专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH10314897A MOLD POWDER FOR CONTINUOUSLY CASTING STEEL 失效
公开(公告)号：JPH10314897A
公开(公告)日：1998-12-02
申请号：JP14465297
申请日：1997-05-19
申请人： NIPPON KOKAN KK , KOKAN MINING CO LTD , SHINAGAWA REFRACTORIES CO
发明人： NAKAJIMA HIROHISA , KONDO HIROKAZU , MIYAMOTO AKIRA , WATANABE KEIJI , SAKAI HIDENORI , IZUMI HIROSHI , MORITA AKIHIRO , FUJIWARA HIDEAKI
IPC分类号： B22D11/07 , B22D11/108
摘要： PROBLEM TO BE SOLVED: To prevent the crack on the surface of a cast slab in a continuous casting for a steel, particularly a medium carbon steel. SOLUTION: Mold powder used for the continuous casting, has a basicity (CaO wt.%/SiO2 wt.%) in the range of 1.1-2.4 and contains 2-8 wt.% fluorine and 1-7 wt.% Al2 O3 . Further, the content of premelt flux in this mold powder satisfies the following inequality. (premelt flux wt.%)>=25×(CaO wt.%/SiO2 wt.%)+35. The above basicity is further desirable to be 1.3-1.6. Further, to the premelt flux, 4-25 wt.% one or more kinds of cryolite, NaF, fluorite, soda ash and Li2 O and 1-8 wt.% carbonaceous material can further be added.

2. 发明专利

JPH08267204A MOLD POWDER FOR CONTINUOUSLY CASTING MEDIUM CARBON STEEL CAST SLAB AND METHOD FOR CONTINUOUSLY CASTING MEDIUM CARBON STEEL CAST SLAB 失效
公开(公告)号：JPH08267204A
公开(公告)日：1996-10-15
申请号：JP9810195
申请日：1995-03-30
申请人： NIPPON KOKAN KK , KOKAN MINING CO LTD
发明人： OKAMOTO HIROMI , WATANABE KEIJI , KONDO HIROKAZU , MIYAMOTO AKIRA , SAKAI HIDENORI , SHIMIZU MASAAKI , NAKAYAMA NOBUTAKA
IPC分类号： B22D11/00 , B22D11/10 , B22D11/108 , B22D11/111 , B22D11/16
摘要： PURPOSE: To provide mold powder for continuous casting which prevents the development of the longitudinal crack on a cast slab caused by the development of uneven solidified shell in a mold, and to provide a method for continuously casting medium carbon steel cast slab. CONSTITUTION: This mold powder for continuous casting has a compsn. containing essentially CaO and SiO2 in a ratio CaO/SiO2 (by wt.%) of 1.2-1.6 and 2-6wt.% in total of MgO+LiO2 . The molten powder is cooled at least to =50% evaluated crystallizing ratio.

3. 发明专利

JPH08141713A MOLDING POWDER FOR CONTINUOUS CASTING OF STEEL 失效
公开(公告)号：JPH08141713A
公开(公告)日：1996-06-04
申请号：JP30168694
申请日：1994-11-11
申请人： NIPPON KOKAN KK , KOKAN MINING CO LTD
发明人： KAWANAMI SHUNICHI , TOYODA KOJI , MORI TAKASHI , KONDO HIROKAZU , NISHIMACHI RIYUUZOU , WATANABE KEIJI , MIYAMOTO AKIRA , SAKAI HIDENORI , SHIMIZU MASAAKI , IZUMI HIROSHI , KAWASHIMA TAKESHI
IPC分类号： B22D27/18 , B22D11/00 , B22D11/07 , B22D11/10 , B22D11/108 , B22D11/111
摘要： PURPOSE: To enable continuous casting of steel having excellent quality by specifying CaO/SiO2 and and specifying content of MgO. CONSTITUTION: The essential components of this powder for continuous casting of steel are composed of CaO and SiO2 . The CaO/SiO2 (wt.% basicity) is specified to 1.2 to 1.6 and the content of the MgO to 1.5wt.%. The content of any >=1 kinds among quartz crystal stone, NaF, fluorite, soda ashes and Li2 O is specified to 4 to 25wt.% and the content of any >=1 kinds among carbon black, flaky graphite to 1 to 8wt.%. The balance is composed of the CaO and the SiO2 and the CaO/SiO2 (wt.% basicity) to 1.2 to 1.6. As a result, the molding powder for continuous casting having the high rate of crystallization is obtd. within a range where meltability is not hindered.

