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1. 发明专利

JPH06271948A METHOD FOR HEAT-TREATING TITANIUM ALLOY MATERIAL 失效
公开(公告)号：JPH06271948A
公开(公告)日：1994-09-27
申请号：JP5990793
申请日：1993-03-19
申请人： NIPPON KOKAN KK
发明人： HASEGAWA TOSHIYUKI , AKIYAMA SHUNICHI , SHOJI KIYOSHI
IPC分类号： C21D11/00 , C22F1/00 , C22F1/18
摘要： PURPOSE:To accurately and easily subject a titanium alloy material to heat treatment at the maximum temp. by measuring the temp. at a position in which the maximum temp. is attained in the vicinity of the titanium alloy material in a heating furnace and estimating the surface temp. of the titanium alloy material from the same measured temp. CONSTITUTION:A titanium alloy material B arranged in a heating furnace 1 is heated by a heater 11 and is subjected to heat treatment. At this time, a temp. measuring jig 2 constituted by fitting the upper face and lower face of a fire brick with thermocouples 4 and 5 is attached to the surface of the titanium alloy material B. A position in which the maximum temp. is attained in the vicinity of the titanium alloy material B is grasped, and the temp. at this position is measured at the rising temp. measuring part of the thermocouple 4 on the upper face. This measured temp. is inputted into a computer 10 via a transforming unit 6 and a displaying instrument 8, and according to this input the surface temp. of the titanium allay material B is estimated. Based on this estimated value and while the measured value of the thermocouple 5 is referred, the heater 11 is adjusted, and the heat treatment is controlled.

2. 发明专利

JPH0699212A METHOD FOR ROLLING THICK PLATE 失效
公开(公告)号：JPH0699212A
公开(公告)日：1994-04-12
申请号：JP24814492
申请日：1992-09-17
申请人： NIPPON KOKAN KK
发明人： HASEGAWA TOSHIYUKI
IPC分类号： B21B1/38 , B21B39/00 , C21D1/767
摘要： PURPOSE:To prevent the generation of camber by placing a heat insulating material on a base stock for thick plate between after extracting it from a heating furnace and just before feeding it to a rolling mill in a method for rolling a thick plate by which the base stock for thick plate is heated in the heating furnace and rolled with the rolling mill after that. CONSTITUTION:A main-body slab 2 of the base stock for plate is charged into the heating furnace 1 in the state that the slab 2 is placed on a underlay slab by interposing fire bricks and, simultaneously, a putting-on slab 4 of the heat insulating material is also charged. The main-body slab 2 consists of a thick plate made of Ti-6Al-4V alloy. The main-body slab 2 and the putting-on slab 4 are sufficiently heated by the same heat pattern in the heating furnace. Next, the main-body slab 2 and the putting-on slab 4 are integrally extracted from the heating furnace 1. Successively, they are transported just before the rolling mill, the putting-on slab 4 is separated from the main-body slab 2, the main-body slab 2 is fed to the rolling mill and rolling is executed at a prescribed rolling reduction. In this way, it is restrained that the upside of the main-body slab 2 is cooled and the generation of camber on the main-body slab during rolling is prevented.

3. 发明专利

JPH05104103A METHOD FOR ROLLING CONTROL ROLLED STEEL PLATE EXCELLENT IN HOMOGENEITY OF MATERIAL 失效
公开(公告)号：JPH05104103A
公开(公告)日：1993-04-27
申请号：JP28943291
申请日：1991-10-09
申请人： NIPPON KOKAN KK
发明人： HASEGAWA TOSHIYUKI , OZAWA SADAO , UCHIDA SHOJIRO , KOMATA KAZUO
IPC分类号： B21B1/38 , B21B15/00 , C22C38/00
摘要： PURPOSE:To manufacture a high-strength and high-toughness thick steel plate excellent in the homogeneity of material with high yield. CONSTITUTION:In the case broadside rolling and finish rolling succeeding to that are executed to a slab 1, center descaling is executed at the time of broadside rolling and then finish rolling is executed at constant speed. In this way, it is possible to reduce the region of inhomogeneous part of material in the plate by decreasing the temp. deviation of the steel plate 1a in the end parts 1a in the longitudinal direction of rolling.

