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61. 发明专利

JPS595057B2 JPS595057B2 - 失效
公开(公告)号：JPS595057B2
公开(公告)日：1984-02-02
申请号：JP7834779
申请日：1979-06-21
申请人： Nippon Steel Corp
发明人： OOHASHI TETSUO , FUJII HIROMU , TAKEUCHI EIICHI , KIMURA KAZUSHIGE , TANNO HITOSHI
IPC分类号： B01F13/08 , B22D11/10 , B22D11/115 , B22D27/02
CPC分类号： B22D11/115

62. 发明专利

JPS564363A CONTINUOUS CASTING METHOD OF SLAB 失效
公开(公告)号：JPS564363A
公开(公告)日：1981-01-17
申请号：JP7806279
申请日：1979-06-22
申请人： NIPPON STEEL CORP
发明人： OOKUBO YOSHIO , MURAKAMI TADASHI , TANNO HITOSHI
IPC分类号： B22D11/128 , B22D11/04 , B22D11/16
摘要： PURPOSE:To decrease the cracking of a slab by applying compressive force through light screw-down to the slab in its lengthwise direction near its horizontal leveling area and applying the screw-down in the width direction and the broadside screw- down restraining the top and bottom surfaces near the horizontal leveling point in the curved type continuous casting. CONSTITUTION:For example, a slab 9 having unfrozen portions is lightly screwed down by horizontal drive rolls 10 of nearly the same speed as the casting speed in front of the horizontal leveling point and is given compressive action in its lengthwise direction by brake rolls 11 of a slower speed behind the horizontal leveling point. Also, the screw-down in the width direction and compressive force in the lengthwise direction within a range of the broadside screw-down are applied by die rolls 12 near the horizontal leveling point. The die rolls 12 are of a plurality consisting of drive rolls 12a, 12c and control rolls 12c. In order to prevent the occurrence of buckling in the slab 9, the horizontal rolls 14 restraining its top and bottom surfaces are provided. At this time, the die rolls 12 and horizontal rolls 14 are so disposed that the die axis of the former aligns to the horizontal axis of the horizontal rolls 14, to apply no screw-down to the horizontal rolls 14.

63. 发明专利

JPS564362A CONTINUOUS CASTING METHOD OF SLAB 失效
公开(公告)号：JPS564362A
公开(公告)日：1981-01-17
申请号：JP7806179
申请日：1979-06-22
申请人： NIPPON STEEL CORP
发明人： OOKUBO YOSHIO , MURAKAMI TADASHI , TANNO HITOSHI
IPC分类号： B22D11/128 , B22D11/04 , B22D11/16
摘要： PURPOSE:To reduce the cracking of a slab by acting compressive force in its lengthwise direction near at least the horizontal leveling area and applying drawing force in the width direction near the horizontal leveling point in the curved type continuous casting. CONSTITUTION:Horizontal drive rolls 10 of a speed nearly coinciding with the casting speed are provided in front of the portion near the horizontal leveling point of e.g. a slab 9 having unfrozen portions and brake rolls 11 of a speed slower than the casting speed are provided behind the portion near the horizontal leveling point, to apply compressive action in the lengthwise direction to the slab between these rolls. In addition, the drawing force in the width direction is applied to the slab by three pairs of broadside vertical rolls 12 near the horizontal leveling point. The vertical rolls 12a, 12b are drive rolls which are the same in speed as the horizontal drive rolls and the vertical rolls 12c are brake rolls of a low speed which apply drawing force dividedly at plural positions. The leveling strain with low-head casting is relieved by the synergistic effect of the compressive action in the lengthwise direction of the horizontal rolls 10, 11 and the lateral screw-down action and compressive action in the width direction of the vertical rolls 12.

