WO2013123682A1 - 减少热轧中间坯头尾切舍量的连铸板坯头尾形状预控方法 - Google Patents

减少热轧中间坯头尾切舍量的连铸板坯头尾形状预控方法 Download PDF

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Publication number
WO2013123682A1
WO2013123682A1 PCT/CN2012/072299 CN2012072299W WO2013123682A1 WO 2013123682 A1 WO2013123682 A1 WO 2013123682A1 CN 2012072299 W CN2012072299 W CN 2012072299W WO 2013123682 A1 WO2013123682 A1 WO 2013123682A1
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WIPO (PCT)
Prior art keywords
slab
head
tail
shape
continuous casting
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PCT/CN2012/072299
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English (en)
French (fr)
Inventor
单旭沂
张所全
黄利
丁鸿儒
王自强
朱蔚林
王全胜
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宝山钢铁股份有限公司
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Application filed by 宝山钢铁股份有限公司 filed Critical 宝山钢铁股份有限公司
Priority to UAA201405499A priority Critical patent/UA108962C2/ru
Priority to RU2014110123/02A priority patent/RU2588756C2/ru
Priority to BR112014002367-0A priority patent/BR112014002367B1/pt
Priority to US14/236,609 priority patent/US9914167B2/en
Priority to KR1020137032911A priority patent/KR101516910B1/ko
Priority to JP2014523171A priority patent/JP2014521517A/ja
Priority to EP12869195.3A priority patent/EP2818259B1/en
Priority to ES12869195T priority patent/ES2935758T3/es
Publication of WO2013123682A1 publication Critical patent/WO2013123682A1/zh

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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • 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
    • B22D11/12—Accessories for subsequent treating or working cast stock in situ
    • B22D11/126—Accessories for subsequent treating or working cast stock in situ for cutting
    • 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
    • B22D11/163—Controlling or regulating processes or operations for cutting cast stock
    • 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
    • B21B1/466—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 in a non-continuous process, i.e. the cast being cut before rolling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
    • B21B15/0007—Cutting or shearing the product
    • B21B2015/0014—Cutting or shearing the product transversely to the rolling direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes

