WO2024066742A1 - 一种改善热轧薄带钢的局部高点的方法 - Google Patents
一种改善热轧薄带钢的局部高点的方法 Download PDFInfo
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- WO2024066742A1 WO2024066742A1 PCT/CN2023/111281 CN2023111281W WO2024066742A1 WO 2024066742 A1 WO2024066742 A1 WO 2024066742A1 CN 2023111281 W CN2023111281 W CN 2023111281W WO 2024066742 A1 WO2024066742 A1 WO 2024066742A1
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- Prior art keywords
- hot
- local high
- high points
- casting
- rolled thin
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 88
- 239000010959 steel Substances 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 77
- 230000000116 mitigating effect Effects 0.000 title abstract 2
- 238000005266 casting Methods 0.000 claims abstract description 79
- 238000009749 continuous casting Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 14
- 230000004323 axial length Effects 0.000 claims description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 4
- 239000010962 carbon steel Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 5
- 230000007547 defect Effects 0.000 abstract 1
- 238000012797 qualification Methods 0.000 abstract 1
- 239000013049 sediment Substances 0.000 abstract 1
- 238000005098 hot rolling Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 4
- 230000006872 improvement Effects 0.000 description 4
- 238000005096 rolling process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 101100233916 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) KAR5 gene Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000013072 incoming material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000195 production control method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
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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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
-
- 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
- B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
- B22D11/0637—Accessories therefor
- B22D11/0665—Accessories therefor for treating the casting surfaces, e.g. calibrating, cleaning, dressing, preheating
-
- 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
- B22D11/16—Controlling or regulating processes or operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B2001/225—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length by hot-rolling
Definitions
- the invention belongs to the technical field of steel production, and relates to a plate shape control technology for ultra-thin hot-rolled strip steel, and more specifically to a method for improving local high points of hot-rolled thin strip steel.
- the twin-roller thin strip continuous casting process is to let the liquid molten steel enter the molten pool formed by a pair of oppositely rotating casting rollers through the water distribution nozzle.
- the molten steel contacts the surface of the casting rollers with a lower temperature to form a solid billet shell.
- the billet is guided out of the casting roller surface to form a continuous casting strip.
- the casting strip is rolled into ultra-thin hot-rolled strip steel through a hot rolling pass. Since the reduction of one hot rolling pass is small, the improvement effect on the strip shape is weak.
- the shape quality of the casting strip largely determines the shape quality of the rolled strip and the surface quality of the final steel coil.
- the molten steel is cooled by the casting rolls and solidified in a short time.
- the oxide deposits adhere to the surface of the casting rolls.
- the deposits must be removed by roller brushes.
- the uniformity of the deposits on the surface of the casting rolls affects the uniformity of heat conduction in the width direction of the casting strip, thereby affecting the thickness in the width direction of the casting strip, that is, generating local high points of the casting strip and hot-rolled thin strip steel. None of the existing technologies involve the control of local high points of the casting strip during the thin strip continuous casting process.
- Chinese patents CN101879525B solve the local high points of strip steel during hot rolling by grinding the finishing mill online
- CN102310089B and CN106140829B eliminate local wear of the working rolls by designing CVC mills to make the finishing mill wear evenly
- CN101927264B eliminates local wear of the finishing mill rolls by lateral movement of the finishing mill, but the above methods all control local high points by eliminating local wear of the rolls.
- Chinese patent application CN113664047A provides a method for eliminating local high points of wide and thick steel plates, but this method does not involve a solution for eliminating local high points of hot-rolled thin strip steel.
- the existing technologies are limited to uniformly wearing the hot rolling mill to solve the local high points of the hot rolled strip, and none of them involve the technical solution of controlling the plate shape of the hot rolled incoming material. It is also limited to the traditional hot rolling process, and does not involve the control of the plate profile of the twin-roll thin strip continuous casting strip.
- the present invention innovatively provides a method for controlling the plate shape profile and local high points of the cast strip during the twin-roll casting process, thereby achieving control of the plate shape profile and local high points of the hot-rolled thin strip steel and the surface quality of the final thin strip steel coil.
- the purpose of the present invention is to provide a production control method for improving the local high points of hot-rolled thin strip steel.
