CN108393359A - Rolling method of wedge-shaped L P steel plate - Google Patents
Rolling method of wedge-shaped L P steel plate Download PDFInfo
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- CN108393359A CN108393359A CN201710068959.2A CN201710068959A CN108393359A CN 108393359 A CN108393359 A CN 108393359A CN 201710068959 A CN201710068959 A CN 201710068959A CN 108393359 A CN108393359 A CN 108393359A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
- B21B37/62—Roll-force control; Roll-gap control by control of a hydraulic adjusting device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/04—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing
- B21B45/08—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for de-scaling, e.g. by brushing hydraulically
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2205/00—Particular shaped rolled products
- B21B2205/04—Taper- or wedge-shaped profiles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2261/00—Product parameters
- B21B2261/02—Transverse dimensions
- B21B2261/04—Thickness, gauge
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2265/00—Forming parameters
- B21B2265/10—Compression, e.g. longitudinal compression
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B2275/00—Mill drive parameters
- B21B2275/02—Speed
- B21B2275/06—Product speed
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Abstract
本发明涉及一种楔形LP钢板的轧制方法，包括：1)钢坯加热温度范围控制；2)高压水除鳞；3)轧制开始后，每个道次均通过控制轧机液压缸油柱高度变化来连续改变辊缝距离，通过每道次间的迭代计算，实现钢板纵向厚度的连续变化；同时根据钢板的实际厚度调整轧机预设定模型的辊缝自学习系数；同时控制开轧温度、终轧温度、压下率、轧制速度；4)控制冷却开始温度、返红温度和冷却速度；本发明通过对加热、轧制和冷却过程的精确控制，有效改善楔形LP钢板的板形、表面质量和整体性能，特别适用于厚度变化范围大的楔形钢板生产，且可操作性强，生产效率高。
The invention relates to a rolling method of a wedge-shaped LP steel plate, comprising: 1) controlling the heating temperature range of a billet; 2) descaling with high-pressure water; 3) after the rolling starts, controlling the height of the oil column of the hydraulic cylinder of the rolling mill for each pass Change to continuously change the roll gap distance, through the iterative calculation between each pass, to realize the continuous change of the longitudinal thickness of the steel plate; at the same time adjust the roll gap self-learning coefficient of the preset model of the rolling mill according to the actual thickness of the steel plate; at the same time control the starting temperature, Finish rolling temperature, reduction rate, rolling speed; 4) control cooling start temperature, reddening temperature and cooling speed; the present invention effectively improves the plate shape, Surface quality and overall performance, especially suitable for the production of wedge-shaped steel plates with a wide range of thickness variations, and has strong operability and high production efficiency.
Description
技术领域technical field
本发明涉及冶金技术领域，尤其涉及一种楔形LP钢板的轧制方法。The invention relates to the technical field of metallurgy, in particular to a rolling method of a wedge-shaped LP steel plate.
背景技术Background technique
LP(纵向变厚度)钢板是指厚度沿轧制方向连续变化的具有特殊纵向形状的钢板，是在轧制过程中通过连续改变轧辊的开口度来改变纵向厚度的钢板。由于纵向变厚度钢板可根据承受载荷的情况来改变其厚度，因而可优化桥梁、船体、建筑等结构断面的设计，不仅可减少钢材用量、减少焊接次数，而且可通过连接处的等厚化改善操作性，如省略垫板和锥度加工等。LP (longitudinal variable thickness) steel plate refers to a steel plate with a special longitudinal shape whose thickness changes continuously along the rolling direction. It is a steel plate whose longitudinal thickness is changed by continuously changing the opening of the roll during the rolling process. Since the longitudinal variable thickness steel plate can change its thickness according to the load bearing conditions, it can optimize the design of structural sections such as bridges, hulls, buildings, etc., which can not only reduce the amount of steel used, reduce the number of welding times, but also improve the thickness of the joints through equal thickness Operability, such as omission of backing plate and taper processing, etc.
