WO2006094453A1 - Moule pour le moulage continu de billettes - Google Patents

Moule pour le moulage continu de billettes Download PDF

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Publication number
WO2006094453A1
WO2006094453A1 PCT/CN2006/000338 CN2006000338W WO2006094453A1 WO 2006094453 A1 WO2006094453 A1 WO 2006094453A1 CN 2006000338 W CN2006000338 W CN 2006000338W WO 2006094453 A1 WO2006094453 A1 WO 2006094453A1
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WIPO (PCT)
Prior art keywords
triangular
mold
narrow side
narrow
side wall
Prior art date
Application number
PCT/CN2006/000338
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English (en)
French (fr)
Inventor
Fu Ping Tang
Jun Wang
Yong Gang Ma
Hao Dong Huang
Original Assignee
Angang Steel Company Limited
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Publication date
Application filed by Angang Steel Company Limited filed Critical Angang Steel Company Limited
Publication of WO2006094453A1 publication Critical patent/WO2006094453A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/04—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds
    • B22D11/041—Continuous casting of metals, i.e. casting in indefinite lengths into open-ended moulds for vertical casting

Definitions

  • the present invention relates to a metal casting technique, and more particularly to a profiled crystallizer for slab continuous casting. Background technique
  • the straight parallel plate crystallizer is composed of two wide side walls and two narrow side walls of a movable position to form a cavity of the crystallizer, intersecting the wide side wall and the narrow side wall.
  • the four corners of the inner cavity are at right angles. Therefore, in the process of solidification of the molten steel into the shell in the right angle crystallizer, the molten steel in the corner portion is two-dimensionally cooled, and the solidification speed is fast, so that the whole solidification of the cast billet is uneven, and surface defects are likely to occur. Further, the slab cast by the right angle crystallizer is prone to corner cracks because the corner portion has a high cooling rate and the surface temperature is not uniform.
  • An object of the present invention is to provide a profiled crystallizer for slab continuous casting in which four corners of a cavity are rounded or straightly inclined to improve the corner quality of the slab.
  • the shaped crystallizer for slab continuous casting is composed of two wide side walls and two narrow side walls, on both sides of each narrow side wall, that is, The inner side of the connecting end of the wide side wall has a row of right-angled triangular-shaped convex edges, the triangular-shaped convex edge is inclined inward, one right-angled surface is combined with the inner surface of the narrow side wall, and the other right-angled surface and the side surface of the narrow side wall are On the same plane, that is, the extension of the side of the narrow side wall.
  • the inclined surface of the triangular convex edge may have a planar shape, and the straight oblique side of the triangular convex edge has a length of 1 to 15 for the X 1-15 leg.
  • the inclined surface of the triangular convex edge may also have a concave arc shape, and the triangular radius of the triangular convex edge is 1-15.
  • the narrow side walls and the triangular convex edges may be of a unitary structure or may be assembled and integrated.
  • the shaped crystallizer of the invention has the advantages of simple structure, reasonable design, simple operation and more convenient use, and the shape of the corner of the inner cavity of the crystal mold is changed by adopting four rows of right-angled triangular convex edges on two narrow side walls. , the original right angle is changed into a rounded corner or a straight oblique angle, so that the corner cooling during the solidification of the molten steel in the mold to form the shell is adjusted by the two-dimensional cooling to nearly one-dimensional cooling, and the cooling strength of the corner is lowered.
