CN102125947A - Method for flattening super-thick steel plates with temperature - Google Patents
Method for flattening super-thick steel plates with temperature Download PDFInfo
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- CN102125947A CN102125947A CN2010105976680A CN201010597668A CN102125947A CN 102125947 A CN102125947 A CN 102125947A CN 2010105976680 A CN2010105976680 A CN 2010105976680A CN 201010597668 A CN201010597668 A CN 201010597668A CN 102125947 A CN102125947 A CN 102125947A
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Abstract
The invention discloses a method for flattening super-thick steel plates with temperature. In the method, medium temperature tempering for the super-thick steel plates eliminates the internal stress of the steel plates, the yield strength and tensile strength of the steel plates cannot be reduced, and the impact toughness and the elongation of the steel plates are improved to some extent; and the time for hoisting the discharged steel plates to a flatting machine is strictly controlled to be less than or equal to 10 minutes, and the flattening temperature of the steel plates is ensured, so that the flattening effect of the steel plates with temperature is ensured. In the method, steel plate residual temperature after the super-thick steel plates are normalized is utilized for flattening, and the flattening temperature is 300 to 500DEG C; steel plate stack cold and destacking residual temperature is utilized to flatten No.45 steel plates, and the flattening temperature is 200 to 400DEG C; and for cooled steel plates, the annealing temperature is 400+/-10DEG C and the holding time is 1.6min/mm. The method has the advantages that: the flatness of the super-thick steel plates is improved, and the cost is greatly reduced by low-pressure flattening compared with that of high-pressure flattening; moreover, the steel plate normalizing residual temperature or stack cold residual temperature is utilized for flattening, a steel plate tempering procedure is reduced, and the production flow is shortened.
Description
Technical field
The invention belongs to technical field of steel rolling, relate to thickness, be specifically related to the flat method of a kind of super-thick steel plate band temperature and pressure greater than the above super-thick steel plate production method of 200mm.
Background technology
The second half year in 2008, because the influence of world's financial crisis, China is in order to guarantee socioeconomic steady development, and government has strengthened the investment in fixed assets dynamics to every field, has expedited the emergence of the demand of market to the above super-thick steel plate of 200mm.
At present, the above guaranteed cost super-thick steel plate of known 200mm is steel ingot or the above 45# steel of 150mm that adopts die casting process to produce, and thickness surpasses 150mm and can't use thermal straightening machine to align with upper steel plate, must use big pressure press to flatten, and has cost height, flow process defective how.
Summary of the invention
In line with the theory that reduces super-thick steel plate production cost, less production procedure, solution production bottleneck, the band temperature and pressure quadratic method condition of production is followed the tracks of, be optimized technology at flattening effect, invented the flat method of a kind of super-thick steel plate band temperature and pressure.For this reason, the invention provides the flat method of a kind of super-thick steel plate band temperature and pressure, this method can solve the problem that little pressure press (3000T is following) can't flatten super-thick steel plate, high-strength steel sheet, have the advantages that to fall cost, subtract flow process, cooperate proper heat treatment technology, make requirements such as its every machinery that can guarantee steel plate, processing performance, can simplify production technology again, shorten production procedure, reduce energy consumption, be fit to big production operation.
For achieving the above object, the present invention is by the average tempering to super-thick steel plate, and average tempering is eliminated the steel plate internal stress, and steel plate yield strength, tensile strength can not descend, to impact flexibility, the percentage elongation effect of haveing a certain upgrade of steel plate; Strict control steel plate is come out of the stove the back handling to press time≤10min, guarantees the roller flatteningl roller levelling temperature, thereby guarantees the flat effect of steel plate band temperature and pressure.
In the preceding method, utilize the super-thick steel plate normalizing after the surplus temperature of steel plate flatten, flattening temperature is 300 to 500 ℃, the 45# steel plate utilizes the surplus temperature of steel plate cooling in heap de-stacking to flatten, and flattening temperature is 200 to 400 ℃, to cooling metal sheets, temperature is 400 ± 10 ℃, and temperature retention time is 1.6min/mm.
Beneficial effect of the present invention is: the flatness that improves super-thick steel plate, using low-pressure to flatten (3000 tons) compares with high pressure (more than 5000 tons), reduced cost greatly, and utilize surplus temperature of steel plate normalizing or the surplus temperature of cooling in heap to flatten, reduce the steel plate tempering process, shortened production procedure.
The specific embodiment
The present invention adopts whole technological process to be: normalizing (cooling in heap, tempering), pressing, check, delivery.
The present invention is by the average tempering to super-thick steel plate, and average tempering is eliminated the steel plate internal stress, and steel plate yield strength, tensile strength can not descend, to impact flexibility, the percentage elongation effect of haveing a certain upgrade of steel plate; Strict control steel plate is come out of the stove the back handling to press time≤10min, guarantees the roller flatteningl roller levelling temperature, thereby guarantees the flat effect of steel plate band temperature and pressure.
In the preceding method, utilize the super-thick steel plate normalizing after the surplus temperature of steel plate flatten, flattening temperature is 300 to 500 ℃, the 45# steel plate utilizes the surplus temperature of steel plate cooling in heap de-stacking to flatten, and flattening temperature is 200 to 400 ℃, to cooling metal sheets, temperature is 400 ± 10 ℃, and temperature retention time is 1.6min/mm.
The steel plate normalizing process: the steel plate normalizing process is carried out according to my company's control technological standards.
