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81. 发明专利

JPH08224660A METHOD FOR PREVENTING FLOWING-OUT OF SLAG 失效
公开(公告)号：JPH08224660A
公开(公告)日：1996-09-03
申请号：JP3341395
申请日：1995-02-22
申请人： NIPPON STEEL CORP
发明人： UCHIMURA MITSUO , KIYOSE AKITO , MIYAZAWA KENICHI
IPC分类号： B22D11/10 , B22D1/00 , B22D11/103 , B22D11/119 , B22D11/16 , B22D43/00 , C21C7/00
摘要： PURPOSE: To prevent the flowing-out of slag by giving rotating movement to molten metal in a cylinder at the bottom part of a vessel, measuring the molten metal surface level from the back pressure of inert gas blown from a porous refractory, etc., on the cylindrical wall surface and closing a sliding nozzle. CONSTITUTION: The rotating movement is given to the molten metal in a molten metal surface height measuring instrument 15 arranged at the bottom part of a ladle 7 with an electromagnetic stirring coil 1, and the inert gas 3 is blown from the ladle wall through a porous plug or a nozzle having many fine holes. The gas bubbles 8 are accumulated to near the center with a blowing gas centrifugal separator 2 and after floating up the gas bubbles, new molten metal is changed into the molten metal surface height measuring instrument 15. At this time, the molten metal surface height 10 is judged from the back pressure of the blown inert gas 3 continuously measured with a back pressure measuring instrument 4. When the molten metal surface 13 reaches the ladle bottom 9, the sliding nozzle 5 arranged in a long nozzle 6 is closed to prevent the flowing- out of the slag. By this method, the clean molten metal can be supplied into the solidifying process.

82. 发明专利

JPH08206794A CONTINUOUS CASTING METHOD OF SLAB OF LARGE SECTION AND CONTINUOUS CASTING EQUIPMENT 失效
公开(公告)号：JPH08206794A
公开(公告)日：1996-08-13
申请号：JP1925595
申请日：1995-02-07
申请人： KOBE STEEL LTD
发明人： KAWAI KENJI , MAEDA MITSUAKI , ARAKAWA TAKAHARU
IPC分类号： B22D11/00 , B22D11/10 , B22D11/103
摘要： PURPOSE: To prevent the generation of surface flaws due to the inclination by arranging the closest part of the molten steel to be discharged in the direction approximately parallel to a pair of inner wall surfaces opposite to each other of a mold so as to be within the prescribed range from the inner wall surfaces. CONSTITUTION: The closest part of the molten steel indicated by the arrows C, D, E, F to be discharged from two sets of discharge ports (3c, 3d), (3e, 3f) to a pair of inner wall surfaces 1a, 1b respectively is arranged to be within the range of 50-150mm from the inner wall surfaces 1a, 1b respectively. When the position of the closest part of the molten steel is within

83. 发明专利

JPH08164449A APPARATUS FOR CONTINUOUSLY CASTING WIDE AND THIN CAST SLAB 失效
公开(公告)号：JPH08164449A
公开(公告)日：1996-06-25
申请号：JP31094694
申请日：1994-12-14
申请人： NIPPON STEEL CORP
发明人： TAKEUCHI TOMOHIDE , SAWANO KIYOSHI , MURAKAMI HIDEKI
IPC分类号： B22D11/10 , B22D11/06 , B22D11/103
摘要： PURPOSE: To obtain a good quality cast slab by arranging partition plates varying the dipping depth in the longitudinal direction along the width direction of cooling rotating bodies in a molten metal pool part. CONSTITUTION: The molten metal pool part 3 is formed of one pair of the cooling rolls 1 and one pair of side weirs. A nozzle 4 is dipped into the molten metal pool part 3, and the molten metal from the nozzle 4 is cooled by the rolls 1 and the side weirs and made to be the wide and thin cast slab at the lower part and drawn out. Two pieces of partition plates 6 are arranged with the nozzle 4 between into the molten metal pool part 3 along the width direction. The partition plate 6 is dipped so that the dipping depth is charged in the width direction, that is, is dipped shallowly at the center position by notching the center part at the lower part into the rectangular shape and is dipped retatively deeply at both side parts thereof. By this constitution, the molten metal stream in the plane spouted from the nozzle can be guided in the good condition and the entrapment of the scum, etc., can be prevented.

