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1. 发明专利

JP2012101255A Continuous casting method for steel 有权
标题翻译：钢的连续铸造方法
公开(公告)号：JP2012101255A
公开(公告)日：2012-05-31
申请号：JP2010252475
申请日：2010-11-11
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： OKADA NOBUHIRO , YAMANAKA AKIHIRO , TAGUCHI KENJI , TAJIMA NAOKI
IPC分类号： B22D11/115 , B22D11/128
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method for steel, by which steel having suppressed central segregation can be manufactured even if the drawing speed and the like are changed in continuous casting using a reduction method for a cast slab containing a non-solidified part.SOLUTION: In the continuous casting method for steel, a cast slab containing a non-solidified part is subjected to rolling-reduction, and further the molten steel in the non-solidified part is made to flow and stirred using an electromagnetic stirring apparatus on the upper stream side of the position of rolling-reduction in the casting direction. A unidirectional stirred flow, which is generated by the electromagnetic stirring apparatus and goes from one of the short sides of the cast slab to the other short side, is reversed for every predetermined direction-holding time T0. The flow of the molten steel is controlled so that the average flow speed U of molten steel that is expressed by formula (1) below is made ≥8.6 cm/s, and T0/T that is the ratio between the direction-holding time T0 and whole width moving time T (T=W/U, wherein W is the width of a non-solidified part of a cast slab) satisfies 1.0≤T0/T≤4.0. Formula (1) is represented: U=A(HF), wherein H is the depth [m] of a non-solidified part of a cast slab, F is the Lorentz force density [N/m] at the center of a cross-section of a cast slab, and A and n are constants to be defined by equipment.
摘要翻译：待解决的问题：为了提供一种钢的连续铸造方法，即使在使用含有（C）的铸坯的还原法的连续铸造中改变拉拔速度等，也可以制造抑制中心偏析的钢非固化部分解决方案：在钢的连续铸造方法中，将含有非固化部分的铸造板坯进行轧制还原，并且使非电凝部分中的钢水通过电磁搅拌流动和搅拌设备在铸造方向上的轧制还原位置的上游侧。由电磁搅拌装置产生的单向搅动流从铸坯的短边中的一侧向另一短边移动，每隔规定的方向保持时间T0反转。控制钢水的流动，使得由下式（1）表示的钢水的平均流速U为≥8.6cm/ s，作为方向保持时间T0 整体宽度移动时间T（T = W / U，其中W为铸坯的非凝固部分的宽度）满足1.0≤T0/T≤4.0。表示式（1）：U = A（HF） n 其中H是铸坯的非固化部分的深度[m]，F是洛伦兹强度密度[N / m 3 ]在铸造板的横截面的中心，A和n是要由设备定义的常数。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2010247160A Method for continuously casting steel and cast slab produced by the method 有权
标题翻译：方法生产的连续铸造钢和铸坯的方法
公开(公告)号：JP2010247160A
公开(公告)日：2010-11-04
申请号：JP2009096099
申请日：2009-04-10
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： HIRASHIRO TADASHI , YAMANAKA AKIHIRO , TAJIMA NAOKI , OTA KOZO , OKADA NOBUHIRO
IPC分类号： B22D11/20 , B22D11/103 , B22D11/128 , B22D11/18
摘要： PROBLEM TO BE SOLVED: To provide a continuous-casting method capable of preventing the deterioration of quality at the boundary part of a sequence casting.
SOLUTION: In the continuous-casting method, a cast-slab containing non-solidified part is rolling-reduced by using rolling-reduction pair set in the continuous-casting machine or the end part of the machine. When the sequence casting is performed, the molten steel weight in a tundish at the interval from the supplying stop of first charging of molten steel to the supplying start of after charging of molten steel secures ≥2/3 of the molten steel weight when the continuous-casting in the steady state is performed, and the lowering of the over-heat degree of the molten steel in the tundish, is restrained within ≤10°C at this timing. Further, the molten steel casting speed at the interval from the supplying stop of the first charging of molten steel to the supplying start of the after charging of molten steel secures the same casting speed as the casting speed in the steady state, and the rolling-reduction rate when the unsolidified part in the cast slab, in which the molten steel corresponding to the molten steel exists in the tundish, is cast at the interval from after supplying stop of the first charging of molten steel to the supplying start of the after charging of molten steel is made to target rolling-reduction rate or higher necessary to the discharge of non-solidified concentrating molten steel.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种能够防止顺序铸造的边界部分的质量劣化的连续铸造方法。解决方案：在连续铸造方法中，通过使用设置在连续铸造机或机器的端部中的滚动减少对，将含有非固化部件的铸造板坯进行轧制。当进行顺序铸造时，从第一次充入钢水的供给停止点到钢水充填开始之间的中间包中的钢水重量，当连续的钢水重量保持≥2/ 3 进行稳定状态的浇铸，并且在该时刻将中间包中的钢水的过热度的降低抑制在≤10℃以内。此外，从钢水的第一次充填的供给停止到钢水的充填的供给开始之间的间隔的钢水浇铸速度确保与稳定状态下的铸造速度相同的铸造速度，当钢水中对应于钢水的钢水中的非固化部分在钢水的第一次充填停止之后到后充电的供给开始之间的间隔被铸造时的压下率使钢水的目标在不凝固的浓缩钢水排出所需的压下率以上。版权所有（C）2011，JPO＆INPIT

