• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Narrow-side copper plate for a mold for controlling the recess of a chamfered slab chamfer, having a working surface on which the narrow-side copper plate is in contact with molten steel, and having a central region (1) and two oblique side regions (2, 3) with concave arcs ( 4, 5, 6, 7); the work surface is a funnel-shaped arcuate surface whose upper edge is longer than the lower edge, straight lines (8, 9) being respectively provided in the central region (1) at the upper opening and at the lower opening of the narrow-side copper plate; and the arcs (4, 5) or the straight line (8) at the upper opening of the narrow-side copper plate are 0.3 to 2.5% longer than the arcs (6, 7) or the straight line (9 ) at the lower opening.
    公开号:AT15198U1
    申请号:TGM243/2015U
    申请日:2015-08-17
    公开日:2017-02-15
    发明作者:
    申请人:Central Iron And Steel Res Inst；Zhong Da Nat Eng And Res Center Of Continuous Casting Tech Co Ltd；
    IPC主号:
    专利说明:

    Description [0001] The invention relates generally to continuous casting of steel, and more particularly to a narrow side copper plate for a casting mold for controlling the recess of a chamfered slab chamfer.
    Surface defects are key technical issues in the manufacture of microalloyed steel plates and strips. A still occurring cast slab defect is due to cross cracks at corners. In particular, when typical peritectic or hypoperitecture microalloyed steel containing 0.08-0.20% carbon is produced in sheet forms, defects generally occur due to transverse cracks at the corners of the cast slab.
    In order to solve the problem of cross cracks on the sides and corners of microalloyed steel, the methods currently used mainly include improving the quality of molten steel, optimizing and stabilizing the performance of casting powder and optimizing the cooling process of a secondary cooling section , It is also known to apply a beveled die technique, this technique aiming to change the original right angle of a cast slab into two obtuse angles in order to eliminate the stress concentration at the corners of the cast slab and to increase the corner temperature.
    A problem with the use of the tapered die technique is that all transitions of the cast slabs in the chamfered area are not smooth, and that the circumferential uniformity of heat load, bending stress and straightening load applied to the narrow side chamfered area of the cast slab , in the continuous casting process is low. In addition, the corner of the cast slab at the upper part of the secondary cooling section is inevitably widened so that the chamfer of the cast slab is lowered, and the corner near the wide side tends to be changed from an obtuse angle to a right angle, so that the technical Effect of the beveled mold is reduced.
    According to CN102274934A and the corresponding DE 20 2012 004 204 U1, the working surface at which a narrow-side copper plate comes into contact with the molten steel, a central region and on both sides of two bevelled areas, wherein the working surface is a concave surface that narrows from top to bottom. In this case, no structure is disclosed in which the central region would be flat and the two beveled surfaces are bent.
    In CN201871696U an arcuate configuration is defined, but it is stated that the lower portion of the narrow-side copper plate is a flat surface. However, this eliminates the elimination of a recess of a cast slab chamfer.
    It is therefore an object of the invention to provide a narrow-side copper plate for a mold, which allows a beveled slab to have an externally raised shape to effectively control the depression of the slanted slab and the surface quality of a subsequently produced, to improve hot-rolled steel plate.
    To solve this problem, the invention provides a narrow-side copper plate as defined in claim 1 before. Advantageous embodiments and further developments are specified in the dependent claims.
    The thickness of a cast slab suitable for casting the narrow-side copper plate is 130 mm - 480 mm, and the narrow-side copper plate is suitable for a straightening die or an arcuate casting mold.
    [0010] The work surface or work plate is provided with a molten steel side and a copper plate side opposed to each other, and the contour lines of the two tapered portions are concave downward on both sides of the upper opening and the lower opening toward the copper plate side.
    Compared with the prior art, the present narrow-side copper plate has the following advantages: The narrow-side copper plate can accommodate the shrinkage of most steel grades upon solidification, and the structural configuration allows the beveled slab to project outside Having shape, which is advantageous for controlling the recess of the chamfered slab chamfer and for improving the surface quality of a hot-rolled steel plate.
    The invention will be further explained with reference to preferred embodiments illustrated in the drawings. In the drawings: Fig. 1 is a schematic view of a narrow side copper plate for a mold for controlling the depression of a chamfered slab; Figure 2 is a schematic profile view of a narrow-side copper plate, with Veran vividly a transition curve of the copper plate from top to bottom. Fig. 2a is a schematic profile view according to which the narrow-side copper plate extends in a straight line from top to bottom; Fig. 2b is a schematic profile view according to which the narrow-side copper plate extends in a curved line from top to bottom; Figure 2c is a schematic profile view according to which the narrow-side copper plate extends in a line composed of straight lines from top to bottom. and Fig. 3 is a schematic cross-sectional view (or plan view) of the upper opening of a working surface of the narrow-side copper plate.