申请号为CN200910175208.6的中国专利，公开了“一种用于轧制楔形钢板的厚度控制方法”，楔形钢板的轧制过程为：前若干道次按照常规矩形钢板轧制技术轧制，末道次由TDC控制器控制轧机液压缸油柱高度变化，连续改变辊缝距离，实现钢板纵向厚度的连续变化；由于该方法是在轧制的末道次轧制出横向楔形钢板，也就是仅由一道次轧制来完成楔形钢板的轧制，必然导致其厚度变化范围较小，钢板板型较差的问题。The Chinese patent with the application number CN200910175208.6 discloses "a thickness control method for rolling wedge-shaped steel plates". The rolling process of wedge-shaped steel plates is as follows: the first few passes are rolled according to the conventional rectangular steel plate rolling technology, The pass is controlled by the TDC controller to control the height change of the oil column of the hydraulic cylinder of the rolling mill, and the distance between the roll gaps is continuously changed to realize the continuous change of the longitudinal thickness of the steel plate; Completing the rolling of the wedge-shaped steel plate by rolling in one pass will inevitably lead to the problems that its thickness variation range is small and the shape of the steel plate is poor.
申请号为CN201310227028.4的中国专利，公开了“一种横向楔形轧制变厚度钢板的生产方法”，包括横向轧制：在横轧阶段末道次轧制时，按照钢板头部和尾部平均厚度设定值对钢板进行纵向变截面轧制；纵向轧制；首先，在纵轧阶段，按照横轧阶段产生的头尾纵向变厚度值进行横向等比例楔形轧制；然后，按照轧制规程分配采用影响函数方法确定辊缝调整量和弯辊力设定值，保证纵轧道次的横向厚度分布满足等比例楔形要求。由于该方法是在横向轧制的末道次设定辊缝参数轧制出横向楔形钢板，必然导致其厚度变化范围较小，钢板板型较差且无法在矫直机上进行矫正导致废板率增加。The Chinese patent with the application number CN201310227028.4 discloses "a production method for transverse wedge rolling of variable-thickness steel plates", including transverse rolling: during the final pass of the transverse rolling stage, the average of the head and tail of the steel plate is The thickness setting value is used to carry out longitudinal variable cross-section rolling of the steel plate; longitudinal rolling; first, in the longitudinal rolling stage, carry out horizontal equal-proportion wedge rolling according to the head and tail longitudinal variable thickness values generated in the horizontal rolling stage; then, according to the rolling schedule The distribution adopts the influence function method to determine the adjustment amount of the roll gap and the setting value of the roll bending force, so as to ensure that the transverse thickness distribution of the longitudinal rolling pass meets the requirement of equal proportion wedge shape. Since this method is to set the roll gap parameters in the last pass of transverse rolling to roll out transverse wedge-shaped steel plates, it will inevitably lead to a small range of thickness variation, poor plate shape, and the inability to correct on the leveler, resulting in a scrap rate. Increase.
申请号为CN200610046457.1的中国专利，公开了“一种变厚度钢板的连续轧制方法”，首先钢板头尾各留出一定的裕量，为轧出最小厚度，根据轧制力模型算出轧件预计算塑性曲线，然后结合轧机弹跳曲线确定轧辊的辊缝，然后在该辊缝下进行轧制；在头部轧制过程中计算轧出长度，直至轧出长度等于L；头部过渡阶段轧制完成后，继续进行变厚度轧制；根据变厚度轧制长度的变化，辊缝进行相应的调整；上述轧制过程持续进行，直至变厚度段轧出长度等于L，此时轧件的厚度已经过渡到最大厚度，之后进行尾部轧制，基于预计算塑性曲线与实际塑性曲线存在的偏差，在尾部轧制过程中，根据实际计算出口厚度的差别，通过调整辊缝的位置，消除尾部厚度偏差，直至尾部轧制完成。采用本发明方法能够以方便快捷的工艺连续轧制变厚度钢板。该方法采用分段式轧制，在实际批量生产中会导致生产效率低，控制稳定差的缺点。The Chinese patent with the application number CN200610046457.1 discloses "a continuous rolling method for steel plates with variable thickness". Pre-calculate the plastic curve of the piece, and then combine the rolling mill bounce curve to determine the roll gap of the roll, and then roll under the roll gap; calculate the rolling length during the head rolling process until the rolling length is equal to L; the head transition stage After the rolling is completed, the variable thickness rolling is continued; according to the change of the variable thickness rolling length, the roll gap is adjusted accordingly; the above rolling process continues until the rolling length of the variable thickness section is equal to L, at this time the rolled piece The thickness has transitioned to the maximum thickness, and then the tail rolling is carried out. Based on the deviation between the pre-calculated plastic curve and the actual plastic curve, in the tail rolling process, according to the difference in the actual calculation of the exit thickness, the tail is eliminated by adjusting the position of the roll gap. Thickness deviation until tail rolling is complete. Adopting the method of the invention can continuously roll variable-thickness steel plates in a convenient and fast process. This method adopts segmental rolling, which will lead to the disadvantages of low production efficiency and poor control stability in actual mass production.
