专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

41. 发明专利

JP2001219250A DEVICE AND METHOD FOR CONTROLLING TEMPERATURE OF MOLTEN STEEL IN TUNDISH, AND COMPUTER-READABLE STORAGE MEDIUM 失效
公开(公告)号：JP2001219250A
公开(公告)日：2001-08-14
申请号：JP2000030889
申请日：2000-02-08
申请人： NIPPON STEEL CORP
发明人： HASEGAWA AKIHIKO , TSUNENARI KEIJI , IZU TADAHIRO
IPC分类号： B22D11/10 , B22D11/16 , B22D41/005 , B22D46/00
摘要： PROBLEM TO BE SOLVED: To improve the accuracy in controlling the molten steel temperature in a tundish. SOLUTION: A control unit 17 operates and estimates the temperature T(t+i) of the molten steel in the tundish 2 at the i-sampling time ahead using the present molten steel temperature T(t) in the tundish 2, the temporal change Gi.Δu of the molten steel temperature in the tundish 2 estimated in changing the plasma heating power of a main power source 9, and the change ΔTi in the molten steel temperature in the tundish 2 estimated based on the casting process such as the pouring of the molten steel from a ladle 1 and the pouring of the molten steel in a mold 6. The optimum change Δu in the plasma heating power of the main power source 9 is operated from the estimated molten steel temperature T(t+i) and the preset target molten steel temperature r, and the molten steel temperature in the tundish 2 is controlled by changing the plasma heating power of the main power source 9 by the change Δu in the plasma heating power.

42. 发明专利

JP2000202618A COMBUSTIBLE CUP FOR SLIDING NOZZLE AND PLUGGING METHOD FOR PREVENTING FILLING MATERIAL INTO SLIDING NOZZLE USING THE CUP 失效
公开(公告)号：JP2000202618A
公开(公告)日：2000-07-25
申请号：JP252999
申请日：1999-01-08
申请人： NIPPON STEEL CORP
发明人： KOBAYASHI HIDEAKI , IZU TADAHIRO , IMOTO TADASHI
IPC分类号： B22D11/10 , B22D41/44
摘要： PROBLEM TO BE SOLVED: To provide a cup constituting a plug for preventing the drop of filling material improved to surely execute the opening of a nozzle without mechanical interfering with the filling material, and a plugging method for preventing the drop of the filling material in a sliding nozzle by using the cup. SOLUTION: The combustible cup is constituted of the plug 5 for preventing the drop of the filling material 7 in the upper-half part of the nozzle 12 in the sliding nozzle of a ladle for molten metal. After filling the above filling material 7 into the combustible cup and covering with a carbon sheet, the cup is turned upside down and inserted into the upper half part of the nozzle 12. Successively, the above filling material 7 is supplied on the inserted cup 5 to fill up the upper half part of the nozzle.

43. 发明专利

JP2000237848A METHOD FOR CONTROLLING ROLLING REDUCTION OF ROLLS IN TWIN ROLL TYPE CONTINUOUS CASTING 失效
公开(公告)号：JP2000237848A
公开(公告)日：2000-09-05
申请号：JP3984599
申请日：1999-02-18
申请人： NIPPON STEEL CORP
发明人： IZU TADAHIRO , TSUKAMOTO RYUTA , ISAKI HIROSHI
IPC分类号： B22D11/06 , B22D11/04 , B22D11/05 , B22D11/16
摘要： PROBLEM TO BE SOLVED: To prevent the development of tear-off and breakout caused by a hot-band of a cast strip by sensing the development of the hot band from the variation of reaction of rolls or gap of the rolls, fastening the roll gap just after passing the roll reaction through the max. value, keeping the suitable roll reduction and executing the casting. SOLUTION: Signal of the roll reaction with a reaction detector 1 is compared with the reaction target value with a reaction control device 2 and a hydraulic servo valve 3 is controlled with the signal according to a difference and a rolling reduction position is controlled so that the roll reaction becomes the target reaction with a hydraulic cylinder 4. Further, a signal of the roll position with a positional detector 5 is compared with the drum gap target value through a rolling reduction control unit 6 and the drum position is controlled so as to become the target gap by controlling a motor M through a roll speed control unit 7 with the signal according to the difference to obtain the cast strip having a prescribed strip thickness.

