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1. 发明专利

JP2005305456A Powder for continuous casting for steel and continuous casting method for steel using the same 审中-公开
标题翻译：用于钢连续铸造的粉末和使用该钢的连续铸造方法
公开(公告)号：JP2005305456A
公开(公告)日：2005-11-04
申请号：JP2004122106
申请日：2004-04-16
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SASAI KATSUHIRO , OTA MITSUHIKO , OHASHI WATARU , ISOKAMI KATSUYUKI
IPC分类号： B22D11/108
摘要： PROBLEM TO BE SOLVED: To provide powder for continuous casting for steel with which the generation of the longitudinal cracks in the surface of a slab can be prevented, and also the generation of scars and the generation of restraint type breakout can be prevented, and to provide a continuous casting method for steel.
SOLUTION: In the method for producing powder for continuous casting for steel, the powder has a composition comprising CaO and SiO
2 , and in which the ratio of (the mass of CaO)/(the mass of SiO
2 ) is 0.8 to 1.6, and also, comprising one or more kinds selected from Ce oxides, La oxides and Nd oxides by 1 to 25 mass% in total, and further, having a solidifying temperature of 800 to 1,300°C. By using the powder for continuous casting for steel produced by the production method to continuous casting for steel, the generation of longitudinal cracks and scars in a slab can be prevented, and further, the generation of restraint type breakout can be prevented.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：为了提供可以防止板坯表面产生纵向裂纹的钢的连续铸造用粉末，并且可以防止产生疤痕和产生限制型突破，并提供钢的连续铸造方法。＆lt; P＆gt;解决方案：在用于钢的连续铸造用粉末的方法中，粉末具有包含CaO和SiO 2 的组成，其中（CaO的质量）/（ SiO 2的质量）为0.8〜1.6，并且还包含总共为1〜25质量％的选自Ce氧化物，La氧化物和Nd氧化物中的一种或多种，并且还具有固化温度为800〜1300℃。通过使用用于钢的连续铸造的制造方法制造的钢的连续铸造用粉末，可以防止板坯中的纵向裂纹和疤痕的产生，并且可以防止产生限制型突破。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2004176143A Extra-low carbon steel thin-sheet superior in formability and workability 有权
公开(公告)号：JP2004176143A
公开(公告)日：2004-06-24
申请号：JP2002345144
申请日：2002-11-28
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SASAI KATSUHIRO , OHASHI WATARU , ISOKAMI KATSUYUKI , MIZUNO KAORU , MIZUKAMI KAZUSANE
IPC分类号： B22D11/00 , B22D11/108 , C22C38/00 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide an extra-low carbon steel thin-sheet which shows a high r-value (r-value≥2.0) and a high elongation (total elongation≥50%) by promoting recrystallizing grain growth in continuous annealing, while alleviating such loads in the steps as purification in a steel-making step, high rolling-reduction and high-temperature winding in a hot rolling step, and high-temperature annealing in a continuous annealing step, to the utmost.
SOLUTION: In the extra-low carbon steel thin-sheet with a C concentration of 50 ppm or lower, the steel thin-sheet superior in workability is characterized in that the density of the number of precipitates per unit area having a particle diameter of 10 nm or larger but 200 nm or smaller is 5×10
6 /mm
2 or less.
COPYRIGHT: (C)2004,JPO

3. 发明专利

JP2004169107A Method for manufacturing low carbon steel cast slab 有权
公开(公告)号：JP2004169107A
公开(公告)日：2004-06-17
申请号：JP2002335999
申请日：2002-11-20
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SASAI KATSUHIRO , OHASHI WATARU , ISOKAMI KATSUYUKI
IPC分类号： B22D1/00 , C21C7/00 , C21C7/04 , C21C7/06 , C21C7/068 , C21C7/10
摘要： PROBLEM TO BE SOLVED: To provide a method for melting low carbon steel cast slab for a thin steel plate in which surface flaw and nozzle clogging are surely prevented by performing deoxidation for mainly Ti so as not to generate alumina inclusions.
SOLUTION: In a low carbon steel cast slab manufacturing method, decarburization is performed so that carbon content is ≤0.01%, Ti of ≥2 divisions is added to molten steel, and at least La and Ce are added to cast molten steel. The dissolved oxygen amount after the first Ti addition is preferably controlled to 0,001-0.01 mass%. Further, inclusion floating time of ≥30 seconds is preferably ensured after Ti is added first, and before Ti is added next.
COPYRIGHT: (C)2004,JPO

