CN101462129B - Method for decreasing band steel residual stress on hot rolling leveling machine unit - Google Patents
Method for decreasing band steel residual stress on hot rolling leveling machine unit Download PDFInfo
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- CN101462129B CN101462129B CN2008102463271A CN200810246327A CN101462129B CN 101462129 B CN101462129 B CN 101462129B CN 2008102463271 A CN2008102463271 A CN 2008102463271A CN 200810246327 A CN200810246327 A CN 200810246327A CN 101462129 B CN101462129 B CN 101462129B
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- band steel
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- straightener
- residual stress
- strip steel
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Abstract
The invention relates to a method for reducing residual stress of strip steel, which is applied to a hot rolling leveling machine set. The invention provides a method for reducing the residual stress of the strip steel on the hot rolling leveling machine set. The method is characterized in that a straightening machine is adopted on the hot rolling leveling machine set to bend the strip steel; at the same time, tension opposite to the moving direction of the strip steel is applied to the back side of the straightening machine along the length direction of the strip steel, and the tension consistent to the moving direction of the strip steel is applied to the front side of the straightening machine along the length direction of the strip steel so as to ensure the deformation of the strip steel along the sheet length direction to converge. The method has the advantages of simplicity and good effect.
Description
Technical field
The present invention relates to a kind of method that reduces with residual stress of steel, be applied to the hot-rolled leveling unit.
Background technology
Traditionally, the process goal at the hot-rolled leveling unit is: improve the glacing flatness and the surface quality of hot-strip, improve the turriform of hot rolled coil, eliminate the thickness deviation of product within the specific limits; Residual stress problems to product can't be improved.
In course of hot rolling,, when its value acquires a certain degree, will cause the wooden dipper song and the shape wave of plate shape because inhomogeneous deformation makes the inner internal stress that produces of band steel.Because the existence of internal stress, coiled sheet is easy to generate waster at bending, plastic processing deformation, when deep processing such as cutting out.
Adopt the mode of the annealing aligning that stretches to reduce residual stress traditionally, and align bad plate shape.This mode is used in the production of the high deck of boat of precise electronic material, spring steel, high strength steel and welding requirements, but equipment investment is big, high this broad application that restricted of production cost.
As shown in Figure 1, adopt the mode of applying tension force for the band steel to make the band steel along the distortion advolution on the plate length direction, this method can improve the yield strength of product, reduces its punching performance.
Summary of the invention
The object of the present invention is to provide a kind of method that reduces on the hot-rolled leveling unit with residual stress of steel, this method is simple.
To achieve these goals, technical scheme of the present invention is: reduce the method with residual stress of steel on the hot-rolled leveling unit, it is characterized in that: on the hot-rolled leveling unit, adopt straightener that the band steel is carried out bending, simultaneously the rear side of straightener along apply on the band steel length direction with the opposite tension force of the steel direction of motion, in the front side of straightener along applying on the band steel length direction and, making the band steel along the distortion advolution on the plate length direction with the consistent tension force of the steel direction of motion.
The invention has the beneficial effects as follows: utilize mechanical means, adopt tension force to add crooked mode the band steel is reached unanimity along the deformation extent on the plate length direction, reach the target that reduces the product residual stress by the internal stress level that reduces the band steel, this method is simple; Method of the present invention adopts crooked, can not improve the yield strength of product, can not reduce its punching performance, and is of the present invention effective.
Description of drawings
Fig. 1 is the schematic diagram of one of method that reduces the internal stress of band steel;
Fig. 2 is a method schematic diagram of the present invention;
Fig. 3 is the structural representation of double formula straightener;
Fig. 4 is the structural representation of quadruple formula straightener;
Among the figure: 1-is with steel, 2-straightener.T1, T2 are tension force.