44. 发明专利

JP2000202588A TWIN ROLL CONTINUOUS CASTING METHOD AND APPARATUS THEREOF 失效
公开(公告)号：JP2000202588A
公开(公告)日：2000-07-25
申请号：JP534899
申请日：1999-01-12
申请人： NIPPON STEEL CORP
发明人： ARAI TAKASHI , IZU TADAHIRO , ISAKI HIROSHI
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To provide a twin roll continuous casting method and an apparatus thereof, with which the pushing control of a side weir can be executed in response to the displacement of the end surfaces of cooling rolls during executing the casting. SOLUTION: A relational expression is beforehand obtained from many preceded casting heats and the temperature of cooling water for cooling the inner part of the cooling roll 1 at the flow-in side and the flow-out side is measured continuously during executing the actual casting. As the other way, the displacement of the rotating shaft of the cooling roll 1 is measured and this measured value is used and the displacement of the end surface of the cooling roll 1 is estimated from the above relational expression, and based on this estimated value, one side or both of the pushing force and the pushing speed of the side weir 3 are controlled. Further, as the other way, the displacement of the end surface of the cooling roll is measured continuously during executing the actual casting, and based on this measured value, one side or both of the pushing force and the pushing speed of the side weir are controlled.

45. 发明专利

JP2000190054A METHOD AND DEVICE FOR PREHEATING COOLING DRUM IN TWIN ROLL TYPE CONTINUOUS CASTING FACILITY 失效
公开(公告)号：JP2000190054A
公开(公告)日：2000-07-11
申请号：JP36456898
申请日：1998-12-22
申请人： NIPPON STEEL CORP
发明人： ODA TAKASHI , IZU TADAHIRO
IPC分类号： B22D11/06 , B22D11/16 , B22D11/22
摘要： PROBLEM TO BE SOLVED: To provide a drum preheating device for stabilizing a pressing condition of a side weir to a cooling drum in a twin roll type continuous casting device for manufacturing a thin sheet cast piece. SOLUTION: In this drum preheating method of a twin roll type continuous casting facility, a fixed axis box 3 for fixing a cooling drum axis in a manner not to disposition a cooling drum 1 in an axial direction is installed on an exhaust port side of the cooling water after the cooling drum 1 is cooled. The entire cooling drum is preheated to the temperature equivalent to an average temperature level during casting with the cooling water preheated to the temperature of the same level as the exhausted water temperature till the start of casting in a manner to foresee the temperature rising volume of the cooling water being calculated from the heat releasing volume required for solidification. Furthermore, simultaneously with the start of casting, an operation for lowering the temperature of the cooling water entering the cooling drum 1 is started so as to make the temperature of the exhausted cooling water to be the same level of temperature as the water temperature at the preheating time.

46. 发明专利

JP2002219557A TWIN DRUM TYPE CONTINUOUSLY CASTING DRUM 失效
公开(公告)号：JP2002219557A
公开(公告)日：2002-08-06
申请号：JP2001015357
申请日：2001-01-24
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： ISOKAMI KATSUYUKI , YAMADA MAMORU , TANAGA TAKESHI , ISAKI HIROSHI , IZU TADAHIRO , TSUNENARI KEIJI , YAMAMURA KAZUTO , MIYAKE KATSUYOSHI , YOKOO KAZUTOSHI , SASAKI KUNIMASA
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To provide a casting drum composed of a Cu-alloy made sleeve and an SUS-made core light in weight, free from the sliding of a fitting part in thermal loading, and long in durable life, in a twin drum type continuous casting drum used for twin drum type continuous casting equipment. SOLUTION: By constituting the SUS made core, which is fitted into a Cu- alloy made sleeve, of ring-shaped cores juxtaposed in the axial direction with a space with one another as a plurality of splitted bodies, the sleeve is movable in the axial direction at the part where the core does not exist, and the relative sliding on the fitting part becomes hard to be caused at the part where the core exists owing to that the length in the axial direction of the fitting part of the sleeve and the core is cut to be short, as a result, enabling the tightening force to be small in fitting of the sleeve and the core, which enables the sleeve to be formed thin.

47. 发明专利

JP2002113557A COOLING ROLL FOR CONTINUOUSLY CASTING THIN CAST SLAB AND CAST SLAB, AND ITS CONTINUOUS CASTING METHOD 失效
公开(公告)号：JP2002113557A
公开(公告)日：2002-04-16
申请号：JP2000306711
申请日：2000-10-05
申请人： NIPPON STEEL CORP
发明人： YAMAMURA HIDEAKI , MIYAZAKI MASAFUMI , KURISU YASUSHI , TAKEUCHI EIICHI , HAMADA NAOYA , IZU TADAHIRO , MIZUCHI ISAO , YAMADA MAMORU
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To provide a cooling roll for manufacturing a thin cast slab without developing surface defect, such as surface crack, crazing, uneven pickling and the crack accompanied with uneven pickling. SOLUTION: On the peripheral surface of the cooling roll, dimples are formed so as to be mutually adjoined through the dimple top parts, and also, on the dimple top part and/or surface, fine projections, fine holes or fine ruggedness, are formed. Desirably, on the above peripheral surface, the dimples having 40-200 μm average depth and 0.5-3 mm diameter corresponding to the circle, are formed so as to be mutually adjoined through he dimple top parts. Further, desirably, on the above dimple surface, the fine projections having 1-50 μm height and 50-200 μm diameter corresponding to the circle, the fine holes having >=5 μm depth and 10-200 μm diameter corresponding to the circle or the fine ruggedness having 1-50 μm average depth and 10-200 μm diameter corresponding to the circle, are formed. Furthermore, on the above dimple top part, the fine projections having 1-50 μm height and 30-200 μm diameter corresponding to the circle are adjacently formed, or the fine holes having >=5 μm depth and 10-200 μm diameter corresponding to the circle, are formed.

