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1. 发明专利

JPH09272951A SHAPE STEEL EXCELLENT IN COATING ADHESION AND ITS PRODUCTION 失效
公开(公告)号：JPH09272951A
公开(公告)日：1997-10-21
申请号：JP8560696
申请日：1996-04-08
申请人： NIPPON STEEL CORP
发明人： WAKE MAKOTO , KUROKAWA MASAO , YAMAMOTO KOICHI , ONODERA NORIAKI
IPC分类号： B21B45/00 , B21B1/08 , B21B1/088 , B21B45/08 , C21D8/00 , C21D9/00 , C22C38/00 , C22C38/12
摘要： PROBLEM TO BE SOLVED: To produce a shape steel with a relatively thin tight scale having specified surface roughness by incorporating it with a somewhat large amt. of Si and a suitable amt. of Mo, regulating the contents,of Al and S and specifying the conditions of heating, hot rolling, descaling before and after finish rolling, regulation of surface roughness and the subsequent cooling. SOLUTION: A slab contg., by weight, 0.03 to 0.22% C, 0.1 to 0.5% Si, 0.2 to 1.6% Mn, =25kg/cm bombarding pressure so as to regulate the number of the bombarding within 5sec to the same place on the surface of the shape steel to >= two times to execute descaling, which is subjected to hot finish rolling at 700 to 1000 deg.C at a draft of

2. 发明专利

JPH07238318A PRODUCTION OF SHAPE STEEL EXCELLENT IN STRENGTH, TOUGHNESS, AND WELDABILITY AND HAVING FLANGE 失效
公开(公告)号：JPH07238318A
公开(公告)日：1995-09-12
申请号：JP2848994
申请日：1994-02-25
申请人： NIPPON STEEL CORP
发明人： YOSHIDA TAKU , YAMAMOTO KOICHI , KUROKAWA MASAO , EDA KAZUHIKO , ONODERA NORIAKI
IPC分类号： C21D8/00 , C22C38/00 , C22C38/14
摘要： PURPOSE:To produce a shape steel, excellent in strength, toughness, and weldability and having a flange, by subjecting a continuously cast bloom of a preliminarily deoxidized molten steel containing specific amounts of Ti to hot rolling and finish rolling under respectively specified temp. conditions. CONSTITUTION:Preliminarily deoxidized molten steel, containing 0.03-0.015 O2 and 0.005-0.025% Ti, is further deoxidized with Al or Fe-Al, by which a molten steel which has a composition having 0.005-0.015% remaining Al content and satisfying a relation -0.004

3. 发明专利

JPH05285522A 失效
公开(公告)号：JPH05285522A
公开(公告)日：1993-11-02
申请号：JP11990492
申请日：1992-04-15
申请人： NIPPON STEEL CORP
发明人： KUROKAWA MASAO , HIROGUCHI TAKATOSHI , TERAURA KAZUHIRO
IPC分类号： B21B45/02 , C21D9/00
摘要： PURPOSE:To prevent cooling water from flowing out of the longitudinal direction of an H-beam and to improve the precision of cooling control in a cooling zone when the upper surface of a web and the inner surfaces of right and left upper flanges of the hot rolled H-beam are cooled. CONSTITUTION:Air guide pieces are connected with the right, left and lower parts of an air blast block body 2 and an air supplying tube is connected with its back, an air passage forming block 3 is mounted facing the front of this air blast block body 2 and a pair of water stop weirs 1 provided with an air jet slit 4 between both blocks are mounted on the inlet and outlet sides of the cooling zone. The air is jetted compactly and uniformly from the entire periphery of the slit and water stop effect is very high.

4. 发明专利

JPS645601A METHOD FOR ROLLING SHAPE HAVING FLANGE 失效
公开(公告)号：JPS645601A
公开(公告)日：1989-01-10
申请号：JP16092987
申请日：1987-06-30
申请人： NIPPON STEEL CORP
发明人： IKUTA KAZUE , KUROKAWA MASAO , NISHINO TANEHARU
IPC分类号： B21B1/095 , B21B1/08 , B21B1/088
摘要： PURPOSE:To form a shape which has a large ratio of its flange thickness to its web thickness without generation of rolling web wave by specifying a moving amount and a draft at the time of moving vertical roll of a universal rolling mill in the rolling direction. CONSTITUTION:An H-shape steel is rolled by moving a vertical roll 2a of a universal rolling mill 2 in the rolling direction. In that case, a web elongation amount and a flange elongation amount are equalized to each other by specifying drafts for a web and a flange. Together with that, the axis of the vertical roll 2a is moved in the rolling direction from the axis of a horizontal roll 2b within a range of a distance 2.0 times as long as a difference D between respective roll contact projected lengths l1, l2 of a flange of a stock 1 to be rolled sandwiched between the vertical roll 2a and a side of the horizontal roll 2b and of the web sandwiched between the rolls 2a, 2b. Hence, the stock 1 having a thin web and a large thickness ratio between the flange and web is rolled without generation of rolling web waveforms.