- the method of the present invention achieves the purpose of uniform deposits on the casting roll surface by controlling the size, shape, rotation speed and torque of the roller brush, improves the uniformity of heat conduction on the casting roll surface along the axial direction, and controls the casting and rolling force during the twin-roll casting process, eliminates the local high points of the cast strip plate shape during the twin-roll continuous casting process, and improves the smoothness of the cast strip plate shape profile, thereby improving the plate shape profile of the hot-rolled thin strip steel, eliminating the local high points of the hot-rolled thin strip steel, and improving the surface quality of the hot-rolled thin strip steel coil.
- a method for improving local high points of hot rolled thin strip steel comprising:
- a roller brush is arranged on the back of each casting roller in the same direction of rotation as the casting roller to remove surface deposits of the casting roller during the casting process, wherein the roller brush is composed of a roller shaft and bristles, and the bristles are distributed along the axial direction and circumferential direction of the roller shaft.
- the method further comprises:
- the total casting force applied to both ends of the casting roll is controlled within the range of 1000 to 20000N.
- the method further comprises: controlling the rotation speed of the roller brush within the range of 200 to 450 rpm.
- the method further comprises: controlling the torque of the roller brush within the range of 300 to 450 lbi ⁇ ft.
- the method further comprises: controlling the total casting force applied to both ends of the casting roll to be in the range of 8000-16000N.
- the method further comprises: controlling the dynamic balance value of the roller brush to be below 100 g.
- the method further comprises: controlling the difference between the axial length of the roller brush surface with bristles wrapped thereon and the axial length of the casting roller to be less than 300 mm.
- the method further comprises: controlling the diameter of the roller shaft of the roller brush after the bristles are wrapped to be in the range of 245 to 255 mm.
- the method further comprises: controlling the diameter deviation of the roller brush wrapped with bristles in the axial direction to be less than 0.18 mm.
- the bristles of the roller brush are made of stainless steel or carbon steel, and the method further comprises: controlling the nanohardness value of the bristles to be in the range of 4 to 10 GPa.
- the bristles of the roller brush are made of stainless steel or carbon steel, and the method further comprises:
- the diameter of the steel wire of the bristles is in the range of 0.145 to 0.155 mm.
- the method further comprises: controlling the linear density of the bristles to be in the range of 50 to 180 pieces/100 mm.
- a hot-rolled thin steel strip is provided, wherein the above-mentioned method is used to control the local high points of the thin steel strip during the production process of the hot-rolled thin steel strip.
- the present invention fully studies the causes of the formation of steel coil ribs and local high points in the shape of hot-rolled thin strip during the production process of twin-roll continuous casting thin strip steel, and proposes for the first time to control the local high points of the shape of the twin-roll continuous casting strip and the incoming hot rolling material, while the existing technology has never involved controlling the shape of the strip during the molten steel casting process.
- the present invention proposes that the shape of the cast strip is controlled by controlling the uniformity of the deposits on the surface of the casting rolls.
- the uniformity of the distribution of the deposits on the surface of the casting rolls By controlling the uniformity of the distribution of the deposits on the surface of the casting rolls, the uniformity of heat conduction in the axial direction of the casting rolls is improved, and the thermal profile of the casting roll surface is made consistent with the designed casting roll profile, thereby achieving the purpose of smoothing the shape of the cast strip.
- the present invention improves the effect of the roller brush on the casting roll by controlling the size and surface quality of the roller brush.
- the surface deposits are removed to achieve uniformity of the surface deposits on the casting rollers.
- the speed and torque of the roller brushes and the casting and rolling force are controlled to achieve the purpose of controlling the continuous casting plate shape, eliminate the local high points of the cast strip and hot-rolled thin strip, and improve the surface quality of the thin strip steel coil.
- FIG. 1 is a schematic diagram of a local high point plate shape profile curve of a thin strip steel in the prior art.
- FIG. 2 shows the bulges on the surface of the steel coil caused by local high points of the hot-rolled thin strip steel in the prior art.
- FIG3 is a schematic diagram of a thin strip steel plate profile curve after improvement by the method of the present invention.
- FIG. 4 shows the surface of a hot rolled thin strip steel coil improved by the method of the present invention.
- the molten steel is cooled by the casting rolls and solidified in a short time.
- the oxide deposits adhere to the surface of the casting rolls.
- the uniformity of the deposits on the surface of the casting rolls affects the uniformity of heat conduction in the width direction of the casting strip, thereby affecting the thickness in the width direction of the casting strip, that is, generating local high points of the casting strip and hot-rolled thin strip steel.