84. 发明专利

JPH08120357A PRODUCTION OF COPPER ALLOY CONTAINING ACTIVE METAL 失效
公开(公告)号：JPH08120357A
公开(公告)日：1996-05-14
申请号：JP26044794
申请日：1994-10-25
申请人： NIKKO KINZOKU KK
发明人： SHIMADA TAKASHI
IPC分类号： B22D11/10 , B22D11/103 , C22B9/04 , C22C1/02
摘要： PURPOSE: To produce a copper alloy having high cleanliness in good yield by melting the copper alloy with an induction melting furnace in a vacuum vessel and continuously casting through a tundish under inert gas atmosphere with a siphon, at the time of melting and casting the copper alloy containing active metal. CONSTITUTION: The copper alloy layer containing the active metal of iron, etc., is charged into a crucible 3 in the induction melting furnace 4 fitted in the air-tight vessel 5, and after closing with a cover 35, evacuation is executed in the vassel 5. Successively, the electricity is conducted to an induction coil 2 arranged at the outside of the crucible 3 to heat and melt the copper alloy in the crucible, and the molten copper alloy 8 having slag layer 52 on the surface is formed. Further, the inert gas is pressed from a pipe 26 of a cover 25, and the molten copper alloy 8 is pushed up into a molten metal pouring chamber 31 under the inert gas atmosphere through the siphon 32 with the pressure. The molten copper alloy 37 is supplied into the tundish 44 under the inert gas atmosphere through a lance pipe 39 and cast into a continuous casting mold 51 from a bottom nozzle 48 while heating with an induction coil 4. The molten copper alloy is continuously cast under the high quality condition without oxidizing.

85. 发明专利

JPH0832359B2 失效
公开(公告)号：JPH0832359B2
公开(公告)日：1996-03-29
申请号：JP19436487
申请日：1987-08-05
申请人： MITSUBISHI HEAVY IND LTD
发明人： ITANO SHIGEO , YOKOTE HIROMI , AKITA HIDEKI , YAMANE TAKASHI , NISHIMURA OSAMU
IPC分类号： B22D11/06 , B22D11/10 , B22D11/103

86. 发明专利

JPH0871714A METHOD FOR CONTINUOUSLY CASTING STEEL 失效
公开(公告)号：JPH0871714A
公开(公告)日：1996-03-19
申请号：JP22900394
申请日：1994-08-31
申请人： NIPPON STEEL CORP
发明人： KIYOSE AKITO , FUKUDA ATSUSHI , TEFUN MAKOTO
IPC分类号： B22D11/10 , B22D11/103 , B22D11/115
摘要： PURPOSE: To provide a continuous casting method for steel producing a high quality cast slab having little crack on the surface layer and little inclusion and bubble. CONSTITUTION: Electromagnetic stirring developing circular flow in the horizontal direction to the molten steel in a mold is impressed and also, the direction spouting flow 6 of the molten steel from an immersion nozzle is made into the direction which does not pass through the center axis of the immersion nozzle and the parallel direction to the long sides 1a of the mold in the case of seeing from the upper part of the mold 1. Further, the directions of the circular flow of the molten steel near a meniscus in the mold by the electromagnetic stirring and the spouting flow from the immersion nozzle are made mutually in the reverse direction at the same long side 1a of the mold seeing from the upper part of the mold. By this method, the cast slab having little crack on the surface layer and little inclusion and bubble can be produced, and a grinding and cleaning in the production process can be omitted and also, the product yield is improved.

