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    CASTING STEEL STRIP WITH LOW SURFACE ROUGHNESS AND LOW POROSITY
    2.
    发明申请
    CASTING STEEL STRIP WITH LOW SURFACE ROUGHNESS AND LOW POROSITY 审中-公开
    铸造具有低表面粗糙度和低孔隙度的钢带

    公开(公告)号：WO2004065039A1

    公开(公告)日：2004-08-05

    申请号：PCT/AU2004/000086

    申请日：2004-01-23

    Applicant: NUCOR CORPORATION ,  MAHAPATRA, Rama, Ballav ,  BLEJDE, Walter

    Inventor： MAHAPATRA, Rama, Ballav ,  BLEJDE, Walter

    IPC: B22D11/06

    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.

    Abstract translation: 一种通过铸造具有至少约70ppm的总氧含量和20至60ppm的游离氧含量的钢水铸造而生产具有低表面粗糙度和低孔隙率的铸钢带的方法，以及允许大多数任何 氧化物夹杂物处于液相线状态。 总氧含量可以至少为100ppm，游离氧含量为30-50ppm。 通过该方法生产的钢带可以具有每单位面积密度为每平方毫米至少120个氧化物夹杂物，距带材表面约2微米的深度。

    CASTING STEEL STRIP
    3.
    发明申请
    CASTING STEEL STRIP 审中-公开
    铸钢条

    公开(公告)号：WO2003024644A1

    公开(公告)日：2003-03-27

    申请号：PCT/AU2002/001257

    申请日：2002-09-13

    Applicant: NUCOR CORPORATION ,  BLEJDE, Walter ,  MAHAPATRA, Rama, Ballav ,  STREZOV, Lazar

    Inventor： BLEJDE, Walter ,  MAHAPATRA, Rama, Ballav ,  STREZOV, Lazar

    IPC: B22D11/06

    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, SiO 2 and Al 2 O 3 distributed throughout the steel at an inclusion density in the range 2gm/cm 3 to 4gm/cm 3 . 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/mm 2 .

    Abstract translation: 双辊铸造薄钢带。 在一对冷却的铸辊之间引入熔融钢，以形成铸造池，钢从该铸造池固化在辊上以产生固化的钢带。 钢水的总氧含量在100ppm至250ppm范围内，并且包含金属氧化物夹杂物，其包含MnO，SiO 2和Al 2 O 3中的一种或多种，​​分布在整个钢中，夹杂物密度为2gm / cm 3至4gm / 厘米<3>。 通常，夹杂物的尺寸范围在2和12微米之间。 铸钢带的厚度小于5mm，并且包含固化的金属氧化物夹杂物，其分布成使得钢带的区域含有至少120个夹杂物/ mm 2的每单位面积密度的固化夹杂物。

    METHOD AND APPARATUS FOR CONTROLLING VARIABLE SHELL THICKNESS IN CAST STRIP
    4.
    发明申请
    METHOD AND APPARATUS FOR CONTROLLING VARIABLE SHELL THICKNESS IN CAST STRIP 审中-公开
    用于控制箱体中可变壳厚度的方法和装置

    公开(公告)号：WO2011050417A1

    公开(公告)日：2011-05-05

    申请号：PCT/AU2010/001447

    申请日：2010-10-29

    Applicant: BLUESCOPE STEEL LIMITED ,  IHI CORPORATION ,  NUCOR CORPORATION ,  MAHAPATRA, Rama Ballav ,  McGAUGHEY, David Wayne ,  ONDROVIC, Jay Jon ,  PATTERSON, Tim ,  SCHUEREN, Mike

    Inventor： MAHAPATRA, Rama Ballav ,  McGAUGHEY, David Wayne ,  ONDROVIC, Jay Jon ,  PATTERSON, Tim ,  SCHUEREN, Mike

    IPC: B22D11/06

    CPC classification number: B22D11/0665 ,  B22C9/06 ,  B22D11/06 ,  B22D11/0622 ,  B22D11/0651