3. 发明专利

JP2010179342A Method for continuously casting steel, and cast slab manufactured by the same method 有权
标题翻译：连续铸钢的方法和由该方法制造的铸件
公开(公告)号：JP2010179342A
公开(公告)日：2010-08-19
申请号：JP2009025593
申请日：2009-02-06
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： HIRASHIRO TADASHI , YAMANAKA AKIHIRO , OKADA NOBUHIRO , TAJIMA NAOKI , OTA KOZO
IPC分类号： B22D11/128 , B22D11/115 , B22D11/20
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method for manufacturing a cast slab having stable internal quality during a long time operation by improving the dilution of concentration of segregated components by stirring a molten metal.
SOLUTION: In a method for continuously casting steel, rolling reduction is applied to a cast slab containing a non-solidified part with use of reduction rolls arranged in a continuous casting machine. An electromagnetic stirring device for stirring the molten metal in the non-solidified part of the cast slab is arranged on the upper stream side of the reduction roll pair in the casting direction. The flowing direction of the molten metal in the non-solidified part in the width-direction of the cast slab is periodically changed in one and the other direction of the width-direction of the cast slab. An applying time of current to the electromagnetic stirring device is set such that each of an accumulated flowing distance D of the molten metal in the non-solidified part during the flowing period in the one direction and in the other direction is made equal to or longer than the width Wo of the non-solidified part of the cast slab at the position where the non-solidified part is stirred by the electromagnetic stirring device.
COPYRIGHT: (C)2010,JPO&INPIT
摘要翻译：待解决的问题：提供一种连续铸造方法，用于通过搅拌熔融金属来改善偏析组分的浓度稀释，从而在长时间的操作中制造具有稳定内部质量的铸坯。解决方案：在用于连续铸造钢的方法中，使用连续铸造机中的还原辊将轧制压下应用于含有非固化部分的铸造板坯。用于搅拌铸坯的非固化部分中的熔融金属的电磁搅拌装置在铸造方向上设置在还原辊对的上游侧。在铸坯的宽度方向上的非凝固部分中的熔融金属的流动方向在铸坯的宽度方向的一个方向和另一个方向上周期性地变化。将电流施加到电磁搅拌装置的施加时间被设定为使得在一个方向和另一个方向上的流动期间的非固化部分中的熔融金属的累积流动距离D分别等于或等于比通过电磁搅拌装置搅拌非凝固部分的位置处的铸坯的未固化部分的宽度Wo更大。版权所有（C）2010，JPO＆INPIT