Definitions

  • Pre-control method for continuous casting slab head and tail shape for reducing the amount of head and tail cut of hot rolled intermediate blanks
  • the invention relates to a method for pre-controlling the shape of a head and tail of a continuous casting slab. Background technique
  • the hot rolled billet is changed from the original rolled billet to the continuous billet. More than 90% of the hot rolled billets are from continuous casting.
  • the molten steel is cast by continuous casting and cut after solidification, and the cut continuous cast slab is sent to hot rolling for rolling.
  • all methods of cutting a continuous casting billet into a square shape are adopted internationally.
  • the conventional hot continuous rolling production line consists of heating furnace, rough rolling, finish rolling, laminar cooling and coiling equipment.
  • Rolling mill, descaling machine, slab constant width press, roughing mill, measuring instrument, etc. are arranged in the rough rolling zone. device.
  • the roughing mill generally consists of a horizontal rolling mill and an auxiliary vertical rolling mill, and can perform reversible reversible rolling to perform thickness reduction and width reduction control.
  • a typical rolling line equipment layout is shown in Figure 1.
  • the temperature drop during hot rolling production has a major impact on material properties and rolling stability.
  • the entire line In order to ensure the rolling temperature of the finishing, the entire line must be produced with the least number of passes and the fastest speed to reduce heat loss. If the number of times of processing in an equipment is even, there must be a void in the material being transported, resulting in unwarranted temperature loss. Therefore, in order to minimize the temperature drop of the material, the number of processing is always odd for a rolling equipment.
  • the number of passes of R1/R2 is 1/1. 5, 3/3, etc.
  • the head-to-tail deformation process of the material is not symmetrical. This asymmetry in the deformation process will result in asymmetry in the shape of the head and tail after material processing.
  • a typical cuboid slab will be processed by a roughing mill to form a fishbill-like intermediate blank, as shown in Figure 2.
  • Hot-rolled thin gauge strips use a high-speed rolling process in finishing rolling to improve equipment utilization efficiency and reduce temperature drop during production.
  • the irregular head-to-tail shape of the intermediate blank after rough rolling will cause the material to cause an accident during the production of the finishing mill, the head cannot be smoothly worn, and the tail cannot achieve smooth rolling. Therefore, it is necessary to set a set of flying shear equipment between the finishing mill and the roughing mill to cut off the irregular portion of the intermediate blank head and tail, which leads to the loss of the finished product rate in the production process and affects the production efficiency of the rolling line.
  • the intermediate blank head and tail cuts account for the hot rolled yield. About 30% of the loss.
  • the head and tail are cut off by 150mm, that is, the total cut is 300mm, and the amount of cut is about 0.5% of the total amount of the material. Therefore, improving the shape of the head and tail of the intermediate blank and minimizing the head and tail cut are an important issue for steel producers.
  • the object of the present invention is to provide a method for pre-controlling the shape of the head and tail of a continuous casting slab which reduces the amount of head and tail cut of the hot rolled intermediate blank, and the pre-control method can greatly reduce the length of the uneven deformation portion of the intermediate blank head and tail, Reduce the purpose of hot-rolling intermediate blanks.
  • a pre-control method for reducing the shape of the head and tail of a continuous casting slab for reducing the amount of head and tail cut of the hot rolled intermediate blank adopting the pre-control cutting of the shape of the head and tail of the continuous casting blank, cutting the slab into a head end facing the inner recess, the slab The tail end faces the shape of the outer slab.
  • the head shape of the slab is matched with the shape of the tail of the previous slab, and the shape of the tail of the slab matches the shape of the head of the latter slab, that is, the front and rear slabs are cut by the same slab Down.
  • the shape of the head and tail of the continuous casting blank is pre-controlled and cut, and the shape of the head and tail of the slab is pre-controlled according to the curve of the center line of the width of the slab, and the shape of the head and tail of the cutting slab is controlled, and the bow height H, that is, the head concave or the tail convex The maximum value, the bow height H is controlled in the range of 0mm ⁇ 50mm.
  • the head is outwardly convex and the tail is inwardly recessed.
  • the shape of the head of the continuous casting blank is proposed to be the inner end of the head end.
  • the shape of the slab tail end protruding toward the outside of the slab, so that the length of the irregular portion of the intermediate billet tail is significantly shortened after the continuous casting billet is rolled by the hot rolling rough rolling equipment, thereby reducing the head and tail cutting amount and increasing the finished product rate. .
  • the method of cutting straight slabs currently used is changed.
  • control method of the present invention has the following beneficial effects:
  • the pre-controlled cutting method of the present invention can reduce the head-to-tail cutting loss, and the test shows that the hair is used Ming's pre-controlled cutting method can reduce the head and tail cutting loss by 20mm, that is, the cutting length in the head and tail can be reduced from the original 300mm to 260mm, which is reduced by 13.3%, and the comprehensive finished product rate is increased by about 0.05%.
  • the annual cut loss can be reduced by 0.5 million tons.
  • the benefit can be 10 million yuan.
  • the pre-controlled cutting method of the present invention can be realized by correspondingly modifying the continuous casting slab cutting equipment.
  • Figure 1 is a schematic view showing the configuration of a conventional hot rolling line equipment
  • Figure 2 is a schematic view showing the shape change of the material head and tail before and after hot rolling rough rolling
  • FIG. 3 is a schematic view of a pre-control method for the shape of the head and tail of a continuous casting slab according to the present invention (top view of the slab);
  • FIG. 4 is a schematic view of the curve cutting method of the present invention;
  • Figure 5 is a schematic view showing a straight line arc cutting method of the present invention.
  • Figure 6 is a schematic view of a folding line cutting method of the present invention.
  • FIG. 7 is a schematic view of a straight line plus fold line cutting method of the present invention.
  • Figure 8 is a schematic view of a trapezoidal wire cutting method of the present invention.
  • FIG. 9 is a schematic view of the multi-line cutting method of the present invention. Detailed description of the invention
