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公开(公告)号：JP2010000544A
公开(公告)日：2010-01-07
申请号：JP2009231150
申请日：2009-10-05
Applicant: Nucor Corp , ニューコア・コーポレーション
Inventor： BLEJDE WALTER , MAHAPATRA RAMA BALLAV
CPC classification number: B22D11/16 , B22D11/0622
Abstract: PROBLEM TO BE SOLVED: To produce a strip having the customer-specified characteristic by using single roll profiles for casting rolls of a substantially constant throughput, producing the extensively different cast strip thickness, maintaining a predetermined as-cast fine structure in a cast strip, and performing the decoration-control as expected firmly by the subsequent cooling system.
SOLUTION: In a twin roll strip caster, by determining a target depth of the casting pool and a target speed of the casting rolls to operate at them, the thickness of the as-cast strip is controlled. The as-cast strip may be cast to the customer-specified thickness or may be subsequently rolled to a customer-specified thickness.
COPYRIGHT: (C)2010,JPO&INPITAbstract translation: 要解决的问题：为了通过使用具有基本恒定生产量的铸辊的单辊轮廓来生产具有顾客指定特性的条带，产生广泛不同的铸造带材厚度，将预定的铸态精细结构保持在 铸钢带，并按照预期的顺序进行后续冷却系统的装饰控制。 解决方案：在双辊式连铸机中，通过确定铸造池的目标深度和铸造辊的目标速度在其上运行，控制铸钢带的厚度。 铸钢带可以铸造成客户指定的厚度，或者可以随后轧制成客户指定的厚度。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：JP2014100741A
公开(公告)日：2014-06-05
申请号：JP2013249012
申请日：2013-12-02
Applicant: Nucor Corp , ニューコア・コーポレーション
Inventor： BLEJDE WALTER , ONDROVIC JAY JON
CPC classification number: B21B1/46 , B21B1/463 , B21B27/10 , B21B2027/103 , B21B2261/14
Abstract: PROBLEM TO BE SOLVED: To provide a low surface roughness casting strip manufacturing method capable of reducing micro cracks on a surface of a casting strip, by controlling a hot rolled strip in surface roughness less than 1.5 micron.SOLUTION: An oil-water mixture is applied to a backup roll of a hot rolling machine, and while applying the oil-water mixture to a work roll from the backup roll; a thin casting strip is passed through the hot rolling machine at a temperature less than 1100°C; the thin casting strip passing through the hot rolling machine from a casting roll is wrapped up with an atmosphere containing less than 5% of oxygen; the thin casting strip is formed having at least one microstructure selected from the group consisting of polygonal ferrite, needle-like ferrite, Widmanstaetten, bainite and martensite, and having the surface roughness of less than 1.5 micron Ra and the scale thickness of less than about 10 micron, which is set to be formed at the manufacturing speed of more than 80 m/min.
Abstract translation: 要解决的问题：通过控制表面粗糙度小于1.5微米的热轧带钢，提供能够减少铸造带材表面的微裂纹的低表面粗糙度铸造带材制造方法。解决方案：油水混合物 施加到热轧机的支撑辊上，同时将油水混合物从支承辊施加到工作辊上; 在低于1100℃的温度下将薄的铸造带材通过热轧机; 通过热轧机从铸辊上的薄铸造带被包含少于5％氧气的气氛包裹起来; 所述薄铸造带形成为具有选自多边形铁素体，针状铁素体，Widmanstaetten，贝氏体和马氏体中的至少一种微结构，并且具有小于1.5微米Ra的表面粗糙度和小于约 10微米，其设定为以大于80m / min的制造速度形成。
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3.发明申请MODEL-BASED SYSTEM FOR DETERMINING CASTING ROLL OPERATING TEMPERATURE IN A THIN STRIP CASTING PROCESS 审中-公开基于模型的系统，用于确定薄壁铸造工艺中的铸造辊筒操作温度
公开(公告)号：WO03055623A9
公开(公告)日：2003-11-20
申请号：PCT/AU0201736
申请日：2002-12-20
Applicant: NUCOR CORP , BLEJDE WALTER , MAHAPATRA RAMA BALLAV
Inventor： BLEJDE WALTER , MAHAPATRA RAMA BALLAV
IPC: B22D11/16 , B22D2/00 , B22D11/055 , B22D11/06 , B22D11/128 , B22D11/20 , B22D11/22
CPC classification number: B22D11/0682 , B22D11/20
Abstract: A model-based strategy is provided for determining casting roll operating temperature in a continuous thin strip casting process. A first temperature sensor produces a first temperature signal indicative of the temperature of cooling liquid supplied to the casting rolls and a second temperature sensor produces a second temperature signal indicative of the temperature of cooling liquid temperature exiting the casting rolls. A computer determines a heat flux value as a function of the first and second temperature signals, and computes the operating temperature of the casting rolls as a function of the heat flux value, the second temperature signal and a number of constants defined by fixed-valued operating parameters of the continuous thin strip casting process. A control strategy is also provided to modify one or more operating parameters of the continuous thin strip casting process as a function of the casting roll temperature.