64. 发明专利

JPS564354A CONTINUOUS CASTING METHOD OF STEEL 失效
公开(公告)号：JPS564354A
公开(公告)日：1981-01-17
申请号：JP7834879
申请日：1979-06-21
申请人： NIPPON STEEL CORP
发明人： OOHASHI TETSUO , FUJII HIROMU , TAKEUCHI EIICHI , KIMURA KAZUSHIGE , TANNO HITOSHI
IPC分类号： B01F13/08 , B22D11/10 , B22D11/115 , B22D27/02
摘要： PURPOSE:To minimize the upward flow owing to the collision of electromagnetic flow against the wall surfaces of the mold and stabilize the electromagnetic flow by approaching the positions of the linear motors which give electromagnetic flow to the freezing interface molten steel to the molten metal surface in the mold in order to form the sound frozen layer of a suitable thickness to the slab. CONSTITUTION:Linear motors 3 are provided along both long sides 2 in a slab mold 1 and their thrust is given in the mutually different directions 4, 4'. Electromagnetic flow 5 is thus given to the freezing interface molten steel up to the position where the frozen thickness corresponding to the scale thickness formed from at least during casting until the start of rolling. At this time, the installation positions of the linear motors 3 are approached as close to the molten metal surface 6 in the mold as possible within the range where the frozen layer of more than this scale thickness may be formed. As a result of this, the flow generated on the wall surface side of the long sides 2 of the mold collides against the wall surfaces of the adjacent short sides 9 and the upward flow out of the components going toward the long sides on the opposite side and those divided to the top and bottom may be suppressed. Hence, no large turbulence occurs in the molten metal surface powder 8.

65. 发明专利

JPS55158860A CONTINUOUS CASTING METHOD OF STEEL SLAB 失效
公开(公告)号：JPS55158860A
公开(公告)日：1980-12-10
申请号：JP6576879
申请日：1979-05-28
申请人： NIPPON STEEL CORP
发明人： OOHASHI TETSUO , FUJII HIROMU , KIMURA KAZUSHIGE , TANNO HITOSHI , TAKEUCHI EIICHI
IPC分类号： B22D11/10 , B22D11/103 , B22D11/115
摘要： PURPOSE:To enable the continuous casting of undeoxidized steel stably and reduce the formation of surface flaws by making the distance between the long sides of the mold nozzle more than the effective thickness of electromagnetic flow. CONSTITUTION:Linear motors 3 for giving electromagnetic flows respectively are installed along both long sides 2 of a slab mold 1. These are so arranged that the thrust thereof are given in mutually different directions 4, 4', whereby continuous electromagnetic flow 5 is given to the freezing interface. At this time, the spacing 7 between the mold long sides 2 and molten metal pouring immersion nozzle 6 is assured at above the effective thickness of the electromagnetic flow. Thereby, the smoothness of the electromagnetic flow within a velocity-of-flow range is insured and the electromagnetic flow which does not disturb the powder on the molten metal surface is stably obtained. Hence, the continuous casting of undeoxidized steel becomes stably possible.

66. 发明专利

JPS54160522A CUTTING DEVICE IN CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPS54160522A
公开(公告)日：1979-12-19
申请号：JP6891978
申请日：1978-06-09
申请人： NIPPON STEEL CORP
发明人： KAMEYAMA KAZUHIDE , TANNO HITOSHI
IPC分类号： B22D11/12 , B22D11/126 , B23K7/00
摘要： In a continuous-casting machine, a device for cutting a casting synchronously with the traveling speed of the casting is mounted above a conveyor table extending horizontally beyond casting withdrawal guide rollers. The cutting device has a temperature maintaining cover that covers the casting on the conveyor table, moving with the cutting device proper along the conveyor table.

67. 发明专利

JPH10113751A MOLD FOR CONTINUOUS CASTING AND CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH10113751A
公开(公告)日：1998-05-06
申请号：JP28730996
申请日：1996-10-11
申请人： NIPPON STEEL CORP
发明人： TANNO HITOSHI
IPC分类号： B22D11/16 , B22D11/04 , B22D11/05 , B22D11/055
摘要： PROBLEM TO BE SOLVED: To stably produce a cast slab having good surface characteristic in a high speed casting by equipping an actuator for controlling the surface characteristic of long sides of a mold contacting with the cast slab to a cooling box. SOLUTION: The actuator 7 is fixed to a mold frame 8 demarcating the outer wall of the mold 1 and this stroke part 7a is fixed to the back surface of a buffer plate 3 by penetrating the cooling box 4. The actuator 7 is constituted with few sets of hydraulic cylinders, and the one that the stroke can be controlled e.g. at ±0.01mm accuracy, is adjusted. Further, on a copper plate 2 of the long side of the mold, a thermocouple for detecting the surface temp. is arranged, and the stroke of the hydraulic cylinder 7 is controlled based on the detecting signal of the thermocouple. By this method, the expansion of the mold to the cast slab side near a meniscus is controlled and the mold form according to the solidified shrinkage of the cast slab is obtd., and the powder functioning as a lubricant is stably supplied and the cast slab having good surface characteristic is obtd.