  • a pre-control method for reducing the shape of the head and tail of a continuous casting slab for reducing the amount of head and tail of the hot rolled intermediate blank using the shape of the continuous casting blank head and tail to pre-control the cutting, cutting the slab into a head end facing the inner concave In advance, the slab tail end faces the outer convex shape of the slab.
  • the head shape of the slab is matched with the shape of the tail of the previous slab, and the shape of the tail of the slab matches the shape of the head of the latter slab, that is, the front and rear slabs are cut by the same slab Down.
  • the irregular deformation and width, width reduction, thickness, thickness reduction, slab heating temperature, steel type, load distribution of each frame, etc. of the slab during hot rolling and rough rolling are all certain. Correlation, where the total thickness reduction, width, and width reduction have the greatest impact on the shape of the head and tail.
  • the continuous casting slab generally cannot obtain the exact target finished product size data when cutting, it is impossible to determine the thickness and width data of the hot rolling intermediate blank, but the thickness of the intermediate blank of a hot rolling line has a certain range, according to this
  • the intermediate blank thickness range can roughly determine the total thickness reduction ratio of the slab in the rough rolling zone.
  • the intermediate billet range of the conventional hot strip rolling line is generally in the range of 35 mm to 65 mm.
  • the reduction ratio of the slab in the rough rolling zone is about 3.5 to 6.5 times. Based on this, the pre-control amount of the slab can be determined.
  • the specific pre-controlled shape is determined according to the function of the cutting machine.
  • the head of the first continuous casting slab can be cut according to the pre-control method of the present invention, or can be cut according to the existing straight line method; likewise, the tail of the last continuous casting sheet can be The cutting according to the pre-control method of the present invention can also be cut in the existing straight line manner.
  • the second continuous casting slab to the last penultimate continuous casting slab is cut according to the pre-control method of the continuous casting slab head and tail shape of the invention, so that the continuous casting slab is rolled by hot rolling and rough rolling equipment
  • the length of the irregular portion of the rear intermediate billet is significantly shortened, which can reduce the amount of head and tail cut and increase the yield.
  • the curve pre-control method pre-controls the shape of the slab head and tail according to the shape of the slab head and tail symmetrical according to the slab width center line curve, which can achieve the purpose of compensating for uneven deformation of the head and tail.
  • the bow height H that is, the maximum value of the head recess or the tail bulge, is controlled in the range of 0mm ⁇ 50mm, as shown in Figure 4; the preferred bow height H value range is 15mm ⁇ 30mmpsych
  • This solution is suitable for continuous casting slab cutting machines that can adjust the cutting curve according to the width and ensure the bow height.
  • Curves can be selected from arc segments, elliptical arc segments, sinusoids, polynomial curves, and so on.
  • the cutting curve can be determined according to the slab width W and the bow height H.
  • the shape calculation of the slab head is the same as the calculation of the shape of the slab head; the coordinates of the top position of the slab head are (0, 0), and the distance from the center line of the slab width For X, see Figure 4, the part is relative 2.
  • Pre-control method for straight line plus curved line If the continuous casting slab cutting machine cannot control the cutting curve according to the width, the straight-line plus curved line pre-control cutting scheme can be adopted.
  • the adjustment width of the middle portion is cut according to the curved line pre-control method, and the width of the two sides is cut in a straight line, and the two are added to form the shape of the head and tail of the slab, as shown in FIG. .
  • Folding line cutting method 1 Considering the convenience of continuous casting blank cutting, the folding line cutting method can also be adopted, as shown in Fig. 6.
  • the cutting line can be determined according to the slab width ⁇ and the bow height H.
  • the calculation of the shape of the slab tail is the same as the calculation of the shape of the slab head; the coordinates of the top position of the slab head shape are (0, 0), and the distance from the center line of the slab width is X, then the relative displacement y of the part relative to the top position coordinates (0, 0) of the slab can be calculated according to the following formula:
  • the edge is cut into a straight line on the basis of the folding line cutting method, that is, the folding line and the linear pre-control method are adopted.
  • the adjustment width of the middle portion is pre-controlled according to the folding line.
  • the shape of the head and tail is cut, and the widths of the two sides are cut in a straight line, and the two are added to form a shape of the head and the tail of the slab. As shown in Figure 7.
  • the cutting line can be determined according to the slab width ⁇ ⁇ , control width W ', bow height H.
  • the calculation of the shape of the slab tail is the same as the calculation of the shape of the slab head; the adjustment width of the middle part of the trapezoidal pre-controlled cutting method is cut in a straight line, and the two sides are cut by a diagonal line, and the two are added together.
  • the coordinates of the top middle position of the shape of the slab head are (0, 0), and the distance from the center line of the width of the slab is X, then the coordinates of the position relative to the top of the slab (0)
  • the relative displacement y of ,0) can be calculated according to the following formula:
  • multi-line pre-control cutting method as shown in Figure 9.
  • a plurality of fold lines are used to form a shape in which the head is recessed and the tail is convex.
  • slab cutting and rolling tests were carried out in hot rolling. Taking the test as an example to introduce the pre-control method of the shape of the head and tail of the slab, the amount of cut and cut of the intermediate billet and the amount of cut and the amount of cut Effect.
  • Slab condition In order to verify the control effect of the slab head and tail shape pre-controlling different bow heights, four sets of tests were designed. Two slabs of the same thickness and width are selected for each set of tests. One of the slabs is pre-controlled in shape of the head and tail (the curved arc of the head is concave, the curved arch of the tail is convex), and the other is Conventional cuboid slabs are used for comparison. A total of eight slabs were selected. The slab related data is shown in Table 1-1 to Table 1-4.
  • Table 1-1 The first set of test blanks (dimensions:
  • the pre-control of the shape of the slab head and tail used in this test adopts the arc segment curve control method.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Metal Rolling (AREA)
  • Continuous Casting (AREA)
  • Numerical Control (AREA)