由以上分析可知，目前楔形LP钢板生产存在如下不足：From the above analysis, it can be seen that the current production of wedge-shaped LP steel plates has the following deficiencies:
1)钢板厚度变化规格较小，适用范围窄；1) The steel plate thickness change specification is small, and the scope of application is narrow;
2)采用末道次轧制钢板的楔形，控制精度较差；2) The wedge shape of the steel plate rolled in the last pass is adopted, and the control accuracy is poor;
3)生产工艺复杂，生产效率低，控制稳定性较差。3) The production process is complicated, the production efficiency is low, and the control stability is relatively poor.
发明内容Contents of the invention
本发明提供了一种楔形LP钢板的轧制方法，通过对加热、轧制和冷却过程的精确控制，有效改善楔形LP钢板的板形、表面质量和整体性能，特别适用于厚度变化范围大的楔形钢板生产，且可操作性强，生产效率高。The invention provides a rolling method of wedge-shaped LP steel plate, which can effectively improve the plate shape, surface quality and overall performance of wedge-shaped LP steel plate through precise control of the heating, rolling and cooling process, and is especially suitable for those with a large thickness variation range Wedge-shaped steel plate production, and strong operability, high production efficiency.
为了达到上述目的，本发明采用以下技术方案实现：In order to achieve the above object, the present invention adopts the following technical solutions to realize:
一种楔形LP钢板的轧制方法，所述楔形LP钢板的纵向截面沿中心线对称，其长度为L，且L≥1500mm；楔形LP钢板的薄端厚度为h1，厚端厚度为L2，且L2-L1≤60mm；楔形LP钢板的轧制方法包括如下步骤：A rolling method of a wedge-shaped LP steel plate, the longitudinal section of the wedge-shaped LP steel plate is symmetrical along the center line, the length thereof is L, and L≥1500mm; the thickness of the thin end of the wedge-shaped LP steel plate is h 1 , and the thickness of the thick end is L 2 , and L 2 -L 1 ≤60mm; the rolling method of wedge-shaped LP steel plate includes the following steps:
1)钢坯加热工艺：钢坯加热温度范围控制在1185～1210℃，且钢坯上表面温度比下表面温度高20～30℃；1) Billet heating process: the temperature range of billet heating is controlled at 1185-1210°C, and the temperature of the upper surface of the billet is 20-30°C higher than that of the lower surface;
2)钢坯出炉后，经压力≥15MPa的高压水除鳞；2) After the billet is out of the furnace, it is descaled by high-pressure water with a pressure ≥ 15MPa;
3)轧制工艺：开轧温度控制在1150～1180℃，终轧温度控制在1050～1080℃；轧制总压下率≥30％，单道次压下率≥10％；钢板轧制速度控制在2～10m/s；3) Rolling process: the starting rolling temperature is controlled at 1150-1180°C, the final rolling temperature is controlled at 1050-1080°C; the total rolling reduction rate is ≥30%, and the single-pass reduction rate is ≥10%; the steel plate rolling speed Control at 2~10m/s;
轧制开始后，每个道次均通过控制轧机液压缸油柱高度变化来连续改变辊缝距离，通过每道次间的迭代计算，实现钢板纵向厚度的连续变化；同时根据钢板的实际厚度调整轧机预设定模型的辊缝自学习系数，即通过厚度测量仪测量钢板实际厚度，将实际厚度与理论厚度比较，得到自辊缝自学习系数L1；具体计算过程如下：After the rolling starts, the roll gap distance is continuously changed by controlling the height of the oil column of the hydraulic cylinder of the rolling mill in each pass, and the continuous change of the longitudinal thickness of the steel plate is realized through iterative calculation between each pass; at the same time, it is adjusted according to the actual thickness of the steel plate The roll gap self-learning coefficient of the pre-set model of the rolling mill is to measure the actual thickness of the steel plate through a thickness gauge, and compare the actual thickness with the theoretical thickness to obtain the self-roll gap self-learning coefficient L 1 ; the specific calculation process is as follows:
