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101. 发明专利

JPH0464779B2 失效
公开(公告)号：JPH0464779B2
公开(公告)日：1992-10-16
申请号：JP24188487
申请日：1987-09-25
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI EIICHI , MAEDE HIROFUMI , WADA KANAME
IPC分类号： B22D11/00 , B22D11/10 , B22D11/103 , B22D11/115

102. 发明专利

JPH03294045A APPARATUS FOR CONTINUOUSLY CASTING HOLLOW CAST BILLET 失效
公开(公告)号：JPH03294045A
公开(公告)日：1991-12-25
申请号：JP9312890
申请日：1990-04-10
申请人： NIPPON STEEL CORP
发明人： HARADA HIROSHI , TAKEUCHI EIICHI , FUJI TAKEHIKO
IPC分类号： B22D11/00 , B22D11/04 , B22D11/041 , B22D11/055
摘要： PURPOSE:To improve surface quality of a cast billet by holding molten metal in pouring basin, non-cooling and cooling molds in a continuous casting apparatus for the hollow cast billet to temp. of the liquidus or higher. CONSTITUTION:In the continuous casting apparatus for hollow cast billet providing the pouring basin 11 opening as widening upward, the cooling mold 18, non-cooling mold 15 and a columnar core 24 set below the pouring basin, and from which the hollow cast billet P is drawn from thr cooling mold 18 while supplying the molten metal M into the cooling mold 18 from the pouring basin 11, an induction heating device 33 for holding the temperatures of the pouring basin 11, the non-cooling mold 15 and the molten metal M in the pouring basin 11 and the non-cooling mold 15 to the temp. of the liquidus or higher is provided. By this method, as the solidified shell is grown from only inner diameter side of the cast billet in contact with the columnar core, the hollow cast billet having good surface characteristic without developing segregation can be produced.

103. 发明专利

JPH02247048A MANUFACTURE OF METAL MATERIAL HAVING HIGH CRACKING SENSIBILITY 失效
公开(公告)号：JPH02247048A
公开(公告)日：1990-10-02
申请号：JP6871489
申请日：1989-03-20
申请人： NIPPON STEEL CORP
发明人： MIYAKE MITSUO , TAKEUCHI EIICHI
IPC分类号： B22D11/04 , B22D11/00
摘要： PURPOSE:To enable production of a metal material having high cracking sensibility to hot rolling and hot extruding can be executed by producing a combined cast billet covering the metal material having high cracking sensibility with a metal material having excellent workability with a horizontal continuous casting. CONSTITUTION:In a vessel 1a, the molten metal 3 having easy-to-work and in a vessel 1b, the molten metal 4 having high cracking sensibility are poured, respectively. The molten metal 3 is introduced in a mold 5 through a pouring hole 1d and solidified shell 11 is formed at inner face to be the outer layer 7b of the cast billet 7. The molten metal 4 is poured into unsolidified part in the cast billet 7 from outlet through a pouring tube 6 and cooled and solidified to be the inner layer 7a of the cast billet 7 and the combined cast billet is cast with the horizontal continuous casting. In the cooling and solidifying process of the molten metals 3, 4, as the flow of the molten metal 3 poured from the pouring hole 1d and the molten metal 4 poured from the pouring tube 6 are restricted at a static magnetic field zone 9, mutual mixture is restrained. By this method, the combined cast billet is obtd., and by executing hot working to this, spreading material having good surface characteristic is obtd.