Abstract

一种减少热轧中间坯头尾切舍量的连铸板坯头尾形状预控方法，采用连铸坯头尾形状预控切割，将板坯切割成头部端面向内部凹进，板坯尾部端面向板坯外部凸出的形状。将板坯头尾形状按以板坯宽度中心线对称的曲线预控切割板坯头尾形状，弓高，即头部凹进或尾部凸出部分的最大值，控制在0mm〜50mm范围内。能大幅度减少中间坯头尾不均匀变形部分的长度，达到减少热轧中间坯头尾切舍量的目的。

Description

减少热轧中间坯头尾切舍量的连铸板坯头尾形状预控方法 发明领域
本发明涉及一种连铸板坯头尾形状预控制方法。 背景技术
随着连铸 -热轧生产工艺的不断完善， 热轧坯料由原来的初轧坯改为连铸坯。 一般 90 %以上的热轧坯料来自于连铸。
钢水经过连铸浇铸并在凝固后进行切割， 切割后的连铸坯送往热轧进行轧制。 目前国际上全部采用将连铸坯切割成长方体形的方法。
常规热连轧生产线由加热炉、 粗轧、 精轧、 层流冷却及卷取设备构成， 在粗 轧区域设置有辊道、 除鳞机、 板坯定宽压力机、 粗轧机、 测量仪表等设备。 粗轧机 一般由水平轧机与附属立辊轧机组成，可进行往返可逆轧制以实施厚度减薄与宽度 减宽控制。 典型的轧线设备布置如图 1所示。
热轧生产过程中的温降对于材料性能与轧制稳定性有重大影响。 为了保证精 轧的轧制温度，全线必须采用最少道次及最快的速度生产以减少热量损失。如果在 某个设备的加工次数为偶数， 则必定有一个输送材料的空道次，会导致无端的温度 损失。 因此为了尽可能减少材料温降， 对于某个轧制设备， 加工次数总是奇数的， 如对于配置有两个粗轧轧机（Rl , R2 ) 的生产线， R1/R2 的道次数量为 1/5、 3/3 等。
由于加工过程的奇数特性以及立辊轧制的影响 , 材料的头尾变形过程是不对 称的。这种变形过程的不对称将导致材料加工后头尾形状的不对称。典型的长方体 板坯经过粗轧设备的加工后将形成鱼头燕尾状的中间坯， 如图 2所示。
热轧薄规格带钢在精轧采用高速轧制工艺以提高设备的利用效率并降低生产 过程中的温降。经过粗轧加工后中间坯不规则的头尾形状将导致材料在精轧机生产 时引发事故， 头部无法实现平稳穿带， 尾部也无法实现平稳的轧制。 因此需要在精 轧机与粗轧机之间设置一套飞剪设备将中间坯头尾不规则部分切除，导致生产过程 中成材率的损失， 影响轧线的生产效率。 根据经验， 中间坯头尾切损占热轧成材率 损失的 30%左右。一般按照中间坯长度 60m,头尾各切除 150mm即总体切除 300mm 计算， 切损量占材料总量的 0.5 %左右。 因此改善中间坯头尾形状， 尽可能减少头 尾切舍是钢铁生产企业的一个重要课题。
为了改善材料经过粗轧后中间坯头尾形状， 提高轧线生产的成材率， 技术人 员研究开发了许多生产设备与控制技术。如采用板坯大侧压设备进行宽度压下，对 粗轧区域立辊道次采用头尾短行程控制 ,以改善头尾形状。但即使采用了各种手段， 由于中间坯头尾形状不佳而导致的成材率损失仍然是一个主要的因素。 发明概述
本发明的目的在于提供一种减少热轧中间坯头尾切舍量的连铸板坯头尾形状 预控方法，该预控方法能大幅度减少中间坯头尾不均匀变形部分的长度， 达到减少 热轧中间坯头尾切舍量的目的。
为了实现上述目的， 本发明采用如下技术方案：
一种减少热轧中间坯头尾切舍量的连铸板坯头尾形状预控方法， 采用连铸坯 头尾形状预控切割，将板坯切割成头部端面向内部凹进，板坯尾部端面向板坯外部 凸出的形状。
所述板坯的头部形状与前一个板坯的尾部形状相配合， 所述板坯的尾部形状 与后一个板坯的头部形状相配合， 即前后板坯是由同一块连铸坯切割下来的。
所述采用连铸坯头尾形状预控切割， 将板坯头尾形状按以板坯宽度中心线对 称的曲线预控切割板坯头尾形状， 弓高 H, 即头部凹进或尾部凸出的最大值， 弓高 H控制在 0mm~50mm范围内。