4. 发明专利

JP2012223809A Method for continuously casting steel 审中-公开
标题翻译：连续铸钢的方法
公开(公告)号：JP2012223809A
公开(公告)日：2012-11-15
申请号：JP2011095608
申请日：2011-04-22
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： TAJIMA NAOKI , OTA KOZO , YAMANAKA AKIHIRO , HIRASHIRO TADASHI , TAGUCHI KENJI
IPC分类号： B22D11/128 , B22D11/12 , B22D11/16 , B22D11/20
摘要： PROBLEM TO BE SOLVED: To provide a method for continuously casting steel that can perform stable operation while securing the internal quality of a continuously cast slab by controlling a roll space.SOLUTION: The method for continuously casting steel by carrying out high rolling reduction of a cast slab using at least a pair of reduction rolls includes detecting the rolling reduction force and roll space of the reduction rolls under rolling reduction of the cast slab to always maintain the rolling reduction force of the reduction rolls to at least 90% of the use limit rolling reduction force and to set the target value of the roll space of the reduction rolls to a value always smaller than the measured value according to the measured value of the detected roll space. The target value of the detected roll space is preferably set to a value always smaller within a range of 0.1 mm or more and less than 10.0 mm than the measured value of the roll space. Further, when the measured value of the roll space reaches the target value, the target value is preferably changed to a smaller value.
摘要翻译：要解决的问题：提供一种连续铸造钢的方法，其可以通过控制轧辊空间确保连续铸造的板坯的内部质量而能够进行稳定的操作。解决方案：通过使用至少一对还原辊进行铸坯的高压轧来连续铸造钢的方法包括：在铸坯的轧制压下时检测轧制压下力和轧制空间，始终将还原辊的轧制压力保持在使用极限轧制压缩力的至少90％，并且将轧制辊的滚动空间的目标值设定为比测量值始终小的值检测到的滚动空间。检测出的滚动空间的目标值优选设定为比滚动空间的测量值在0.1mm以上且小于10.0mm的范围内始终更小的值。此外，当滚动空间的测量值达到目标值时，目标值优选地变为较小的值。版权所有（C）2013，JPO＆INPIT

5. 发明专利

JP2010189712A Continuously cast slab of steel for b-containing high strength thick steel plate, and method for producing the same 有权
标题翻译：含有高强度厚钢板的钢的连续铸造钢板及其制造方法
公开(公告)号：JP2010189712A
公开(公告)日：2010-09-02
申请号：JP2009035427
申请日：2009-02-18
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： KATO TORU , HIRASHIRO TADASHI , TAJIMA NAOKI , YANO YUICHI , KIMURA TAKASHI
IPC分类号： C22C38/00 , B22D11/00 , B22D11/20 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a method for preventing cracks and flaws generated on the surface of a slab or a steel plate upon continuous casting or hot rolling for a B-containing high strength thick steel plate.
SOLUTION: The continuously cast slab has a composition containing, by mass, 0.10 to 0.18% C, 0.10 to 0.4% Si, 0.5 to 2.0% Mn, ≤0.020% P, ≤0.003% S, 0.005 to 0.03% Ti, 0.005 to 0.06% Al, 0.0005 to 0.0050% B and 0.0015 to 0.007% N, and further containing one or more kinds selected from 0.1 to 0.5% Cu, 0.3 to 2.5% Ni, 0.1 to 0.8% Mo, 0.01 to 0.1% V, 0.005 to 0.05% Nb and 0.0005 to 0.0060% Ca, and the balance Fe with impurities, and in which the equilibrium precipitation starting temperature of BN is
摘要翻译：要解决的问题：提供一种用于防止在含有B的高强度厚钢板的连续铸造或热轧时在板坯或钢板的表面上产生的裂纹和缺陷的方法。
解决方案：连续铸造的板坯具有以质量计含有0.10〜0.18％的C，0.10〜0.4％的Si，0.5〜2.0％的Mn，≤0.020％的P，≤0.003％的S，0.005〜0.03％的Ti ，0.005〜0.06％的Al，0.0005〜0.0050％的B和0.0015〜0.007％的N，进一步含有选自0.1〜0.5％的Cu，0.3〜2.5％的Ni，0.1〜0.8％的Mo，0.01〜0.1％ V，0.005〜0.05％的Nb和0.0005〜0.0060％的Ca，余量为Fe与杂质，其中BN的平衡析出开始温度<1,150℃或BN在1000℃下的平衡析出量为<0.0035 质量％，铸造结束后的BN含量为0.0003〜0.0030质量％。版权所有（C）2010，JPO＆INPIT

