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1. 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

2. 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

3. 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
摘要翻译：要解决的问题：为了以低成本提供连续铸钢坯的中心缺陷还原方法，而不进行低成本的低温铸造，具有较差的操作稠度或板坯的高温浸泡扩散，成本低廉凝固结束时的设备负荷高。解决方案：在连铸Al中的钢中，通过在中间包中含有≥0.5ppm的溶解的REM浓度和<60ppm的钢水形成细中心等轴晶体，并且偏析粒度或中心孔径，发电量减少。版权所有（C）2005，JPO＆NCIPI

4. 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

5. 发明专利

JP2007229737A Vertical type continuous casting method of large cross-section cast slab for thick steel plate 有权
标题翻译：大型横截面立式铸造连续铸造方法
公开(公告)号：JP2007229737A
公开(公告)日：2007-09-13
申请号：JP2006052163
申请日：2006-02-28
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MIZOGUCHI TOSHIAKI , UEJIMA YOSHIYUKI , KONDO KATSUMI , HAYAKAWA MASANOBU , YASUI YOJI
IPC分类号： B22D11/108 , B22D11/00 , B22D11/041 , B22D11/20
摘要： PROBLEM TO BE SOLVED: To provide a vertical type continuous casting method of a large section cast slab having ≥380 mm thickness of the cast slab while restraining the surface crack. SOLUTION: In a method for continuously casting the large cross-section cast slab for thick steel plate having ≥380 mm thickness of the cast slab at ≤0.2 m/min casting speed with the vertical continuous caster, as mold powder for covering the molten steel surface in a mold, the mold powder satisfying a formula for coefficient of viscosity η at 1,300°C, η≥0.03×D-6 (unit of η is poise and unit of D is mm), is used. In this way, the variation of the molten steel surface is restrained and the flow mark (lipple mark) depth on the molten steel surface is set to ≤1.5 mm and γ grain boundary crack generated at the ravine part of the flow mark can be prevented. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种在抑制表面裂纹的同时铸造板坯厚度≥380mm的大型铸造板坯的垂直型连铸方法。＆lt; P＆gt;解决方案：在垂直连铸机的铸造速度以≥0.2m/ min厚度铸造厚度≥380mm的厚钢板连续铸造大型横截面铸造板的方法中，作为覆盖用模具粉末在模具中的钢水表面，使用在1,300℃，η≥0.03×D-6（η的单位为泊兹，D为单位为mm）的粘度系数η的模具粉末。以这种方式，可以抑制钢水表面的变化，使钢水面上的流痕（唇标）深度设定为≤1.5mm，并且可以防止在流痕的沟槽部处产生γ晶界裂纹。版权所有（C）2007，JPO＆INPIT

6. 发明专利

JP2007069254A Method for sealing nozzle joining part in continuous casting equipment for steel, and structure of sealed part 有权
标题翻译：密封连续铸钢设备中的喷嘴接头的部件及密封部件的结构方法
公开(公告)号：JP2007069254A
公开(公告)日：2007-03-22
申请号：JP2005260717
申请日：2005-09-08
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OTA MITSUHIKO , UEJIMA YOSHIYUKI , KONDO KATSUMI , SAKAI DAISUKE , SUEMATSU YOSHIAKI
IPC分类号： B22D11/10 , B22D41/50
摘要： PROBLEM TO BE SOLVED: To provide a method for sealing a nozzle joining part in continuous casting equipment for steel, for preventing suction from a joining part between refractory nozzles, and to provide a sealed structure of a nozzle joining part. SOLUTION: In the continuous casting for steel, the nozzle joining part is sealed with a liquid metal. A metal whose affinity with oxygen is higher than that of iron is preferably used as the liquid sealing material. More preferably, Al or an Al alloy is used as the liquid sealing material. Further, as the joined structure of nozzles in the continuous casting method, the one where a liquid sealing material is held by a packing material composed of a monolithic refractory or flame retardant material and nozzles is used. In the above structure, the joined face of the nozzles is preferably provided with a recessed part. COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于密封用于钢的连续铸造设备中的喷嘴接合部分的方法，用于防止来自耐火喷嘴之间的接合部分的抽吸，并且提供喷嘴接合部分的密封结构。
解决方案：在钢的连续铸造中，喷嘴接合部分用液态金属密封。优选使用与氧的亲和性高于铁的金属作为液体密封材料。更优选使用Al或Al合金作为液体密封材料。此外，作为连续铸造法中的喷嘴的接合结构，使用液体密封材料由由整体耐火材料或阻燃材料构成的包装材料和喷嘴保持的结构。在上述结构中，喷嘴的接合面优选设置有凹部。版权所有（C）2007，JPO＆INPIT