本发明根据热轧中间坯头尾的形状一般为头部向外凸出、 尾部向内凹进， 通 过反向补偿原理，提出了预控连铸坯头尾形状为头部端面向内部凹进、板坯尾部端 面向板坯外部凸出的形状，使连铸坯经过热轧粗轧设备轧制后中间坯头尾不规则部 分的长度显著缩短，从而减少头尾切舍量并提高成材率。 改变了目前所采用的直线 切断连铸坯的方法。
本发明的控制方法与现有技术相比， 其有益效果是：
( 1 )本发明的预控切割方法能够减少头尾切割损失， 经试验表明， 采用本发 明的预控切割方法能够减少头尾切割损失各 20mm, 即可以在头尾切割长度从原来 的 300mm减少到 260mm, 减少 13.3 % , 提高综合成材率约 0.05 %。 对于一个年产 1000万吨的热轧带钢生产企业而言， 每年的切损量可以减少 0.5 万吨。 按照每吨 2000元效益计算， 可产生效益 1000万元。 同时也有明显的节能降耗作用。
( 2 )本发明的预控切割方法不影响连铸区域材料的成材率。
( 3 )对连铸板坯切割设备作相应改造， 即可实现本发明的预控切割方法。 附图说明
图 1为常规热轧生产线设备配置示意图；
图 2为热轧粗轧前后材料头尾形状变化示意图；
图 3为本发明的连铸板坯头尾形状预控方法示意图 （板坯俯视图） ； 图 4为本发明的曲线切割法示意图；
图 5为本发明的直线加弧形线切割法示意图；
图 6为本发明的折线切割法示意图；
图 7为本发明的直线加折线切割法示意图；
图 8为本发明的梯形线切割法示意图；
图 9为本发明的多折线切割法示意图。 发明的详细说明
下面结合附图和具体实施例对本发明作进一步说明。
参见图 3 , —种减少热轧中间坯头尾切舍量的连铸板坯头尾形状预控方法， 采 用连铸坯头尾形状预控切割，将板坯切割成头部端面向内部凹进，板坯尾部端面向 板坯外部凸出的形状。
所述板坯的头部形状与前一个板坯的尾部形状相配合， 所述板坯的尾部形状 与后一个板坯的头部形状相配合， 即前后板坯是由同一块连铸坯切割下来的。
板坯在热轧粗轧过程中头尾形状的不规则变形与宽度、 宽度压下量、 厚度、 厚度压下量、 板坯加热温度、 钢种、 各机架的负荷分配等均有一定的相关性， 其中 总的厚度压下量、 宽度以及宽度压下量对头尾形状的影响最大。 虽然连铸板坯在切割时一般还无法获得确切的目标成品尺寸数据， 也无法确 定热连轧中间坯的厚度与宽度数据，但一条热轧生产线的中间坯厚度是有一定范围 的，根据此中间坯厚度范围可以大致确定板坯在粗轧区域的总的厚度压下比。常规 热连轧生产线的中间坯范围一般在 35mm~65mm范围 ,按连铸坯厚度 230mm计算 , 板坯在粗轧区域的压下比约为 3.5~6.5倍。 据此可以确定板坯的预控量。 具体的预 控形状要根据切割机的功能确定。
连铸线生产板坯时， 第一块连铸板坯的头部可以按本发明的预控法进行切割， 也可以按现有的直线方式切割； 同样， 最后一块连铸板料的尾部可以按本发明的预 控法进行切割，也可以按现有的直线方式切割。从第二块连铸板坯至最后的倒数第 二块连铸板坯按本发明的连铸板坯头尾形状预控方法进行切割，从而使连铸板坯经 过热轧粗轧设备轧制后中间坯头尾不规则部分的长度显著缩短，能减少头尾切舍量 并提高成材率。
下面对于连铸板坯头尾形状预控方法进行详细描述。
1、 曲线预控方法， 将板坯头尾形状按以板坯宽度中心线对称的曲线预控切割 板坯头尾形状， 可以达到补偿头尾不均匀变形的目的。 弓高 H, 即头部凹进或尾部 凸出的最大值， 控制在 0mm~50mm范围内， 如图 4所示； 较佳的弓高 H数值范围 在 15mm~30mm„
