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1. 发明专利

JPH0143007B2 失效
公开(公告)号：JPH0143007B2
公开(公告)日：1989-09-18
申请号：JP19240581
申请日：1981-11-30
申请人： NIPPON KOKAN KK
发明人： TAIRA TADAAKI , TSUKADA KOSHIRO , SHIMODA TATSUYA , TAKEHARA JUNICHIRO , UME KAZUYOSHI , ICHINOSE HIROYUKI
IPC分类号： C22C38/00 , C21D8/02 , C21D8/10 , C21D9/08 , C22C38/16

2. 发明专利

JPS5893815A PRODUCTION OF HIGH TENSILE STEEL PIPE 失效
公开(公告)号：JPS5893815A
公开(公告)日：1983-06-03
申请号：JP19240581
申请日：1981-11-30
申请人： NIPPON KOKAN KK
发明人： TAIRA TADAAKI , TSUKADA KOUSHIROU , SHIMODA TATSUYA , TAKEHARA JIYUNICHIROU , UME KAZUYOSHI , ICHINOSE HIROYUKI
IPC分类号： C22C38/00 , C21D8/02 , C21D8/10 , C21D9/08 , C22C38/16
摘要： PURPOSE:To produce a high tensile steel pipe having excellent weldability and having, for example, >=30mm. thickness and 65kg/mm. tensile strength by rolling the steel which is decreased of equiv. of C relatively and is increased of content of Cu then cooling the same acceleratively according to need to make a steel plate, and subjecting the steel plate to a tempering treatment under specific parameters after making the same into a pipe. CONSTITUTION:The steel contg., by weight, =1 kind among =30% cumulative draft at temp. lower than the unrecrystallization temp. and 650-750 deg.C finish rolling temp. After the resultant steel plate is made into a pipe, the pipe is subjected to a tempering treatment at and for the temp. and time within the 14.7X10 -17.2X10 range of a tempering parameter P=T(logt +20) (T: temp. deg.C, t: time hr), whereby the intended high tensile steel is obtd.

3. 发明专利

JP2828054B2 失效
公开(公告)号：JP2828054B2
公开(公告)日：1998-11-25
申请号：JP21558996
申请日：1996-08-15
申请人： NIPPON KOKAN KK
发明人： SHIKAUCHI NOBUO , KURIHARA MASAYOSHI , SANPEI TETSUYA , SHIMODA TATSUYA
IPC分类号： C22C38/00 , C22C38/14 , C22C38/50 , C22C38/58

4. 发明专利

JPS62240719A HEAT TREATMENT FOR HOT STEEL SHEET 失效
公开(公告)号：JPS62240719A
公开(公告)日：1987-10-21
申请号：JP8233886
申请日：1986-04-11
申请人： NIPPON KOKAN KK
发明人： WATANABE KAORU , SHIMODA TATSUYA , USUI SUEO , TAKIGAWA NOBUTAKA , OKI TERUHISA
IPC分类号： C21D9/52 , C21D9/573
摘要： PURPOSE:To satisfactorily heat treat a hot steel sheet by gradually increasing the speed of conveyance of the steel sheet during passing through a cooling zone so as to uniformly cool the steel sheet over the whole region from the top to the bottom. CONSTITUTION:When a hot steel sheet 1 leaving a rolling mill 2 is heat treated by passing through a cooling zone 3 at a constant speed of conveyance, the cooling start temp. and the cooling stop temp. of the steel sheet 1 are higher at the top 1a of the steel sheet 1 and lower at the bottom 1b, respectively. In order to prevent the ununiform cooling, the speed of conveyance of the steel sheet 1 is gradually increased at the time when the top 1a leaves the cooling zone 3. By this cooling method, the cooling start temp. and the cooling stop temp. of the steel sheet 1 can be uniformized over the whole region from the top 1a to the bottom 1b.

5. 发明专利

JP2001131780A STEEL MATERIAL SUBJECTED TO RUST STABILIZATION TREATMENT 失效
公开(公告)号：JP2001131780A
公开(公告)日：2001-05-15
申请号：JP31327299
申请日：1999-11-04
申请人： NIPPON KOKAN KK
发明人： MORITA KENJI , SATO KAORU , MIYATA SHIRO , TAKEMURA AKIHIRO , SHIMODA TATSUYA
IPC分类号： C23F15/00
摘要： PROBLEM TO BE SOLVED: To provide a steel material subjected to rust stabilization treatment, in which stabilized rust inherent in a weather-resistant steel material is efficiently formed and also, any defective appearance due to flowable rust or the like in a stabilized rust formation process is not caused and further, when stabilized rust is formed under a treating agent coating film of the treated steel material, any appearance deterioration due to bulging or peeling of an organic resin coating layer is not caused. SOLUTION: This treated steel material is provided on its base material with a coating film lower layer that is an iron compound coating film layer having a

6. 发明专利

JPH07233436A HIGH TENSILE STRENGTH STEEL AND ITS PRODUCTION 失效
公开(公告)号：JPH07233436A
公开(公告)日：1995-09-05
申请号：JP32624794
申请日：1994-12-27
申请人： NIPPON KOKAN KK
发明人： MORIYA YUTAKA , KAWANAKA TORU , TSUKADA KOSHIRO , SHIMODA TATSUYA , TANI SABURO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/48
摘要： PURPOSE:To produce a high tensile strength steel excellent in weldability and acoustic anisotropy by preparing a high tensile strength steel in which the componental compsn. is specified and the welding cracking sensitivity index and carbon equivalent value are prescribed. CONSTITUTION:A high tensile strength steel having a compsn. contg., by weight, 0.075 to 0.094% C, 0.01 to 0.4% Si, 0.5 to 1.5% Mn, =0.45, and the balance iron with inevitable impurities and substantially contg. no B is prepd. Thus, the 780N/mm class high tensile strength steel excellent in weldability and acoustic anisotropy can be obtd.