Abstract translation: 提供了一种基于模型的策略，用于在连续薄带铸造工艺中确定铸辊工作温度。 第一温度传感器产生指示供应到铸辊的冷却液体的温度的第一温度信号，第二温度传感器产生指示离开铸辊的冷却液体温度的温度信号。 计算机确定作为第一和第二温度信号的函数的热通量值，并且根据热通量值，第二温度信号和由固定值定义的常数的数量来计算铸辊的工作温度 连续薄带铸造工艺的工作参数。 还提供控制策略来修改作为铸辊温度的函数的连续薄带铸造工艺的一个或多个操作参数。
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4.发明公开MODEL-BASED SYSTEM FOR DETERMINING PROCESS PARAMETERS FOR THE LADLE REFINEMENT OF STEEL 审中-公开MODEL-BASED SYSTEM FOR工艺参数FOR PAN钢的治疗中测定
公开(公告)号：EP1474537A4
公开(公告)日：2007-01-10
申请号：EP03701359
申请日：2003-02-14
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , SOMMER JOEL
IPC: B22D11/06 , B22D1/00 , B22D46/00 , C21C5/30 , C21C7/00 , C21C7/06 , C21C7/064 , C21C7/072 , C21C7/076 , F27D19/00 , F27D21/00 , G01D21/00 , G01D21/02
CPC classification number: F27D19/00 , B22D1/00 , B22D46/00 , C21C7/0075 , C21C7/06 , C21C7/064 , C21C7/072 , F27D21/00 , F27D21/0014 , F27D2019/0003
Abstract: A system for determining process parameters for the ladle refinement of steel includes a computer executing a number of software algorithms for determining one or more process parameters for various steel refinement process steps. In one embodiment, for example, the computer is configured to determine the total amount of flux additions to achieve a desired sulfur percentage as part of a steel desulfurization process. In another embodiment, the computer is configured to determine the total quantity of oxygen to be injected into the steel as part of a steel reoxidation process. In still another embodiment, the computer is configured to determine a melting temperature of inclusions within the refined steel, and to determine whether this melting temperature is within an acceptable range to successfully process the steel in a continuous steel strip casting apparatus/process, or whether the steel must be reworked to achieve an acceptable inclusion melting temperature.
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公开(公告)号：EP1587642A4
公开(公告)日：2009-01-07
申请号：EP04704516
申请日：2004-01-23
Applicant: NUCOR CORP
Inventor： MAHAPATRA RAMA BALLAV , BLEJDE WALTER
CPC classification number: B22D11/0674 , B22D11/0622 , B22D11/0651 , Y10T428/12
Abstract: A method of producing cast steel strip having low surface roughness and low porosity by casting with molten steel having a total oxygen content of at least about 70 ppm and a free oxygen content between 20 and 60 ppm, and a temperature that allows a majority of any oxide inclusions to be in a liquidus state. The total oxygen content may be at least 100 ppm and the free oxygen content between 30 and 50 ppm. The steel strip produced by the method may have a per unit area density of at least 120 oxide inclusions per square millimeter to a depth of about 2 microns from the strip surface.
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Patent Agency Ranking
公开(公告)号：EP1439926A4
公开(公告)日：2004-11-03
申请号：EP02766948
申请日：2002-09-13
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , MAHAPATRA RAMA BALLAV , STREZOV LAZAR
CPC classification number: B22D11/0622 , C22C38/02 , C22C38/04
Abstract: Twin roll casting of thin steel strip. Molten steel is introduced between a pair of cooled casting rolls to form a casting pool from which steel solidifies on the rolls to produce a solidified strip. The molten steel has a total oxygen content in the range 100ppm to 250ppm and contains metal oxide inclusions comprising any one or more of MnO, SiO2 and Al2O3 distributed throughout the steel at an inclusion density in the range 2gm/cm3 to 4gm/cm3. Typically the inclusions range in size between 2 and 12 microns. The cast strip has a thickness of less than 5mm and contains solidified metal oxide inclusions distributed such that the regions of the strip contain solidified inclusions to a per unit area density of at least 120 inclusions/mm2.