这种方案适用于连铸板坯切割机能够根据宽度调整切割曲线并保证弓高的情 况。
曲线可以选用圓弧段、 椭圓弧段、 正弦曲线、 多项式曲线等。
以圓弧段曲线控制方式为例， 切割曲线可根据板坯宽度 W、 弓高 H确定。 以 板坯头形状计算为例，板坯尾形状的计算与板坯头形状的计算相同；设板坯头形状 的弧顶部位的坐标为 (0,0), 距离板坯宽度中心线的距离为 X, 参见图 4, 则该部位 相对
Figure imgf000005_0001
2、直线加弧形线预控方法，如果连铸板坯切割机无法根据宽度控制切割曲线， 则可采用直线加弧形线预控切割方案。 当板坯宽度较宽时， 中间部分的调控宽度按 弧形线预控方法切割头尾形状， 两边部的宽度按直线切割，二者相加后构成板坯头 尾形状， 如图 5所示。
3、折线切割方法一， 考虑到连铸坯切割的方便性，也可以采用折线切割方法， 如图 6所示。 切割线可根据板坯宽度\¥、 弓高 H确定。 以板坯头形状计算为例， 板坯尾形状的计算与板坯头形状的计算相同； 设板坯头形状的顶部位置的坐标为 (0,0), 距离板坯宽度中心线的距离为 X, 则该部位相对于板坯顶部位置坐标 (0,0)的 相对位移 y可以根据下式计算：
y = ^- bs(x) -—≤ x≤―
W 、 ） 其中 2 2 。
4、 折线切割方法二
考虑到粗轧轧制稳定性， 在折线切割法一的基础上将边部切割成直线， 即采 用折线加直线预控方式， 当板坯宽度较宽时， 中间部分的调控宽度按折线预控方式 切割头尾形状， 两边部的宽度按直线切割， 二者相加后构成板坯头尾形状。 如图 7 所示。
5、梯形切割方法，梯形预控切割方法如图 8所示，切割线可根据板坯宽度\¥、 调控宽度 W'、 弓高 H确定。 以板坯头形状计算为例， 板坯尾形状的计算与板坯头 形状的计算相同；梯形预控切割法的中间部分的调控宽度按直线切割， 两边部按斜 线切割， 二者相加后构成板坯头尾形状； 设板坯头形状的顶部中间位置的坐标为 (0,0),距离板坯宽度中心线的距离为 X,则该部位相对于板坯顶部中间位置坐标 (0,0) 的相对位移 y可以根据下式计算：
Figure imgf000006_0001
6、 多折线预控切割方法， 如图 9所示。 用多条折线形成头部凹进， 尾部凸出 的形状。
实施例
为了验证板坯头尾形状预控效果， 在热轧进行了板坯切割、 轧制试验。 以试 验为例介绍板坯头尾形状的预控方式、轧制后中间坯头尾切舍量以及对减少切舍量 的效果。
板坯情况： 为了验证板坯头尾形状预控不同弓高情况下的控制效果， 设计了 四组试验。每组试验选用相同厚度与宽度规格的两块板坯，其中一块板坯进行头尾 形状预控（头部弧形弓高为内凹状， 尾部弧形弓高为外凸状）， 另一块为常规的长 方体板坯作比对之用。 共选用了八块板坯。 板坯相关的数据见表 1-1至表 1-4。
表 1-1 第一组试验坯 （尺寸单位：
Figure imgf000007_0001
本次试验采用的板坯头尾形状预控均采用圓弧段曲线控制方法。
分组试睑时， 同一组板坯采用相同的加热与轧制工艺。 中间坯头尾切舍量结 果如表 2- 1至表 2-4所示， 其中表中的切舍面积为头尾形状检测仪图形面积， 而非 实物的表面积。 表 2-1 第一组试验坯结果 （切舍面积单位： cm2 )
Figure imgf000008_0001
结论： 以上四组试验结果表明经过形状预控后的板坯经粗轧机组轧制后中间 坯的头尾切舍量均有所下降。 不同弓高情况下的切舍量下降幅度不同，试验条件下 最高下降了 35.56%, 效果明显。
以上仅为本发明的较佳实施例而已， 并非用于限定本发明的保护范围， 因此， 凡在本发明的精神和原则之内所作的任何修改、 等同替换、 改进等， 均应包含在本 发明的保护范围之内。