6. 发明专利

JP2011098388A Continuous casting method for steel and extra-thick steep plate 有权
标题翻译：钢和超厚板的连续铸造方法
公开(公告)号：JP2011098388A
公开(公告)日：2011-05-19
申请号：JP2009256460
申请日：2009-11-09
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： HIRASHIRO TADASHI , YAMANAKA AKIHIRO , TAJIMA NAOKI , OTA KOZO , YANO YUICHI
IPC分类号： B22D11/128 , B22D11/00 , B22D11/16 , B22D11/20 , C22C38/00 , C22C38/58
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method capable of producing a slab having stable inside quality by suppressing the occurrence of fine cracks caused by rolling reduction in the boundary between a negatively-segregated part and a bulk part. SOLUTION: Regarding the continuous casting method in which a slab including an un-solidified part is subjected to rolling reduction using at least a pair of rolling reduction rolls arranged in a continuous casting machine or at the edges of the machine, and, solidified shells on both the sides in the thickness direction of the slab are press-stuck to form a negatively-segregated part in the vicinity of the central part in the thickness direction of the slab after solidification, a product between the thickness D(mm) of the negatively-segregated part in the thickness direction of the slab and the content of an S component [S](ppm) in the steel is allowed to satisfy 0 COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：解决的问题：提供一种连续铸造方法，其能够通过抑制由负极偏析部分和块状部分之间的边界中的轧制减少引起的细小裂纹的发生而产生具有稳定内部质量的板坯。解决方案：关于使用至少一个设置在连续铸造机中或机器边缘处的至少一对轧制压下辊来对含有未固化部分的板坯进行轧制压下的连续铸造方法，在板坯的厚度方向的两侧的固化壳被压固，在凝固后在板坯的厚度方向上的中央部附近形成负偏析部，厚度D（mm）的板坯厚度方向上的偏析部分和钢中S成分（S）的含量满足0 <[S]×D≤60。版权所有（C）2011，JPO＆INPIT

7. 发明专利

JP2011140044A Continuous casting method for steel 有权
标题翻译：钢的连续铸造方法
公开(公告)号：JP2011140044A
公开(公告)日：2011-07-21
申请号：JP2010002475
申请日：2010-01-08
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： TAJIMA NAOKI , OTA KOZO , YAMANAKA AKIHIRO , HIRASHIRO TADASHI
IPC分类号： B22D11/10 , B22D11/12 , B22D11/128 , B22D11/20
摘要： PROBLEM TO BE SOLVED: To provide a continuous casting method for a steel which can produce a slab subjected to unsolidification high rolling reduction at a high yield. SOLUTION: In the continuous casting method for a steel, a slab including an unsolidified part is subjected to high rolling reduction using at least a pair of rolling reduction rolls. As a pre-casting steel kind, a steel kind comprising alloy elements is used, and, as a post-casting steel kind, a steel kind having the content of the alloy elements lower than the alloy element content of the pre-casting steel kind or a steel kind not containing the alloy elements is used, and continuous continuous casting is performed. When this method is performed, it is preferable that, in a tundish as a vessel for feeding a molten steel into a mold, even regarding the slab at the boundary part formed by the intermingling of the respective component compositions of the pre-casting steel kind and the post-casting steel kind, high rolling reduction is performed continuously to the constant part in the pre-casting steel kind, and, the pair of rolling reduction rolls are released during the casting of the post-casting steel king or upon the end of the casting, and the rolling reduction is finished. COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种可以以高产率生产出高度轧制压实的非固化的板坯的连续铸造方法。解决方案：在钢的连续铸造方法中，使用至少一对轧制压下辊对包括非固化部分的板坯进行高轧制压下。作为预铸钢种，使用包含合金元素的钢种，并且作为后铸钢种，具有低于预铸钢种的合金元素含量的合金元素含量的钢种或者不使用合金元素的钢种，进行连续连续铸造。当进行这种方法时，优选的是，在作为用于将钢水供给到模具中的容器的中间包中，即使在通过预铸钢种的各组分组成混合形成的边界部分的板坯和后铸钢种类，在预铸钢种类中连续进行高压缩还原，并且在铸造铸钢之王或结束时，一对轧制压下辊被释放的铸造，并且轧制减少完成。版权所有（C）2011，JPO＆INPIT