48. 发明专利

JP2000280049A TWIN DRUM TYPE CONTINUOUS CASTING METHOD AND DEVICE 失效
公开(公告)号：JP2000280049A
公开(公告)日：2000-10-10
申请号：JP2000015245
申请日：2000-01-25
申请人： NIPPON STEEL CORP
发明人： ODA TAKASHI , IZU TADAHIRO , TSUKAMOTO RYUTA
IPC分类号： B22D11/06 , B22D11/16
摘要： PROBLEM TO BE SOLVED: To prevent a molten metal ooze out and a bulging at a billet end part due to an insufficient solidification while manufacturing the thin billet of homogenous quality in a width direction by uniformalizing a solidification condition in the width direction of the thin billet at a twin drum type continuous casting for manufacturing a thin billet. SOLUTION: A width direction temperature distribution signal of a thin billet S measured by a thermometer 7 is taken into a temperature deviation judging device 9. A sweeping position is specified from a temperature deviation between an average value of the measured temperature in a billet width direction and each of billet width portion and, the indication is transmitted to a control device 11. The device 11 shifts the sweeping device 4 in a drum shaft direction for sweeping an oxidized film on the drum peripheral surface with a rotation brush 45 so as to uniformalize a solidification state by uniformalizing thermal resistance of a drum interface in the drum axial direction.

49. 发明专利

JP2000237847A METHOD AND DEVICE FOR CONTROLLING HEATING TEMPERATURE OF SIDE WEIR 失效
公开(公告)号：JP2000237847A
公开(公告)日：2000-09-05
申请号：JP3970099
申请日：1999-02-18
申请人： NIPPON STEEL CORP
发明人： IZU TADAHIRO , TSUKAMOTO RYUTA
IPC分类号： B22D11/06 , B22D11/04 , B22D11/055
摘要： PROBLEM TO BE SOLVED: To minimize the development of hot band and to produce a sound thin cast slab by optimizing the temp. of a side weir in a twin roll type continuous casting. SOLUTION: In the twin roll type continuous casting for producing the thin cast slab, a side weir temp. control method in which the side weir is divided into vertically two pieces and heated while making the temp. difference between the upper part 2 of the side weir 1 and the lower part 3 of the side weir 1 at the initial stage of the casting, is adopted. Further, the temp. at the lower part 3 of the side weir is higher than the temp. at the upper part 2 of the side weir, and desirably, by heating it at the temp. higher by 100-300 deg.C the solidified shell thickness at the lower part 3 of the side weir is made thin and the heat band caused by penetration of molten metal is restrained.

50. 发明专利

JP2003245756A CONTINUOUS CASTING TUNDISH 审中-公开
公开(公告)号：JP2003245756A
公开(公告)日：2003-09-02
申请号：JP2002047801
申请日：2002-02-25
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI TOMOHIDE , IZU TADAHIRO , KOBAYASHI HIDEAKI
IPC分类号： B22D11/10 , B22D41/00
摘要： PROBLEM TO BE SOLVED: To prevent the occurrence of a defect of a cast slab caused by pouring slag and non-metallic inclusions or the like mixed into molten steel supplied inside a tundish together with the molten steel inside a mold, and to prevent the occurrence of clogging of an immersion nozzle or the like caused by the relatively low temperature molten steel poured first inside the tundish at the start of casting. SOLUTION: In the tundish in which a molten steel entering chamber 3 and a molten steel exiting chamber 4 are separated by a partitioning weir 2 inside the tundish 1, a molten steel flowing-out hole 5 is formed in the lower part of the partitioning weir 2, and at the same time, a refractory cover 6 to seal the molten steel flowing-out hole 5 is mounted on the partitioning weir 2 by a fixture. After the molten steel is once stored in the molten steel entering chamber 3, it flows inside the molten steel exiting chamber 4 overflowing from the partitioning weir 2 and when the fixture is melt, the refractory cover 6 is floated up and the molten steel flowing-out hole 5 is opened. COPYRIGHT: (C)2003,JPO

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