    Abstract: Apparatus and method for continuously casting metal strip includes a pair of casting rolls having casting surfaces with a center portion, edge portions each having average surface roughness between (3) and (7) Ra, and intermediate portion between each edge portion and the center portion, the center portion average surface roughness between 1.2 and 4.0 times the edge portion surface roughness, and the intermediate portions average surface roughness between that of the edge and center portions. The surface roughness of the center portion is tapered across its width, and may be tapered across its width is in stepped zones. The center portion may have surface roughness varied across the surface to correspond to a desired variation in metal shell thickness across the cast strip. The center portion may be at least 60% of the casting roll width, and each edge portion may be up to 7% of the casting roll width.

    Abstract translation: 用于连续铸造金属带的设备和方法包括一对铸造辊，其具有中心部分的铸造表面，每个平均表面粗糙度在（3）和（7）Ra之间的边缘部分，以及每个边缘部分和中心部分之间的中间部分 ，中心部分平均表面粗糙度在边缘部分表面粗糙度的1.2和4.0倍之间，中间部分的平均表面粗糙度在边缘和中心部分之间的平均表面粗糙度。 中心部分的表面粗糙度在其宽度上是锥形的，并且其宽度上的锥形可以是阶梯状的。 中心部分可以具有在表面上变化的表面粗糙度，以对应于跨过铸造带材的金属壳厚度的期望变化。 中心部分可以是铸辊宽度的至少60％，并且每个边缘部分可以高达铸辊宽度的7％。

    THIN CAST STRIP WITH CONTROLLED MANGANESE AND LOW OXYGEN LEVELS AND METHOD FOR MAKING SAME
    5.
    发明申请
    THIN CAST STRIP WITH CONTROLLED MANGANESE AND LOW OXYGEN LEVELS AND METHOD FOR MAKING SAME 审中-公开
    具有控制的锰和低氧含量的薄铸造带及其制造方法

    公开(公告)号：WO2008025096A1

    公开(公告)日：2008-03-06

    申请号：PCT/AU2007/001279

    申请日：2007-08-31

    Applicant: NUCOR CORPORATION ,  BLUESCOPE STEEL LIMITED ,  IHI CORPORATION ,  MAHAPATRA, Rama, Ballav ,  SOSINSKY, David, J.

    Inventor： MAHAPATRA, Rama, Ballav ,  SOSINSKY, David, J.

    IPC: C22C38/18 ,  C22C38/06 ,  B22D11/06 ,  C22C38/38

    CPC classification number: B22D11/0622 ,  B22D11/1206 ,  B22D27/20 ,  C22C1/02 ,  C22C33/04 ,  C22C38/002 ,  C22C38/02 ,  C22C38/04 ,  C22C38/06 ,  C22C38/18

    Abstract: A method for making a thin cast strip with reduced meniscus marks includes assembling a pair of casting rolls laterally positioned to form a nip therebetween, preparing molten steel having a carbon content in the range of 0.01 to 0.3 % by weight, a manganese content between 0.1 and 0.8 % by weight, a silicon content between 0.05 and 0.5 % by weight, a calcium content between 0.0008 and 0.004 % by weight, an aluminum content between 2 and 500 ppm by weight, having a free oxygen content below about 50 ppm at 1600 °C, forming a casting pool of the molten steel supported on casting surfaces of the casting rolls above the nip, and counter-rotating the casting rolls cause thin strip to be casted downwardly from the nip.

