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1. 发明专利

JP2008093711A Continuous casting method of steel 有权
标题翻译：钢的连续铸造方法
公开(公告)号：JP2008093711A
公开(公告)日：2008-04-24
申请号：JP2006279116
申请日：2006-10-12
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： ITO YOSHIKI , KOGA MICHIKAZU , WATANABE SHINSUKE , MISHIMA TAKESHI , TANIZAWA YOSHINORI , SASAME KINGO , SAZUKA HIROSHI , KAWAMURA TADAYASU
IPC分类号： B22D11/128
摘要： PROBLEM TO BE SOLVED: To obtain sufficient improvement effect of internal quality of steel without requiring complicated device configuration.
SOLUTION: In the continuous casting method of the steel, the amount and the thrusting force of rolling reduction are controlled for each pair of reduction rolls or for each segment including a plurality of pairs of reduction rolls, when conducting rolling-reduction of a cast slab 2 along a thickness direction using a plurality of pairs of reduction rolls in the upstream side and the downstream side of a crater end where solidification in the inner part of a cast slab is completed. When applying rolling-reduction to the cast slab 2, the rolling-reduction is conducted such that the amount of the rolling-reduction of the cast slab 2 executed by each of four pairs of reduction rolls or each of segments 1a, 1b reaches the target amount of rolling-reduction. Thereafter, the pressure thrusting value acting on each of four pairs of reduction rolls or each of segments 1a, 1b is controlled so as to become the target pressure thrusting value, by increasing or decreasing the amount of the rolling-reduction of the cast slab 2 executed by each of four pairs of reduction rolls or each of segments 1a, 1b. Thus, generation of center segregation and porosity are effectively prevented, so that a cast slab having excellent internal quality is obtained.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了获得钢的内部质量的足够的改进效果，而不需要复杂的装置构造。解决方案：在钢的连续铸造方法中，对于每对还原辊或包括多对还原辊的每个段控制轧制量的量和推力，当进行轧制还原时铸坯2沿着厚度方向使用多个成对的压延辊，在铸坯的内部部分固化的火山口端的上游侧和下游侧完成。当对铸坯2进行轧制还原时，进行轧制还原，使得由四对还原辊或各段1a，1b中的每一个执行的铸坯2的轧制还原量达到目标轧制量减少。此后，通过增加或减少铸造板坯2的轧制量减少量来控制作用在四对还原辊或段1a，1b中的每一个上的压力推压值，以便成为目标压力推压值由四对还原辊或段1a，1b中的每一个执行。因此，有效地防止了中心偏析和孔隙率的产生，从而获得了具有优异内部质量的铸坯。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JPH0558042B2 失效
公开(公告)号：JPH0558042B2
公开(公告)日：1993-08-25
申请号：JP17552685
申请日：1985-08-09
申请人： SUMITOMO METAL IND
发明人： YOSHIHARA KAKUJI , MISHIMA TAKESHI , NAKAI TAKESHI , FUNAKI HIROYUKI
IPC分类号： B21B1/00 , B21B1/02 , C21D8/00

3. 发明专利

JPH0461742B2 失效
公开(公告)号：JPH0461742B2
公开(公告)日：1992-10-01
申请号：JP2167288
申请日：1988-02-01
申请人： SUMITOMO METAL IND
发明人： SEKINO KAZUTO , MISHIMA TAKESHI
IPC分类号： B22D11/16

4. 发明专利

JPH03146246A SUBMERGED NOZZLE FOR CONTINUOUS CASTING 失效
公开(公告)号：JPH03146246A
公开(公告)日：1991-06-21
申请号：JP28657789
申请日：1989-11-02
申请人： TOSHIBA CERAMICS CO , SUMITOMO METAL IND
发明人： SHIBATA SHOJI , TOKUNAGA KUNISHIGE , HASEBE NOBUHIRO , HASEGAWA MITSUMASA , MISHIMA TAKESHI , SAKASHITA TSUTOMU , SEKINO KAZUTO , TAKAHASHI AKIRA , NAKAJIMA HIDEMASA
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To obtain a submerged nozzle for continuous casting having simple constitution without disturbing molten metal surface level and without developing longitudinal crack to a cast slab by arranging a nozzle hole having the specific hollow cross sectional area and discharging holes having the specific total hole cross sectional area. CONSTITUTION:In the nozzle body 10 composed of refractory having excellent heat impact resistance, etc., heat insulating layer 13 is arranged, at need, and further, outer circumferential slag line part 14 is constituted of high corrosion resistance refractory and one pair of the discharging holes 12 communicating with the nozzle hole 11 are opened at the symmetrical position of lower side part. In the submerged nozzle for continuous casting having the above structure, the hollow cross sectional area in the above nozzle hole 11 is made to be 2800-5500mm and the total hole cross sectional area in the above discharging holes 12 is made to be 5000-15000mm . By this method, contact of the nozzle hole wall with molten steel is made to little and the optimum discharging velocity is obtd. and the power in a slab shaped mold is suitably stirred without involution and the temp. thereof is uniformized. By this method, the development of longitudinal crack in the cast slab caused by insufficient slagging of the powder is prevented.