68. 发明专利

JPH08281381A MOLD FOR HORIZONTAL CONTINUOUS CASTING 失效
公开(公告)号：JPH08281381A
公开(公告)日：1996-10-29
申请号：JP8159695
申请日：1995-04-06
申请人： NIPPON STEEL CORP
发明人： TANNO HITOSHI , ICHIYAMA YASUTOMO , OGAWA TAKESHI , KAWAI HIROYUKI , ASO TOSHIRO
IPC分类号： B22D11/04 , B22D11/059
摘要： PURPOSE: To prevent hoot tear and clod shut crack at the defects of a steel by forming a specific metal-base thermal-sprayed film from the starting pt. of solidified shell developed on an inner surface at the end part of a copper alloy-made cylindrical mold contacting with molten steel approaching to a brake ring to the other end side of the mold. CONSTITUTION: The copper alloy-made cylindrical mold 7 forms the metal-base thermal-sprayed film 9 of 0.1-10.0mm thickness excellent in heat shock resistance, zinc resistance and wear resistance on the inner surface at the end part of the brake ring side. This metal-base film 9 is formed so as to satisfy the relationship I to the position from the starting position fo solidified shell developed on the inner surface at the end part of the mold 7 to the other end side of the mold 7. Wherein, (d) is the film thickness at 0.1-10.0mm, K is thermal conductivity (kcal/m.hr. deg.C) and L is the film length (mm) from the starting pt. of solidification. Further, as the metal-base thermal sprayed film 9, Co-base alloy, etc., is suitable and inn order to secure the sticking force of the copper alloy forming the mold with these alloy, it is effective to interpose an Ni-plating film.

69. 发明专利

JPH0881750A THERMAL SPRAYING METHOD TO CASTING MOLD FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH0881750A
公开(公告)日：1996-03-26
申请号：JP24343394
申请日：1994-09-13
申请人： NIPPON STEEL CORP
发明人： HAMAYA HIDEKI , ICHIYAMA YASUTOMO , KUROKI MASATSUGU , SHIMA TETSUO , TANNO HITOSHI , OBARA MASAHIRO , YURIOKA NOBUTAKA , KITAGUCHI SABURO , KASAI YOSHINORI
IPC分类号： C23C4/02 , B22D11/04 , B22D11/059 , C23C4/06 , C23C28/02
摘要： PURPOSE: To provide a thermal spraying method to a casting mold and more particularly to its long sides which are high in adhesion and films of which do not peel off even if a fusing treatment is not carried out after the thermal spraying. CONSTITUTION: Ni electroplating is formed at a thickness of 0.1 to 2mm in a part or the whole of the surfaces of the casting mold consisting of copper or copper alloy and thereafter, the plating surfaces are subjected to a blasting treatment of roughness Ra=2 to 4. An Ni-based self-fluxing alloy is then thermally sprayed at thickness of 0.1 to 0.6mm thereon. The components of the Ni-based self-fluxing alloy are composed of Ni=60 to 80%, Cr=8 to 33%, B=1.5 to 5%, Si=2 to 6%, C=0.3 to 1.5%, Fe=2 to 4% and the balance impurities. Thermal spraying is executed by flame thermal spraying utilizing oxygen/ kerosene at a flame speed of 1300 to 2300m/s. The surface of the Ni-based self-fluxing alloy after the thermal spraying is finished to Rmax=1.6 to 6.3S.

70. 发明专利

JPH0871707A COATING BELT FOR BELT TYPE CONTINUOUS CASTER 失效
公开(公告)号：JPH0871707A
公开(公告)日：1996-03-19
申请号：JP21583694
申请日：1994-09-09
申请人： NIPPON STEEL CORP
发明人： TANNO HITOSHI , MATSUO SHINJI , KOMORI TOSHIYA , SAITO TATSUKI , NAKAMURA SHIYUUJI
IPC分类号： B22D11/04 , B22D11/059 , B22D11/06
摘要： PURPOSE: To prevent peeling of heat insulating layer and sticking of fusion coating material to heat insulating layer. CONSTITUTION: In the coating belt for belt type continuous caster, in which a heat insulating layer and fusion coating layer are formed on a metal mode belt main body, the belt main body consists of a cooling side belt main body 1 and molten steel side belt main body 2, a heat insulating layer 3 is formed between the cooling side belt main body 1 and molten steel side belt main body 2 as closely adhered, further, a fusion coating layer 4 is formed on the surface of molten steel side of molten steel side belt main body 2. Peeling of the heat insulating layer 3 from the cooling side main belt and sticking of a fusion coating material to the heat insulating layer are prevented. As a result, heat extracting by mold is uniformly kept in long term, a thin cast slab is can be produced.

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