    Abstract translation: 用于制造具有减少弯月面标记的薄铸造带的方法包括组装一对横向定位以在其间形成辊隙的铸辊，制备碳含量在0.01至0.3重量％范围内的钢水，锰含量为0.1 和0.8重量％，硅含量在0.05至0.5重量％之间，钙含量在0.0008至0.004重量％之间，铝含量在2至500重量ppm之间，1600℃时游离氧含量低于约50ppm ℃，形成支撑在辊隙上方的铸辊的铸造表面上的钢水铸造池，并且反向旋转铸辊使得薄带从辊隙向下铸造。

    NON-CONTACT HEAT ABSORBERS FOR STRIP CASTING
    7.
    发明申请
    NON-CONTACT HEAT ABSORBERS FOR STRIP CASTING 审中-公开
    非接触式热吸收器用于条纹铸造

    公开(公告)号：WO1997034718A1

    公开(公告)日：1997-09-25

    申请号：PCT/AU1997000133

    申请日：1997-03-06

    Applicant: ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES COMPANY LIMITED ,  BHP STEEL (JLA) PTY. LTD. ,  BLEJDE, Walter ,  FUKASE, Hisahiko ,  MAHAPATRA, Rama, Ballav

    Inventor： ISHIKAWAJIMA-HARIMA HEAVY INDUSTRIES COMPANY LIMITED ,  BHP STEEL (JLA) PTY. LTD.

    IPC: B22D11/22

    CPC classification number: B22D11/0697 ,  B22D11/0622 ,  B22D11/124

    Abstract: A method and apparatus for casting ferrous metal strip. A casting pool (30) of ferrous molten metal is supported on a pair of chilled generally horizontal casting rolls (22) forming a nip (27) between them. The casting rolls (22) rotate mutually opposite directions to produce a solidified metal strip (12) moving downwardly from the nip (27). The strip (12) passes along a transit path (10) which takes it away from the nip (27) in an unrestrained loop (29) disposed within a strip enclosure (38) within which the strip is confined through said transit path (10). The strip (12) moves downwardly from the nip (27) to form the unrestrained loop (29) passes between a pair of cooled non-contact heat absorbers (101) to which heat is radiated from the strip (12) whereby to extract from the strip heat generated by completion of solidification of metal therein after leaving the casting pool (30). Heat absorbers (101) are formed as opposite side walls of a cooling collar (100) defining an upper part of enclosure (38) and provided with cooling water ducts (102).

    Abstract translation: 一种用于铸造黑色金属带的方法和装置。 铁水熔融金属的铸池（30）支撑在一对冷却的大致水平的铸辊（22）上，在其间形成辊隙（27）。 铸造辊（22）沿相反的方向旋转以产生从辊隙（27）向下移动的凝固金属条（12）。 条带（12）沿着传送路径（10）通过，该传送路径将其从设置在条带外壳（38）内的无限制环（29）中的间隙（27）移开，条带封闭件（38）内的条被限制穿过所述传送路径 ）。 条带（12）从压区（27）向下移动，形成无限制回路（29）在一对冷却的非接触式吸热器（101）之间通过，从而从带材（12）辐射热量，从而从 在离开浇注池（30）之后通过其中金属的固化完成产生的带材热。 吸热器（101）形成为限定外壳（38）的上部并且设置有冷却水管道（102）的冷却套环（100）的相对侧壁。

    METHOD AND APPARATUS FOR CONTROLLING STRIP TEMPERATURE REBOUND IN CAST STRIP
    8.
    发明申请
    METHOD AND APPARATUS FOR CONTROLLING STRIP TEMPERATURE REBOUND IN CAST STRIP 审中-公开
    用于控制条纹条带温度的方法和装置

    公开(公告)号：WO2011035374A1

    公开(公告)日：2011-03-31

    申请号：PCT/AU2010/001241

    申请日：2010-09-22

    Applicant: BLUESCOPE STEEL LIMITED ,  IHI CORPORATION ,  NUCOR CORPORATION ,  BLEJDE, Walter ,  MAHAPATRA, Rama, Ballav ,  SCHLICHTING, Mark