Claims

权 利 要 求 书
1、一种减少热轧中间坯头尾切舍量的连铸板坯头尾形状预控方法，其特征是: 采用连铸坯头尾形状预控切割，将板坯切割成头部端面向内部凹进，板坯尾部端面 向板坯外部凸出的形状。
2、 根据权利要求 1所述的连铸板坯头尾形状预控方法， 其特征是： 所述板坯 的头部形状与前一个板坯的尾部形状相配合，所述板坯的尾部形状与后一个板坯的 头部形状相配合， 即前后板坯是由同一块连铸坯切割下来的。
3、 根据权利要求 1或 2所述的连铸板坯头尾形状预控方法， 其特征是： 所述 采用连铸坯头尾形状预控切割，将板坯头尾形状按以板坯宽度中心线对称的曲线预 控切割板坯头尾形状， 弓高 H, 即头部凹进或尾部凸出的最大值， 弓高 H控制在 0mm~50mm范围内。
4、 根据权利要求 3所述的连铸板坯头尾形状预控方法， 其特征是： 所述曲线 为圓弧段、 椭圓弧段、 正弦曲线或多项式曲线。
5、 根据权利要求 3所述的连铸板坯头尾形状预控方法， 其特征是： 所述曲线 为圓弧段曲线预控方式， 切割曲线根据板坯宽度 W、 弓高 H确定， 设板坯弧顶部 位的坐标为 (0,0), 距离板坯宽度中心线的距离为 X, 则该部位相对于弧顶中部坐标 (0,0)的相对位移 y可以根据下式计算：
2 + W 2 + W
y - - X
2H 2H
Figure imgf000009_0001
6、 根据权利要求 5所述的连铸板坯头尾形状预控方法， 其特征是： 所述曲线 为直线加弧形线预控方式， 当板坯宽度较宽时， 中间部分的调控宽度按弧形线预控 方式切割头尾形状， 两边部的宽度按直线切割， 二者相加后构成板坯头尾形状。
7、 根据权利要求 3所述的连铸板坯头尾形状预控方法， 其特征是： 所述曲线 为折线预控方式， 切割线根据板坯宽度 W、 弓高 H确定， 设板坯顶部位置的坐标 为（0,0) , 距离板坯宽度中心线的距离为 X, 则该部位相对于板坯顶部位置坐标 (0,0) 的相对位移 y可以根据下式计算：
y = ^- bs(x) -—≤ x≤―
W 、 ） 其中 2 2 。
8、 根据权利要求 7所述的连铸板坯头尾形状预控方法， 其特征是： 所述曲线 为折线加直线预控方式， 当板坯宽度较宽时， 中间部分的调控宽度按折线预控方式 切割头尾形状， 两边部的宽度按直线切割， 二者相加后构成板坯头尾形状。
9、 根据权利要求 3所述的连铸板坯头尾形状预控方法， 其特征是： 所述曲线 为梯形预控方式， 切割线可根据板坯宽度\¥、 调控宽度 W'、 弓高 H确定， 设板坯 顶部中间位置的坐标为（0,0) , 距离板坯宽度中心线的距离为 X, 则该部位相对于板 坯顶部中间位置坐标 (0,0)的相对位移 y可以 居下式计算：
Figure imgf000010_0001
10、 根据权利要求 3 所述的连铸板坯头尾形状预控方法， 其特征是： 所述曲 线为多折线预控方式。
1 1、 根据权利要求 3 所述的连铸板坯头尾形状预控方法， 其特征是： 所述弓 高 H控制在 15mm~30mm范围内。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI587936B (zh) * 2015-05-20 2017-06-21 東芝三菱電機產業系統股份有限公司 前尾端板寬控制裝置
CN114406013A (zh) * 2022-01-26 2022-04-29 北京首钢股份有限公司 一种更新粗轧侧压机轧制策略的方法、装置、设备及介质