  • the effect is that the solidification of the shell is relatively uniform, thereby avoiding the problem that the corners of the slab are cooled and solidified unevenly and surface defects occur.
  • the mold is easy to process and maintain, and its equipment investment is low, while reducing losses and costs. Since the corners of the casting blank are rounded or beveled, the surface temperature is relatively uniform, and the temperature difference between the middle and the side is reduced, so that the problem of cracking due to the excessively low edge temperature during direct rolling can be avoided, and the shaped crystal of the present invention is used.
  • the utility model can improve the quality of the continuous casting billet of the pipeline steel, reduce the crack defects at the edge of the strip, and improve the labor productivity.
  • Figure 1 is a schematic view showing the structure of a narrow side wall having concave curved triangular shaped edges on both sides of the present invention.
  • FIG. 2 is a schematic structural view of a narrow side wall with flat triangular protrusions on both sides of the present invention.
  • Figure 3 is a schematic view showing the structure of the shaped crystallizer of the present invention.
  • the profiled crystallizer of the present invention is mainly composed of two wide side walls 2 and two narrow side walls 1.
  • the slanted surface of the triangular ridge 3 is inwardly connected, and one right angle surface is combined with the inner side surface of the narrow side wall 1, and the other right angle surface is on the same plane as the side surface of the narrow side wall 1, which is an extension of the side surface of the narrow side wall 1.
  • the narrow side wall 1 and the triangular ledge 3 or 4 of the present invention are preferably of unitary construction, but they may be combined into one body by an assembly method.
  • the purpose of changing the shape of the corner of the cavity of the crystallizer can be achieved without affecting the adjustment of the width of the crystallizer.
  • the invention can be formed by a triangular shape along a bevel shape The change is to change the shape of the corner of the cavity of the mold.
  • the cavity of the crystallizer is rounded; if a triangular convex edge with a slope is formed in a plane shape, (As shown in Figure 2), the cavity of the crystallizer is at a right angle.
  • the size of the triangular convex edge 3 of the present invention should be set as required, and the inclined surface is planar, and the straight oblique side of the triangular convex edge 4 has a length of 1 - 15 legs X 1-15 legs; the inclined surface is concave arc In the shape of the face, the radius of the fillet of the triangular protrusion 3 is 1-15 legs.
  • the invention can achieve the effect of reducing the cooling strength of the corner portion for various steel types such as pipeline steel, automobile and vehicle steel, structural steel, etc.
  • the solidification of the shell is relatively uniform, and the cooling and solidification of the slab corner portion is avoided to the utmost extent.
  • the problem of surface defects is uneven.
  • the straight-angled bevel is a 5-leg X 5 wake-up, or a profiled crystallizer with a radius of 5 mm.
  • a pipe test with a gauge of 135 mm X 1170 mm and grade X52 is carried out, and a conventional right-angle crystallizer is used.
  • Table 1 By comparison, it is not difficult to see that the temperature difference between the corners and the middle portion of the cast slab cast by the shaped crystallizer of the present invention is remarkably reduced, and the ratio of occurrence of cracks at the edges of the strip is also significantly reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Continuous Casting (AREA)

