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1. 发明专利

JPS62254953A TWIN ROLL TYPE CONTINUOUS CASTER 失效
公开(公告)号：JPS62254953A
公开(公告)日：1987-11-06
申请号：JP9796786
申请日：1986-04-30
申请人： HITACHI LTD , NISSHIN STEEL CO LTD
发明人： AIZAWA TATSUSHI , ERA MASAYUKI , KIMURA TOMOAKI , NISHINO TADASHI , HASEGAWA MORIHIRO , YAMAUCHI TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To obtain a sheet metal having excellent surface quality without any defects, such as dent, casting wrinkle, hair crack, etc., by arranging the unevenness having the specific depth on a roll surface for twin roll type continuous caster. CONSTITUTION:In case of casting the sheet metal having 1-20mm thickness by the twin roll type continuous caster, the unevenness having 10-200mu depth is arranged on the surface 2 of the roll 1. In this way, the solidified layer developed as bringing into contact with the roll surface is restricted by the uneven roll surface and as the shrinkage according to temp. drop in the solidified layer is occurred among the uneven surface, development of the dent, casting wrinkle, hair crack, etc., is prevented.

2. 发明专利

JPS6264456A CONTINUOUS CASTING DEVICE FOR THIN SHEET OF STEEL 失效
公开(公告)号：JPS6264456A
公开(公告)日：1987-03-23
申请号：JP20493685
申请日：1985-09-17
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： HASEGAWA MORIHIRO , YAMAUCHI TAKASHI
IPC分类号： B22D11/00 , B22D11/06
摘要： PURPOSE:To prevent the wear of side dams provided in contact with both side faces of an internally cooled roll pair and the leakage of steel from said dams by bringing the bottom edges of the side dam,s upper than the narrowest position of the roll pair and supplying a slurry-like material to both side gaps. CONSTITUTION:A pair of the internally cooled rolls 1a, 1b which rotate in the directions opposite from each other are disposed in parallel and a pouring basin is formed by the side dams 2a, 2b in contact with both side faces S. The molten metal therein is continuously cast through a gap between a pair of the above-mentioned rolls 1a, 1b to a thin ingot 4. The bottom edges 6 of the side dams 2a, 2b of the above-mentioned twin roll type continuous casting machine are brought upper than the narrowest position of the rolls 1a, 1b. The slurry-like material 8 is supplied from a nozzle 5 to both side gaps lower than the bottom edges 6.A mixture composed of powder of the oxide, fluoride, nitride, carbide of metal or carbon, etc. and oil is adequate as the above- mentioned material 8.

3. 发明专利

JPH04351250A METHOD FOR CONTINUOUSLY CASTING STRIP 失效
公开(公告)号：JPH04351250A
公开(公告)日：1992-12-07
申请号：JP15094891
申请日：1991-05-28
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： MORIKAWA HIROSHI , HASEGAWA MORIHIRO , YAMAUCHI TAKASHI , KIMURA TOMOAKI , NISHINO TADASHI , HIRANO SATOSHI
IPC分类号： B22D11/06 , B22D11/16
摘要： PURPOSE:To prevent the development of the pattern caused by uneven cooling by measuring surface temp. distribution in a strip continuously coming out in the parallel direction to roll axis and controlling revolution speed of rolls so as to be in the setting range. CONSTITUTION:Molten metal in pouring basin 2 is cooled with a pair of the rolls 1a, 1b to continuously cast the strip 3. The surface temp. of strip 3 is detected with a camera 8 and converted into the digital signal of the temp. with a signal-trestment part 9. This digital signal is received by a control circuit 21 and compared with the setting value and the control circuit instructs a speed controller 22 so as to make slow revolution to a motor 18 in the case it is higher and to make quick revolution to the motor 18 in the case it is lower. Just after starting the casting, the pressing load of the rolls 1a, 1b is measured with load cells 14, 17 and the motor 18 is controlled so that the pressing load becomes the prescribed value or lower, and after becoming the stationry condition, this is switched to the control keeping the surface temp. of strip 3. The strip 3 without having uneven cooling pattern can be produced.