7. 发明专利

JP2005002420A Steel having little alumina cluster, and its production method 有权
标题翻译：具有小铝氧化铝簇的钢及其生产方法
公开(公告)号：JP2005002420A
公开(公告)日：2005-01-06
申请号：JP2003167695
申请日：2003-06-12
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MIZOGUCHI TOSHIAKI , UEJIMA YOSHIYUKI , KONDO KATSUMI , YASUI YOJI
IPC分类号： C21C7/06 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide steel which causes little surface flaw and internal defect in the product, such as sliver flaw of a sheet for a car or a home electric appliances, defective material of a thick plate for structural use, lowering of low temperature toughness of a thick plate for wear resistance, and UST defect at a welded part in a steel pipe for an oil well pipe, by preventing coarse alumina cluster causing the product defect from being generated in molten steel and on the surface of Ar bubble, and to provide its production method.
SOLUTION: Oxide base inclusion contains mainly Al
2 O
3 , REM oxide and MgO, wherein the content of the REM oxide is, by mass, ≥0.1%, the content of the MgO is ≥0.1%, and the total content of the REM oxide and the MgO is 0.2 to
摘要翻译：要解决的问题：为了提供在产品中几乎没有表面缺陷和内部缺陷的钢，例如用于汽车或家用电器的片材的条子缺陷，用于结构用途的厚板的缺陷材料，降低通过防止在钢水中产生缺陷的粗大的氧化铝簇和Ar表面上的耐油性的厚板的低温韧性和用于油井管的钢管的焊接部分的UST缺陷泡沫，并提供其生产方法。解决方案：氧化物基底夹杂物主要包含Al 2 O 3 ，REM氧化物和MgO，其中REM氧化物的含量为≥0.1％ MgO的含量≥0.1％，REM氧化物和MgO的总含量为0.2〜<15％。版权所有（C）2005，JPO＆NCIPI

8. 发明专利

JP2005002419A Method for producing steel material with little alumina cluster 有权
标题翻译：生产具有小铝氧化物簇的钢材的方法
公开(公告)号：JP2005002419A
公开(公告)日：2005-01-06
申请号：JP2003167694
申请日：2003-06-12
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MIZOGUCHI TOSHIAKI , UEJIMA YOSHIYUKI , KONDO KATSUMI , YASUI YOJI
IPC分类号： B22D11/00 , B22D11/108 , C21C7/00 , C21C7/04 , C22C38/00 , C22C38/06 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a steel material which does not cause sliver flaw of a thin sheet for car and house electric appliance, defective quality of a thick plate for structural use, a reduction in low temperature toughness of the wear resistant thick plate and has little surface flaw and inner defect such as UST defect at welded part of a steel pipe for oil well pipe, etc., by preventing the coarse alumina cluster causing a defective product from being formed inside the molten steel and on the surface of Ar bubble.
SOLUTION: Mg/T.O (in a mass ratio) is made to be 0.01 to 2 O
3 and MgO and the content of MgO by mass% is desirable to be 0.1-15%. Low melting point oxides of FeO and FeO-Al
2 O
3 existing as binder between the alumina grains of the cluster is reduced with Mg and thus, the coagulation and the coalesce of the alumina grains in the molten steel and on the Ar bubble surface, are restrained.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了提供不会引起汽车和家用电器用薄片的条子缺陷的钢材，结构用厚板的质量劣化，耐磨性的低温韧性降低通过防止在钢水和表面上形成有缺陷的产品的粗大的氧化铝簇，并且在油井管的钢管的焊接部分等处具有很小的表面缺陷和内部缺陷如UST缺陷的Ar气泡。解决方案：用Al或Al-Si脱氧后，通过向钢水中加入Mg，使Mg / T.O（质量比）为0.01〜0.5。钢材中的氧化物基底夹杂物主要含有Al 2 3 和MgO，质量％的MgO含量为0.1〜15％。作为颗粒的氧化铝颗粒之间作为粘合剂存在的FeO和FeO-Al O 3 的低熔点氧化物被Mg还原，因此凝结和聚结钢水中的氧化铝颗粒和Ar气泡表面都受到限制。版权所有（C）2005，JPO＆NCIPI