4. 发明专利

JP2002080909A METHOD AND DEVICE FOR REMOVING STUCK MATERIAL ON DISCHARGING HOLE IN LADLE 失效
公开(公告)号：JP2002080909A
公开(公告)日：2002-03-22
申请号：JP2000273625
申请日：2000-09-08
申请人： NIPPON KOKAN KK , MENTEC KIKO KK
发明人： MURAKAMI NAOHIKO , MIYAMOTO AKIRA
IPC分类号： C21C1/06 , F27D25/00 , F27D23/02
摘要： PROBLEM TO BE SOLVED: To provide a method and an apparatus for removing stuck material on a discharging hole in a ladle, with which the stuck slag on the discharging hole in the molten metal ladle mounted on a carrier can be removed without damaging a brick and also, the operating efficiency of the apparatus can be improved by eliminating the restriction of a locomotive. SOLUTION: In the method for removing the stuck material on the discharging hole 32 in the molten metal ladle mounted on the carrier 30, a process for detecting the height of the upper surface of the discharging hole with limit switches 10a, 10b in a discharging hole height detecting instrument to match the discharging hole to the height of a slag crushing device, a process for interposing both side parts of the discharging hole with a discharging hole clamping device and a process for removing the stuck material on the discharging hole with the slag crushing device, are provided.

5. 发明专利

JP2001131694A HIGH STRENGTH COLD ROLLED STEEL SHEET OR HIGH STRENGTH GALVANIZED STEEL SHEET EXCELLENT IN FACIAL STRAIN RESISTANCE AND PRESS FORMABILITY AND METHOD FOR PRODUCING SAME 失效
公开(公告)号：JP2001131694A
公开(公告)日：2001-05-15
申请号：JP31559699
申请日：1999-11-05
申请人： NIPPON KOKAN KK
发明人： FUJITA TAKESHI , NAKAJIMA KATSUMI , MITSUZUKA KENICHI , TSURUMARU HIDEYUKI , MIYAMOTO AKIRA , URABE TOSHIAKI
IPC分类号： C21D9/46 , C22C38/00 , C22C38/12 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To obtain a high strength cold rolled steel sheet excellent in breaking resistance in composite forming such as drawing and bulging, and small in facial strain damaging the appearance after press forming and having tensile strength of >=440 MPa. SOLUTION: This high strength cold rolled steel sheet excellent in facial strain resistance and press formability has a composition containing, by weight, 0.0040 to 0.010% C, =0.0075×YP(MPa)-r, (3) 2.2

6. 发明专利

JP2001131692A HIGH STRENGTH COLD ROLLED STEEL SHEET OR HIGH STRENGTH GALVANIZED STEEL SHEET EXCELLENT IN SURFACE PROPERTY AND PRESS FORMABILITY AND PRODUCING METHOD THEREFOR 失效
公开(公告)号：JP2001131692A
公开(公告)日：2001-05-15
申请号：JP31559599
申请日：1999-11-05
申请人： NIPPON KOKAN KK
发明人： HASEGAWA KOHEI , NAKAJIMA KATSUMI , FUJITA TAKESHI , NAKAMURA SEIJI , SEKIGUCHI MASAHIKO , MIYAMOTO AKIRA , URABE TOSHIAKI
IPC分类号： B21B3/00 , C21D9/46 , C22C38/00 , C22C38/12 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To produce a high strength cold rolled steel sheet or a high strength galvanized steel sheet excellent in high formability and surface roughening resistance required for automotive outer board panels such as hoods, doors, fenders and side panels or automotive structural members such as members and reinforcements and free from surface defects in the original sheet and after pressing and to provide a method for producing the same at a low cost. SOLUTION: This high strength cold rolled steel sheet or a high strength galvanized steel sheet excellent in surface properties and press formability has a composition containing, by weight, 0.0040 to 0.010% C, 1.1 to

7. 发明专利

JP2001131689A COLD ROLLED STEEL SHEET SMALL IN VARIATION OF MATERIAL IN COIL AND PRODUCING METHOD THEREFOR 失效
公开(公告)号：JP2001131689A
公开(公告)日：2001-05-15
申请号：JP31213599
申请日：1999-11-02
申请人： NIPPON KOKAN KK
发明人： HASEGAWA KOHEI , URABE TOSHIAKI , NOIDE SHUNSAKU , MIYAMOTO AKIRA
IPC分类号： C21D8/04 , C21D9/46 , C21D9/48 , C22C38/00 , C22C38/12 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To produce a BH steel sheet in which cold aging is suppressed while the content of BH is stably secured and moreover free from problems caused by nitrides such as the variation of the material in a coil and the reduction of formability. SOLUTION: This cold rolled steel sheet has a composition containing, by weight, 0.0010 to 0.0025% C,

