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1. 发明专利

JP2006192440A Mold powder for continuously casting steel 有权
标题翻译：连铸铸铁粉末
公开(公告)号：JP2006192440A
公开(公告)日：2006-07-27
申请号：JP2005003483
申请日：2005-01-11
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MIZOGUCHI TOSHIAKI , UEJIMA YOSHIYUKI , KONDO KATSUMI , SAKAI DAISUKE
IPC分类号： B22D11/108 , B22D11/111
摘要： PROBLEM TO BE SOLVED: To provide new mold powder for continuous casting which can prevent the inclusion into the inner part of molten steel and is suitable for producing a steel sheet having high surface grade.
SOLUTION: The mold powder for continuous casting, is used as the followings, in which the powder viscosity at 1300°C is ≤12 poise and the powder composition and the powder viscosity are decided so as to satisfy the formula (A): mass% SiO
2 +(mass%Na
2 O+mass%Li
2 O)/2≤(0.32η
0.16 -0.0756)/0.0087. Since the reactivity with the molten steel is restrained by reducing SiO
2 , Na
2 O, Li
2 O in comparison with the conventional mold powder, the entrapment of the mold powder into the molten steel is drastically reduced and the steel sheet having high surface grade can be obtained.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供可以防止包含在钢水内部的连续铸造的新的模具粉末，并且适合于生产具有高表面等级的钢板。解决方案：用于连续铸造的模具粉末，其中1300℃下的粉末粘度≤12泊，粉末组成和粉末粘度确定为满足式（A）：质量％SiO 2 +（质量％Na 2 O +质量％Li 2 O）/2≤（0.32η 0.16 -0.0756）/0.0087。由于与常规的模具粉末相比，通过还原SiO 2 SB 2，Na 2 SB 2，Sb 2 O 3，可以抑制与钢水的反应性，模具粉末在钢水中的夹带剧烈地减少，并且可以获得具有高表面等级的钢板。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2003119546A STEEL FOR THIN SHEET WITH LITTLE DEFECT DUE TO INCLUSION 审中-公开
公开(公告)号：JP2003119546A
公开(公告)日：2003-04-23
申请号：JP2001316843
申请日：2001-10-15
申请人： NIPPON STEEL CORP
发明人： MIZOGUCHI TOSHIAKI , UEJIMA YOSHIYUKI , KONDO KATSUMI
IPC分类号： C22C38/00 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide a steel for thin sheet suitable for an automotive steel sheet, a steel sheet for deep drawing or the like, which contains few inclusions, and makes inclusions generating in a deoxidation process and a solidification process have a low melting point as a composite oxide of ternary system or more components system, which has excellent friability when rolled, and does not become clusters. SOLUTION: This steel for thin sheet comprises oxide inclusions in the steel, which contain Ti oxide, Al2 O3 , and CaO as main components, wherein Ti oxide is made to be 1-30%, and CaO/Al2 O3 to be in a range of 0.4-2.3 by weight ratio.

3. 发明专利

JPH0839221A METHOD FOR POURING MOLTEN STEEL INTO TUNDISH FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH0839221A
公开(公告)日：1996-02-13
申请号：JP17512794
申请日：1994-07-27
申请人： NIPPON STEEL CORP
发明人： AMADA KATSUMI , ITO AKIHIRO , KONDO KATSUMI , MURAYAMA YUKIO
IPC分类号： B22D11/18 , B22D11/10
摘要： PURPOSE:To improve the quality and the yield of a cast slab by pouring molten steel while adjusting the opening degree of an opening/closing plate of a molten steel pouring nozzle in a ladle in a specific condition. CONSTITUTION:Beforehand, the equation I is stored in a sequencer 16 and the shifting distance in the slide direction of a supporting device 8 for long nozzle 6 is obtd. with a range finder 20. This distance is introduced to the sequencer 16 and the opening degree with an upper and a lower plates 4, 5 is calculated and inputted to a controller 17 to execute a setting value control. This signal is introduced to a hydraulic unit 18 to control the calculated opening degree by adjusting the sliding of the lower plate 5. The molten steel is poured while adjusting the nozzle opening degree with the opening/closing plates 4, 5 based on the equation I at the initial stage of pouring the molten steel 2 in the following ladle 1 and at the end stage of pouring the molten steel in the previous ladle. In the equation I, the nozzle opening degree = DELTAL-B, wherein, DELTA1 is the shifting distance in the slide direction of a counter wt. of the supporting device for long nozzle, DELTAL is the shifting distance of the lower plate in the sliding nozzle, K1 is the proportional constant of DELTA1 and DELTAL and B is the distance between the inner diameters of the upper and the lower plate holes at the time of wholly closing the sliding nozzle.