    Fig. 1 shows an example of a schematic view of a narrow-side copper plate for a mold for controlling the recess of a beveled slab chamfer. The working surface with which this narrow-side copper plate comes into contact with molten steel, has a central region 1 and two bevelled regions 2, 3 on the two sides of the central region 1. The two sides, front and back of the worktop, are a molten steel side and a copper plate side, respectively, the working surface of the narrow side copper plate 1 being a funnel-shaped curved surface which is larger at the top and smaller at the bottom; Beveled portions 2, 3 on the two sides of the copper plate are defined at the upper opening by arcs 4, 5 which are concave toward the copper plate side (inwardly), and the tapered portions 2, 3 on the two sides are at the lower opening of the narrow-side copper plate defined by respective arcs 6, 7, which are also concave in the direction of the copper plate side; straight lines 8, 9 respectively delimit the center region 1 at the upper opening and at the lower opening of the copper plate 1. The arcs 4, 5 or the straight line 8 at the upper opening of the narrow-side copper plate are / are respectively 0.3 - 2.5% longer than the sheets 6, 7 or the straight line 9 at the lower opening.
    Fig. 2 shows a schematic profile view of a transition curve of the narrow-side copper plate from top to bottom, where cd is an angle of the arc 4 at the upper opening of the tapered portion 2 on one side of the working surface and a side surface 15 (see Also Fig. 3) of the narrow-side copper plate is included, a2 is an angle which is enclosed by the sheet 5 at the upper opening of the tapered portion 3 of the other side of the working surface and the other side surface 16 of the narrow-side copper plate, and wherein the of the sheets 4, 5 at the upper opening of the tapered portions 2, 3 of the working surface and the sides 15, 16 of the narrow-side copper plate included angles a1 and a2 be 44 ° - 74 °; β1 is the angle enclosed by the arc 6 at the lower opening of the tapered portion 2 of the one side 15 of the working surface and the side surface of the narrow-side copper plate, and β2 is the angle from the other arc 7 at the lower opening the chamfered portion 3, on the other side 16 of the working surface, and the other side 16 of the narrow-side copper plate is enclosed; the angles β1 and β2 enclosed by the arches 6, 7 at the lower opening of the tapered portions 2, 3 of the working surface and the sides 15, 16 of the narrow sides of the copper plate are 45 ° -75 °, with a1 <β1 and a2 <ß2 is.
    2a, 2b and 2c show in schematic profiles three different embodiments of the narrow-side copper plate, with a straight, smooth line (Fig. 2a), a smooth, arcuate line (Fig. 2b) and a square , compound line (Figure 2c), corresponding to transitions.
    In the central region 1 and in the tapered portions 2, 3 of the narrow-side copper plate, the transition from the sheets 4, 5 or the straight line 8 at the upper opening of the narrow-side copper plate to the sheets 6, 7 or the straight line 9 at the lower opening are each a straight, smooth transition 12, as shown in Fig. 2a, an arcuate, smooth transition 13, as shown in Fig. 2b, or a square transition 14, as shown in FIG. 2c, or a transition according to any other longitudinal profile 10 or 11. In this case, a funnel-shaped curved surface which becomes narrower from top to bottom is formed, wherein in the height direction, while the cross section changes from top to bottom, that of The angles of the beveled surfaces 2, 3 of the working surface of the narrow-side copper plate and the sides 15, 16 of the narrow-side copper plate are gradually increased, the lengths of the arcs gradually increase h, and the length of the straight line of the middle region 1 of the working surface of the narrow-side copper plate also gradually becomes smaller.
    Fig. 3 schematically shows the cross section of the upper opening of the work surface of the narrow-side copper plate, wherein the lengths L1, L2 of the sheets 4, 5 at the upper opening of the tapered portions of the working surface of the narrow-side copper plate 30 mm - 120 mm ; and wherein in the longitudinal direction the thickness difference H between the sides 15, 16 of the narrow-side copper plate and the central region 1 of the working surface of the narrow-side copper plate is 15 mm -100 mm.
    The thickness of a cast slab suitable for casting the narrow-side copper plate is 130 mm-480 mm, and the narrow-side copper plate is suitable for a straightening die as well as an arcuate casting mold.
    权利要求:
    Claims (6)
    [1]
    claims
    A narrow-side copper plate for a mold for controlling the recess of a chamfered slab chamfer having a working surface at which the narrow-side copper plate comes into contact with molten steel and having a central portion (1) and chamfered portions (2, 3) on both sides thereof characterized in that the working surface is a funnel-shaped arcuate surface which is larger at the upper edge and smaller at the lower edge, the contour lines of the two beveled regions (2,3) on two sides of the upper opening being respective arches (4, 5) which are concave downward toward the copper plate side, and the contour lines of the two tapered portions (2, 3) on two sides of the lower opening are respective arcs (6, 7) which are concave toward the copper plate side, and straight Lines (8, 9) are respectively provided in the central area (1) at the upper opening and at the lower opening of the narrow-side copper plate; and the arcs (4, 5) or the straight line (8) corresponding to the area of the upper opening of the narrow-side copper plate are each 0.3-2.5% longer than the arcs (6, 7) or even Line (9) corresponding to the area of the lower opening.