- Figures 1 and 2 respectively show the plate shape contour curve of the local high point of thin strip steel in the prior art, and the bulge on the surface of the steel coil caused by the local high point of the hot-rolled thin strip steel in the prior art.
- the qualified molten steel is led out through a pair of casting rollers rotating in opposite directions to form a cast strip.
- a roller brush is closely attached to the back of each casting roller in the same direction of rotation as the casting roller.
- the length of the casting roller is 1450mm
- the axial length of the part of the roller brush with bristles is 1500mm
- the diameter of the roller brush is 252mm
- the diameter deviation of the roller brush along the axial direction is 0.17mm.
- the nanohardness of the bristles is 8GPa
- the diameter is 0.147mm
- the bristle density is 160 pieces/100mm.
- the dynamic balance of the roller brush is 67g.
- the speed of the roller brush is controlled to be 220rpm and the torque is 340lbi ⁇ ft.
- the total casting force applied to the casting roller during the twin-roll continuous casting process is 8500N.
- the cast strip led out from the casting roller is rolled into a 0.9mm hot-rolled thin strip steel through a hot rolling.
- Figure 3 shows the profile curve of the thin strip steel plate after the method of the present invention is improved
- Figure 4 shows the surface of the hot-rolled thin strip steel coil after the method of the present invention is improved. It can be seen that the strip steel plate has a smooth contour without local high points. After being coiled by the coiler, the surface of the steel coil is smooth without ribs.
- the qualified molten steel is led out through a pair of casting rollers rotating in opposite directions to form a cast strip.
- a roller brush is attached to the back of each casting roller in the same direction of rotation as the casting roller.
- the length of the casting roller is 1367mm
- the axial length of the part of the roller brush with bristles is 1460mm
- the diameter of the roller brush is 248mm
- the diameter deviation of the roller brush along the axial direction is 0.02mm.
- the nano hardness of the brush is 7GPa
- the diameter is 0.151mm
- the density of the brush is 121 pieces/100mm.
- the dynamic balance of the roller brush is 46g.
- the speed of the roller brush is controlled to be 430rpm and the torque is 420lbi ⁇ ft.
- the total casting force applied to the casting roller during the twin-roll continuous casting process is 10800N.
- the cast strip led out from the casting roller is rolled into a 1.2mm hot-rolled thin strip steel after a hot rolling.
- the strip steel plate profile is smooth and there is no local high point. It is coiled into a coil by a coiler.
- the surface of the steel coil is smooth and there is no rib.
- the qualified molten steel is discharged through a pair of casting rollers rotating in opposite directions to form a cast strip.
- a roller brush is attached to the back of each casting roller in the same direction of rotation as the casting roller.
- the length of the casting roller is 1590mm
- the axial length of the part of the roller brush with bristles is 1780mm
- the diameter of the roller brush is 241mm
- the diameter deviation of the roller brush along the axial direction is 0.11mm.
- the nanohardness of the bristles is 5GPa
- the diameter is 0.154mm
- the bristle density 85 pieces/100mm.
- the dynamic balance of the roller brush is 21g.
- the speed of the roller brush is controlled to be 348rpm and the torque is 395lbi ⁇ ft.
- the total casting force applied to the casting roller during the twin-roll continuous casting process is 15600N.
- the cast strip discharged from the casting roller is rolled into a 1.45mm hot-rolled thin strip steel through a single hot rolling process.
- the strip steel plate profile is smooth. There are no local high points.