8. 发明专利

JP2012187611A Continuous casting method of steel 有权
标题翻译：钢的连续铸造方法
公开(公告)号：JP2012187611A
公开(公告)日：2012-10-04
申请号：JP2011054075
申请日：2011-03-11
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： HANAO MASAHITO , OTA KOZO , TAJIMA NAOKI
IPC分类号： B22D11/108 , B22D11/00 , B22D11/124 , B22D11/16 , B22D11/22
摘要： PROBLEM TO BE SOLVED: To prevent any longitudinal crack caused by the initial solidification phenomenon in a mold, in the continuous casting of sub-peritectic and low-alloy steel.SOLUTION: In the continuous casting method of hypo-peritectic and low-alloy steel, a vertical-bending type continuous casting machine is used. In the method, mold flux is used, which is basically composed of CaO, SiO, alkaline metal oxide, and fluorine, while basicity (CaO/SiO) as the mass-concentration ratio of CaO to SiOis ≥1.6, the solidification point is ≥1,250°C, and the viscosity at 1,300°C is ≤1 poise. The specific water amount for secondary cooling is set to be ≤0.20 liter/kg on the downstream side in the drawing direction of a cast slab from the mold, and at a vertical part on the upstream side in the drawing direction of the cast slab from a bending part.
摘要翻译：要解决的问题：为了防止在模具中，在包晶和低合金钢的连续铸造中由于初始凝固现象引起的纵向裂纹。
解决方案：在低合金和低合金钢的连铸方法中，使用垂直弯曲型连铸机。在该方法中，使用基本上由CaO，SiO 2 ，碱金属氧化物和氟组成的模具通量，而碱度（CaO / SiO 2 ），CaO与SiO 2 的质量浓度比≥1.6，凝固点≥1,250℃，1,300° C为≤1泊。二次冷却的比水量从铸模在铸坯的拉拔方向的下游侧以及在铸坯的拉拔方向的上游侧的垂直部分的下游侧为≤0.20L/ kg 弯曲部分。版权所有（C）2013，JPO＆INPIT

9. 发明专利

JP2011042859A Continuous casting method for low alloy steel for corrosion resistant thick plate, and continuously cast slab 有权
标题翻译：用于耐腐蚀厚板的低合金钢的连续铸造方法和连续铸造
公开(公告)号：JP2011042859A
公开(公告)日：2011-03-03
申请号：JP2009193516
申请日：2009-08-24
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： YOSHIDA NAOTADA , TAGUCHI KENJI , TAJIMA NAOKI
IPC分类号： C22C38/00 , B22D11/00 , C22C38/16
摘要： PROBLEM TO BE SOLVED: To prevent the generation of surface flaws upon continuous casting for a low alloy plate for a corrosion resistant thick plate to which, by mass, 0.09 to 0.20% C and 0.05 to 0.50% Sn are added.
SOLUTION: A low alloy steel for a corrosion resistant thick plate comprising, by mass, 0.09 to 0.20% C, 0.05 to 1.00% Si, 0.20 to 2.50% Mn, ≤0.05% P, ≤0.02% S, 0.003 to 0.1% Al, 0.05 to 0.50% Sn, 0.01 to 0.20% Cu and 0.01 to 0.20% Ni, and the balance Fe with impurities is cast in such a manner that the value of componential ratios in mass%, Cu/Sn is controlled to 0.02 to 0.5, and the value of (Cu+Ni)/Sn is controlled to 0.04 to 0.7. In this way, the low alloy steel for a corrosion resistant thick plate to which 0.09 to 0.20% C and 0.05 to 0.50% Sn are added can be continuously cast with the generation of surface flaws prevented. Further, even in hot rolling in the post-step, a continuously cast slab having low crack sensitivity can be provided.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：为了防止在连续铸造时产生用于耐蚀厚板的低合金板的表面缺陷，质量为0.09至0.20％的C和0.05至0.50％的Sn。解决方案：一种用于耐腐蚀厚板的低合金钢，其质量为0.09至0.20％的C，0.05至1.00％的Si，0.20至2.50％的Mn，≤0.05％的P，≤0.02％的S，0.003至 0.1％的Al，0.05〜0.50％的Sn，0.01〜0.20％的Cu和0.01〜0.20％的Ni，余量为Fe的杂质以这样的方式铸造，即将组成比例的质量％Cu / Sn控制为 0.02〜0.5，（Cu + Ni）/ Sn的值控制在0.04〜0.7。以这种方式，可以连续铸造用于耐腐蚀厚板的低合金钢，其中添加了0.09至0.20％的C和0.05至0.50％的Sn，从而防止了表面缺陷的产生。此外，即使在后续步骤中的热轧中，也可以提供具有低裂纹灵敏度的连续铸造板坯。版权所有（C）2011，JPO＆INPIT

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