L＝N×(MFH-GMH)L=N×(MFH-GMH)
L1＝B1×L+(1-B1)×LL 1 =B 1 ×L+(1-B 1 )×L
其中：L---辊缝自学习系数；Among them: L---roll gap self-learning coefficient;
N---补偿系数；N---compensation coefficient;
MFH---钢板测量厚度；MFH---Measuring thickness of steel plate;
GMH---钢板理论厚度；GMH---theoretical thickness of steel plate;
L1---辊缝自学习系数当前计算值；L 1 --- The current calculated value of the roll gap self-learning coefficient;
B1---平滑系数；B 1 --- smoothing coefficient;
根据辊缝自学习系数当前计算值L1计算辊缝值Gap，动态调整轧机辊缝，实现楔形LP钢板的轧制，Gap计算方法如下：Calculate the roll gap value Gap according to the current calculated value L1 of the roll gap self-learning coefficient, and dynamically adjust the roll gap of the rolling mill to realize the rolling of wedge-shaped LP steel plates. The Gap calculation method is as follows:
式中：Gap---辊缝设定计算值；In the formula: Gap---calculated value of roll gap setting;
Fh---板带出口厚度设定计算值；Fh --- The calculated value of the strip outlet thickness setting;
Gwid.lay1---宽度补偿增益；Gwid.lay1---width compensation gain;
WCX---宽度补偿；WCX---width compensation;
Goil.Lay1---油膜补偿增益；Goil.Lay1---oil film compensation gain;
M---轧机常数；M --- rolling mill constant;
S---有载辊缝；S---loaded roll gap;
S0---轧辊标定时的辊缝；S 0 --- roll gap during roll calibration;
F---油膜力；F---oil film force;
F0---标定时的油膜力；F 0 --- oil film force during calibration;
4)冷却工艺：冷却开始温度为1000～1050℃，返红温度为660～750℃；冷却速度为8～20℃/s。4) Cooling process: the cooling start temperature is 1000-1050°C, the redness temperature is 660-750°C; the cooling speed is 8-20°C/s.
所述补偿系数N用于对自学习数学模型进行修正，N的取值范围为：The compensation coefficient N is used to correct the self-learning mathematical model, and the value range of N is:
楔形LP钢板h1为10～80mm时，N为0.10～0.12；When h1 of wedge-shaped LP steel plate is 10-80mm, N is 0.10-0.12;
楔形LP钢板h1为81～130mm时，N为0.15～0.20；When h1 of wedge-shaped LP steel plate is 81-130mm, N is 0.15-0.20;
楔形LP钢板h1大于130mm时，N值为0.5。When the wedge-shaped LP steel plate h 1 is greater than 130mm, the N value is 0.5.
与现有技术相比，本发明的有益效果是：Compared with prior art, the beneficial effect of the present invention is:
1)通过对加热、轧制和冷却过程的精确控制，有效改善楔形LP钢板的板形、表面质量和整体性能，板形合格率97％以上，产品合格率100％；1) Through the precise control of the heating, rolling and cooling process, the shape, surface quality and overall performance of the wedge-shaped LP steel plate can be effectively improved, the pass rate of the shape is over 97%, and the pass rate of the product is 100%;
2)特别适用于厚度变化范围大的楔形钢板生产；2) It is especially suitable for the production of wedge-shaped steel plates with a wide range of thickness variations;
3)工艺过程简单，可操作性强，生产效率高。3) The technological process is simple, the operability is strong, and the production efficiency is high.
附图说明Description of drawings
图1是本发明所述楔形LP钢板的结构示意图。Fig. 1 is a structural schematic diagram of the wedge-shaped LP steel plate of the present invention.