87. 发明专利

JPH0871712A METHOD FOR DECIDING MIXING RANGE OF DIFFERENT KINDS OF STEEL IN CONTINUOUS CASTING 失效
公开(公告)号：JPH0871712A
公开(公告)日：1996-03-19
申请号：JP23963694
申请日：1994-09-08
申请人： NIPPON STEEL CORP
发明人： IWAMI SHINKOU , FUKUDA ATSUSHI
IPC分类号： G01N33/20 , B22D11/10 , B22D11/103 , B22D11/119 , B22D11/16
摘要： PURPOSE: To improve the yield and to prevent the occurrence of defective quality by improving the accuracy of a calculation of the length of unsuitable component. CONSTITUTION: The calculation of the mixing of molten steels is started from starting of the pouring and an inputted data is edited and made from component value tiles and instant data (S101). A fixed periodical calculation is started with the pre-decided calculation period (S102). The molten steel components at the joint part mixing the previous and the following heats are accurately calculated with time based on the inputted data with the molten steel component calculation at the fixed period and the calculated result at the previous time (S103). The projective components in the previous and the following heats and calculated molten metal components are compared, and the mixing range of difficult kinds of steel is decided to decide the cutting length of a waste cast slab having the unsuitable component (S104).

88. 发明专利

JPH0852541A CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH0852541A
公开(公告)日：1996-02-27
申请号：JP27011094
申请日：1994-08-11
申请人： HITACHI CABLE
发明人： YAMANOBE HIROSHI
IPC分类号： B22D11/10 , B22D11/06 , B22D11/103
摘要： PURPOSE:To reduce the development of blow hole in a cast bar by pouring molten metal while shifting a plate-like member according to the molten metal level in a casting space. CONSTITUTION:In the caster of a continuous casting apparatus, the separate plate (molten metal pouring guide member) 11 having a prescribed gap delta to a driving roll 2b at the tip part and positioned in the molten metal 7 of the casting space 18, is arranged at the molten metal pouring part of the casting space 18. The separate plate 11 is fitted to the one end of a holding bar 12 having a fitting hole 13 at the other end through a fitting metal and fixed so as to incline with a prescribed angle to the casting space 18 from the upper part of a tundish with the fitting hole 13. This separate plate 11 is inserted by a prescribed distance (1) (1=20-50mm is preferable) from the surface of the molten metal 7 at the tip part 11a according to the molten metal level. This tip part 11a softly detaches the poured molten metal 3.

89. 发明专利

JPH0852532A CONTINUOUS CASTING METHOD OF STAINLESS STEEL SHEET EXCELLENT IN SURFACE CONDITION 失效
公开(公告)号：JPH0852532A
公开(公告)日：1996-02-27
申请号：JP21200494
申请日：1994-08-12
申请人： NIPPON STEEL CORP
发明人： TANAKA HIROYUKI , MIURA RYUSUKE , NISHIHARA RYOJI , HISATOMI RYOICHI
IPC分类号： B22D11/00 , B22D11/10 , B22D11/103 , B22D11/11 , B22D11/112 , B22D11/115 , B22D11/116 , B22D11/117
摘要： PURPOSE:To suppress deposit of inclusions on the surface part of steel sheet and to prevent generation of surface defect by generating static magnetic field having uniform magnetic flux density in a mold and specifying the relation among molten metal temp. in a tundish and discharge port angle, discharging quantity and magnetic field of an immersion nozzle. CONSTITUTION:A molten Ti containing stainless steel is supplied from an immersion nozzle 11 arranged at the bottom part of a tundish 12 to a mold 15 having square cross section, and a stainless steel sheet is continuously cast. In this case, a static magnetic field 10 whose magnetic flux density is spread approximately uniformly in all width directions is generated at the position approximately under the immersion nozzle 11 in the mold 15. In the case that a molten metal temp. in tundish 12 is defined as TTD, a molten metal discharging mouth angle of immersion nozzle is A (degree), a pouring quantity is Q(t/min), and a magnetic flux density is B (tesla), the operation is executed under the condition to satisfy the inequality TTD-7(B+0.05) .(A+1) .Q >=1490. Ti content in the steel is desirably 0.01-0.6wt.%. By this method, the steel sheet having uniformly dispersed TiN cluster is obtained.

90. 发明专利

JPH0815638B2 失效
公开(公告)号：JPH0815638B2
公开(公告)日：1996-02-21
申请号：JP29731487
申请日：1987-11-25
IPC分类号： B22D11/10 , B22D11/00 , B22D11/04 , B22D11/06 , B22D11/103 , B22D11/11 , B22D11/112 , B22D11/14 , B22D41/58 , B22D41/60 , B22D41/62

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