Abstract translation: 一种生产带材的方法，包括以下步骤：将一对铸辊与它们之间的辊隙组装，在铸辊之间引入以形成总氧含量为至少100ppm且通常小于250的熔融碳钢铸造池 ppm，对铸辊进行反转，使辊上的钢水固化，形成金属壳，氧化物夹杂物水平由钢水的总氧含量反映出来，并通过铸辊之间的辊隙从固化后形成薄钢带 炮弹。 可以使用具有延展性的方法获得独特的钢带。
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公开(公告)号：EP1337362A4
公开(公告)日：2004-11-03
申请号：EP01971503
申请日：2001-09-28
Applicant: NUCOR CORP
Inventor： STREZOV LAZAR , MUKUNTHAN KANNAPPAR , BLEJDE WALTER , MAHAPATRA RAMA
IPC: B21B1/46 , B22D11/00 , B22D11/06 , B22D11/12 , B22D11/124 , B22D11/22 , C21D1/18 , C21D8/02 , C21D9/573 , C22C38/00 , C22C38/06 , C22C38/60 , C21D1/00
CPC classification number: B22D11/225 , B22D11/0622 , C21D1/18 , C21D8/0215 , C21D8/0226 , C21D9/573
Abstract: Steel strips and methods for producing steel strips are provided. In an illustrated embodiment, a method for producing steel strips includes continuously casting molten steel into a strip, said molten steel comprising a concentration of residuals of 2.0 wt% or less is selected with regard to the microstructure of the finished strip to provide a desired yield strength; and cooling the strip to transform the strip from austenite to ferrite in the temperature range of 850 DEG C to 400 DEG C. Cast steel with improved yield strength properties is produced by such method.
Abstract translation: 提供钢条和钢带的生产方法。 在图示的实施例中，钢带的制造方法包括将钢水连续铸造成钢带，对于成品钢带的微结构而言，选择残留量为2.0重量％以下的钢水，以提供所需的产率 强度; 并在850℃至400℃的温度范围内冷却该条带以将该条带从奥氏体转变为铁素体。通过这种方法产生具有改善的屈服强度特性的铸钢。
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公开(公告)号：EP1326724A4
公开(公告)日：2004-06-23
申请号：EP01971505
申请日：2001-09-28
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , MAHAPATRA RAMA , STREZOV LAZAR , MUKUNTHAN KANNAPPAR
CPC classification number: B22D11/0622 , B22D11/16
Abstract: A method of controlling a continuous steel strip casting process based on customer-specified requirements includes a general purpose computer in which product specifications of steel product ordered by a customer is entered. The computer is configured to automatically map the product specifications to process parameters/set points for controlling the continuous steel strip casting process in a manner to produce the customer ordered product, and in one embodiment produces a process change report detailing such process parameters/set points for operator use in physically implementing such process parameters/set points in the strip casting process. Alternatively, the computer may provide the process parameters/set points directly to the strip casting process for automatic control thereof in producing the customer ordered steel product. The process of the present invention is capable of substantially reducing the time between a customer request for a steel product and delivery thereof over that of conventional steel manufacturing processes.
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9.发明公开LOW SURFACE ROUGHNESS CAST STRIP AND METHOD AND APPARATUS FOR MAKING THE SAME 有权CAST波段低表面粗糙度和方法及装置其生产
公开(公告)号：EP1989009A4
公开(公告)日：2012-10-17
申请号：EP07701554
申请日：2007-02-27
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , ONDROVIC JAY JON
CPC classification number: B21B1/46 , B21B1/463 , B21B27/10 , B21B2027/103 , B21B2261/14
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公开(公告)号：EP1509350A4
公开(公告)日：2005-08-10
申请号：EP03722096
申请日：2003-05-30
Applicant: NUCOR CORP
Inventor： BLEJDE WALTER , MAHAPATRA RAMA BALLAV
CPC classification number: B22D11/16 , B22D11/0622
Abstract: A method of controlling in a twin roll strip caster the thickness of as-cast strip by determining and operating at a target depth of the casting pool and a target speed of the casting rolls. The as-cast strip may be cast to a customer-specified thickness or may be subsequently rolled to a customer-specified thickness.
Abstract translation: 通过在铸池的目标深度和铸辊的目标速度下确定和操作来控制双辊轧机中铸态带材的厚度的方法。 铸造钢带可以铸造成客户指定的厚度，或者可以随后轧制成客户指定的厚度。
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