- the coil is coiled by the coiler, and the surface of the steel coil is smooth without ribs.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
一种改善热轧薄带钢板形局部高点的方法。通过对薄带连铸关键部件进行控制，进而控制双辊连铸铸带板形，从而达到控制一道次热轧后的薄带钢的局部高点的目的，改善了薄带钢板形轮廓和钢卷表面质量。通过对浇铸过程中辊刷表面平整度，辊刷刷毛密度和硬度，辊刷动平衡值以及转速和扭矩的控制，控制双辊连铸铸辊表面沉积物均匀性，同时控制双辊连铸过程中铸力，达到消除连铸铸带局部高点，提高铸带板形轮廓的平滑性的效果，从而实现消除热轧薄带钢板形轮廓局部高点以及钢卷表面起筋缺陷。可以提升薄带钢板形质量和卷形质量，进而可以提高产品的合格率。
Description
本发明属于钢铁生产技术领域，涉及超薄热轧带钢板形控制技术，更具体涉及一种改善热轧薄带钢的局部高点的方法。
双辊薄带连铸工艺是将液态钢水经过布流水口进入一对相向旋转的铸辊形成的熔池中，钢水与温度较低的铸辊表面接触，形成固态坯壳，随着铸辊旋转导出铸辊表面，形成连续铸带，铸带经过一道次热轧轧制成超薄热轧带钢。由于1道次热轧压下量较小，对铸带板形的改善效果较弱，铸带的板形质量绝大部分的决定了轧带的板形质量以及最终钢卷的表面质量。
双辊连铸过程中，钢水经过铸辊冷却，在短时间内凝固，在凝固过程中，氧化沉积物黏附于铸辊表面，随着氧化物逐渐沉积至铸辊表面，钢水与铸辊之间的传热受到阻碍，必须通过辊刷将沉积物去除，沉积物在铸辊表面的均匀性，影响铸带宽度方向的热传导均匀性，从而影响铸带宽度方向的厚度，即产生铸带和热轧薄带钢的局部高点。现有的技术均未涉及薄带连铸过程中铸带局部高点的控制。
现有的对带钢局部高点的研究局限于对局部高点的检测以及常规精轧和冷轧过程中的轧制控制。中国专利CN105203731B、CN107999548B、CN112179308A提供了对带钢板形局部高点的检测和识别方法，但上述专利未涉及对带钢局部高点的控制方法。中国专利CN101879525B通过对精轧机在线研磨、CN102310089B和CN106140829B通过设计CVC轧机消除工作辊局部磨损使精轧机均匀磨损、CN101927264B通过精轧机横向移动消除精轧机轧辊局部磨损来解决热连轧过程中的带钢局部高点，但以上方法均是通过消除轧辊的局部磨损来控制局部高点的。中国专利申请CN113664047A提供了一种宽厚规格钢板消除局部高点的方法，但该方法未涉及消除热轧薄带钢局部高点的解决方法。
可见，现有技术均局限于对热轧机进行均匀磨损来解决热轧带钢的局部高点，均未涉及对热轧来料进行板形控制的技术方案。另外，现有技术
也局限于传统的热连轧过程，更未涉及对双辊薄带连铸铸带的板形轮廓控制。
发明内容
基于现有技术存在的上述问题，本发明创新性提供一种对双辊铸轧过程中铸带板形轮廓及局部高点的控制方法，从而实现对热轧薄带钢板形轮廓和局部高点以及最终薄带钢钢卷的表面质量的控制。
更具体而言，本发明的目的是提供一种改善热轧薄带钢的局部高点的生产控制方法。本发明的方法通过对辊刷尺寸形状、转速和扭矩的控制达到铸辊表面沉积物均匀的目的，提高铸辊表面沿轴向的热传导均匀性，同时控制在双辊浇铸过程中的铸轧力，消除双辊连铸过程中铸带板形的局部高点，提高铸带板形轮廓的平滑性，从而改善热轧薄带钢的板形轮廓、消除热轧薄带钢的局部高点，提高热轧薄带钢的钢卷表面质量。
本发明的目的是通过下述技术方案来实现的：
根据本发明的第一方面，提出了一种改善热轧薄带钢的局部高点的方法，所述方法包括：
在双辊连铸过程中，在每支铸辊的背部设置与所述铸辊旋转方向相同的辊刷，以去除铸辊在浇铸过程中的表面沉积物，其中所述辊刷由辊轴和刷毛组成，刷毛沿辊轴的轴向方向及圆周方向分布，
所述方法进一步包括：
将辊刷的转速控制在50～550rpm的范围；
将辊刷的扭矩控制在100～600lbi·ft的范围(其中扭矩单位N·m与lbi·ft的换算关系大致为：1N·m＝0.7376lbi·ft)；
将施加在铸辊两端的铸轧力总和控制在1000～20000N的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将辊刷的转速控制在200～450rpm的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将辊刷的扭矩控制在300～450lbi·ft的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将施加在铸辊两端的铸轧力总和控制在8000～16000N的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将辊刷的动平衡值控制在100g以下。