4. 发明专利

JPH03161160A METHOD FOR RAISING TEMPERATURE OF MOLTEN STEEL IN LADLE 失效
公开(公告)号：JPH03161160A
公开(公告)日：1991-07-11
申请号：JP29484289
申请日：1989-11-15
申请人： NIPPON STEEL CORP
发明人： MATSUSHITA AKIRA , KANEMOTO MICHITAKA , ISOKAMI KATSUYUKI , IBARAKI TETSUJI
IPC分类号： B22D41/01
摘要： PURPOSE:To effectively raise molten steel temp. and to stabilize continuous casting process by charging basic flux into a submerged hood. CONSTITUTION:Stirring gas 9 is blown from bottom part of the molten steel in a ladle and the submerged hood 5 is submerged into the molten steel while executing stirring of the molten steel 1, and oxygen gas is blown in the submerged hood 5 and also Si the quantity of which is set based on the necessary raising heat quantity to raise the temp. of molten steel 1. In this case, by executing the operation while charging excess CaO as the flux so as to be the prescribed slag basicity or more in the submerged hood 5 after raising the temp., problem on the refractory and manganese loss in steel can be solved. Therefore, the effective molten steel temp. can be raised and the continuous casting process is stabilized and the production cost can be greatly reduced.

5. 发明专利

JPS5856002B2 JPS5856002B2 - 失效
公开(公告)号：JPS5856002B2
公开(公告)日：1983-12-13
申请号：JP6778379
申请日：1979-05-31
申请人： Nippon Steel Corp
发明人： FUJII YOSHIHIRO , YOSHIDA TOORU , UEDA JUJIRO , ISOKAMI KATSUYUKI
IPC分类号： C21C5/32 , C21C5/30
CPC分类号： C21C5/30 , Y02P10/212

6. 发明专利

JP2005002358A Extremely low carbon steel cast slab-manufacturing method 有权
标题翻译：超低碳钢铸坯制造方法
公开(公告)号：JP2005002358A
公开(公告)日：2005-01-06
申请号：JP2003163516
申请日：2003-06-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SASAI KATSUHIRO , OHASHI WATARU , ISOKAMI KATSUYUKI
IPC分类号： B22D11/00 , B22D11/108 , C21C7/00 , C21C7/06 , C21C7/068 , C21C7/10 , C22C38/00 , C22C38/12 , C22C38/14
摘要： PROBLEM TO BE SOLVED: To provide an extremely low carbon steel cast slab-manufacturing method capable of reliably preventing surface defects by reducing the amount of inclusions in molten steel to extremum. SOLUTION: In the extremely low carbon steel cast slab manufacturing method, molten steel is decarburized under the atmospheric pressure so that the C concentration in the molten steel is ≥ 0.045 mass % but ≤ 0.07 mass %, and the molten steel is refined under the vacuum so that the C concentration is ≤ 0.005 mass % and the concentration of dissolved oxygen is ≤ 0.0045 mass %. After Nb is added to the molten steel without Al-deoxidation, the molten steel is continuously cast. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种极低碳钢铸钢板制造方法，其能够通过将钢水中的夹杂物的量减少到极值来可靠地防止表面缺陷。解决方案：在极低碳钢铸坯制造方法中，钢水在大气压下脱碳，使钢水中的C浓度≥0.045质量％≤0.07质量％，钢水精炼在真空中使C浓度为0.005质量％，溶解氧浓度为0.0045质量％。将Nb添加到没有脱铝的钢水中后，钢水连续铸造。版权所有（C）2005，JPO＆NCIPI

7. 发明专利

JP2004238665A Low carbon steel thin slab obtained by twin drum type continuous casting method, low carbon thin steel sheet, and production method therefor 审中-公开
公开(公告)号：JP2004238665A
公开(公告)日：2004-08-26
申请号：JP2003027786
申请日：2003-02-05
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SASAI KATSUHIRO , OHASHI WATARU , ISOKAMI KATSUYUKI
IPC分类号： B22D11/00 , B22D11/06 , C22C38/00 , C22C38/12
摘要： PROBLEM TO BE SOLVED: To provide a low carbon thin steel sheet in which surface flaws can securely be prevented with hardly forming inclusions in molten steel by finely precipitating oxide on solidification, to provide a low carbon steel slab, and to provide a production method therefor.
SOLUTION: In the method of producing a low carbon steel thin slab, molten steel is decarburized so that the concentration of carbon therein reaches a low carbon concentration region, thereafter, Nb is added to the molten steel, further, the concentration of dissolved oxygen in the molten steel is controlled to 0.02 to 0.06 mass%, and the molten steel is cast by a twin drum type continuous casting method.
COPYRIGHT: (C)2004,JPO&NCIPI