The specific embodiment
As shown in Figure 2, reduce the method with residual stress of steel on the hot-rolled leveling unit, adopt 2 pairs of bands of straightener steel 1 to carry out bending on the hot-rolled leveling unit, band steel sag is the 10-25 millimeter; Simultaneously the rear side of straightener along apply on the band steel length direction with the opposite tension force T1[unit tension 5-20MPa (cross-sectional area of power/band steel) of the steel direction of motion] (being with a side of the steel direction of motion is the front side, a side opposite with the band steel direction of motion is rear side), in the front side of straightener along apply on the band steel length direction and with the consistent tension force T2[unit tension 10-30MPa (cross-sectional area of power/band steel) of the steel direction of motion], make and be with steel along the distortion advolution on the plate length direction.
Straightener is double formula straightener or quadruple formula straightener.
Because the distance on the unit from the uncoiler to the coiling machine has determined the lumber recovery of unit, the mode of adding any elongation machine group length can be a cost to reduce lumber recovery all.Pinch straightener owing to all dispose a bench roller formula on the existing smooth unit, pinch aligning when being used to wear band and take the lead, adopt when wearing band the mode of operation that drops into, opens during unit operation; Also there is part producing factory when unit operation, to drop into and pinches straightener, in the hope of improving the glacing flatness of product.In order to reduce residual stress level under the prerequisite that does not reduce the unit lumber recovery, the present invention utilizes straightener to realize aligning the process function of taking the lead, improving the product glacing flatness, reduce the product residual stress level.
The product not high for intensity rank, that residual stress control is not tight adopts double formula straightener, as shown in Figure 3, reaches the purpose of elimination residual stress by the deformation extent of control band steel neutral surface.
For the strict product of residual stress level control, select quadruple formula straightener (as shown in Figure 4).The band steel is implemented to proofread and correct along the distortion on width and the length both direction is convergent, realize reducing the process goal of residual stress.
Claims (1)
1. reduce the method with residual stress of steel on the hot-rolled leveling unit, it is characterized in that: adopt straightener that the band steel is carried out bending on the hot-rolled leveling unit, band steel sag is the 10-25 millimeter; Simultaneously the rear side of straightener along apply on the band steel length direction with the opposite tension force of the steel direction of motion, in the front side of straightener along applying on the band steel length direction and, making the band steel along the distortion advolution on the plate length direction with the consistent tension force of the steel direction of motion; Described straightener is double formula straightener or quadruple formula straightener.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102463271A CN101462129B (en) | 2008-12-30 | 2008-12-30 | Method for decreasing band steel residual stress on hot rolling leveling machine unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102463271A CN101462129B (en) | 2008-12-30 | 2008-12-30 | Method for decreasing band steel residual stress on hot rolling leveling machine unit |
Publications (2)
| Publication Number | Publication Date |
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| CN101462129A CN101462129A (en) | 2009-06-24 |
| CN101462129B true CN101462129B (en) | 2011-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102463271A Active CN101462129B (en) | 2008-12-30 | 2008-12-30 | Method for decreasing band steel residual stress on hot rolling leveling machine unit |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626726B (en) * | 2012-04-13 | 2014-08-13 | 中冶南方工程技术有限公司 | Straightening and leveling process for hot-rolled high-strength steel |
| CN102672415A (en) * | 2012-05-03 | 2012-09-19 | 安徽工业大学 | Steel coil opening and leveling method for reducing warping of steel plate after cutting |
| CN102820098A (en) * | 2012-08-29 | 2012-12-12 | 江苏国能电力设备有限公司 | Enhancing unit for yield strength of copper wire |
| CN103506427B (en) * | 2013-09-17 | 2015-09-16 | 太原科技大学 | A kind of straightener eliminating residual stress in composite plate |
| CN106424157B (en) * | 2016-11-18 | 2018-09-18 | 首钢京唐钢铁联合有限责任公司 | A kind of control method and device for preventing planisher working roll from scratching |
| CN112605166B (en) * | 2020-11-20 | 2022-12-02 | 中冶南方工程技术有限公司 | Strip steel straightening method and device |
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| CN101462129A (en) | 2009-06-24 |
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