    Inventor： BLEJDE, Walter ,  MAHAPATRA, Rama, Ballav ,  SCHLICHTING, Mark

    IPC: B22D11/06 ,  B22D11/16 ,  B22D46/00

    CPC classification number: B22D11/0622 ,  B22D11/16

    Abstract: A method of continuously casting metal strip comprises delivering molten metal supported on the casting surfaces of the casting rolls and counter rotating the casting rolls to form metal shells on the casting surfaces brought together at the nip to deliver cast strip downwardly with a controlled amount of mushy material between the metal shells. The method also comprises determining at a reference location downstream from the nip a target temperature for the cast strip corresponding to a desired amount of mushy material between the metal shells of the cast strip and sensing the temperature of the cast strip cast downstream from the nip at the reference location and producing a sensor signal corresponding to the sensed temperature. The method also comprises causing an actuator to vary the gap at the nip between the casting rolls in response to the sensor signal received and processed to determine the temperature difference between the sensed temperature and the target temperature.

    Abstract translation: 连续铸造金属条的方法包括输送支撑在铸辊的铸造表面上的熔融金属，并相反地旋转铸辊，以在夹持在一起的铸造表面上形成金属壳，以将控制量的糊状物向下输送铸钢带 金属壳之间的材料。 该方法还包括在轧制的下游的参考位置确定对应于铸造带材的金属壳之间的期望量的糊状材料的铸造钢板的目标温度，并感测铸态下游辊隙处的铸造带材的温度 参考位置并产生对应于感测温度的传感器信号。 该方法还包括致动器响应于接收和处理的传感器信号来改变铸辊之间辊隙处的间隙，以确定所感测的温度和目标温度之间的温度差。

    THIN CAST STEEL STRIP WITH REDUCED MICROCRACKING
    9.
    发明申请
    THIN CAST STEEL STRIP WITH REDUCED MICROCRACKING 审中-公开
    具有减少微裂纹的薄铸钢条

    公开(公告)号：WO2009021280A1

    公开(公告)日：2009-02-19

    申请号：PCT/AU2008/001164

    申请日：2008-08-12

    Applicant: BLUESCOPE STEEL LIMITED ,  IHI CORPORATION ,  NUCOR CORPORATION ,  OTSUKA, Hiroyuki ,  YAMANE, Koshiro ,  TERASAKI, Satoshi ,  SCHLICHTING, Mark ,  MAHAPATRA, Rama Ballav

    Inventor： OTSUKA, Hiroyuki ,  YAMANE, Koshiro ,  TERASAKI, Satoshi ,  SCHLICHTING, Mark ,  MAHAPATRA, Rama Ballav

    IPC: B22D11/00 ,  B22D11/06

    CPC classification number: B22D11/0622 ,  C22C38/00 ,  Y10T428/12

    Abstract: A thin cast steel strip and method of making thereof with improved resistance to microcracking is disclosed. The steel strip is produced by continuous casting and contains a carbon content between about 0.010% and about 0.065% by weight, less than 5.0% by weight chromium, at least 70 ppm of total oxygen and between 20 and 70 ppm of free oxygen, and manganese to sulfur ratio greater than about 250:1. The carbon content in the cast strip may be below 0.035%, less than 0.005% by weight titanium, and the average manganese to silicon ratio in the strip produced may be greater than 3.5:1. The carbon content may be less than 0.035%, the casting speed less than 76.68 meters per minute, and the tundish temperature of the molten metal is maintained below 1612°C (2933.7°F).

    Abstract translation: 公开了一种薄铸钢带及其制造方法，具有改进的抗微裂纹性能。 钢带通过连续铸造生产，并且含有碳含量为约0.010％至约0.065重量％，小于5.0重量％的铬，至少70ppm的总氧和20至70ppm的游离氧，以及 锰与硫的比例大于约250：1。 铸造带材中的碳含量可以低于0.035％，小于0.005重量％的钛，并且所生产的带材中的平均锰/硅比可以大于3.5:1。 碳含量可以小于0.035％，铸造速度小于76.68米/分钟，熔融金属的中间包温度保持在1612℃以下（2933.7°F）。

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