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将辊刷表面缠有刷毛的轴向长度与铸辊的轴长之间的差值控制为小于300mm的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将辊刷的辊轴缠好刷毛后的直径控制在245～255mm的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将缠有刷毛的辊刷沿轴向的直径偏差控制在小于0.18mm的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，辊刷的刷毛材质为不锈钢或碳钢，所述方法进一步包括：将刷毛的纳米硬度值控制在4～10Gpa的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，辊刷的刷毛材质为不锈钢或碳钢，所述方法进一步包括：
将刷毛的钢丝直径在0.145～0.155mm的范围。
根据本发明的改善热轧薄带钢的局部高点的方法，优选地，所述方法进一步包括：将刷毛的线密度控制在50～180根/100mm的范围。
根据本发明的第二方面，提出了一种热轧薄带钢，所述热轧薄带钢在生产过程中采用前述方法对薄带钢的局部高点进行控制。
有益技术效果
与现有技术相比，本发明的技术优势及有益技术效果简要总结如下：
本发明充分研究双辊连铸薄带钢生产过程中钢卷起筋以及热轧薄带板形局部高点的形成原因，首次提出对双辊连铸铸带及一道次热轧来料的板形进行局部高点控制，而现有的技术从未涉及在钢水浇铸过程中对板形进行控制。本发明提出铸带板形的控制是通过对铸辊表面沉积物的均匀性进行控制的，通过控制沉积物在铸辊表面分布的均匀性，提高铸辊轴向的热传导均匀性，实现铸辊表面的热轮廓与设计的铸辊轮廓一致，达到铸带板形平滑的目的。本发明通过控制辊刷的尺寸和表面质量，提高辊刷对铸辊
表面沉积物的去除，实现铸辊表面沉积物的均匀性，同时对辊刷的转速和扭矩的控制、铸轧力的控制，达到控制连铸板形的目的，消除了铸带、热轧薄带的局部高点，提高了薄带钢钢卷的表面质量。
为了更清楚地介绍本发明的实施例的技术方案，下面将对实施例的附图作简单的介绍。显而易见，下面描述中的附图仅仅涉及本发明的一些实施案例，而非对本发明的限制。
图1是现有技术的薄带钢的局部高点板形轮廓曲线的示意图。
图2示出了现有技术的热轧薄带钢的局部高点导致的钢卷表面凸起。
图3是本发明的方法改善后的薄带钢板形轮廓曲线示意图。
图4示出了本发明的方法改善后的热轧薄带钢钢卷表面。
为了使本发明实施例的目的、技术方案和优点更加清楚，下面将对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其他实施例，都属于本发明保护的范围。
除非另作定义，本发明所使用的技术术语或科学术语应当为本发明所属领域具有一般技能的人士所理解的通常意义。
双辊连铸过程中，钢水经过铸辊冷却，在短时间内凝固，在凝固过程中，氧化沉积物黏附于铸辊表面，随着氧化物逐渐沉积至铸辊表面，钢水与铸辊之间的传热受到阻碍，必须通过辊刷将沉积物去除，沉积物在铸辊表面的均匀性，影响铸带宽度方向的热传导均匀性，从而影响铸带宽度方向的厚度，即产生铸带和热轧薄带钢的局部高点。图1和图2分别示出了现有技术的薄带钢的局部高点板形轮廓曲线，以及现有技术的热轧薄带钢的局部高点导致的钢卷表面凸起。
实施例1
冶炼合格的钢水经过一对相向旋转的铸辊导出形成铸带，每支铸辊背部紧贴有一支与该铸辊旋转方向相同的辊刷。铸辊长度为1450mm，辊刷缠有刷毛部分的轴长为1500mm，辊刷的直径为252mm，沿轴向辊刷直径偏差为0.17mm。刷毛的纳米硬度为8GPa，直径为0.147mm，刷毛密度为160根/100mm。辊刷的动平衡为67g。控制辊刷的转速为220rpm，扭矩为340lbi·ft。在双辊连铸过程中施加在铸辊上的总铸轧力为8500N。自铸辊导出的铸带经过一道次热轧轧制成0.9mm的热轧薄带钢。可以参见图3，示出了本发明的方法改善后的薄带钢板形轮廓曲线，图4则示出了本发明的方法改善后的热轧薄带钢钢卷表面。可以看到，带钢板形轮廓平滑，无局部高点，经卷取机卷取成卷，钢卷表面平滑，无起筋。
实施例2
冶炼合格的钢水经过一对相向旋转的铸辊导出形成铸带，每支铸辊背部紧贴有一支与该铸辊旋转方向相同的辊刷。铸辊长度为1367mm，辊刷缠有刷毛部分的轴长为1460mm，辊刷的直径为248mm，沿轴向辊刷直径偏差为0.02mm。刷毛的纳米硬度为7GPa，直径为0.151mm，刷毛密度为121根/100mm。辊刷的动平衡为46g。控制辊刷的转速为430rpm，扭矩为420lbi·ft。在双辊连铸过程中施加在铸辊上的总铸轧力为10800N。自铸辊导出的铸带经过一道次热轧轧制成1.2mm的热轧薄带钢，带钢板形轮廓平滑，无局部高点，经卷取机卷取成卷，钢卷表面平滑，无起筋。
实施例3
