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1. 发明专利

JPH09103849A COOLING ROLL OF THIN SLAB CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH09103849A
公开(公告)日：1997-04-22
申请号：JP26156195
申请日：1995-10-09
申请人： NIPPON STEEL CORP , MISHIMA KOSAN CO LTD
发明人： ARAI TAKASHI , KIRIHARA TADASHI , MIZUCHI ISAO , OKA HIDETAKA , SAITO TATSUKI , TATSUGUCHI TOKU
IPC分类号： B22D11/04 , B22D11/059 , B22D11/06
摘要： PROBLEM TO BE SOLVED: To extend life of a roll and to prevent generation of crack of a slab by efficiently arranging recessed parts of prescribed depth on the peripheral face of a cooling roll of a continuous casting machine to produce a thin slab and preventing deformation and wear of the recessed parts. SOLUTION: In a cooling roll 6 of a continuous casting machine to produce a thin slab, a Ni layer 9 and Co layer 10 of 10-500μm thickness are formed in sequence on the peripheral face of the cooling roll 6, a sum of thickness of the Ni layer 9 and Co layer 10 is 500μm-2mm, recessed parts (d) having 30-150μm average depth are formed on the surface of the Co layer 10.

2. 发明专利

JP2004106010A Side weir for twin roll type continuous casting equipment 审中-公开
公开(公告)号：JP2004106010A
公开(公告)日：2004-04-08
申请号：JP2002271413
申请日：2002-09-18
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： ISAKI HIROSHI , INOUE SHUICHI , OKA HIDETAKA
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To prevent the breakage of a ceramic plate caused by heat stress by reducing an excess heat stress in the ceramic plate caused by molten steel heat during producing a thin cast slab with twin-roll type continuous casting equipment.
SOLUTION: In the twin-roll type continuous casting equipment, in which a molten steel pool part 3 is formed by pushing one pair of side weirs at both end surfaces of one pair of the cooling rolls and a base plate 6 is arranged to the surface facing the molten steel pool part of the side weirs and the ceramic plates 7 is arranged at almost the V-shaped portion along the peripheral edge of the drum of this base plate 6, the excess heat stress in the ceramic plate 7 caused by the molten steel heat in the molten steel pool part 3, is reduced by arranging an air gap 8 on the contacting surfaces of the base plate 6 and the ceramic plate 7 to prevent the breakage of the ceramic plate 7 caused by this heat stress.
COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2001205400A METHOD FOR TWIN-DRUM TYPE CONTINUOUS CASTING OF STRIP AND CASTING DEVICE 失效
公开(公告)号：JP2001205400A
公开(公告)日：2001-07-31
申请号：JP2000017147
申请日：2000-01-26
申请人： NIPPON STEEL CORP
发明人： ARAI TAKASHI , OKA HIDETAKA , TAKEUCHI TOMOHIDE
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To provide a method for moving side ingates for sealing molten metal between a pair of cooling drums when continuously casting a strip from the molten metal by these cooling drums. SOLUTION: The twin-drum type continuos casting of a strip which continuously casts the strip by forming a pouring basin by pressing a pair of side ingates to both flanks of a pair of the rotating cooling drums and cooling the molten metal in the pouring basin by rotating the cooling drums consists in pulling up the side ingates under the conditions under which the relation between the rising speed of the side ingates: Va (mm/min) and a side ingate pushing speed (or the wear rate of side ingate refractoriest: Vb (μm/sec) satisfy Vb/Va