    [2]
    2. narrow-side copper plate according to claim 1, characterized in that the of the sheets (4, 5) at the upper opening of the two bevelled areas (2, 3) of the working surface of the narrow-side copper plate and the corresponding sides (15, 16) the narrow-side copper plate included angle (α1, a2) each 44 ° - 74 ° amount; and the angles (β1, β2) enclosed by the sheets (6, 7) at the lower opening of the two tapered portions (2, 3) of the working surface of the narrow-side copper plate and the corresponding sides (15, 16) of the narrow-side copper plate, respectively 45 ° - 75 °, where a1 <ß1 and a2 <ß2.
    [3]
    3. narrow-side copper plate according to claim 1 or 2, characterized in that the transition from the sheets (4, 5) or the straight line (8) in the region of the upper opening of the narrow-side copper plate to the sheets (6, 7) or the straight line (9) in the region of the lower opening is a straight smooth transition (12) or an arcuate smooth transition (13) or a sectionally non-smooth transition (14) or has any longitudinal profile (10, 11).
    [4]
    4. narrow-side copper plate according to one of claims 1 to 3, characterized in that the lengths (L1, L2) of the sheets (4, 5) at the upper opening of the tapered portions of the working surface of the narrow-side copper plate 30 mm - 120 mm ; wherein in the longitudinal direction, the thickness difference H between the sides (15, 16) of the narrow-side copper plate and the central region (1) of the working surface of the narrow-side copper plate is 15 mm -100 mm.
    [5]
    The narrow-side copper plate according to any one of claims 1 to 4, characterized in that the thickness of a casting slab suitable for casting the narrow-side copper plate is 130 mm - 480 mm, and wherein the narrow-side copper plate is for a straightening die or an arcuate casting mold suitable is.
    [6]
    6. narrow-side copper plate according to one of claims 1 to 5, characterized in that the working surface with a molten steel side and a copper plate side, which are opposite to each other, is provided, and the contour lines of the two bevelled areas (2, 3) on the two sides of upper opening and the lower opening are concave toward the copper plate side down.
    类似技术:
    公开号 | 公开日 | 专利标题
    AT15198U1|2017-02-15|Narrow-sided copper plate for a mold for controlling the recess of a beveled slab chamfer
    DE2743025C3|1980-07-24|Method for expanding the strand width of a steel strand in continuous casting
    DE4131829C2|1993-10-21|Liquid-cooled mold for the continuous casting of steel strands in slab format
    DE202012004204U1|2012-06-15|Bevelled narrow-side copper plate for casting mold with funnel-shaped curved surface
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    DE60204294T2|2006-02-02|METHOD FOR REPAIRING A RISK-RESISTANT SLIDING PLATE AND REPAIRED SLIDING PLATE
    DE2926719A1|1980-01-17|METHOD FOR REPAIRING A PLATE CHOCOLATE FOR STEEL CONTINUOUS
    DE112012002560T5|2014-03-06|Liquid steel caster
    DE2758514B2|1981-04-16|Continuous jet casting mold for billet and bloom strands
    WO2011039083A1|2011-04-07|Continuous casting die
    DE2743026B2|1979-11-08|Method for reducing the width of a steel strand in continuous casting
    DE1939777C3|1980-11-13|Arrangement and formation of transition pieces in a continuous casting mold
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    DE673211C|1939-03-17|Die for re-forging thick-web rail profiles in such greater heights
    DE102012003155B4|2016-03-17|Method for changing the width of a metal sheet
    DE1508837C3|1975-10-02|Device for pressing the strand material in sheet metal casting
    DE2549011A1|1976-05-06|PLATE COLLAR FOR CONTINUOUS METAL, IN PARTICULAR STEEL
    DE550627C|1932-05-12|Process for the production of copper sheets and bars by rolling out wedge-shaped bars
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    DE102017211108A1|2019-01-03|Mold plate and mold for a continuous casting plant and continuous casting process
    同族专利:
    公开号 | 公开日
    ITUB20153083A1|2017-02-12|
    CN204035495U|2014-12-24|
    DE202015005350U1|2015-08-12|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN201871696U|2010-10-27|2011-06-22|钢铁研究总院|Narrow face copper plate of crystallizer with curved structure|
    CN102274934B|2011-08-15|2013-04-24|钢铁研究总院|Narrow copper plate with funnel-shaped curved surface and chamfered crystallizer|CN105983666A|2015-02-28|2016-10-05|宝山钢铁股份有限公司|Slab crystallizer narrow-side cooper plate with curved surface profile consistent in shrinking|
    CN105983665A|2015-02-28|2016-10-05|宝山钢铁股份有限公司|Narrow-edge copper plate for slab mold with continuous variable taper at corner|
    CN104874754B|2015-06-19|2017-05-31|东北大学|Convex curved surface crystallizer and its method for designing in a kind of slab leptoprosopy|
    CN112743052A|2020-12-29|2021-05-04|马鞍山钢铁股份有限公司|Slab crystallizer for solving casting blank narrow surface cracks and control method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    CN201420466011.4U|CN204035495U|2014-08-18|2014-08-18|A kind of narrow face copper plate of crystallizer controlling chamfering base inclined-plane depression|
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