104. 发明专利

JPS63238969A DEVICE FOR ADJUSTING TRANSFER SPEED OF MOLTEN METAL 失效
公开(公告)号：JPS63238969A
公开(公告)日：1988-10-05
申请号：JP6912987
申请日：1987-03-25
申请人： NIPPON STEEL CORP
发明人： MATSUZAWA KEIICHIRO , KANAI NORIYUKI , MAEDA KATSUHIRO , TAKEUCHI EIICHI , WADA KANAME
IPC分类号： B22D11/10 , B22D11/103 , B22D37/00
摘要： PURPOSE:To improve the braking efficiency of a molten metal flow by providing a DC magnetic field generating device for molten metal flow, arranging a pair of electrodes in the orthogonal direction to the molten metal flow and magnetic field and installing a short circuit between electrodes. CONSTITUTION:Electromagnets 4a, 4b are arranged as the DC magnetic field generating device impressing magnetic field vertically on the flow path 2 of a molten metal 1 and a pair of electrodes 5a, 5b are arranged as well so as to be orthogonal with the molten metal flow and the direction of the magnetic field on the both side walls of the flow path 2. Both ends of the electrodes 5a, 5b are also connected by the short circuit 6 of the external part. A variable resister 7 is provided on the short circuit 6, if necessary. Since the current generated at the inner part of the flow path 2 thus forms the closed circuit passing the external path of the flow path 2 the braking force in the opposite direction of the molten metal flow is effectively acted on the molten metal 1 inside the flow path. Consequently the braking efficiency of the molten metal flow is improved.

105. 发明专利

JPS63108947A CONTINUOUS CASTING METHOD FOR COMPLEX STEEL 失效
公开(公告)号：JPS63108947A
公开(公告)日：1988-05-13
申请号：JP25289886
申请日：1986-10-24
申请人： NIPPON STEEL CORP , HAMADA JUKO
发明人： TAKEUCHI EIICHI , WADA KANAME , ANDO KENZO
IPC分类号： B22D11/00 , B22D11/10 , B22D11/11 , B22D11/112 , B22D11/115 , B22D11/116
摘要： PURPOSE:To continuously cast a complex steel having a little mixture between the layer and clean boundary by supplying different kinds of metals at upper and lower parts of traversed static magnetic field having a distance from the molten surface in a mold under relation of the specific equation about thickness of solidified surface layer, drawing velocity and solidified velocity of cast slab. CONSTITUTION:Magnets 8 are arranged at the position, which the distance (l) toward casting direction from the molten surface in the mold 1 has relation of the equation to the thickness (d) f solidified surface layer, the drawing velocity (v) and the solidified velocity (f) in the slab 9 and the static magnetic field 10 traversing whole width of cast slab 9 is formed. The molten metal for forming the surface layer is supplied above the static magnetic field 10 by a submerged nozzle 2 and the molten metal for forming the inner layer is supplied below the static magnetic field 10 by a submerged nozzle 3. By suitably controlling the balance of each supplied rate, the fluidity of the molten metal is braked at the magnetic force part 10 and the lower part supplied metal shell is solidified at inside of the upper part supplied at inside of the upper part supplied metal shell 5 on the surface layer. By restraining the mixture between layers to the min., the complex steel 9 having clean boundary is continuously cast.

106. 发明专利

JPS5924903B2 JPS5924903B2 - 失效
公开(公告)号：JPS5924903B2
公开(公告)日：1984-06-13
申请号：JP11603079
申请日：1979-09-10
申请人： Nippon Steel Corp
发明人： OOHASHI TETSUO , FUJII HIROMU , KITAMURA OSAMU , MINEYUKI SEIZO , TAKEUCHI EIICHI
IPC分类号： B01F13/08 , B22D11/10 , B22D11/11 , B22D11/115 , B22D27/02
CPC分类号： B22D11/11 , B22D11/115

107. 发明专利

JPS5852456B2 JPS5852456B2 - 失效
公开(公告)号：JPS5852456B2
公开(公告)日：1983-11-22
申请号：JP13577678
申请日：1978-11-06
申请人： Nippon Steel Corp
发明人： OOHASHI TETSUO , KITAMURA OSAMU , FUJII HIROMU , MINEYUKI SEIZO , TAKEUCHI EIICHI
IPC分类号： B01F13/08 , B22D11/10 , B22D11/11 , B22D11/115
CPC分类号： B22D11/115 , B22D11/11