4. 发明专利

JPH0768357A FLAT NOZZLE FOR TWIN ROLL TYPE CONTINUOUS CASTING 失效
公开(公告)号：JPH0768357A
公开(公告)日：1995-03-14
申请号：JP21725193
申请日：1993-09-01
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： KOYAMA TOSHIHIRO , MASUDA TOSHIHIDE , INOUE YUKIO , TSUTSUI KOJI , OKA HIDETAKA , ARAI TAKASHI
IPC分类号： B22D11/06 , B22D41/50 , B22D41/54 , B22D41/60
摘要： PURPOSE:To reduce the variation of meniscus position and to uniformize a cast slab by arranging a flow-straightening refractory having many through-holes at the bottom part of a nozzle and a network body at the upper part thereof and arranging an energized heating electrode at the side wail parts. CONSTITUTION:The network body 3 composed of meltable metal and plural layers and the flow-straightening refractory 4 having many through-holes 4a are included in the bottom part of the outer nozzle 2. The network body 3 gives pressure loss to the molten metal dropped from an inner nozzle 1. The flow-straightening refractory 4 straightens the molten metal flow and the straightened molten metal is uniformly flowed out from a slitting nozzle 5. The energized heating electrode 7 is penetrated before pouring the molten metal and the lower part of the outer nozzle 2 is heated to relax a thermal shock to the outer nozzle 2 and the flow-straightening refractory 4 and prevent the solidification of the molten metal. The through-hole can be manufactured in high accuracy and low cost because the through-holes 4a in the flow- straightening refractory 4 are formed by boring the cheap refractory with a drill, etc.

5. 发明专利

JPH0768352A SIDE WEIR FOR TWIN ROLL TYPE CONTINUOUS CASTING AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH0768352A
公开(公告)日：1995-03-14
申请号：JP21725093
申请日：1993-09-01
申请人： KUROSAKI REFRACTORIES CO , NIPPON STEEL CORP
发明人： TSUKIJI HIDEO , KOYAMA TOSHIHIRO , SHIKITA NOBUO , TSUTSUI KOJI , YAMAGAMI YASUHIRO , YAMADA MAMORU , OKA HIDETAKA
IPC分类号： B22D11/06
摘要： PURPOSE:To make the thermal deformation of a side weir small by fitting a base member planted with a ceramic plate sliding the end surface of a cooling roll to a water cooling type metallic case through monolithic refractory and shrinkable heat insulating material. CONSTITUTION:The base member 12 is arranged to the metallic case 10 and the shrinkable heat insulating material 22 is filled in the expanding part. The monolithic refractory 11 is poured into gap between the metallic case 10 and the member 12. Moisture in the refractory 11 is removed with a drying furnace. At this time, cooling medium is flowed into a cooling medium flowing passage 19 in a stiffening body 16 at the back surface of the metallic case to prevent the deformation of the stiffening body 16. The ceramic plate 13 is stuck to the base member 12. Before starting continuous casting, the side weir 9 is preheated with a heater 14. As the shrinkable heat insulating material 22 is filled into gap between the metallic case 10 and the base member 12, the thermal expansion at the time of drying and preheating is absorbed and the thermal deformation can be restrained.

6. 发明专利

JPH0615414A METHOD AND DEVICE FOR TWIN ROLL CONTINUOUS CASTING 失效
公开(公告)号：JPH0615414A
公开(公告)日：1994-01-25
申请号：JP30340591
申请日：1991-11-19
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： OKA HIDETAKA , ARAI TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To secure sealing effect due to a side dam and further, to prevent the generation of tear-off and burr by controlling the acting position of the side dam during the casting in accordance with the variation of starting position of the biting at the side edge of a cast slab. CONSTITUTION:A lift controller 13 reads the detected data (i) in a biting detector 12 and based on it, the action of the lifting device 11 is controlled and by this action, the side dam 3 is ascended/descended so that the lower end 14 becomes the suitable position. Then, by lift-controlling so as to become the suitable position to the starting position of the biting at the lower end 14 of the side dam 3, the lower end 14 of the side dam 3 is positioned just above the biting start position so as not to leak an unsolidified molten steel and the biting part is stably maintained to form a desired shape. Thus, the biting part is continuously produced with stable small size.

