe, whrerby T.N. (Total N) is contained in amount expressed by the formula. Hot rolled steel plates given by continuous slabs of this composition are sure to provide total elongation of more than 2.0% at cold rolling under high pressure. Thus, if properly cold rolled, this eliminates cold roll breakage due to boring at cold roll operation. Furthermore, if the material is formed into an extremely thin plate for galvanization, this eliminates flange cracks due to insufficient elongation at can production.

5. 发明专利

JPS566706A HOT WIDTHHGAUGE CONTROL ROLLING METHOD FOR STEEL BILLET 失效
公开(公告)号：JPS566706A
公开(公告)日：1981-01-23
申请号：JP8148179
申请日：1979-06-29
申请人： NIPPON STEEL CORP
发明人： KATSUYAMA NORIO , EZAKA KAZUAKI , YANAI TOSHIO , SUZUKI KENICHI
IPC分类号： B21B1/02 , B21B1/00 , B21B13/06
摘要： PURPOSE:To make the high rate rolling possible to prevent the generation of defects like as flaws, etc., when the hot rolling pass for the hot steel billet is carried out by the vertical rolls provided with upper and lower flanges, by specifying the outward widening gradient of upper and lower flanges and their root curvature. CONSTITUTION:The vertical rolls 1 provided with upper and lower flanges are used in carrying out the hot width-gause control rolling for the hot steel billet; hereupon, these rolls' properties are specified as follows for carrying out the width reducing rolling at a rate >=50mm./one pass. The vertical roll 1 for above stated rolling is specified as follows; the outward widening gradient theta (=b/a) of upper and lower flanges against the roll axis 3 is 0.25-0.4, and the curvature R1 at the flange root is >=40mm.. If desired, the jutting length L of upper and lower flanges is specified to 100-180mm., and the corner curvature R2 at the inside of the tip of upper and lower flanges is specified to 20mm.; hereby, the generation of flaws can be more effectively restricted.

6. 发明专利

JPH0549725B2 失效
公开(公告)号：JPH0549725B2
公开(公告)日：1993-07-27
申请号：JP13467282
申请日：1982-08-03
申请人： NIPPON STEEL CORP
发明人： EZAKA KAZUAKI , NAKAMURA TAKAAKI , KATSUYAMA NORIO
IPC分类号： C21D8/00 , C21D8/02

7. 发明专利

JPS56128648A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPS56128648A
公开(公告)日：1981-10-08
申请号：JP3291980
申请日：1980-03-15
申请人： NIPPON STEEL CORP
发明人： KOMIYA TOSHIAKI , YOSHIDA MOTOKI , KATSUYAMA NORIO , WAKITA JIYUNICHI
IPC分类号： B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116 , B22D11/117 , B22D11/118
摘要： PURPOSE:To effectively float contained inclusions by placing an intermediate ladle provided with a lower weir and an upper weir successively between a ladle and a mold and horizontally moving the rectified laminar flow after the passage of the upper gate for more than a specified length at lower than a specific speed then pouring the same into the mold at the time of pouring the molten steel from the ladle to the mold. CONSTITUTION:When a lower weir 4 and an upper weir 5 are provided successively to an intermediate ladle 1, the bottom flow A formed by the pouring flow of molten steel is shut off and turns to ascending flow B. Stirring motion is formed by this ascending flow B and the coalescence of the inclusions contd. in the molten steel is accelerated and are floated up by increasing buoyancy, until they are adsorbed on a slag layer 7. While the molten steel passes this upper weir 5 and reaches a pouring port 3, the residual inclusions assume the rectified layer E in which they are easy to float. However, the effect thereof is guaranteed by securing more than 600mm. distance of the rectified laminar flow E at a /sec)/the average sectional area (cm ) of the intermediate ladle at a minimum molten steel level.

8. 发明专利

JP2001049454A PHOSPHATE TREATED GALVANIZED STEEL SHEET EXCELLENT IN WORKABILITY AND ITS PRODUCTION 失效
公开(公告)号：JP2001049454A
公开(公告)日：2001-02-20
申请号：JP23103999
申请日：1999-08-18
申请人： NIPPON STEEL CORP
发明人： ISHIZUKA KIYOKAZU , NIIGASHIRA HIDETOSHI , YAMADA TERUAKI , KIKUCHI IKUO , KAWAI KENJI , KATSUYAMA NORIO
IPC分类号： C23C22/17 , C23C22/07 , C23C22/83
摘要： PROBLEM TO BE SOLVED: To provide a phosphate treated galvanized steel sheet which is excellent in workability and is used for automobiles, house appliances, building materials or the like. SOLUTION: This is a galvanized steel sheet whose surface is provided with a phosphate film, and, in the phosphate film, polyolefin wax or modified polyolefin wax is contained. Moreover, as to the method for producing the phosphate treated galvanized steel sheet, the surface of a galvanized steel sheet is subjected to phosphate treatment is thereafter coated with an aq. soln. contg. polyolefin wax or modified polyolefin wax, phosphoric ions and polyvalent metal ions and is dried.

9. 发明专利

JPS648048B2 失效
公开(公告)号：JPS648048B2
公开(公告)日：1989-02-13
申请号：JP16920984
申请日：1984-08-15
申请人： NIPPON STEEL CORP
发明人： SHIRAI HIROYUKI , KONNO TAKAHARU , KATSUYAMA NORIO , MATSUMOTO MASATAKE , YONESONO SHIRO , HOSHINO TAKEHIRO , TOYODA KAZUOMI
IPC分类号： C21D8/02 , C22C38/00 , C22C38/06

10. 发明专利

JPS57115949A PRODUCTION OF CLEAN STEEL IN CONTINUOUS CASTING 失效
公开(公告)号：JPS57115949A
公开(公告)日：1982-07-19
申请号：JP20881
申请日：1981-01-05
申请人： NIPPON STEEL CORP
发明人： WAKITA JIYUNICHI , KATSUYAMA NORIO , YOSHIDA MOTOKI
IPC分类号： B22D11/10 , B22D11/11 , B22D11/112 , B22D11/113 , B22D11/116 , B22D11/117 , B22D11/118
摘要： PURPOSE:To remove many inclusions both at the steady time and at the exchanging of ladles and to improve yields by maintaining the depth of the molten steel in a tundish at the limit value at which the inclusions float or above during continuous casting. CONSTITUTION:In continuous casting, the molten steel S in a ladle 21 is agitated and oscillated at the 10-300mmHg degrees of vaccum for the time t1 determined by the equation II (where, V: the volume of molten steel ton, F: the rate of reflux ton/min, (a): the constant determined by the intended degree of cleanliness), whereby the inclusions therein are reduced. This molten steel is supplied to a tundish 20. At this time, the depth of the molten steel S in the tundish 20 is maintained at the limit value Ls of the equationIdetermined beforehand in accordance with casting speed Vc and the grain sizes of the inclusions to be expelled or above (where Vc: ton/min) at all times at charging ports 281, 282, whereby the many inclusions are removed.

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