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1. 发明专利

JPH07284883A TWIN ROLL TYPE CONTINUOUS CASTER 失效
公开(公告)号：JPH07284883A
公开(公告)日：1995-10-31
申请号：JP7499694
申请日：1994-04-13
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： ARAI TAKASHI , OKA HIDETAKA , WAKIYAMA YOICHI
IPC分类号： B22D11/04 , B22D11/059 , B22D11/06
摘要： PURPOSE:To prevent generation of crack on a coating layer and the leakage of molten metal and to produce a good cast slab by forming the coating layer on the surface over the peripheral surface and the end surface from the peripheral surface edge of a cooling roll. CONSTITUTION:The coating layer 20 is formed so as to coat the surface over the peripheral surface 2a and the end surface 2b from the edge 2c of the peripheral surface of the cooling roll. Therefore, the part of the edge 2e of peripheral surface of the coating layer 20 is firm, and even if the peripheral surface 2a of the roll is brought into contact with the high temp. molten metal during casting and expanded and the flange part 2f of the roll is thermally deformed causing to intensely and slidingly bring the edge 2e of the peripheral surface of the coating layer into contact with a side weir 3, the crack and the peeling are not generated on the coating layer 20. By this method, the leakage of the molten metal can be prevented.

2. 发明专利

JPH06297110A COOLING DRUM FOR CONTINUOUSLY CASTING CAST STRIP AND ITS MANUFACTURE 失效
公开(公告)号：JPH06297110A
公开(公告)日：1994-10-25
申请号：JP8879493
申请日：1993-04-15
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： TANAKA SHIGENORI , MIZUCHI ISAO , YAMAJI CHIHIRO , YAMAMOTO KEIICHI , WAKIYAMA YOICHI
IPC分类号： B22D11/06 , C23C14/06 , C23C14/14
摘要： PURPOSE:To improve the stickness of a plating layer and the service life index of a cooling drum by forming a specific size of dimples on the surface of the roll for continuous casting and arranging a hard plating layer having the specific thickness and hardness on the surface layer having the dimples. CONSTITUTION:On the surface of the cooling roll 1 for continuous casting, the dimples 5 having 0.1-0.8mm diameter and 5-50mum depth are formed, and on the surface of the dimples, a hard plating layer 4 having 1-50mum thickness and >=500Hv hardness is formed. Further, under this hard plating layer, an under layer of Ni plating layer 3 is formed. Then, the cooling drum is used in the gaseous nitrogen atmosphere. By this constitution, the service life index of the cooling drum is improved, and by using gaseous N2, nitride is formed in the hard plating layer and the wear resistance is improved, and the service life index is further improved.

3. 发明专利

JPH06277807A TWIN ROLL CONTINUOUS CASTING METHOD AND ITS APPARATUS 失效
公开(公告)号：JPH06277807A
公开(公告)日：1994-10-04
申请号：JP32765391
申请日：1991-12-11
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： ARAI TAKASHI , OKA HIDETAKA , WAKIYAMA YOICHI , HATTORI HIDENORI
IPC分类号： B22D11/06
摘要： PURPOSE:To provide a twin roll continuous casting method and its apparatus, in which bias wear of a side weir is effectively prevented, in the pressing method of the side weir to the end surfaces of cooling rolls in the twin roll continuous casting. CONSTITUTION:In the twin roll continuous casting method synchro-nously displacing three pressing force loading on members 4a-4c for loading the pressing force on the total three positions of one position at the lower part and two positions at the upper part in the back surface of the side weir 3 at the fixed velocity in the pushing direction, in the range of satisfying the relational inequality 0.8A