4. 发明专利

JPH03193244A METHOD FOR CONTINUOUSLY CASTING STRIP 失效
公开(公告)号：JPH03193244A
公开(公告)日：1991-08-23
申请号：JP33275589
申请日：1989-12-25
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： YAMAUCHI TAKASHI , HASEGAWA MORIHIRO
IPC分类号： B22D11/06
摘要： PURPOSE:To stably cast a strip having high quality by controlling rotating velocity of rolls in a twin roll strip continuous casting machine so that surface temp. in width direction of the strip produced from gap between roll pair becomes within the set range. CONSTITUTION:In the roll gap fixed type twin roll strip continuous casting machine, the surface temp. of strip 5 is continuously measured with an infrared thermography instrument 6. The detected output of the thermography instrument 6 is inputted to control circuit 7 and then, the inputted value is compared with the set value, and control signal is outputted to casting operation device so as to become the surface temp. of strip 5 within the range of set value and the rotating velocity of rolls is controlled with a control unit 8 for number of revolution of a motor. By this method, the development of cooling uneven pattern on surface of the strip is prevented and the strip having high quality can be stably produced.

5. 发明专利

JPS626740A CONTINUOUS CASTING METHOD FOR THIN SHEET FROM MOLTEN STEEL 失效
公开(公告)号：JPS626740A
公开(公告)日：1987-01-13
申请号：JP14388885
申请日：1985-07-02
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： YAMAUCHI TAKASHI , HASEGAWA MORIHIRO , CHIYUUJIYOU NORIYUKI , KIMURA TOMOAKI , NISHINO TADASHI , AIZAWA TATSUSHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the generation of porosity in an ingot by forming a non-metallic material layer having a specific coefft. of heat transfer on the front circumferential surface of each roll and controlling the rotating speed of the rolls in accordance with the fluctuation of the mutual rolling down forces during the working of the rolls. CONSTITUTION:A pair of internally cooled rolls 6a, 6b which rotate in the directions opposite from each other are disposed in parallel. The thin sheet-like ingot is continuously cast via the space thereof. The front circumferential sur face side R of each roll is constituted of a film consisting of the non-metallic material having .sec. deg.C coefft. of heat transfer and the rear surface side B is formed of a metallic layer 13 consisting of a heat resisting steel, etc. A load cell 24 is provided between the roll 6a and a frame 23 and the roll 6b is connected via a spring 27 to a handle 26. The fluctuation of the rolling down force is detected with the load cell 24 and the rotating speed of the rolls is so controlled as to control the fluctuation within a prescribed range. The generation of the porosity in the ingot is prevented by the above-mentioned method.

6. 发明专利

JPH035048A APPARATUS FOR CONTINUOUSLY CASTING METAL STRIP 失效
公开(公告)号：JPH035048A
公开(公告)日：1991-01-10
申请号：JP13962989
申请日：1989-06-01
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： MORIKAWA HIROSHI , HASEGAWA MORIHIRO , KIMURA TOMOAKI , NISHINO TADASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To regulate flow of molten metal flowing toward gaps between bottom part of long side dams and circular faces of rolls with electromagnetic force by conducting high frequency current to coils set at outer part of both long side dams in a twin roll bype continuous casting machine arranged with the long side dams under non-contacting condition. CONSTITUTION:The coils 9a, 9b are set as long extending toward the same direction as the long side dams 4a, 4b at near gap S of outer part of the long side dams 4a, 4b, and by conducting the high frequency current to these, AC magnetic field is acted to the molten metal in pouring basin. At the same time of generating the AC magnetic field H in the molten metal, on the surface layer part of the solidified shell 18 of the shells 8a 8b formed at the circular surfaces of the rolls, eddy current having reverse phase to the coil current is conducted. By the relative action between the eddy current conducted on this solidified shell surface and the magnetic field A, the electromagnetic force is worked. Therefore, by suitably adjusting the intensity of the electromagnetic force, this is almost equalized with the static pressure of the molten metal penetrated into the gap S or by making this a little higher than the static pres sure thereof, the molten metal flow flowing into the gap S can be controlled.

7. 发明专利

JPS626738A METHOD AND APPARATUS FOR CONTINUOUS CASTING OF THIN SHEET FROM MOLTEN STEEL 失效
公开(公告)号：JPS626738A
公开(公告)日：1987-01-13
申请号：JP14388685
申请日：1985-07-02
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： YAMAUCHI TAKASHI , HASEGAWA MORIHIRO , CHIYUUJIYOU NORIYUKI , KIMURA TOMOAKI , NISHINO TADASHI , AIZAWA TATSUSHI
IPC分类号： B22D11/06
摘要： PURPOSE:To prevent the generation of porosity in an ingot by constituting the circumferential members of rolls in contact with a molten steel with a metallic part and non-metallic part having a specific coefft. of heat transfer and suppressing the thermal shrinkage of a solidified shell in said non-metallic part. CONSTITUTION:A pair of internally cooled rolls 6a, 6b which rotate in the directions opposite from each other are disposed in parallel and a pouring basin 6 of which the base is the circumferential surfaces of the rolls is formed. The rear circumferential surface side B of the circumferential surface part R of the rolls is constituted of a metallic layer 13 consisting of a heat-resisting steel, etc. and the front circumferential surface side R is constituted of a film 14 consisting of a non-metallic material having

