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1. 发明专利

JP2006184101A Inclusion identification method, identification apparatus, metal material manufacturing method 有权
标题翻译：包含识别方法，识别装置，金属材料制造方法
公开(公告)号：JP2006184101A
公开(公告)日：2006-07-13
申请号：JP2004376929
申请日：2004-12-27
申请人： Sumitomo Metal Ind Ltd , 住友金属工業株式会社
发明人： KASAI NOBUFUMI , NISHI TAKAYUKI
IPC分类号： G01N29/44 , G01N29/04
摘要： PROBLEM TO BE SOLVED: To identify the type of inclusions present inside continuously cast strands, on the basis of defect data acquired by the results of ultrasonic flaw detection.
SOLUTION: The type of inclusion, present in the continuously case strands 1, is identified by identifying inclusions among defects present in the continuously case strands 1 by the approximate matching, between the degree of inclination of straight lines of a double exponential distribution, straight lines of Hazen's fraction, or straight lines of Thomas's fraction, by extreme-value statistics on measurement values of the size of all the defects present in one sample of the continuously case strands 1, acquired by ultrasonic flaw detection performed on the continuously case strands 1; and the degree of inclination, determined for each type of inclusions, in advance, of straight lines of a double exponential distribution, straight lines of Hazen's fraction, or the straight lines of Thomas's fraction by extreme-value statistics on the measurement values of the size of all the defects present in continuous cast strands, manufactured by manufacturing processes equivalent to those by which the continuously case strands 1 have been manufactured.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：根据超声波探伤结果获得的缺陷数据，确定连续铸造股线内存在的夹杂物的种类。
解决方案：存在于连续案例股1中的夹杂物的类型通过通过近似匹配来识别连续案例股1中存在的缺陷中的夹杂物，双指数分布的直线的倾斜度，直线Hazen的分数，或直线的托马斯分数，通过对连续情况线1的一个样本中存在的所有缺陷的尺寸的测量值进行极值统计，通过对连续情况下执行的超声波探伤获取获得的极大值股1; 和预测的每种类型的夹杂物的倾斜程度，预先确定双指数分布的直线，Hazen分数的直线或托马斯分数的直线，通过极值统计学对尺寸的测量值存在于连续铸造股线中的所有缺陷，通过与制造连续壳体股1相同的制造工艺制造。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JPH0760424A CONTINUOUS CASTING METHOD 失效
公开(公告)号：JPH0760424A
公开(公告)日：1995-03-07
申请号：JP23086393
申请日：1993-08-24
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , TANIZAWA YOSHINORI , OTA KOZO
IPC分类号： B22D11/128 , B22D11/20
摘要： PURPOSE:To establish a continuous casting method, by which a cast slab having sound and high quality without seeing an internal defect of center segregation, etc., can stably be produced. CONSTITUTION:In the continuous casting of a metal, the temp. distribution of the cast slab continuously drawn from a mold 3 opened at the upper and the lower part is made to be the surface temp. at the corner part to the surface temp. at the center part in the width ratio of 0.95-1.1 by heating the ranges from both corner parts to at most 1/10 of the width in the cast slab at the position where dies not influence to the discharged descent flaw of the molten metal from an immersion nozzle in the mold. From just thereafter, rolling reduction is executed to make the range from the corner part in the cast slab to at most 1/10 of the width in the cast slab be the max. 10mm at the one side with one pair of saddle type rolls 10. The rolling reduction is gradulally executed to the center part of the width in the cast slab until the internal temp. at the position of 1/2 thickness of the cast slab becomes the temp. corresponding to 0.1 solid phase ratio, and after the outer surface finally forms to the cast slab having flat rectangular cross sectional surface, the light rolling reduction having 0.5-1.0mm/m is applied at the position, in where the temp. at the position of 1/2 thickness in the cast slab becomes the temp. corresponding to the solid phase ratio of 0.1-0.8.

3. 发明专利

JPH06154979A CONTINUOUS CASTING APPARATUS 失效
公开(公告)号：JPH06154979A
公开(公告)日：1994-06-03
申请号：JP31220492
申请日：1992-11-20
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , SHINOZUKA SATAYUKI , OTA KOZO
IPC分类号： B22D11/04 , B22D11/128
摘要： PURPOSE:To obtain a cast slab having excellent internal quality without segregation by forming a convex crown at least at the center part of one side roll group in supporting roll group near the last solidification position. CONSTITUTION:The convex crouwns are formed at the center parts of at least one side in the supporting roll group 3, 3... to near the last solidification point X, desirably, the upper side of curved cast slab and further desirably, both sides of the supporting roll group 3, 3.... This convex crown rates are made to be larger by larger from just below the mold to near the last solidification point X, such as C1, C2, C3...Cn. By using the supporting roll group 3, 3... having the convex crowns, the projecting rate at the center part in the width direction of the cast slab generated with the mold 2 having the recessed part is gradually reduced by rolling and the uniform rolling reduction force in the width direction of solidified shell can be given.