4. 发明专利

JPH0760422A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH0760422A
公开(公告)日：1995-03-07
申请号：JP23080493
申请日：1993-08-25
申请人： NIPPON STEEL CORP
发明人： KONDO KATSUMI , SAKAMOTO YASUHIRO , AMADA KATSUMI , HARA KENICHI
IPC分类号： B22D11/00 , B22D11/10 , B22D11/108 , B22D11/111 , B22D11/16 , B22D11/20
摘要： PURPOSE:To prevent the cracking at a corner part by requlating mold powder consumption within the specific range and a mold taper in the short side of a mold to be specific values or lower, at the time of casting an Nb-containing carbon steel at a casting speed in the specific range with a bending type continuous casting machine having a vertical part. CONSTITUTION:In the high speed casting, such as >=1.8m/min casting rate, the shortage of powder inflow is easily caused and defective lubrication between the mold and shell is caused and the frictional force acts on a solidified shell, and cracks are easily generated on the corner part in a cast slab. Then, at the time of casting the steel containing

5. 发明专利

JPH079096A METHOD FOR POURING MOLTEN METAL AT THE END STAGE OF LADLE 失效
公开(公告)号：JPH079096A
公开(公告)日：1995-01-13
申请号：JP15247293
申请日：1993-06-23
申请人： NIPPON STEEL CORP
发明人： AMADA KATSUMI , ARAI YASUHIRO , KONDO KATSUMI , WATANABE HIDEMI
IPC分类号： B22D11/10 , B22D11/103 , B22D11/119 , B22D11/16 , B22D11/18 , B22D41/50 , B22D41/56
摘要： PURPOSE:To reduce the mixed quantity of ladle slag into a tundish as little as possible and to reduce the remained molten steel. CONSTITUTION:In the molten steel pouring method at the end stage of the ladle, relation between the remained molten steel quantity in the ladle and the pouring quantity in an eddy developing limit is obtd. beforehand, and the remained molten steel quantity from a load cell 9 in the ladle 1 is grasped, and also, the pouring quantity at this time from the variation of the load cell per unit time is grasped, and the molten steel is poured into the tundish 5 at the pouring flow rate in the range which does not develop the eddy. Further, by using the tundish enabling receive of the molten steel at the same time from plural ladies, the operation can be executed without dropping the casting speed. As the flowing-out slag into the tundish can be almost zero, the quantity of a cast slag is remarkably improved, and as the remained molten steel at the last stage can be almost zero, the yield of the molten steel is remarkably improved.

6. 发明专利

JPH06292960A METHOD FOR MEASURING POURING FLOW RATE OF MOLTEN METAL 失效
公开(公告)号：JPH06292960A
公开(公告)日：1994-10-21
申请号：JP8362193
申请日：1993-04-09
申请人： NIPPON STEEL CORP
发明人： AMADA KATSUMI , ITO AKIHIRO , SAWAMURA SHINYA , KONDO KATSUMI
IPC分类号： B22D11/10 , B22D11/103 , B22D11/119 , B22D11/16 , B22D11/18 , B22D37/00
摘要： PURPOSE:To carry out measuring of a pouring flow rate without delay by measuring vibrating output in a pouring nozzle supporting device and calculating the pouring flow rate based on the vibrating output. CONSTITUTION:At the time of measuring the pouring flow rate of high temp. molten metal at the molten metal pouring position from a vessel 1 to a vessel 2 through the pouring nozzle, a vibration detector is arranged to the pouring nozzle supporting device 3. Based on a specific equation from a correlation between the vibrating output in the detector and a stirring power density in the pouring nozzle developed by dropping of the molten metal, the pouring flow rate is obtd. In the equation, d: stirring power density in the pouring nozzle (W/m ), m: mass flow rate (kg/s), v1: molten metal flow speed at outlet side of the vessel 1 (m/s), v2: average flow speed at outlet of the pouring nozzle (m/s), g: gravity acceleration (m/s ), h: height from the outlet side of the vessel 1 to the molten metal surface in the pouring nozzle (m), V: volume of the molten metal in the nozzle (m ), (at the time of negative pressure being 0 in the pouring nozzle), u: volume of the molten metal sucked up with the negative pressure in the pouring nozzle (m ), k: proportional constant.

7. 发明专利

JPH05285591A 失效
公开(公告)号：JPH05285591A
公开(公告)日：1993-11-02
申请号：JP9537892
申请日：1992-04-15
申请人： NIPPON STEEL CORP
发明人： NAGAO TOSHIMICHI , IGARI SHIGENORI , KONDO KATSUMI , TAKAGI NOBUHIRO
IPC分类号： B22D7/00 , B22D7/06 , B22D7/10
摘要： PURPOSE:To obtain the ingot making method which limits a thick segregated part only to the riser part and decreases a' crop amt. by using only the ordinary riser frame. CONSTITUTION:This ingot making method for a killed steel consists in forming the ingot by satisfying the conditions H1