具体实施方式Detailed ways
下面结合附图对本发明的具体实施方式作进一步说明：The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:
本发明所述一种楔形LP钢板的轧制方法，如图1所示，所述楔形LP钢板的纵向截面沿中心线对称，其长度为L，且L≥1500mm；楔形LP钢板的薄端厚度为h1，厚端厚度为L2，且L2-L1≤60mm；楔形LP钢板的轧制方法包括如下步骤：A rolling method of a wedge-shaped LP steel plate of the present invention, as shown in Figure 1, the longitudinal section of the wedge-shaped LP steel plate is symmetrical along the center line, its length is L, and L≥1500mm; the thin end thickness of the wedge-shaped LP steel plate is h 1 , the thickness of the thick end is L 2 , and L 2 -L 1 ≤60mm; the rolling method of wedge-shaped LP steel plate includes the following steps:
1)钢坯加热工艺：钢坯加热温度范围控制在1185～1210℃，且钢坯上表面温度比下表面温度高20～30℃；1) Billet heating process: the temperature range of billet heating is controlled at 1185-1210°C, and the temperature of the upper surface of the billet is 20-30°C higher than that of the lower surface;
2)钢坯出炉后，经压力≥15MPa的高压水除鳞；2) After the billet is out of the furnace, it is descaled by high-pressure water with a pressure ≥ 15MPa;
3)轧制工艺：开轧温度控制在1150～1180℃，终轧温度控制在1050～1080℃；轧制总压下率≥30％，单道次压下率≥10％；钢板轧制速度控制在2～10m/s；3) Rolling process: the starting rolling temperature is controlled at 1150-1180°C, the final rolling temperature is controlled at 1050-1080°C; the total rolling reduction rate is ≥30%, and the single-pass reduction rate is ≥10%; the steel plate rolling speed Control at 2~10m/s;
轧制开始后，每个道次均通过控制轧机液压缸油柱高度变化来连续改变辊缝距离，通过每道次间的迭代计算，实现钢板纵向厚度的连续变化；同时根据钢板的实际厚度调整轧机预设定模型的辊缝自学习系数，即通过厚度测量仪测量钢板实际厚度，将实际厚度与理论厚度比较，得到自辊缝自学习系数L1；具体计算过程如下：After the rolling starts, the roll gap distance is continuously changed by controlling the height of the oil column of the hydraulic cylinder of the rolling mill in each pass, and the continuous change of the longitudinal thickness of the steel plate is realized through iterative calculation between each pass; at the same time, it is adjusted according to the actual thickness of the steel plate The roll gap self-learning coefficient of the pre-set model of the rolling mill is to measure the actual thickness of the steel plate through a thickness gauge, and compare the actual thickness with the theoretical thickness to obtain the self-roll gap self-learning coefficient L 1 ; the specific calculation process is as follows:
L＝N×(MFH-GMH)L=N×(MFH-GMH)
L1＝B1×L+(1-B1)×LL 1 =B 1 ×L+(1-B 1 )×L
其中：L---辊缝自学习系数；Among them: L---roll gap self-learning coefficient;
N---补偿系数；N---compensation coefficient;
MFH---钢板测量厚度；MFH---Measuring thickness of steel plate;
GMH---钢板理论厚度；GMH---theoretical thickness of steel plate;
L1---辊缝自学习系数当前计算值；L 1 --- The current calculated value of the roll gap self-learning coefficient;
B1---平滑系数；B 1 --- smoothing coefficient;
根据辊缝自学习系数当前计算值L1计算辊缝值Gap，动态调整轧机辊缝，实现楔形LP钢板的轧制，Gap计算方法如下：Calculate the roll gap value Gap according to the current calculated value L1 of the roll gap self-learning coefficient, and dynamically adjust the roll gap of the rolling mill to realize the rolling of wedge-shaped LP steel plates. The Gap calculation method is as follows:
式中：Gap---辊缝设定计算值；In the formula: Gap---calculated value of roll gap setting;
Fh---板带出口厚度设定计算值；Fh --- The calculated value of the strip outlet thickness setting;
Gwid.lay1---宽度补偿增益；Gwid.lay1---width compensation gain;
WCX---宽度补偿；WCX---width compensation;
Goil.Lay1---油膜补偿增益；Goil.Lay1---oil film compensation gain;
M---轧机常数；M --- rolling mill constant;
S---有载辊缝；S---loaded roll gap;
S0---轧辊标定时的辊缝；S 0 --- roll gap during roll calibration;
F---油膜力；F---oil film force;
F0---标定时的油膜力；F 0 --- oil film force during calibration;
4)冷却工艺：冷却开始温度为1000～1050℃，返红温度为660～750℃；冷却速度为8～20℃/s。4) Cooling process: the cooling start temperature is 1000-1050°C, the redness temperature is 660-750°C; the cooling speed is 8-20°C/s.
所述补偿系数N用于对自学习数学模型进行修正，N的取值范围为：The compensation coefficient N is used to correct the self-learning mathematical model, and the value range of N is:
楔形LP钢板h1为10～80mm时，N为0.10～0.12；When h1 of wedge-shaped LP steel plate is 10-80mm, N is 0.10-0.12;
楔形LP钢板h1为81～130mm时，N为0.15～0.20；When h1 of wedge-shaped LP steel plate is 81-130mm, N is 0.15-0.20;
楔形LP钢板h1大于130mm时，N值为0.5。When the wedge-shaped LP steel plate h 1 is greater than 130mm, the N value is 0.5.