8. 发明专利

JPH02179343A METHOD FOR CONTINUOUSLY CASTING STRIP 失效
公开(公告)号：JPH02179343A
公开(公告)日：1990-07-12
申请号：JP32924488
申请日：1988-12-28
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： YAMAUCHI TAKASHI , HASEGAWA MORIHIRO , MORIKAWA HIROSHI , KIMURA TOMOAKI , NISHINO TADASHI
IPC分类号： B21B1/46 , B22D11/06 , B22D11/12
摘要： PURPOSE:To prevent generation of surface crack and surface pattern in a cold- rolled product by specifying surface roughness on circular surfaces of one pair of rolls in contact with molten metal and flattening the rough surface transferred on surface of a strip with hot rolling roll. CONSTITUTION:The circular surfaces of one pair of the cooling rolls 1a, 1b mutually rotating to reverse direction in contact with the molten metal are made to the rough surfaces having 4-50mum in the range of surface roughness Ra. The strip 4 passed through gap between a pair of the rolls 1a, 1b is continuously passed through the light rolling reduction hot-rolling rolls 5a, 5b during keeping this to the hot temp. and the rough surface transferred on the strip surface is flattened with these rolls 5a, 5b. By this method, the generation of surface crack and surface pattern in the cold-rolled product caused by uneven cooling at the time of developing the solidified shell are prevented and the good quality strip can be produced at high yield.

9. 发明专利

JPH02108443A TWIN ROLL TYPE SHEET METAL CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH02108443A
公开(公告)日：1990-04-20
申请号：JP26154588
申请日：1988-10-19
申请人： HITACHI LTD , NISSHIN STEEL CO LTD
发明人： SHIDARA HISAHIRO , YABUKI TAKASHI , HOSHINO KAZUO , HASEGAWA MORIHIRO , YAMAUCHI TAKASHI
IPC分类号： B22D11/06
摘要： PURPOSE:To enable the stable operation by arranging a part of side dam having projected shape within roll width and sending the side dam to casting direction at the prescribed velocity while grinding the part of the side dam brought into contact with the outer circumferential face of the roll with the outer circular surface of the rotated roll. CONSTITUTION:As a part of the side dam 2 surface is arranged as the projecting shape within the roll width, by descending a chain 3 holding the side dam, the contacting surface of the side dam 2 with the outer circular surface of the roll 1 is directly ground with the roll side. Therefore, penetration of the molten metal is difficult to develop at the gap of contacting surface between the outer circular surface of the roll and the surface of the side dam, and also by grinding action, the contacting surface can be maintained to renew. By a holding device arranged at each pitch to the endless circulating chain, an assembling device for new side dam and a takeout introducing device for old side dam, continuous supply of the side dam is executed at each pitch. As the following side dam is pushed in the side dam with a pinch roller 8 during using to casting, the gap is difficult to develop, and the penetration of the molten metal is not developed, and the stable operation can be executed.

10. 发明专利

JPH01271037A METHOD FOR CASTING STRIP BY TWIN ROLL TYPE CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH01271037A
公开(公告)日：1989-10-30
申请号：JP9933288
申请日：1988-04-23
申请人： NISSHIN STEEL CO LTD , HITACHI LTD
发明人： YAMAUCHI TAKASHI , HASEGAWA MORIHIRO , AKIYAMA RYUICHI , YABUKI TAKASHI
IPC分类号： B22D11/06 , B22D11/16
摘要： PURPOSE:To improve the surface quality of a strip by constituting sealed case member with a transparent plate and controlling atmosphere in the sealed case while observing molten metal surface with a camera. CONSTITUTION:Pouring basin part 2 is formed on the circular surface of one pair of inner part cooled rolls 1a, 1b, and the sealed case 3 for covering the part thereof is arranged. Then, the upper face of the ease 3 is constituted with the transparent plate 5 and the video camera 8 is arranged at the upper part thereof. In the sealed case 3, the gas blowing pipes 7 having slit-like opening hole along axial direction are horizontally arranged. At the time of continuous casting, the molten metal surface is observed with the camera 8, and in a case of detecting the development of scum or solidified. piece, the sealed gas of the blowing pipe 7 is controlled, to execute adjustment of the pouring basin 2. By this method, ae the casting can be executed while always maintaining the molten metal surface under clean condition, the development of the surface defect of the strip is prevented. Therefore, the surface quality of the strip is improved.

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