Description

一种板坯连铸用的异形结晶器 技术领域
本发明涉及一种金属铸造技术， 尤其涉及一种板坯连铸用的异形结晶器。 背景技术
在现有板坯连铸技术中， 直平行板结晶器是由两块宽侧壁和两块可移动位 置的窄侧壁一起构成结晶器内腔的， 在宽侧壁和窄侧壁的相交处， 也即内腔的 四个角呈直角状。 因此， 钢水在这种直角结晶器内凝固形成坯壳的过程中角部 的钢液呈二维冷却， 凝固速度较快， 使得铸坯整体凝固不均匀， 很容易出现表 面缺陷。 而且， 这种直角结晶器铸出的板坯， 由于边角部冷却速度快， 表面温 度不均匀， 还容易产生角部裂纹。 特别在管线钢 （X42、 X46、 X52、 X60、 X70 等）， 汽车及车辆用钢（A510L、 HQ600、 SMY490等）及结构用钢（Q345A、 Q345B 等） 牌号钢的生产过程中， 不经扒皮处理直接轧制的板带往往因此产生边部裂 紋而成为废品。
发明内容
本发明的目的在于提供一种其内腔的四个角呈圆角或直斜角状的板坯连 铸用的异形结晶器， 以提高铸坯角部质量。
为了实现上述目的本发明是这样实现的： 该板坯连铸用的异形结晶器由两 块宽侧壁和两块窄侧壁组合而成， 在每块窄侧壁的两侧边， 也即与宽侧壁连接 端的内侧各有一排直角三角状凸沿， 该三角状凸沿的斜面向内， 一个直角面与 窄侧壁的内表面相结合， 另一个直角面与窄侧壁的侧面在同一平面上， 也即窄 侧壁侧面的延伸。 ，
所述的三角状凸沿的斜面可以呈平面形， 该三角状凸沿的直斜角边长度为 1一 15讓 X 1—15腿。
所述的三角状凸沿的斜面也可以呈内凹弧面形， 该三角状凸沿的圆角半径 为 1一15讓。 所述的窄侧壁和三角状凸沿可以是整体结构的， 也可以是装配组合成一体 的。
本发明的异形结晶器结构简单， 设计合理， 操作简单， 更大限度地方便使 用， 由于采用了两块窄侧壁上的四排直角三角状凸沿， 改变了结晶器内腔角部 的形状， 将原来的直角改变成了圆角或直斜角， 使钢水在结晶器内凝固形成 坯壳过程中的角部冷却由二维冷却调整为接近一维冷却，达到了降低角部 冷却强度的效果， 使坯壳凝固相对均匀， 从而避免了板坯角部冷却凝固不 均匀而出现表面缺陷的问题。 结晶器加工维护简单， 其设备投资低， 同时 也降低了损耗和成本。 由于铸坯边角呈圆角或斜角形， 其表面温度相对均 匀， 中间和边部的温差减小， 可避免直接轧制时因边部温度过低而产生裂 纹的问题， 采用本发明异形结晶器可提高管线钢连铸坯的质量， 减少板 带边部裂紋缺陷， 提高了劳动生产率。
附图说明
附图 1 为本发明两侧边带有内凹弧面形三角状凸沿的窄侧壁的结构示意 图。
附图 2为本发明两侧边带有平面形三角状凸沿的窄侧壁的结构示意图。 ' 附图 3为本发明异形结晶器的结构示意图。
具体实施方式
从附图 3中可以看到本发明异形结晶器主要由两块宽侧壁 2和两块窄侧壁 1组合而成。 在每块窄侧壁 1的内侧两边， 也即与宽侧壁 2连接端的内侧各有 一排直角三角状凸沿 3。该三角状凸沿 3的斜面向内，其一个直角面与窄侧壁 1 的内侧表面相结合， 另一个直角面与窄侧壁 1的侧面在同一平面上， 为窄侧壁 1侧面的延伸，并与宽侧壁 2的内表面相连接。本发明窄侧壁 1和三角状凸沿 3 或 4最好为整体结构， 但也可通过组装的方法使两者结合成一体。 采用这种窄 侧壁 1和三角状凸沿 3或 4相结合的方法， 既能达到改变结晶器内腔角部形状 的目的， 同时又不影响结晶器宽度的调整。 本发明可通过三角状凸沿斜面形状 的变化来改变结晶器内腔角部的形状。 如釆用其斜面呈内凹弧面形的三角状凸 沿 3 (如附图 1和 3所示）， 则结晶器内腔呈圆角； 如采用其斜面呈平面形的三 角状凸沿 4 (如附图 2所示）， 则结晶器内腔呈直斜角。 本发明三角状凸沿 3或 的尺寸应按要求设定， 斜面呈平面形的， 该三角状凸沿 4的直斜角边长度为 1 - 15腿 X 1-15腿；斜面呈内凹弧面形的，该三角状凸沿 3的圆角半径为 1- 15腿。
由于本发明对管线钢、 汽车及车辆用钢、 结构用钢等多种钢种都可达到降 低角部冷却强度的效果， 使坯壳凝固相对均匀， 最大程度的避免了板坯角 部冷却凝固不均匀而出现表面缺陷的问题。 下面以直斜角边为 5腿 X 5醒， 或圆角半径为 5mm的异形结晶器为例， 对规格为 135mm X 1170mm、 牌号为 X52 的管线钢进行了浇注试验， 并与传统直角结晶器做了比较， 对比结 果见表 1。 通过对比不难看出采用本发明异形结晶器浇注出的铸坯边角 部与中部的温差明显减小， 板带边部出现裂紋的比率也明显降低。
表 1 传统直角结晶器与异形结晶器浇注试验使用效果对比
Figure imgf000005_0001