5. 发明专利

JPH01197051A METHOD FOR DETECTING PERFECT SOLIDIFIED POSITION IN CONTINUOUS CASTING SLAB 失效
公开(公告)号：JPH01197051A
公开(公告)日：1989-08-08
申请号：JP2167288
申请日：1988-02-01
申请人： SUMITOMO METAL IND
发明人： SEKINO KAZUTO , MISHIMA TAKESHI
IPC分类号： B22D11/16
摘要： PURPOSE:To detect perfect solidified position of a cast slab by suitably making free of upper following rolls in pinch roll zone upward and measuring whether bulging force is loaded or not, with a load cell arranged to upper bearing part. CONSTITUTION:The rolls 3C, 3E in the upper following rolls 3 before about 1-2m from machine end are alternately made to free upward by distance alpha. At the non-solidified part of the molten steel, the cast slab S is brought into contact with the rolls 3C, 3E caused by bulging with molten metal pressure and the equal load and rotation as the other rolls are obtd., but after perfectly solidifying, the rolls 3C, 3E is not brought into contact with the cast slab S caused by no bulging, and the load and rotation are eliminated. By this method, perfect solidified position in the cast slab can be detected.

6. 发明专利

JPH09314297A DEVICE FOR TREATING CAST SLAB AT OUTLET SIDE OF CONTINUOS CASTING EQUIPMENT 失效
公开(公告)号：JPH09314297A
公开(公告)日：1997-12-09
申请号：JP15319196
申请日：1996-05-24
申请人： SUMITOMO HEAVY INDUSTRIES , SUMITOMO METAL IND
发明人： HORIMOTO KOJI , IKEBE KIHACHI , MISHIMA TAKESHI
IPC分类号： G01N1/04 , B22D11/12 , B22D11/126 , B22D11/16
摘要： PROBLEM TO BE SOLVED: To execute the treatment of a cast slab in a short time without developing any trouble to the flow of following cast slab by fully automatically executing the cut-off and the discharge of a crop at the end part of the cast slab cut to a prescribed length and the cut-off and the taking of a sample piece on-line. SOLUTION: Uncutting continuous cast slab from a continuous casting machine is fed to a primary cutter 3 through a pinch roll group 1 and cut to the prescribed length. Then, the fixed length cast slab having a crop at the cut front end part or rear end part is fed to a side feeding device 15 through roller tables 4, 16 and side-fed to one side of a main line, and the crop is cut off with a secondary cutter 7, and the fixed length cast slab is returned back again to the main line with the side feeding device 15 and transported to the main line on the apposite side with a side feeding device 17 for taking out and transporting. Further, the fixed length cast slab with a sample is transported from the primary cutter 3 to the ternary cutter 13, and the sample is cut off and the remaining fixed length cast slab is fed back with roller tables 14, 16 and fed to the opposite side main line with the side feeding device 17 for taking out and transporting. By this constitution, the productive efficiency of the fixed length cast slab can be improved.

7. 发明专利

JPS6240960A METHOD FOR PREVENTING CRACK IN HOT DIRECT ROLLING STAGE OF STEEL INGOT 失效
公开(公告)号：JPS6240960A
公开(公告)日：1987-02-21
申请号：JP18144185
申请日：1985-08-19
申请人： SUMITOMO METAL IND
发明人： NAKAI TAKESHI , KAWASAKI MORIO , MAEHARA YASUHIRO , FUNAKI HIROYUKI , YOSHIHARA KAKUJI , MISHIMA TAKESHI
IPC分类号： C21D8/00 , B21B1/00 , B21B1/02 , B21B3/00 , B22D11/12
摘要： PURPOSE:To stably obtain a desired product from steel products of steel kinds having an easy tendency to cracking without any problem at all by casting a low alloy steel of which the value calculated from the component compsn. of steel by using the specific equation is a specific value to an ingot at the specific surface temp. at the bend straightening point and rolling the ingot as it is without cooling the same. CONSTITUTION:The low alloy steel of which the value of the Cp calculated by the equation Cp=C(%)+Mn(%)/50+Ni(%)/25+Cu(%)/44+N(%)/1.7 (where % is based on weight) is at least in a 0.13-0.23 range is used in continuous casting of the steel and the ingot is cast from such steel by maintaining the ingot surface temp. at the bend straightening point at >=900 deg.C