8. 发明专利

JP2001020009A METHOD FOR CLEANING GAS BLOWING UPPER NOZZLE USED FOR OPENING/CLOSING NOZZLE OF MOLTEN METAL VESSEL 失效
公开(公告)号：JP2001020009A
公开(公告)日：2001-01-23
申请号：JP19264799
申请日：1999-07-07
申请人： NIPPON KOKAN KK
发明人： ISHII KENJI , MIYAMOTO AKIRA , NAKASHIN YOSHITAKA , KONDO HIROKAZU
IPC分类号： B22D11/10 , C21C5/46 , C21C7/072
摘要： PROBLEM TO BE SOLVED: To secure the remaining thickness of a porous brick even after oxygen-cleaning by blowing oxygen to metal solidified in the inner part of a gas blowing upper nozzle, generating heat, melting the metal and blowing a specified flowing quantity of inert gas from the porous brick disposed in the upper nozzle when the metal is removed. SOLUTION: After using the upper nozzle 23, for using this nozzle again, steel 25 solidified in the upper nozzle 23 is melted and removed. For example, oxygen is blown from a pipe 26 to the steel 25 solidified in the upper nozzle 23 fitted to the upper part of an opening/closing nozzle 22 in a tilted tundish 21, and heat is generated with an oxidizing reaction and the steel 25 is melted and removed. At this time, a molten iron oxide is produced and slag is infiltrated into the upper nozzle refractory, particularly the porous brick, and the refractory is eroded. In such a case, inert gas such as Ar of 5-30 l/min is blown from the porous brick disposed in the upper nozzle 23 to prevent the infiltration of the slag into the porous brick.

9. 发明专利

JPH1177268A METHOD FOR CONTROLLING MOLTEN METAL SURFACE LEVEL IN MOLD FOR CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH1177268A
公开(公告)日：1999-03-23
申请号：JP29988797
申请日：1997-10-31
申请人： NIPPON KOKAN KK
发明人： MIZUNO HIROSHI , IIJIMA KEIJI , KADOTA JUNICHI , KONDO HIROKAZU , MIYAMOTO AKIRA
IPC分类号： B22D11/16 , B22D11/18 , G05B13/02 , G05D9/00
摘要： PROBLEM TO BE SOLVED: To enable the holding of effective control by instantially following to the frequency even if the frequency of variation of bulging molten metal surface varies with casting speed. SOLUTION: The control method of the molten metal surface level in a mold for continuous casting machine is executed by executing a control calculation based on the molten metal 2 surface level in the mold 5 in the continuous casting machine and the setting molten metal surface level and using a gain scheduling controller obtd. with the result in a convex optimization problem under constraining condition to a linear matrix inequality as a control device 9 for outputting opening degree command of a sliding nozzle to a sliding nozzle controller 8 so that the molten metal surface level becomes the constant. The bulging frequency as the frequency in the variation of the bulging molten metal surface is followingly detected by executing an on-line frequency analysis to the molten metal surface level signal continuously detected, and based on this detected result, a parameter in the gain scheduling controller is continuously changed.

10. 发明专利

JPH10314911A DEVICE FOR CONTROLLING MOLTEN METAL SURFACE LEVEL IN MOLD OF CONTINUOUS CASTER 失效
公开(公告)号：JPH10314911A
公开(公告)日：1998-12-02
申请号：JP35792897
申请日：1997-12-25
申请人： NIPPON KOKAN KK
发明人： MIZUNO HIROSHI , IIJIMA KEIJI , KADOTA JUNICHI , KONDO HIROKAZU , MIYAMOTO AKIRA
IPC分类号： B22D11/16 , B22D11/18 , G05D9/12
摘要： PROBLEM TO BE SOLVED: To efficiently and drastically reduce the variation of bulging molten metal surface during stationary casting. SOLUTION: This molten metal surface level control device is provided with a molten metal surface level meter 4 for detecting the surface level of the molten metal 2 in a mold 5 in a continuous caster, a PI controller 10 for outputting the opening degree command for a sliding nozzle 3 arranged in a tundish 1 based on a deviation between the molten metal surface level measured with the molten metal surface level meter 4 and a setting molten metal surface level, a sliding nozzle controller 8 for adjusting the flow rate of the molten metal 2 from the tundish 1 by inputting the opening degree command from the PI controller 10 to adjust the opening degree of the sliding nozzle 3, and a disturbance compensating device 11 having characteristic extracting the variation of the bulging molten metal surface having large specific period from the deviation signal between the molten metal surface level and the setting molten metal surface level and outputting by advancing this phase characteristic to a specific range. Then, a signal multiplying the outputted signal from the distance compensating device 1 by an adjustable gain 12 is added to the opening degree command from the PI controller 10 to obtain the final opening degree command of the sliding nozzle 3.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式