8. 发明专利

JP2002219557A TWIN DRUM TYPE CONTINUOUSLY CASTING DRUM 失效
公开(公告)号：JP2002219557A
公开(公告)日：2002-08-06
申请号：JP2001015357
申请日：2001-01-24
申请人： MITSUBISHI HEAVY IND LTD , NIPPON STEEL CORP
发明人： ISOKAMI KATSUYUKI , YAMADA MAMORU , TANAGA TAKESHI , ISAKI HIROSHI , IZU TADAHIRO , TSUNENARI KEIJI , YAMAMURA KAZUTO , MIYAKE KATSUYOSHI , YOKOO KAZUTOSHI , SASAKI KUNIMASA
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To provide a casting drum composed of a Cu-alloy made sleeve and an SUS-made core light in weight, free from the sliding of a fitting part in thermal loading, and long in durable life, in a twin drum type continuous casting drum used for twin drum type continuous casting equipment. SOLUTION: By constituting the SUS made core, which is fitted into a Cu- alloy made sleeve, of ring-shaped cores juxtaposed in the axial direction with a space with one another as a plurality of splitted bodies, the sleeve is movable in the axial direction at the part where the core does not exist, and the relative sliding on the fitting part becomes hard to be caused at the part where the core exists owing to that the length in the axial direction of the fitting part of the sleeve and the core is cut to be short, as a result, enabling the tightening force to be small in fitting of the sleeve and the core, which enables the sleeve to be formed thin.

9. 发明专利

JP2005002357A Extremely low carbon steel cast slab-manufacturing method 审中-公开
标题翻译：超低碳钢铸坯制造方法
公开(公告)号：JP2005002357A
公开(公告)日：2005-01-06
申请号：JP2003163515
申请日：2003-06-09
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： SASAI KATSUHIRO , OHASHI WATARU , ISOKAMI KATSUYUKI
IPC分类号： B22D11/00 , B22D11/04 , B22D11/11 , B22D11/114 , B22D11/115 , C21C7/00 , C21C7/068 , C22C38/00 , C22C38/12
摘要： PROBLEM TO BE SOLVED: To provide an extremely low carbon steel plate, an extremely low carbon steel cast slab, and a method for manufacturing the same in which surface defects can be reliably prevented by minutely depositing oxides during the solidification without generating any inclusions in molten steel.
SOLUTION: In the extremely low carbon steel cast slab manufacturing method, molten steel is decarburized so that carbon concentration becomes ≤ 0.005 mass %, at least Ta and W are added to the molten steel, and the molten steel is cast after the concentration of dissolved oxygen in the molten steel is adjusted to be ≥ 0.02 mass % but ≤ 0.06 mass %.
COPYRIGHT: (C)2005,JPO&NCIPI

10. 发明专利

JP2002028758A COOLING DRUM FOR TWIN-DRUM TYPE CONTINUOUS THIN PLATE CASTING AND ITS PRODUCING METHOD 失效
公开(公告)号：JP2002028758A
公开(公告)日：2002-01-29
申请号：JP2000213038
申请日：2000-07-13
申请人： NIPPON STEEL CORP
发明人： KURISU YASUSHI , TSUNENARI KEIJI , TAKEUCHI EIICHI , YAMAMURA HIDEAKI , ISOKAMI KATSUYUKI , YAMADA MAMORU , IZU TADAHIRO , MIZUCHI ISAO , MIYAZAKI MASAFUMI
IPC分类号： B22D11/06
摘要： PROBLEM TO BE SOLVED: To provide a cooling drum for twin-roll type continuous thin plate casting apparatus with which this cooling dram is formed with a heat-insulating layer on the peripheral surface thereof, the wear resistance and the deforming resistance are reinforced with a means having comparatively low cost, the uniform contact with molten steel is stably secured, the stable continuous casting is realized for long term and the quality of a cast slab can stably be secured. SOLUTION: This cooling drum is formed with a drum basis material having >=100 W/m.k thermal conductivity and the heat insulating layer having 0.1-20 W/m.k thermal conductivity and >=300 Hv Vickers hardness or the heat insulating layer formed of oxidized film having 0.1-20 W/m.k thermal conductivity, through an intermediate layer having 0.5-1.2 times of the drum basis material in the coefficient of thermal conductivity and >=150 Hv Vickers hardness. Further, this cooling drum is the one forming discontinuous recessing parts and projecting parts on the surface and considering to stably secure the quality of the cast slab by stably securing the uniform contact with the molten steel.

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