9. 发明专利

JP2008188640A Continuous casting method for steel with internal crack prevented 有权
标题翻译：具有内部防裂钢的连续铸造方法
公开(公告)号：JP2008188640A
公开(公告)日：2008-08-21
申请号：JP2007026305
申请日：2007-02-06
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： OTA MITSUHIKO , UEJIMA YOSHIYUKI , KONDO KATSUMI , MATSUBA SHIGEKAZU , MIKI DAISUKE , YASUI YOJI
IPC分类号： B22D11/00 , B22D11/16 , B22D11/20 , B22D46/00
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method for a steel with internal cracks prevented where the maximum casting velocity which does not have a risk of generating internal cracks is correctly obtained by calculation in advance regarding various steel kinds, and productivity can be improved as possible.
SOLUTION: When a steel is subjected to continuous casting, the componential values of the steel after secondary refining are analyzed, and, using a microsegregation model in accordance with the value, based on the relation between microsegregation and a solid phase ratio, an internal crack critical strainεcr is calculated. Then, the maximum casting velocity Vc with which the total strainεt upon continuous casting does not exceed the internal crack critical strainεcr is decided, and continuous casting is performed at the maximum casting velocity Vc. As the componential values of the steel after secondary refining, the componential values of ≥5 elements including C, Si, Mn, P and S are analyzed per charge.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种具有内部裂纹的钢的连续铸造方法，其中通过预先对各种钢种进行计算，正确地获得不具有产生内部裂纹的风险的最大铸造速度，并且生产率可以尽可能地改进。解决方案：对钢进行连续铸造时，对二次精炼后的钢的成分值进行分析，根据该微观偏析与固相率的关系，使用微量偏析模型，计算内部裂纹临界应变εcr。然后，确定连续铸造时的总应变εt不超过内部裂纹临界应变εcr的最大铸造速度Vc，以最大铸造速度Vc进行连续铸造。作为二次精炼后的钢的成分值，每次电荷分析包括C，Si，Mn，P和S在内的≥5元素的成分值。版权所有（C）2008，JPO＆INPIT

10. 发明专利

JP2007229736A Vertical type continuous casting method of large cross section cast slab for thick steel plate 有权
标题翻译：大型横截面垂直式连续铸造方法厚钢板
公开(公告)号：JP2007229736A
公开(公告)日：2007-09-13
申请号：JP2006052162
申请日：2006-02-28
申请人： Nippon Steel Corp , 新日本製鐵株式会社
发明人： MIZOGUCHI TOSHIAKI , UEJIMA YOSHIYUKI , KONDO KATSUMI , MIKI DAISUKE , OGAWA KAZUO
IPC分类号： B22D11/00 , B22D11/04 , B22D11/10 , B22D11/115
摘要： PROBLEM TO BE SOLVED: To provide a vertical type continuous casting method with which the grain diameter of equiaxed crystal generated at the center part of a large section cast slab for thick steel plate having ≥380 mm thickness of the cast slab, is made fine to attain improvement in the toughness.
SOLUTION: When the large section cast slab for thick steel plate having ≥380 mm thickness of the cast slab, is cast at ≤0.2 m/min casting speed with the vertical type continuous caster, the position of an immersion nozzle 2 for pouring molten steel into a mold 1 is shifted to the center of the mold and set to the substantial center part to the thickness of the cast slab to cast the molten steel. In this way, the molten steel pouring flow is uniformly collided with the standard surface side and the shifting surface side and the many nuclei of the equiaxed crystals are generated and the grain diameters of the equiaxed crystals are made fine and the toughness can be improved.
COPYRIGHT: (C)2007,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种垂直型连续铸造方法，其中在铸坯厚度≥380mm的厚钢板的大型铸坯的中心部分产生的等轴晶体的晶粒直径为使韧性得到改善。
解决方案：当铸件厚度≥380mm的厚钢板的大型铸造板坯与垂直型连铸机以不到0.2m / min的铸造速度铸造时，浸入式喷嘴2的位置为将钢水浇注到模具1中移动到模具的中心，并将其设置到铸坯的大致中心部分以铸造钢水。以这种方式，钢水浇注流与标准表面侧和变位面一致地发生，并且产生等轴晶体的许多核，并且等轴晶体的晶粒直径变细，并且可以提高韧性。版权所有（C）2007，JPO＆INPIT

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