4. 发明专利

JPH06154958A TWIN ROLL TYPE CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH06154958A
公开(公告)日：1994-06-03
申请号：JP31198792
申请日：1992-11-20
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： FUKUDA YOSHIMORI , OKA HIDETAKA , YAMADA MAMORU , ARAI TAKASHI , MIYAZAKI MASAFUMI , WAKIYAMA YOICHI , TERADO SADAMU
IPC分类号： B22D11/06 , B22D11/18
摘要： PURPOSE:To prevent generation of a crack, a wrinkle, waviness, etc., of an ingot, and to prevent unevenness of plate thickness in the widthwise cross section direction by executing moving control of a pair of baffleplates, based on the temperature of a molten metal and the detection value of plate thickness of a sheet. CONSTITUTION:Plate thickness of an ingot 11 is measured by a plate thickness gauge 13 of an X-ray transmission device, etc., installed right under cooling rolls 2, 3. A molten metal temperature between baffleplates 8, 9 and the cooling rolls 2, 3 is measured by a temperature sensor 22. This detected temperature signal is subjected to arithmetic processing by a controller 19, and dipping depth in each molten metal of the baffleplates 8, 9, a distance from cooling roll outside peripheral surfaces 2a, 3a to the baffleplates 8, 9, or a gap in the left and the right of the cooling rolls by turning in the horizontal direction are varied, and controlled so that a temperature of the molten metal is equalized.

5. 发明专利

JPH06335753A METHOD FOR RECOMBINING DRUM ASSEMBLY 失效
公开(公告)号：JPH06335753A
公开(公告)日：1994-12-06
申请号：JP12701393
申请日：1993-05-28
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： SASAKI KUNIMASA , WAKIYAMA YOICHI
IPC分类号： B22D11/06
摘要： PURPOSE:To provide a recombining method, by which an exclusive truck for recombining the roll assembly and a rail are unnecessary, in twin roll type continuous casting equipment. CONSTITUTION:When the recombination of a drum assembly 1 comes to be necessary caused by the wearing of a water cooling roll 51, etc., of the drum assembly 1, after hanging and removing a tundish 80 with an overhead crane, the drum assembly 1 is hung with a ladle crane 30 through a hanging beam 7 and removed from a frame 5 and loaded on a ladle truck 40 and carried out. The drum assembly 1 already finishing the maintenance is loaded on a ladle truck 41 and carried and hung with the ladle crane 30 and arranged to a specific position.

6. 发明专利

JPH06328205A COOLING ROLL IN METAL STRIP CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH06328205A
公开(公告)日：1994-11-29
申请号：JP14250693
申请日：1993-05-24
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： YAMAJI CHIHIRO , ARAI TAKASHI , MIYAZAKI MASAFUMI , WAKIYAMA YOICHI , SASAKI KUNIMASA
IPC分类号： B22D11/04 , B22D11/055 , B22D11/06
摘要： PURPOSE:To provide a cooling roll, in which cooling roll profile is kept to a prescribed shape and a good quality metal strip is obtd., in a twin roll type continuous casting apparatus for producing the metal strip. CONSTITUTION:The cooling roll 1 is divided into three sections of A, B and C in the axial direction of the roll and in the cooling grooves 2a, 2b, 2c arranged near the roll surface, the cooling grooves 2a, 2c in the sections A, C positioned at the end parts are made to have the same distance from the roll surfaces. The cooling groove 2b in the section B positioned at the center part of the roll is made to have the distance from the roll surface shorter than these of the cooling grooves 2a, 2c to make the cooling capacity of the roll surface at the center part high. By controlling the thermal deformation of the cooling roll surface to keep the roll profile to the prescribed shape, the uniform rolling reduction force is applied to over the whole width in the solidified shell, and the generation of the defect, such as crack, wrinkle in the cast strip is prevented.