冶炼合格的钢水经过一对相向旋转的铸辊导出形成铸带，每支铸辊背部紧贴有一支与该铸辊旋转方向相同的辊刷。铸辊长度为1590mm，辊刷缠有刷毛部分的轴长为1780mm，辊刷的直径为241mm，沿轴向辊刷直径偏差为0.11mm。刷毛的纳米硬度为5GPa，直径为0.154mm，刷毛密度为85根/100mm。辊刷的动平衡为21g。控制辊刷的转速为348rpm，扭矩为395lbi·ft。在双辊连铸过程中施加在铸辊上的总铸轧力为15600N。自铸辊导出的铸带经过一道次热轧轧制成1.45mm的热轧薄带钢，带钢板形轮廓平滑，
无局部高点，经卷取机卷取成卷，钢卷表面平滑，无起筋。
以上所述仅是本发明的具体实施方式，应该指出，对于本技术领域的普通技术人员来说，不在脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明保护的范围。
Claims (12)
- 一种改善热轧薄带钢的局部高点的方法，其特征在于，所述方法包括：在双辊连铸过程中，在每支铸辊的背部设置与所述铸辊旋转方向相同的辊刷，以去除铸辊在浇铸过程中的表面沉积物，其中所述辊刷由辊轴和刷毛组成，刷毛沿辊轴的轴向方向及圆周方向分布，所述方法进一步包括：■将辊刷的转速控制在50～550rpm的范围；■将辊刷的扭矩控制在100～600lbi·ft的范围；■将施加在铸辊两端的铸轧力总和控制在1000～20000N的范围。
- 根据权利要求1所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将辊刷的转速控制在200～450rpm的范围。
- 根据权利要求1所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将辊刷的扭矩控制在300～450lbi·ft的范围。
- 根据权利要求1所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将施加在铸辊两端的铸轧力总和控制在8000～16000N的范围。
- 根据权利要求1所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将辊刷的动平衡值控制在100g以下。
- 根据权利要求1所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将辊刷表面缠有刷毛的轴向长度与铸辊的轴长之间的差值控制为小于300mm的范围。
- 根据权利要求1所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将辊刷的辊轴缠好刷毛后的直径控制在245～255mm的范围。
- 根据权利要求1所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将缠有刷毛的辊刷沿轴向的直径偏差控制在小于0.18mm的范围。
- 根据权利要求1-8中任一项所述的改善热轧薄带钢的局部高点的方法，其特征在于，辊刷的刷毛材质为不锈钢或碳钢，所述方法进一步包括：■将刷毛的纳米硬度值控制在4～10Gpa的范围。
- 根据权利要求1-8中任一项所述的改善热轧薄带钢的局部高点的方法，其特征在于，辊刷的刷毛材质为不锈钢或碳钢，所述方法进一步包括：■将刷毛的钢丝直径在0.145～0.155mm的范围。
- 根据权利要求1-8中任一项所述的改善热轧薄带钢的局部高点的方法，其特征在于，所述方法进一步包括：■将刷毛的线密度控制在50～180根/100mm的范围。
- 一种热轧薄带钢，其特征在于，所述热轧薄带钢在生产过程中采用根据权利要求1-11中任一项所述的方法控制局部高点。
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Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177311A (ja) * | 1991-12-27 | 1993-07-20 | Nippon Steel Corp | 薄板連続鋳造機用のブラシ喰込み量を制御する方法及びその装置 |
| US20080011449A1 (en) * | 2004-12-13 | 2008-01-17 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| JP2009248135A (ja) * | 2008-04-07 | 2009-10-29 | Ihi Corp | 双ロール鋳造機の操業方法及び冷却ロール清掃装置 |
| CN102950276A (zh) * | 2011-08-30 | 2013-03-06 | 宝山钢铁股份有限公司 | 一种双辊薄带连铸辊面清理方法和装置 |
| KR20140000796A (ko) * | 2012-06-25 | 2014-01-06 | 주식회사 포스코 | 브러쉬 장치 |