4. 发明专利

JPH0543949A METHOD FOR OPERATING HEAT TREATMENT OF STEEL PLATE 失效
公开(公告)号：JPH0543949A
公开(公告)日：1993-02-23
申请号：JP22836591
申请日：1991-08-13
申请人： NIPPON KOKAN KK
发明人： HASEGAWA TOSHIYUKI , SHIMODA TATSUYA , KOMATA KAZUO , SAITO SHOJI
IPC分类号： C21D11/00
摘要： PURPOSE:To enable simple furnace operation by calculating steel plate temp. from conduction heat in a furnace and extracting the steel plate from the furnace according to the calculated value as a reference. CONSTITUTION:The steel plate temp. is calculated from the conduction heat in the heat treatment furnace. Based on the calculated value, the steel plate from the heat treatment furnace is extracted. At the time of calculating the steel plate temp. from the conduction heat, the equation I is used. Where, t: time, T: temp. in the steel plate, C: sp. heat of the steel plate, gamma: sp. gr., lambda: thermal conductivity. By this method, high strength steel can be manufactured in low cost.

5. 发明专利

JPH0499844A STEEL SHEET FOR GLASS LINING APPARATUS 失效
公开(公告)号：JPH0499844A
公开(公告)日：1992-03-31
申请号：JP21167890
申请日：1990-08-13
申请人： NIPPON KOKAN KK , IKEBUKURO HOUROU KOUGIYOU KK
发明人： ABE NAKATSUGU , HASEGAWA TOSHIYUKI , HIRABE KENJI , ASADA TSUKASA , YAKO KAZUNORI , KUNISADA YASUNOBU , YAMADA TAKESHI , IIZAWA YOSHIHIRO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/14
摘要： PURPOSE:To obtain a steel sheet having glass lining resistance and low in the deterioration in material caused by repeated heating and cooling by subjecting a steel having a specified compsn. constituted of C, Si, Mn, Al, TN, Nb, Ti and Fe to specified heat treatment and thereafter rolling it. CONSTITUTION:A steel contg., by weight, 0.04 to 0.15% C, 0.01 to 0.5% Si, 0.10 to 2.0% Mn, 0.005 to 0.10% Sol.Al and 0.0020 to 0.050% TN, contg. one or two kinds of 0.005 to 0.10% Nb and 0.005 to 0.10% Ti, furthermore contg., at need, prescribed amounts of Cu, Ni, Cr, Mo, etc., and the balance Fe with inevitable impurities is heated to >=1100 deg.C and is rolled, and its finishing temp. is regulated to >=650 deg.C. In this way, the steel sheet for a glass lining apparatus having excellent glass lining resistance and low in the deterioration in material even in the case of the thermal hysteresis of repeated heating and cooling in the stage of glass burning can be obtd.

6. 发明专利

JPH06126527A PLATE CUTTING DEVICE 失效
公开(公告)号：JPH06126527A
公开(公告)日：1994-05-10
申请号：JP28190892
申请日：1992-10-20
申请人： NIPPON KOKAN KK
发明人： SAITO SHOJI , HASEGAWA TOSHIYUKI , SAKOTA KATSUTOSHI , KOBAYASHI MASAO
IPC分类号： B23D55/04
摘要： PURPOSE:To provide a plate cutting device capable of efficiently cutting the perimeter of a plate over the full length, and of sufficiently ensuring the safety of operators. CONSTITUTION:A first cutting mechanism 1 for performing finishing work of the width of a plate B and a second cutting mechanism 2 for performing finishing work of the length of the plate B are arranged so that an extension line of the cutting plane of a sawing machine 5 for width-finishing in the first cutting mechanism 1 and an extension line of the cutting plane of a sawing machine 6 for length-finishing in the second cutting mechanism 2 cross at right angles. A first conveying means 19 conveys the plate B in the width direction (a) of the plate between the first cutting mechanism 1 and a conveying- intermediate position 3, and a second conveying means 20 conveys the plate B in the longitudinal direction (b) of the plate between the second cutting mechanism 2 and the conveying-intermediate position 3.