以下实施例在以本发明技术方案为前提下进行实施，给出了详细的实施方式和具体的操作过程，但本发明的保护范围不限于下述的实施例。下述实施例中所用方法如无特别说明均为常规方法。The following examples are carried out on the premise of the technical solutions of the present invention, and detailed implementation methods and specific operation processes are provided, but the protection scope of the present invention is not limited to the following examples. The methods used in the following examples are conventional methods unless otherwise specified.
【实施例1】【Example 1】
轧制钢种为Q420C的楔形LP钢板，楔形LP钢板成品厚度h1为135mm，h2为155mm，长度L为1500mm。具体轧制过程如下：The rolled steel type is Q420C wedge-shaped LP steel plate, the finished thickness h1 of wedge-shaped LP steel plate is 135mm, h2 is 155mm, and the length L is 1500mm. The specific rolling process is as follows:
钢坯加热温度为1210℃，且上表面温度比下表面温度高20℃，The billet heating temperature is 1210°C, and the upper surface temperature is 20°C higher than the lower surface temperature,
经过压力为15MPa的高压水除鳞；Descaling by high-pressure water with a pressure of 15MPa;
开轧温度为1180℃，终轧温度为1080℃，总压下率为30％，单道次压下率不小于10％，钢板轧制速度为5m/s；The starting rolling temperature is 1180°C, the final rolling temperature is 1080°C, the total reduction rate is 30%, the single pass reduction rate is not less than 10%, and the steel plate rolling speed is 5m/s;
补偿系数N取0.5；The compensation coefficient N is taken as 0.5;
冷却开始温度为1000℃，返红温度为750℃，冷却速度为10℃/s；The cooling start temperature is 1000°C, the redness temperature is 750°C, and the cooling rate is 10°C/s;
楔形LP钢板成品经检验，屈服强度为432Mpa，20℃冲击功为120J，符合检验标准要求，板形合格率为97.3％。After inspection, the finished wedge-shaped LP steel plate has a yield strength of 432Mpa and an impact energy of 120J at 20°C, which meets the requirements of the inspection standard, and the pass rate of the plate shape is 97.3%.
【实施例2】[Example 2]
轧制钢种为Q345C的楔形LP钢板，楔形LP钢板成品厚度h1为10mm，h2为65mm，长度L为8000mm。具体轧制过程如下：The rolled steel type is Q345C wedge-shaped LP steel plate, the finished thickness h1 of wedge-shaped LP steel plate is 10mm, h2 is 65mm, and the length L is 8000mm. The specific rolling process is as follows:
钢坯加热温度为1185℃，且上表面温度比下表面温度高20℃；The billet heating temperature is 1185°C, and the upper surface temperature is 20°C higher than the lower surface temperature;
经过压力为15MPa的高压水除鳞；Descaling by high-pressure water with a pressure of 15MPa;
开轧温度为1150℃，终轧温度为1020℃，总压下率为45％，单道次压下率不小于8％，钢板轧制速度为8m/s；The starting rolling temperature is 1150°C, the final rolling temperature is 1020°C, the total reduction rate is 45%, the single pass reduction rate is not less than 8%, and the steel plate rolling speed is 8m/s;
补偿系数N取0.11；The compensation coefficient N is taken as 0.11;
冷却开始温度为1000℃，返红温度为750℃，冷却速度为20℃/s；The cooling start temperature is 1000°C, the redness temperature is 750°C, and the cooling rate is 20°C/s;
楔形LP钢板成品经检验，屈服强度为405Mpa，-20℃冲击功为85J，符合检验标准要求，板形合格率为97.6％。After inspection, the finished wedge-shaped LP steel plate has a yield strength of 405Mpa and an impact energy of 85J at -20°C, which meets the requirements of the inspection standard, and the pass rate of the plate shape is 97.6%.