| CN105149533A (zh) * | 2015-09-30 | 2015-12-16 | 宝山钢铁股份有限公司 | 一种薄带连铸结晶辊辊面清理装置及清理方法 |
| CN106583450A (zh) * | 2016-12-27 | 2017-04-26 | 中铝瑞闽股份有限公司 | 一种5182合金宽幅薄带生产工艺 |
| CN111872134A (zh) * | 2020-08-04 | 2020-11-03 | 中铝东南材料院（福建）科技有限公司 | 一种铝热轧辊刷均匀性的检测方法 |
| CN112296285A (zh) * | 2020-09-18 | 2021-02-02 | 江苏沙钢集团有限公司 | 一种改善双辊铸轧薄带褶皱的方法 |
| CN113664047A (zh) * | 2021-08-11 | 2021-11-19 | 山东钢铁集团日照有限公司 | 一种消除供冷轧料宽厚规格热轧局部高点的生产方法 |
| CN114164361A (zh) * | 2021-12-09 | 2022-03-11 | 厦门厦顺铝箔有限公司 | 一种高延展高深冲动力铝塑膜用铝箔及其生产工艺 |
| CN114515823A (zh) * | 2022-01-28 | 2022-05-20 | 青岛正望新材料股份有限公司 | 一种双辊薄带连铸辊面清理方法和装置 |
| CN115625202A (zh) * | 2022-09-27 | 2023-01-20 | 张家港中美超薄带科技有限公司 | 一种改善热轧薄带钢的局部高点的方法 |
-
2022
- 2022-09-27 CN CN202211185066.3A patent/CN115625202A/zh active Pending
-
2023
- 2023-08-04 WO PCT/CN2023/111281 patent/WO2024066742A1/zh unknown
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05177311A (ja) * | 1991-12-27 | 1993-07-20 | Nippon Steel Corp | 薄板連続鋳造機用のブラシ喰込み量を制御する方法及びその装置 |
| US20080011449A1 (en) * | 2004-12-13 | 2008-01-17 | Nucor Corporation | Method and apparatus for controlling the formation of crocodile skin surface roughness on thin cast strip |
| JP2009248135A (ja) * | 2008-04-07 | 2009-10-29 | Ihi Corp | 双ロール鋳造機の操業方法及び冷却ロール清掃装置 |
| CN102950276A (zh) * | 2011-08-30 | 2013-03-06 | 宝山钢铁股份有限公司 | 一种双辊薄带连铸辊面清理方法和装置 |
| KR20140000796A (ko) * | 2012-06-25 | 2014-01-06 | 주식회사 포스코 | 브러쉬 장치 |
| CN105149533A (zh) * | 2015-09-30 | 2015-12-16 | 宝山钢铁股份有限公司 | 一种薄带连铸结晶辊辊面清理装置及清理方法 |
| CN106583450A (zh) * | 2016-12-27 | 2017-04-26 | 中铝瑞闽股份有限公司 | 一种5182合金宽幅薄带生产工艺 |
| CN111872134A (zh) * | 2020-08-04 | 2020-11-03 | 中铝东南材料院（福建）科技有限公司 | 一种铝热轧辊刷均匀性的检测方法 |
| CN112296285A (zh) * | 2020-09-18 | 2021-02-02 | 江苏沙钢集团有限公司 | 一种改善双辊铸轧薄带褶皱的方法 |
| CN113664047A (zh) * | 2021-08-11 | 2021-11-19 | 山东钢铁集团日照有限公司 | 一种消除供冷轧料宽厚规格热轧局部高点的生产方法 |
| CN114164361A (zh) * | 2021-12-09 | 2022-03-11 | 厦门厦顺铝箔有限公司 | 一种高延展高深冲动力铝塑膜用铝箔及其生产工艺 |
| CN114515823A (zh) * | 2022-01-28 | 2022-05-20 | 青岛正望新材料股份有限公司 | 一种双辊薄带连铸辊面清理方法和装置 |
| CN115625202A (zh) * | 2022-09-27 | 2023-01-20 | 张家港中美超薄带科技有限公司 | 一种改善热轧薄带钢的局部高点的方法 |
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