4. 发明专利

JPH0275457A METHOD FOR PREVENTING AIR FROM INTRUDING INTO DIPPING NOZZLE 失效
公开(公告)号：JPH0275457A
公开(公告)日：1990-03-15
申请号：JP22545088
申请日：1988-09-08
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , KAWASAKI MORIO , NAKAI TAKESHI
IPC分类号： B22D11/10 , B22D11/106 , B22D41/58
摘要： PURPOSE:To prevent air from intruding from a fitting part and a sliding part of a dipping nozzle by blowing inert gas into the dipping nozzle, while measuring pressure of the inside of the dipping nozzle. CONSTITUTION:Pressure in a dipping nozzle 1 is measured continuously by a pressure gauge 8 through a dipping nozzle internal pressure measuring conduit 5 which is attached to the dipping nozzle 1. The measured pressure is converted to an inert gas flow rate instructing signal by a transducer 9, and transmitted to flow rate control valve 10. Inert gas is controlled as to its flow rate by the flow rate control valve 10, passes through a flow meter 11 which is installed in accordance with necessity, and thereafter, blown into the dipping nozzle 1 through a gas blowing use porous refractory 6, and pressure in the dipping nozzle 1 is controlled to prescribed pressure. In such a way, gas in the dipping nozzle 1 is exhausted to the outside of the dipping nozzle from a fitting part and a sliding part, and the inert gas always flows into a void in the dipping nozzle 1, therefore, an intrusion of air can be prevented completely.

5. 发明专利

JPH0254711A METHOD FOR PREVENTING FLOWING-OUT OF SLAG 失效
公开(公告)号：JPH0254711A
公开(公告)日：1990-02-23
申请号：JP20420588
申请日：1988-08-17
申请人： SUMITOMO METAL IND
发明人： HIGUCHI YOSHIHIKO , KASAI NOBUFUMI
IPC分类号： C21C5/46 , C21C7/00
摘要： PURPOSE:To prevent flowing-out caused by enclosing slag on molten steel surface into eddy by applying static magnetic field before developing the eddy in the molten steel at steel tapping hole and rotating magnetic field after developing the eddy to the molten steel pouring stream from a steel tapping vessel. CONSTITUTION:The surface of the molten steel 3 in the ladle 1 is covered with the slag 4 to prevent heat radiation, and this molten steel 3 is poured into a tundish 5 in order from the steel tapping hole 3 at the bottom part in the ladle 1 and further, poured into a mold, to cast a cast slab. At the time of pouring the molten steel 3 into the tundish 5, the static magnetic field is applied to vertical direction to the molten steel pouring stream 6 with a magnet 7 at the steel tapping hole 2 to restrain the development of the eddy at the steel tapping hole 2. At the time of developing the eddy in the molten steel 3 just above the steel tapping hole 2 by lowering the molten steel level in the end period of the steel tapping, while applying the rotating magnetic field to reverse direction to the rotating direction of the eddy to the molten steel pouring stream 6, the molten steel is tapped. By this method, the development of the eddy is surely prevented in the end period of the steel tapping to reduce the flowing-out of the slag 4.

6. 发明专利

JPS63238964A PRODUCTION OF CAST SLAB HAVING LARGE CROSS SECTION 失效
公开(公告)号：JPS63238964A
公开(公告)日：1988-10-05
申请号：JP7110987
申请日：1987-03-25
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , KAWASAKI MORIO
IPC分类号： B22D11/124 , B22D11/128
摘要： PURPOSE:To improve the quality of a cast slab having large cross section and to improve the productivity by perfectly solidifying the cast slab by mist cooling while applying press to the cast slab faces and corner parts in the way of solidification. CONSTITUTION:Water cooled cylinder blocks 11 for compensating solidifying shrinkage of molten steel, are arranged as facing over the whole sections of long side 9 and short side 13 for the cast slab drawn from both end opened mold 2 and also the mist cooling zone 12 is arranged. The cast slab drawn from the mold 2 is supported by the water cooled cylinder blocks 11 and while applying the press and cooling in the mist cooling zone 12, it is perfectly solidified. Then, extreme flowing of the molten steel is prevented by light pressing just below the mold and the solidified shell is uniformly developed and by strong pressing after that, the development of segregation is prevented. Therefore, the cast slab without any surface defect, internal crack and segregation is obtd. and the quality and the productivity for the cast slab having large cross section is improved.