7. 发明专利

JPH07197123A PRODUCTION OF FIRE-PROOF STEEL MATERIAL FOR BUILDING 失效
公开(公告)号：JPH07197123A
公开(公告)日：1995-08-01
申请号：JP34965293
申请日：1993-12-29
申请人： NIPPON KOKAN KK
发明人： MORIYA YUTAKA , KURIHARA MASAYOSHI , HATAKEYAMA KOTARO , SHIMODA TATSUYA
IPC分类号： C21D8/00 , C22C38/00 , C22C38/12
摘要： PURPOSE:To provide a producing method of a fire-proof steel material for building, by which the optimum producing condition related to the various component system and plate thickness can be clear, at the time of producing the fire-proof steel material having a prescribed strength. CONSTITUTION:At the time of heating the steel satisfying 0.5% =550 deg.C at 1-50 deg.C/sec cooling rate to produce the fire-proof steel material for building having the tensile strength at the room temp. in the range of 490-720N/mm . The equation: Ts=400XlogK. Wherein, Ts: cooling start temp. ( deg.C), K=t/(Mo+V+Ceq), t: plate thickness of the finished product (mm). By this method, the fire proof steel material having excellent weldability is obtd.

8. 发明专利

JPS6326181B2 失效
公开(公告)号：JPS6326181B2
公开(公告)日：1988-05-28
申请号：JP24816784
申请日：1984-11-26
申请人： NIPPON KOKAN KK
发明人： KAMIO HIROSHI , UENO YASUSHI , NOGUCHI TAKAO , SHIMODA TATSUYA
IPC分类号： C21D1/00 , B21B45/02 , C21D9/52 , C21D9/573

9. 发明专利

JPS61127824A Device for cooling lower surface of heated steel plate 失效
标题翻译：用于冷却加热钢板的下表面的装置
公开(公告)号：JPS61127824A
公开(公告)日：1986-06-16
申请号：JP24816784
申请日：1984-11-26
申请人： Nippon Kokan Kk
发明人： KAMIO HIROSHI , UENO YASUSHI , NOGUCHI TAKAO , SHIMODA TATSUYA
IPC分类号： C21D1/00 , B21B45/02 , C21D9/52 , C21D9/573
CPC分类号： C21D9/573
摘要： PURPOSE:To uniformly and efficiently cool the lower surface of a heated steel plate by means of a jet of cooling water, by providing a water tank, in which a slit nozzle is positioned below the water level, below the horizontal heated steel plate and specifying the distances between the steel plate and water level and between the nozzle and water level. CONSTITUTION:A water tank 11 is provided below a horizontally lying heated steel plate 1 and the tank 11 is filled with cooling water. The water tank 11 is equipped with a slit nozzle 12 which is vertically provided through the bottom wall of the tank 11 and elongated in the width direction of the steel plate 1 and the nozzle 12 is provided, the distance H between the upper end of the slit nozzle 12 and water level and the distance B between the lower surface of the steel plate 1 and water level are respectively specified to ranges 50-150mm and
摘要翻译：目的：为了通过冷却水射流对加热钢板的下表面进行均匀有效的冷却，通过在水平加热钢板的下面设置狭缝喷嘴位于水位以下的水箱，并指定钢板与水位之间以及喷嘴与水位之间的距离。构成：水槽11设置在水平放置的加热钢板1的下方，并且罐11充满冷却水。水箱11配备有狭缝喷嘴12，其通过罐11的底壁垂直设置，并且在钢板1的宽度方向上延伸，并且设置有喷嘴12，狭缝喷嘴12和水位以及钢板1的下表面和水位之间的距离B分别被规定为50-150mm和<= 100mm的范围。在这种状态下，通过从喷嘴集管13向狭缝喷嘴12供给冷却水来冷却加热钢板1，并与罐11内的冷却水一起形成水射流14.因此，加热钢板的下表面 1均匀冷却。

10. 发明专利

JPH0913145A BUILDING FIRE RESISTANT STEEL 失效
公开(公告)号：JPH0913145A
公开(公告)日：1997-01-14
申请号：JP21558996
申请日：1996-08-15
申请人： NIPPON KOKAN KK
发明人： SHIKAUCHI NOBUO , KURIHARA MASAYOSHI , SANPEI TETSUYA , SHIMODA TATSUYA
IPC分类号： C22C38/00 , C22C38/14 , C22C38/50 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To produce a fire resistant steel for structural purpose holding high strength at a high temp. and having high weldability and high ductility and toughness at a low cost. SOLUTION: This building fire resistant steel excellent in weldability and ductility and toughnes is composed of a hot rolled steel having a compsn. contg., by weight, 0.05 to 0.20 to 0.15 to

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