108. 发明专利

JPS5617172A PRODUCTION OF GOOD QUALITY STEEL MATERIAL BY CONTINUOUS CASTING 失效
公开(公告)号：JPS5617172A
公开(公告)日：1981-02-18
申请号：JP9350979
申请日：1979-07-23
申请人： NIPPON STEEL CORP
发明人： KITAYAMA MINORU , ODAJIMA TOSHIO , TAKEUCHI EIICHI , ETSUGI KAZUYA
IPC分类号： B22D11/12 , B22D11/128 , B22D11/16
摘要： PURPOSE:To obtain a steel material of good quality free from any surface defects by suppressing surface oxidation so as not to allow gas bubbles to oxide at the time of heating the ingot in which the air bubble positions made by casting the molten steel of the specifically controlled free oxygen concentration are specific prior to rolling. CONSTITUTION:The free oxygen concentration of molten steel piror to continuous casting is controlled within a range of 50-150ppm. The positions where the gas bubbles of the ingot obtained by casting this molten metal form go from the positions of 0.3-0.5mm. below the surface of the ingot toward the inner side and there are no exposed gas bubbles. However, a solid skin thickness is extremely thin and if the ingot is heated in ordinary hot rolling process, surface defects are produced. Thereupon, the ingot oxidation during this heating, that is, the formation of primary scale, is suppressed by evacuating the atmosphere in the heating furnace or admitting Ar or He therein or coating an antioxidant on the ingot surface.

109. 发明专利

JPS564359A ADDING METHOD OF AL IN CONTINUOUS CASTING 失效
公开(公告)号：JPS564359A
公开(公告)日：1981-01-17
申请号：JP7835279
申请日：1979-06-21
申请人： NIPPON STEEL CORP
发明人： OOHASHI TETSUO , FUJII HIROMU , TAKEUCHI EIICHI , HORII YOSHINOBU
IPC分类号： B22D11/10 , B22D11/108 , B22D11/11
摘要： PURPOSE:To enable the control of SolAl in molten steel at an extremely high Al yield by combining the electromagnetic rabbling of the molten steel in the slab with the intermittent addition of Al into tundish in adding Al into the molten steel having undergone precedent deoxidation. CONSTITUTION:The molten steel having undergone precedent deoxidation by Al, Si, Mn, etc. at the tapping is continuously cast in a mold 5 by way of a ladle 6 and tundish 7. The Al 10 for the purpose of obtaining the target SolAl value finally according to the oxygen level in this molten steel is charged intemittently from an adding device 9 into the molten steel in the tundish 7. In this state, the portions where Al exists and does not exist are made in the slab length direction and it is difficult to obtain the desired SolAl value over the entire length of the slab 1. Thereupon, electromagentic rabbling devices 2, 2' are operated continuously irrespective of the addition period or dwell period of Al to give the rabbling flow 4 in the perpendicular direction to the molten steel, whereby the distribution of the Al added in the slab is made even.

110. 发明专利

JPS564355A CONTINUOUS CASTING METHOD OF STEEL 失效
公开(公告)号：JPS564355A
公开(公告)日：1981-01-17
申请号：JP7834979
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 surely form the continuous electromagnetic flow having no stagnation by adjusting the injection position and/or direction of an immersion nozzle for injection of molten steel at the time of giving electromagnetic flow to the freezing interface molten steel by linear motors and forming a proper sound frozen layer to the slab. CONSTITUTION:Linear motors 3 are provided along two long sides 2 in a slab mold 1 and their thrust is given in mutually different directions 4, 4'. Electromagnetic flow 5 is thus given to the freezing interface molten steel up to the position where the freezing thickness corresponding to the scale thickness formed from at least during casting until the start of rolling. At this time, the length of the immersion nozzle 6 to inject molten steel into the mold is made long to deepen the injection position, or its injection direction is made downward or adjustments such as combining these are done. As a result of this, the jet flow 8 of the nozzle 6 does not hamper the foregoing electromagnetic flow and the continuous electromagnetic flow free from stagnation over the entire part of the freezing interface may be formed surely.

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