7. 发明专利

JPH06591A TWIN DRUM TYPE CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH06591A
公开(公告)日：1994-01-11
申请号：JP10827292
申请日：1992-04-28
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： TANAKA KISABURO , TERADO SADAMU , WAKIYAMA YOICHI
IPC分类号： B08B1/04 , B22D11/06 , B22D11/16
摘要： PURPOSE:To press a brush roll on a cooling drum with a fixed pressure and to uniformly remove the soiling on the surface of the cooling drum by measuring the variation in repulsion between a cooling drum shaft and a brush roll intermediate shaft and slidingly moving the intermediate shaft according to the variation. CONSTITUTION:The brush roll intermediate shaft 16 is held on a slide shaft 22 so as to be slidable, and by a load cell 20 arranged between the cooling drum shaft 2 and the brush roll intermediate shaft 16, the reaction between both is measured. By driving a motor 21 for controlling according to the variation of the reaction, the intermediate shaft 16 is slidingly moved to the position making the repulsion constant. This repulsion is varied both in an instantaneous value and a long-term average value by heat expansion, etc., in the part of rotating vibration of the brush roll but the deviation is controlled by comparing the long-term average value with the reference value. Thus, by pressing with a power cylinder 30 to the instantaneous variation, and by controlling with slidingly movement of the intermediate shaft 16 to the variation of the long- term, the good cast strip is stably produced.

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

JPH05228585A DEVICE FOR REMOVING SCUM IN STRIP CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH05228585A
公开(公告)日：1993-09-07
申请号：JP3328292
申请日：1992-02-20
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： SASAKI KUNIMASA , WAKIYAMA YOICHI , MIZUCHI ISAO , FUKUDA YOSHIMORI
IPC分类号： B22D11/06 , B22D11/10 , B22D11/11 , B22D11/112 , B22D11/116
摘要： PURPOSE:To eliminate defect of surface flaw, etc., in a cast strip by sticking and removing scum floated on molten metal surface to a wire rod enabling supplement and cutting. CONSTITUTION:The wire 6 is projected to tip part of a guide nozzle 1 and dipped into the molten metal 61. Then, a carriage 2 mounting the guide nozzle 1, wire supplying machine 3, pinch rolls 4 and straightening rolls 5 is reciprocated between side weirs 52 by a hydraulic cylinder 8. Then, the scum 63 floated on the molten metal 61 is stuck and removed to the wire 6. When the scum 63 stuck to the projecting part of the wire 6 becomes large, the carriage 2 is ascended every base plate 7 by a hydraulic cylinder 9, and the tip part of the guide nozzle 1 is shifted to the outside of molten metal storage part and the wire 6 is cut and removed by a cutter 11, and the following scum removing work is again executed by supplying the consumed wire 6.

10. 发明专利

JPH03118946A BRUSHING DEVICE FOR CONTINUOUS CASTING DRUM 失效
公开(公告)号：JPH03118946A
公开(公告)日：1991-05-21
申请号：JP25528389
申请日：1989-10-02
申请人： NIPPON STEEL CORP , MITSUBISHI HEAVY IND LTD
发明人： TANNO HITOSHI , YAMAGAMI YASUHIRO , HAYASHI KANJI , WAKIYAMA YOICHI
IPC分类号： B22D11/06
摘要： PURPOSE:To uniformize thickness of stuck material on drum surface and to continuously cast a steel strip having high quality by inclining rotating axis of a brush for removing the stuck material on the drum surface to rotating axis of the drum at the time of continuously casting the steel slab having strip shape from molten steel with twin drum type using the cooling drums having hourglass shape in cold state. CONSTITUTION:Two cooling drums 1, 2 are rotated mutually to reverse direction, and molten steel is poured into gap between both drums and the continuously cast strip from between both drums is pulled out. In this case, surface of pouring basin part 3 at center of the drums 1, 2 is bulged to outside as shown with the chain line 7 caused by heating of the molten steel, and interval between both drums 1, 2 is made to small at the center part and thickness of the continuously cast strip is made to uneven in the width direction. As the stuck material on the drum is formed to the same shape, shape of the drum 1, 2 at cold-state is formed as the hourglass having the concave shape at the center part and at the same time, the rotating axis of columnar rotating brushing roll 5, 6 for removing the stuck material is inclined to the rotating axis of drum, and by making this angle adjustable, the stuck material face on the drum surface is flattened and the thickness of continuously cast strip is uniformized in the width direction.

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