7. 发明专利

JPH05309454A 失效
公开(公告)号：JPH05309454A
公开(公告)日：1993-11-22
申请号：JP31238791
申请日：1991-11-27
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： OKA HIDETAKA , ARAI TAKASHI , MATSUBARA YASUO
IPC分类号： B22D11/06
摘要： PURPOSE:To execute a stable casting by supporting a cast strip in a free loop section from a lower part in a twin roll continuous casting and keeping the supporting force during casting in a prescribed range according to the variation of a projecting quantity. CONSTITUTION:In the twin roll continuous casting, in which the cast strip 3 fed out downward from between the twin rolls constituting a continuous casting mold is horizontally carried with pinch rolls 5 after changing the progressing direction from a downward direction to a sideward direction in the free loop 4 section in the curved cast strip, the cast strip in the free loop 4 section is supported from the lower part with a guide frame 10. The guide frame 10 is moved in a perpendicular plane according to the projecting quantity of the free loop 4 and the supporting force with the guide frame 10 is constituted so as to always keep the force in a prescribed range during casting. By this method, the breakage of the cast strip in the free loop 4 section is prevented and the casting can stably be executed.

8. 发明专利

JPH05228586A TWIN DRUM TYPE STRIP CONTINUOUS CASTING APPARATUS AND CASTING METHOD THEREOF 失效
公开(公告)号：JPH05228586A
公开(公告)日：1993-09-07
申请号：JP3518092
申请日：1992-02-21
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： ARAI TAKASHI , YOSHIMURA YUJI , YAMAGAMI YASUHIRO , OKA HIDETAKA , WAKIYAMA YOICHI , HATTORI HIDENORI
IPC分类号： B22D11/06 , B22D11/16
摘要： PURPOSE:To smoothen the starting, to prevent breakage of a cast strip at weak point caused by shell washing and to obtain the cast strip having the fixed thickness. CONSTITUTION:At a first step from the starting time until a node of the cast strip passes through the narrowest gap in one pair of the drums, the low pressure oil is supplied to a hydraulic cylinder 9 from a pump 25 through a second hydraulic supplying system 52 having an accumulator 51 and elastically weak rolling reduction force is given to one side of the drum from a bearing 7. At a second step until the shell washing does not develop after the rotation of the drum rises, the elastically further intense rolling reduction force is given by using the accumulator 31, too, followable property of the drum is improved and insufficient cooling is prevented. At a stationary third step, the accumulator 31 is shut off by changing over to first hydraulic supplying system 30 and the rolling reduction control is executed so that one side of the drum becomes parallel to the other drum to make the thickness of the cast strip constant.

9. 发明专利

JPH04231149A CONTINUOUS CASTING MACHINE FOR THIN SLAB 失效
公开(公告)号：JPH04231149A
公开(公告)日：1992-08-20
申请号：JP40932190
申请日：1990-12-28
申请人： NIPPON STEEL CORP
发明人： OKA HIDETAKA , SHIMOMURA KENSUKE , ARAI TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent molten metal from leaking as a result of a phenomenon of unsymmetrical wear of a side weir and shortage of seal bearing pressure by providing a supporting device to prevent a pressing down deformation of the side weir in contact with the lower surface of the side weir of a continuous casting machine. CONSTITUTION:At the same time the side weir 2 is maintained by a side weir holding tool 6, its lower end part is kept by a supporting device, further. Therefore, pressed down displacement of the side weir 2 to the lower direction can be prevented by the frictional force produced by the rotation of a cooling drum 1. Further, the generation of a moment around a horizontal shaft parallel with both end faces of the cooling drum 1 can be restrained to the minimum and change of the seal bearing pressure can be eliminated nearly. Consequently, the minimum pressurizing force necessary for sealing the molten metal which is a prescribed seal bearing pressure can always be maintained without receiving the external effect of the frictional force in the side weir 2.

10. 发明专利

JPH04228245A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH04228245A
公开(公告)日：1992-08-18
申请号：JP40808990
申请日：1990-12-27
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： SUDO KATSUZO , YAMAMOTO KEIICHI , KAJIWARA TOMOYUKI , OKA HIDETAKA , ARAI TAKASHI , TSUTSUI KOJI
IPC分类号： B22D11/06
摘要： PURPOSE:To reduce wear of a side dam at the part in contact with end faces of drums and to execute casting for long time in twin drum type continuous casting method. CONSTITUTION:In the continuous casting method for pouring molten metal 4 into space formed with two water cooling drums 1, 1' and two side dams 2, 2' pressed to the end faces of drums, while supplying fused salt 14 as lubricant into recessed parts 13 arranged to the contact face of the side dam and the water cooling drum, the strip is cast.

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