8. 发明专利

JP2007105745A Continuous casting method of steel 有权
标题翻译：钢的连续铸造方法
公开(公告)号：JP2007105745A
公开(公告)日：2007-04-26
申请号：JP2005296580
申请日：2005-10-11
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： KONDO KATSUMI , HAYAKAWA MASANOBU , SUEMATSU YOSHIAKI , MIZOGUCHI TOSHIAKI , SAKAI DAISUKE
IPC分类号： B22D11/11 , B22D11/04 , B22D11/115
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method of steel, which method can manufacture a cast ingot having excellent internal quality by surely controlling the discharge flow from an immersed nozzle. SOLUTION: An electromagnetic agitating device 3 is arranged in the neighborhood of a long side meniscus of a casting mold 1 having a rectangular cross section so as to be opposed to the long side meniscus. In addition, an electromagnetic brake 4 is arranged under the electromagnetic agitating device 3 so as to satisfy the relations of the following expressions (1) and (2): L-α≤l, and L+α≥l+(W/2)tanθ, [where L is the distance (mm) from the meniscus to the center of the core of the electromagnetic brake, α is the distance (mm) from the center of the core to the position where the maximum magnetic flux density of the electromagnetic brake decays to 50%, l is the immersed depth (mm) of the immersed nozzle, θ is the discharge angle (°) of molten steel, and W is the width (mm) of the casting mold in the lateral direction]. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供钢的连续铸造方法，该方法可以通过可靠地控制来自浸入喷嘴的排出流动来制造具有优异的内部质量的铸锭。解决方案：电磁搅拌装置3布置在具有矩形横截面以与长边弯液面相对的铸模1的长边弯液面附近。另外，电磁制动器4配置在电磁搅拌装置3的下方，以满足下述式（1）和（2）的关系：L-α≤l，L +α≥1+（W / 2） tanθ，[其中L是从弯月面到电磁制动器的芯的中心的距离（mm），α是从芯的中心到电磁的最大磁通密度的位置的距离（mm）制动衰减到50％，l是浸入式喷嘴的浸入深度（mm），θ是钢水的排出角度（°），W是铸模在横向上的宽度（mm）]。版权所有（C）2007，JPO＆INPIT

9. 发明专利

JP2005271069A Continuous casting method for molten steel 有权
标题翻译：铸钢连续铸造方法
公开(公告)号：JP2005271069A
公开(公告)日：2005-10-06
申请号：JP2004091828
申请日：2004-03-26
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： TAKAGI YUKIKO , KONDO KATSUMI , UEJIMA YOSHIYUKI , MIZOGUCHI TOSHIAKI
IPC分类号： B22D11/108 , B22D11/00 , B22D11/11
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method for molten steel capable of performing stable operation by preventing the defect due to hydrogen in the molten steel and heat extraction defect.
SOLUTION: In the continuous casting method for the molten steel, mold powder having hydrogen absorbency is added to the molten steel 5 in a casting mold such that the hydrogen included in the molten steel 5 in the casting mold 1 is absorbed into the mold powder and therefore, the heat extraction defect due to the hydrogen can be prevented and the operation can be stabilized. Also, the mold powder is so prepared that 6 to 20wt% alumina is contained therein and the basicity of the mold powder is within a range from 1.3 to 2.0 and, thereby the hydrogen absorbency can be improved, the heat extraction defect due to the hydrogen can be surely prevented and the operation can be stabilized.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种能够通过防止钢水中的氢缺陷和热提取缺陷来进行稳定操作的钢水的连续铸造方法。解决方案：在用于钢水的连续铸造方法中，在铸模中向钢水5中加入具有吸氢性的模具粉末，使得铸模1中包含的钢水5中的氢被吸收到因此，可以防止由于氢引起的热提取缺陷，能够使操作稳定。此外，如此制备模具粉末，其中含有6至20重量％的氧化铝，并且模具粉末的碱度在1.3至2.0的范围内，从而可以提高吸氢性，由于氢气引起的热提取缺陷可以肯定地防止并且操作能够稳定。版权所有（C）2006，JPO＆NCIPI

10. 发明专利

JP2005177848A Center defect reducing method of continuously cast steel slab 有权
标题翻译：连续铸钢板的中心缺陷减少方法
公开(公告)号：JP2005177848A
公开(公告)日：2005-07-07
申请号：JP2003425262
申请日：2003-12-22
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： UEJIMA YOSHIYUKI , KONDO KATSUMI , WATANABE YU , MATSUBA SHIGEKAZU , YASUI YOJI , TAKAHASHI YASUTETSU
IPC分类号： B22D11/108 , B22D11/11 , B22D11/115
摘要： PROBLEM TO BE SOLVED: To provide a center defect reducing method of a continuously cast steel slab at a low cost without performing low-temperature casting with inferior operational consistency or high-temperature soaking diffusion of the slab at excessive cost under the low rolling reduction at the end of solidification with high equipment load.
SOLUTION: In the continuous casting of Al killed steel, fine center equiaxed crystal is formed by containing dissolved REM concentration of ≥0.5 ppm and

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