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103862248A (zh) * 2014-03-19 2014-06-18 德龙钢铁有限公司 一种有效预防热轧过程头尾表面缺陷产生的方法
CN104841902B (zh) * 2015-05-15 2017-03-08 北京首钢自动化信息技术有限公司 一种快速更换中间包期间铸坯生产计划的优化装置及方法
CN105458202B (zh) * 2015-12-03 2017-06-20 武汉钢铁(集团)公司 一种连铸板坯切割跟踪方法
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CN115138678A (zh) * 2022-07-12 2022-10-04 河南中孚高精铝材有限公司 一种铝热连轧粗轧机快速轧制方法及系统
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55153602A (en) * 1979-05-21 1980-11-29 Ishikawajima Harima Heavy Ind Co Ltd Width-reducing rolling method
JPS564301A (en) * 1979-06-23 1981-01-17 Sumitomo Metal Ind Ltd Adjusting method for sectional shape of continuously cast billet
JPH08309401A (ja) * 1995-05-16 1996-11-26 Kobe Steel Ltd スラブ及びスラブ前後端加工方法
CN1439464A (zh) * 2003-03-25 2003-09-03 鞍钢集团新钢铁有限责任公司 中薄板坯连铸连轧板形综合控制方法
CN101670372A (zh) * 2009-09-25 2010-03-17 首钢总公司 一种消除热轧高强钢板形缺陷的方法
CN201684903U (zh) * 2010-05-13 2010-12-29 武汉钢铁(集团)公司 新型连铸板坯及切割该连铸板坯的切割枪

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235144A (en) * 1975-09-13 1977-03-17 Nippon Steel Corp Continuous casting slab and the rolling method
JPS6015401B2 (ja) * 1979-04-19 1985-04-19 石川島播磨重工業株式会社 強幅圧下圧延方法及び装置
JPS57199502A (en) * 1981-05-30 1982-12-07 Sumitomo Metal Ind Ltd Preforming method for steel ingot
DE3151384A1 (de) * 1981-12-24 1983-07-07 Thyssen AG vorm. August Thyssen-Hütte, 4100 Duisburg Verfahren zum messen der breite, insbesondere des kopfes, von selbstleuchtendem walzgut und verfahren zum schopfen des kopfes von selbstleuchtendem walzgut
JPS61135401A (ja) * 1984-12-05 1986-06-23 Kawasaki Steel Corp 連鋳スラブの幅圧下方法
JPH0679721B2 (ja) * 1986-12-01 1994-10-12 川崎製鉄株式会社 スラブの幅圧下方法
US5133205A (en) * 1990-11-13 1992-07-28 Mannesmann Aktiengesellschaft System and process for forming thin flat hot rolled steel strip
DE19900779B4 (de) * 1999-01-12 2010-04-01 Sms Siemag Aktiengesellschaft Verfahren zum Walzen von Metallband und Anlage zur Durchführung des Verfahrens
US6453712B1 (en) * 2000-06-07 2002-09-24 Alcoa Inc. Method for reducing crop losses during ingot rolling
DE10318286B3 (de) * 2003-04-22 2004-10-21 Thyssenkrupp Stahl Ag Verfahren zum Herstellen von warmverformten Metallflachprodukten aus Brammen

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55153602A (en) * 1979-05-21 1980-11-29 Ishikawajima Harima Heavy Ind Co Ltd Width-reducing rolling method
JPS564301A (en) * 1979-06-23 1981-01-17 Sumitomo Metal Ind Ltd Adjusting method for sectional shape of continuously cast billet
JPH08309401A (ja) * 1995-05-16 1996-11-26 Kobe Steel Ltd スラブ及びスラブ前後端加工方法
CN1439464A (zh) * 2003-03-25 2003-09-03 鞍钢集团新钢铁有限责任公司 中薄板坯连铸连轧板形综合控制方法
CN101670372A (zh) * 2009-09-25 2010-03-17 首钢总公司 一种消除热轧高强钢板形缺陷的方法
CN201684903U (zh) * 2010-05-13 2010-12-29 武汉钢铁(集团)公司 新型连铸板坯及切割该连铸板坯的切割枪

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2818259A4 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI587936B (zh) * 2015-05-20 2017-06-21 東芝三菱電機產業系統股份有限公司 前尾端板寬控制裝置
CN114406013A (zh) * 2022-01-26 2022-04-29 北京首钢股份有限公司 一种更新粗轧侧压机轧制策略的方法、装置、设备及介质
CN114406013B (zh) * 2022-01-26 2023-09-22 北京首钢股份有限公司 一种更新粗轧侧压机轧制策略的方法、装置、设备及介质

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EP2818259A1 (en) 2014-12-31
KR20140005374A (ko) 2014-01-14
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EP2818259B1 (en) 2022-11-30
JP2014521517A (ja) 2014-08-28
CN103252347A (zh) 2013-08-21
US20140352504A1 (en) 2014-12-04
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