8. 发明专利

JPS6234602A METHOD FOR PREVENTING CRACK FLAW IN HOT ROLLING STAGE 失效
公开(公告)号：JPS6234602A
公开(公告)日：1987-02-14
申请号：JP17552685
申请日：1985-08-09
申请人： SUMITOMO METAL IND
发明人： YOSHIHARA KAKUJI , MISHIMA TAKESHI , NAKAI TAKESHI , FUNAKI HIROYUKI
IPC分类号： B21B1/00 , B21B1/02 , C21D8/00
摘要： PURPOSE:To prevent the generation of the surface crack of a steel ingot by dividing a total rolling reduction ratio by specific temp. conditions and executing rolling in the stage of subjecting the steel ingot to direct rolling or hot rolling by hot charge rolling. CONSTITUTION:The rolling up to =500 deg.C surface temp. The steel ingot is cooled at a cooling rate of o.1-10 deg.C/sec down to the Ar3 point -80 deg.C surface temp. for the part where the total rolling reduction ratio exceeds 1.3, then the ingot is hot rolled in the temp. range of the Ar3+50 deg.C-Ar3 point-100 deg.C. The generation of the crack on the surface of the steel ingot is prevented by hot rolling of the steel ingot.

9. 发明专利

JPH09239507A SEGMENT EXCHANGING EQUIPMENT OF CONTINUOUS CASTING MACHINE 失效
公开(公告)号：JPH09239507A
公开(公告)日：1997-09-16
申请号：JP8460896
申请日：1996-03-12
申请人： SUMITOMO METAL IND , SUMITOMO HEAVY INDUSTRIES
发明人： IKEBE KIHACHI , MISHIMA TAKESHI , OZAKI JUNICHI
IPC分类号： B66C1/34 , B22D11/128 , B66C17/06
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of the segment exchanging work, and to simplify an equipment by installing a pair of guide rails on each side of a roller apron corresponding to a segment, pulling out the segment to the inner side of a curved arc along a guide rail, and inserting another segment into the previous position. SOLUTION: A pair of guide rails 20 on each side extending to an inner side from an outer side of an arc of a roller apron 12 corresponding to a plurality of segments 13 to constitute the roller apron 12 of a vertical bend type or curved type continuous casting machine are installed. A pair of guide rollers 13a to be engaged with a guide rail 20 are provided in the radial direction of a curved arc of the segment 13 with a clearance, and the segments 13 are pulled out to an inner side of the curved arc along the guide rail 20 on each side, and new segments are inserted in the original position. The guide rails 20 are located on an outer circumferential part of the curved arc of the roller apron 12, and are of the fixed type in which an inclined part directed in the radial direction of the curved arc is connected to a vertical part located on an inner circumferential part of the arc.

10. 发明专利

JPS6240902A METHOD FOR PREVENTING CRACK IN DIRECT HOT ROLLING OF CONTINUOUSLY CAST STEEL INGOT 失效
公开(公告)号：JPS6240902A
公开(公告)日：1987-02-21
申请号：JP18144285
申请日：1985-08-19
申请人： SUMITOMO METAL IND
发明人： NAKAI TAKESHI , KAWASAKI MORIO , MAEHARA YASUHIRO , FUNAKI HIROYUKI , YOSHIHARA KAKUJI , MISHIMA TAKESHI
IPC分类号： C21D8/00 , B21B1/00 , B21B1/02 , B21B3/00 , B22D11/12
摘要： PURPOSE:To prevent the generation of a crack and to reduce the cost of the rolling material from the improved yield by controlling the surface temp. of a continuously cast steel ingot of a low alloy steel specified in the range of C equiv. within the specific width at the end of the ingot in the direct hot rolling of said steel ingot. CONSTITUTION:The continuously cast low alloy ingot of which the equiv. value [CP] expressed by formula I taking weight % of alloy elements Mn, Ni, Cu, N to sharply affect the peritectic point for generating the gamma phase in the solidifying stage of the molten metal into account is 0.13-0.23 and with which the crack is liable to arise during rolling by the coarsening of the gamma phase is delayed in cooling within the 50-200mm range from the ingot end by the influence of the molten steel discharge flow and is liable to have the coarsened gamma phase in the case of subjecting such steel ingot to the direct hot rolling. The temp. within 200mm from the ingot end is consequently heated by a heater to >=900 deg.C or cooled by water down to

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