7. 发明专利

JPS63203258A IMMERSION NOZZLE 失效
公开(公告)号：JPS63203258A
公开(公告)日：1988-08-23
申请号：JP3519687
申请日：1987-02-17
申请人： SUMITOMO METAL IND
发明人： NAKAJIMA TAKAHARU , KASAI NOBUFUMI , KAWASAKI MORIO
IPC分类号： B22D11/10 , B22D41/50
摘要： PURPOSE:To prevent clogging of a hole and product defect by disposing a member which contains specific weight % of MgO, C and SiO2 and consists of the balance ZrO2 and impurity to the inside wall surface of a nozzle body essentially consisting of alumina graphite. CONSTITUTION:The member 2 which contains 1-15wt.% MgO,

8. 发明专利

JPS61289945A SLOW COOLING CASTING MOLD FOR VERTICALLY SHORT STEEL INGOT 失效
公开(公告)号：JPS61289945A
公开(公告)日：1986-12-19
申请号：JP12945985
申请日：1985-06-14
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , KAWASAKI MORIO
IPC分类号： B22D7/06 , B22D27/04
摘要： PURPOSE:To cast a vertically short steel ingot which is free from central segregation, porosity and surface crack by evenly providing recesses at a specific area ratio to the base of a casting mold in the stage of casting said ingot by the casting mold which is short in the vertical length. CONSTITUTION:A gate 4 is disposed in the slow cooling casting mold 2 which is of a horizontal moving type and has a low height and large inside area. The molten steel in a tundish 1 is cast from a tundish nozzle 3 into the casging mold. The molten steel is cast in this stage while the casting space S is increased by horizontally moving the mold 2 in an arrow direction and moving the gate 4 toward the right in the mold 2. The molten steel in the mold 2 is solidified in one direction upward from the base. V-shaped vertical and horizontal grooves 5A, 5B are formed to a grid shape to the base 2A of the mold 2 to be used and the recesses 5 by these grooves are evenly formed to the base 2A so as to occupy 50-70% of the bottom area. The unevenness of heat extraction is eliminated by the evenly distributed recesses 5 and the uniform slow cooling is executed. The uniform initial solidified shell is formed in the molten steel cast in the mold and the vertically short steel ingot having no surface cracks and other defects is formed at a good yield.

9. 发明专利

JPS61286043A CASTING METHOD FOR LONGITUDINALLY SHORT STEEL INGOT 失效
公开(公告)号：JPS61286043A
公开(公告)日：1986-12-16
申请号：JP12683685
申请日：1985-06-11
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , KAWASAKI MORIO
IPC分类号： B22D11/06 , B22D7/00 , B22D11/10 , B22D27/04
摘要： PURPOSE:To cast a steel ingot always at the specified thickness and to obtain the good-quality steel ingot which is short in a non-stationary part and has no inclusions by minimizing the initial space of a horizontally moving mold and controlling the moving speed of the casting in such a manner that the molten steel level is kept constant at the same instant when pouring is started. CONSTITUTION:A molten metal level detector 11 is installed above the horizontal moving mold 2 to control a driving motor 6 via a controller 12. A stopper 7 is held open and the motor 6 is controlled simultaneously with the starting of pouring to control the movement of the mold 2 and the casting is thus executed without regulating the flow rate of a tundish nozzle 8. The mold speed is controlled to meet the flow rate of the nozzle changing by various reasons so that the molten steel level is maintained always constant in the stationary state. The moving speed is made small in the initial period of casting and is controlled to the gradully increasing speed. The non-stationary part is thereby made extremely short.

10. 发明专利

JPS61226146A HORIZONTAL AND CONTINUOUS CASTING METHOD FOR STEEL 失效
公开(公告)号：JPS61226146A
公开(公告)日：1986-10-08
申请号：JP6513685
申请日：1985-03-29
申请人： SUMITOMO METAL IND
发明人： KASAI NOBUFUMI , KAWASAKI MORIO
IPC分类号： B22D11/04 , B22D11/06
摘要： PURPOSE:To make possible the production of a unidirectionally solidified ingot having a beautiful surface skin by spraying a powder heat insulating material having a lubricating effect and low m.p. atop a molten steel which is subjected to horizontal and continuous casting and subjecting at the same time, the top surface of the molten steel to heat insulation. CONSTITUTION:The molten steel 5 poured from a pouring pipe 4 into a casting mold consisting of an endless belt 1 and a gate 3 coated with refractories 2 is continuously drawn out in a horizontal direction. The powder 7 is sprayed atop the molten steel 5 from a sprayer 6 and after the powder is removed by a scraper 8, the heat insulating material 10 is further sprayed from a feeder 9 to insulate the heat on the top surface of the molten steel 5. The molten steel is forcibly cooled from the bottom surface so that the unidirectional solidification thereof is accelerated. The unidirectionally solidified ingot having the beautiful surface skin is thus obtd.

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