Claims

权 利 要 求
1、种板坯连铸用的异形结晶器， 由两块宽侧壁 (2)和两块窄侧壁 (1)组合而 成， 其特征在于在每块窄侧壁 (1)的两侧边， 也即与宽侧壁 (2)连接端的内侧各 有一排直角三角状凸沿 (3或 4)， 该三角状凸沿 (3或 4)的斜面向内， 一个直角 面与窄侧壁 (1)的内表面相结合， 另一个直角面与窄侧壁（1)的侧面在同一平面 上， 也即窄侧壁 (1)侧面的延伸。
2、 根据权利要求 1所述的异形结晶器， 其特征在于所述三角状凸沿 (4)的 斜面呈平面形， 该三角状凸沿的直斜角边长度为 l-15mmX l- 15腿。
3、 根据权利要求 1所述的异形结晶器， 其特征在于所述三角状凸沿 (3)的 斜面呈内凹弧面形， 该三角状凸沿的圆角半径为 1 醒 一 15mm。
4、根据权利要求 1、 2或 3所述的异形结晶器，其特征在于所述窄侧壁 (1) 和三角状凸沿 (3或 4)为整体结构或装配组合成一体。
PCT/CN2006/000338 2005-03-07 2006-03-07 Moule pour le moulage continu de billettes WO2006094453A1 (fr)

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CNU2005200895944U CN2776595Y (zh) 2005-03-07 2005-03-07 一种板坯连铸用的异形结晶器
CN200520089594.4 2005-03-07

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011039083A1 (de) * 2009-09-29 2011-04-07 Siemens Vai Metals Technologies Gmbh Stranggiesskokille
CN103084550A (zh) * 2011-10-28 2013-05-08 宝山钢铁股份有限公司 一种改善连铸结晶器角部传热的方法及连铸结晶器

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102527959A (zh) * 2011-12-22 2012-07-04 莱芜钢铁集团有限公司 组合式结晶器
CN103317109B (zh) * 2012-03-19 2016-02-24 宝山钢铁股份有限公司 一种弱化连铸结晶器角部传热的方法

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US4702299A (en) * 1984-11-05 1987-10-27 Kabel-Und Metallwerke Gutehoffnungshuette Ag Mold for continuous casting and method of making
US5191924A (en) * 1989-07-19 1993-03-09 Sollac Built-up ingot mold for the continuous casting of metal
US5467809A (en) * 1990-10-02 1995-11-21 Mannesmann Aktiengesellschaft Liquid-cooled ingot mold for the continuous casting of steel billets in the form of slabs
CN1266388A (zh) * 1997-08-04 2000-09-13 乔维尼·阿维迪 改进的用于连续浇铸钢板坯的接触式结晶器
CN1502432A (zh) * 2002-11-27 2004-06-09 张祝得 一种连铸机结晶器的拉坯工艺及其专用结晶器结构

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702299A (en) * 1984-11-05 1987-10-27 Kabel-Und Metallwerke Gutehoffnungshuette Ag Mold for continuous casting and method of making
US5191924A (en) * 1989-07-19 1993-03-09 Sollac Built-up ingot mold for the continuous casting of metal
US5467809A (en) * 1990-10-02 1995-11-21 Mannesmann Aktiengesellschaft Liquid-cooled ingot mold for the continuous casting of steel billets in the form of slabs
CN1266388A (zh) * 1997-08-04 2000-09-13 乔维尼·阿维迪 改进的用于连续浇铸钢板坯的接触式结晶器
CN1502432A (zh) * 2002-11-27 2004-06-09 张祝得 一种连铸机结晶器的拉坯工艺及其专用结晶器结构

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011039083A1 (de) * 2009-09-29 2011-04-07 Siemens Vai Metals Technologies Gmbh Stranggiesskokille
CN103084550A (zh) * 2011-10-28 2013-05-08 宝山钢铁股份有限公司 一种改善连铸结晶器角部传热的方法及连铸结晶器

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