7. 发明专利

JPH04202618A PRODUCTION OF THICK PLATE OF 60KGF/MM2 CLASS HIGH TENSILE STRENGTH STEEL 失效
公开(公告)号：JPH04202618A
公开(公告)日：1992-07-23
申请号：JP32942290
申请日：1990-11-30
申请人： NIPPON KOKAN KK
发明人： HASEGAWA TOSHIYUKI , SAKUI ARATA , HONDA TAKAYUKI , HIRABE KENJI , IWASAKI NORIHIRO
IPC分类号： C21D8/02 , C22C38/00 , C22C38/50
摘要： PURPOSE:To stably produce a thick high tensile strength steel plate by subjecting a slab of a steel prepared by adding trace amounts of Ti to a composition containing small amounts of Cu, Ni, Cr, Mo, and V to hot rolling and quenching under respectively specified conditions and then to tempering treatment. CONSTITUTION:A slab of a steel having a composition containing, by weight, 0.08=0.16% C, 0.10-0.55% Si, 1.0-1.50% Mn, 0.01-0.30% Cu, 0.01-0.30% Ni, 0.01-0.30% Cr, 0.01-0.20% Mo, 0.01-0.08% V, 0.001-0.02% Ti, 0.010-0.10% sol.Al, and =950 deg.C at >=50% reduction of area, and finish rolling is completed at a temp. not lower than (Ar3+50 deg.C). The resulting plate is quenched from =5 deg.C/sec cooling rate and then subjected to tempering treatment. By this method, the thick plate of >=60kgf/ mm high tensile strength steel having >=40mm plate thickness can be produced.

8. 发明专利

JPH04191322A METHOD FOR HOMOGENIZING TREATMENT OF STEEL 失效
公开(公告)号：JPH04191322A
公开(公告)日：1992-07-09
申请号：JP31773490
申请日：1990-11-26
申请人： NIPPON KOKAN KK
发明人： HASEGAWA TOSHIYUKI , SAKUI ARATA , HIRABE KENJI , OSANAWA YUTAKA
IPC分类号： C21D9/00
摘要： PURPOSE:To uniformize the material properties of steel in the direction of the sheet thickness by holding the temp. of a heating furnace to a specified range, holding steel therein for specified time and diffusing segregation in the steel. CONSTITUTION:Steel after ingot-making or continuous casting is held in a heating furnace in which temp. is held to the range of 1250 to 1350 deg.C for 10 to 30 hr to diffuse segregation in the steel. In this way, the material properties (strength, workability, weldability or the like) of the steel in the direction of the sheet thickness can be uniformized.

9. 发明专利

JPH04187715A PRODUCTION OF HIGH TENSILE STRENGTH STEEL WITH LOW YIELD RATIO EXCELLENT IN ACOUSTIC ANISOTROPY 失效
公开(公告)号：JPH04187715A
公开(公告)日：1992-07-06
申请号：JP31575190
申请日：1990-11-22
申请人： NIPPON KOKAN KK
发明人： OSANAWA YUTAKA , HASEGAWA TOSHIYUKI , SHIKAUCHI NOBUO , MATSUOKA TOSHIO , ISHIKAWA HIROSHI
IPC分类号： C21D8/02
摘要： PURPOSE:To obtain a high tensile strength steel with low yield ratio excellent in acoustic anisotropy by subjecting a slab of steel having limited compositional limit values to treatment under respectively prescribed controlled rolling conditions and accelerated cooling conditions. CONSTITUTION:A slab in which P, S, and CeqWES are regulated, by weight, to

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