【实施例3】[Example 3]
轧制钢种为Q235C的楔形LP钢板，楔形钢板成品厚度h1为86mm，h2为128mm，长度L为2000mm。具体轧制过程如下：The rolled steel type is Q235C wedge-shaped LP steel plate, the finished thickness h1 of the wedge-shaped steel plate is 86mm, h2 is 128mm, and the length L is 2000mm. The specific rolling process is as follows:
钢坯加热温度为1210℃，且上表面温度比下表面温度高20℃；The billet heating temperature is 1210°C, and the upper surface temperature is 20°C higher than the lower surface temperature;
经过压力为15MPa的高压水除鳞；Descaling by high-pressure water with a pressure of 15MPa;
开轧温度为1160℃，终轧温度为1060℃，总压下率为45％，单道次压下率不小于8％，钢板轧制速度为4.5m/s；The starting rolling temperature is 1160°C, the final rolling temperature is 1060°C, the total reduction rate is 45%, the single pass reduction rate is not less than 8%, and the steel plate rolling speed is 4.5m/s;
补偿系数N取0.16；The compensation coefficient N is taken as 0.16;
冷却开始温度为1020℃，返红温度为680℃，冷却速度为10℃/s；The cooling start temperature is 1020°C, the redness temperature is 680°C, and the cooling rate is 10°C/s;
楔形LP钢板成品经检验，屈服强度为260Mpa，20℃冲击功为225J，符合检验标准要求，板形合格率为97.7％。After inspection, the finished wedge-shaped LP steel plate has a yield strength of 260Mpa and an impact energy of 225J at 20°C, which meets the requirements of the inspection standard, and the pass rate of the plate shape is 97.7%.
【实施例4】【Example 4】
轧制钢种为Q345D的楔形LP钢板，楔形LP钢板成品厚度h1为80mm，h2为126mm，长度L为3000mm。具体轧制过程如下：The rolled steel type is Q345D wedge-shaped LP steel plate, the finished thickness h1 of wedge-shaped LP steel plate is 80mm, h2 is 126mm, and the length L is 3000mm. The specific rolling process is as follows:
钢坯加热温度为1190℃，且上表面比下表面高20℃；The billet heating temperature is 1190°C, and the upper surface is 20°C higher than the lower surface;
经过压力为15MPa的高压水除鳞；Descaling by high-pressure water with a pressure of 15MPa;
开轧温度为1160℃，终轧温度为1055℃，总压下率为55％，单道次压下率不小于8％，钢板轧制速度为.4m/s；The rolling start temperature is 1160°C, the final rolling temperature is 1055°C, the total reduction rate is 55%, the single pass reduction rate is not less than 8%, and the steel plate rolling speed is .4m/s;
补偿系数N取0.18；The compensation coefficient N is taken as 0.18;
冷却开始温度为1030℃，返红温度为720℃，冷却速度为8℃/s；The cooling start temperature is 1030°C, the redness temperature is 720°C, and the cooling rate is 8°C/s;
楔形LP钢板成品经检验，屈服强度为412Mpa，0℃冲击功为135J，符合检验标准要求，板形合格率为98.2％。After inspection, the finished wedge-shaped LP steel plate has a yield strength of 412Mpa and an impact energy of 135J at 0°C, which meets the requirements of the inspection standard, and the pass rate of the plate shape is 98.2%.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technical solution of the present invention Any equivalent replacement or change of the inventive concepts thereof shall fall within the protection scope of the present invention.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397875A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Production method of longitudinal variable-thickness steel plate |
| CN102896156A (en) * | 2012-09-29 | 2013-01-30 | 鞍钢股份有限公司 | Optimization method of hot-rolled strip steel roll gap model |
| CN103506404A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Control method for roll gap in precision rolling process of strip steel |
-
2017
- 2017-02-08 CN CN201710068959.2A patent/CN108393359A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102397875A (en) * | 2010-09-16 | 2012-04-04 | 鞍钢股份有限公司 | Production method of longitudinal variable-thickness steel plate |
| CN103506404A (en) * | 2012-06-20 | 2014-01-15 | 鞍钢股份有限公司 | Control method for roll gap in precision rolling process of strip steel |
| CN102896156A (en) * | 2012-09-29 | 2013-01-30 | 鞍钢股份有限公司 | Optimization method of hot-rolled strip steel roll gap model |
Non-Patent Citations (1)
| Title |
|---|
| 费静等: "《热连轧精轧设定模型及其优化方法研究》", 《鞍钢技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110328232A (en) * | 2019-05-29 | 2019-10-15 | 邯郸钢铁集团有限责任公司 | A method of utilizing process control rolling wedge-shaped steel plate |
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