5. 发明专利

JPS63260874A CERAMIC-CLAD STRUCTURE 失效
公开(公告)号：JPS63260874A
公开(公告)日：1988-10-27
申请号：JP23604187
申请日：1987-09-19
申请人： NIPPON STEEL CORP
发明人： NISHIO MIKIO , TSUZUKI MINORU , KUROKAWA MASAO , TAKAHASHI TOSHIO
IPC分类号： C04B37/02

6. 发明专利

JPS6243766B2 失效
公开(公告)号：JPS6243766B2
公开(公告)日：1987-09-16
申请号：JP15679782
申请日：1982-09-10
申请人： NIPPON STEEL CORP
发明人： KUROKAWA MASAO , KAWARADA MINORU , SAKAGUCHI MASANOBU , SAOKA AKIHIRO
IPC分类号： B21B1/08 , B21B45/02 , B21D3/00

7. 发明专利

JPH10147836A 590MPA CLASS ROLLED SHAPE STEEL AND ITS PRODUCTION 失效
公开(公告)号：JPH10147836A
公开(公告)日：1998-06-02
申请号：JP30473996
申请日：1996-11-15
申请人： NIPPON STEEL CORP
发明人： YAMAMOTO KOICHI , SATOU HIROAKI , KUROKAWA MASAO
IPC分类号： B22D11/00 , B22D11/12 , C21D8/00 , C22C38/00 , C22C38/16
摘要： PROBLEM TO BE SOLVED: To obtain 590MPa class shape steel having a high strength and excellent in toughness as-rolled at a low cost by specifying the compsn. composed of C, Si, Mn, Cu, Ti, Mg, Nb, V, Mo, N, O and Fe and limiting the contents of B and Al among inevitable impurities. SOLUTION: A 590MPa class rolled shape steel having a compsn. contg., by weight, 0.02 to 0.06% C, 0.05 to 0.25% Si, 0.87 to 1.6% Mn, 0.7 to 1.5% Cu, 0.012 to 0.030% Ti, 0.0005 to 0.0050% Mg, 0.005 to 0.03% Nb, 0.01 to 0.1% V, 0.05 to 0.4% Mo, 0.004 to 0.010% N and 0.003 to 0.006% O, also satisfying Ti/N; 3.0 to 3.5, furthermore contg., at need, one or more kinds of 0.1 to 1.0% Cr and 0.1 to 2.0% Ni, and the balance Fe with inevitable impurities, and among this impurities, the content of B is limited to

8. 发明专利

JPH09272949A SHAPE STEEL HAVING TIGHT SCALE AND ITS PRODUCTION 失效
公开(公告)号：JPH09272949A
公开(公告)日：1997-10-21
申请号：JP8560496
申请日：1996-04-08
申请人： NIPPON STEEL CORP
发明人： WAKE MAKOTO , KUROKAWA MASAO , KAGEYAMA MASATO , YAMAMOTO KOICHI
IPC分类号： B21B45/00 , B21B1/08 , B21B1/088 , B21B45/08 , C21D8/00 , C21D9/00 , C22C38/00 , C22C38/12
摘要： PROBLEM TO BE SOLVED: To produce a shape steel with a tight scale having the thickness of a specified value or below and excellent in adhesion on the surface, in a shape steel contg. a specified amt. or above of Si, by incorporating a suitable amt. of Mo, regulating the content of S into a specified level and specifying the conditions of heating, hot rolling, descaling before and after finish rolling, and cooling. SOLUTION: A slab contg., by weight 0.03 to 0.22% C, 0.1 to 035% Si, 0.2 to 0.6% Mn, =25kg/cm bombarding pressure so as to regulate the number of the bombarding within 5 sec to the same place on the surface of the shape steel to 2 times within 5sec to execute descaling-which is subjected to hot finish rolling at a rolling temp. of 700 to 1000 deg.C at a draft of

9. 发明专利

JPH08247667A COMPOSITE PIPE AND POWDER/GRAIN BLOWING NOZZLE 失效
公开(公告)号：JPH08247667A
公开(公告)日：1996-09-27
申请号：JP7847295
申请日：1995-03-10
申请人： NIPPON STEEL CORP
发明人： KUROKAWA MASAO , TAIRA HATSUO
IPC分类号： C04B37/02 , F27D3/18
摘要： PURPOSE: To prevent dropping of ceramics or chipping of ceramics owing to resonance by a method wherein a peripheral or helical recess groove is formed in the inner periphery of a metallic pipe or the outer periphery of a ceramics pipe and the recess groove is filled with a buffering layer. CONSTITUTION: Even when temperature is increased to a value higher than a working limit and a force to adhere a metallic pipe 2 to a ceramics pipe 3 is decreased owing to a difference in the coefficient of linear expansion between ceramics and a shape memory alloy, the metallic pipe 2 and a buffering layer 4 are fixed by a groove 5 formed in the metallic pipe 2 and a protrusion 4a formed on the buffering layer 4. Further, the ceramic pipe 3 and the buffering layer 4 are fixed by a groove 6 formed in the ceramics pipe 3 and a protrusion 4b formed on the buffering layer 4. As a result, the metallic pipe 2 and the ceramics pipe 3 are fixed through the buffering layer 4. This constitution not only prevents the drop of the ceramics pipe but also prevents the generation of vibration, and prevents the occurrence of damage owing to chipping of ceramics.

10. 发明专利

JPH08199290A HIGH STRENGTH GAUGE H STEEL EXCELLENT IN SURFACE CHARACTERISTIC AND ITS PRODUCTION 失效
公开(公告)号：JPH08199290A
公开(公告)日：1996-08-06
申请号：JP1235495
申请日：1995-01-30
申请人： NIPPON STEEL CORP
发明人： YOSHIDA TAKU , YAMAMOTO KOICHI , KUROKAWA MASAO
IPC分类号： B21B3/00 , C21D8/00 , C21D9/00 , C22C38/00 , C22C38/20 , C22C38/58
摘要： PURPOSE: To form a Cr oxide film and to obtain excellent surface characteristic, corrosion resistance, and toughness by adding prescribed amounts of Cr and Cu to a composition and controlling rolling and also controlling cooling conditions after rolling. CONSTITUTION: This gauge H steel has a composition containing, by weight ratio, 0.05-0.15% C, 0.05-0.50% Si, 0.8-2.0% Mn, 0.003-0.015% N,

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