The steel plate tempering process: temperature is 400 ± 10 ℃, and temperature retention time is 1.6min/mm.
Steel plate cooling in heap technology: I company's control technological standards carry out steel plate cooling in heap technology.
Steel plate according to the tempering of technological requirement of the present invention institute is carried out Performance Detection, do according to national standard and impact check, tensile testing.Assay sees Table 1.
Result of the test shows, the steel plate of this invented technology tempering, and yield strength, tensile strength do not descend after the steel plate tempering, and impact flexibility, percentage elongation are improved to some extent.
Technology of the present invention has overcome traditional super-thick steel plate must use big pressure press, shortcoming that cost is high, avoids 45# steel plate fragility big, and normal temperature flattens the defective of pressure break, can the stable super-thick steel plate of production performance.This invented technology composition is less demanding, technological operation is simple, and production procedure is short, energy consumption is low, is convenient to promote in big production.
Table 1 backfire test result:
Annotate: ballistic work is a mean value.
Claims (3)
1. the flat method of super-thick steel plate band temperature and pressure is characterized in that this method comprises by the average tempering step to super-thick steel plate.
2. according to the flat method of the described super-thick steel plate band of claim 1 temperature and pressure, it is characterized in that steel plate comes out of the stove the back handling to press time≤10min.
3. according to the flat method of the described super-thick steel plate band of claim 2 temperature and pressure, it is characterized in that utilizing the super-thick steel plate normalizing after the surplus temperature of steel plate flatten, flattening temperature is 300 to 500 ℃; The 45# steel plate utilizes the surplus temperature of steel plate cooling in heap de-stacking to flatten, and flattening temperature is 200 to 400 ℃; To cooling metal sheets, temperature is 400 ± 10 ℃, and temperature retention time is 1.6min/mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010597668 CN102125947B (en) | 2010-12-21 | 2010-12-21 | Method for flattening super-thick steel plates with temperature |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010597668 CN102125947B (en) | 2010-12-21 | 2010-12-21 | Method for flattening super-thick steel plates with temperature |
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| CN102125947A true CN102125947A (en) | 2011-07-20 |
| CN102125947B CN102125947B (en) | 2013-05-22 |
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| CN 201010597668 Active CN102125947B (en) | 2010-12-21 | 2010-12-21 | Method for flattening super-thick steel plates with temperature |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937946A (en) * | 2014-01-21 | 2014-07-23 | 河北钢铁股份有限公司唐山分公司 | Low-temperature tempering method of seawater corrosion resistant steel 10CrMoAl |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005187853A (en) * | 2003-12-24 | 2005-07-14 | Jfe Steel Kk | Method for producing high strength thick steel plate excellent in toughness in extra-high heat input welded-heat affected part |
| CN101613828A (en) * | 2009-07-16 | 2009-12-30 | 首钢总公司 | Super-thick steel plate for low yield ratio buildings with 460 MPa grade yield strength and manufacture method |
| CN101709425A (en) * | 2009-12-26 | 2010-05-19 | 舞阳钢铁有限责任公司 | High-strength steel plate for super-thick 80,000-ton large-scale forging press brackets, and production method thereof |
| CN101713054A (en) * | 2009-12-28 | 2010-05-26 | 舞阳钢铁有限责任公司 | Large thickness steel plate for hydrogenation reaction chamber reeling equipment and production method thereof |
| CN101876001A (en) * | 2009-11-25 | 2010-11-03 | 首钢总公司 | Method for improving low-temperature impact toughness of high strength thick steel plate |
| CN101451184B (en) * | 2007-12-06 | 2010-11-17 | 舞阳钢铁有限责任公司 | Low-temperature prewarming and flattening method of normalizing furnace |
-
2010
- 2010-12-21 CN CN 201010597668 patent/CN102125947B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005187853A (en) * | 2003-12-24 | 2005-07-14 | Jfe Steel Kk | Method for producing high strength thick steel plate excellent in toughness in extra-high heat input welded-heat affected part |
| CN101451184B (en) * | 2007-12-06 | 2010-11-17 | 舞阳钢铁有限责任公司 | Low-temperature prewarming and flattening method of normalizing furnace |
| CN101613828A (en) * | 2009-07-16 | 2009-12-30 | 首钢总公司 | Super-thick steel plate for low yield ratio buildings with 460 MPa grade yield strength and manufacture method |
| CN101876001A (en) * | 2009-11-25 | 2010-11-03 | 首钢总公司 | Method for improving low-temperature impact toughness of high strength thick steel plate |
| CN101709425A (en) * | 2009-12-26 | 2010-05-19 | 舞阳钢铁有限责任公司 | High-strength steel plate for super-thick 80,000-ton large-scale forging press brackets, and production method thereof |
| CN101713054A (en) * | 2009-12-28 | 2010-05-26 | 舞阳钢铁有限责任公司 | Large thickness steel plate for hydrogenation reaction chamber reeling equipment and production method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103937946A (en) * | 2014-01-21 | 2014-07-23 | 河北钢铁股份有限公司唐山分公司 | Low-temperature tempering method of seawater corrosion resistant steel 10CrMoAl |
| CN103937946B (en) * | 2014-01-21 | 2015-08-05 | 河北钢铁股份有限公司唐山分公司 | A kind of low-temperaturetempering method of Seawate-corrosive-resisting steel 10CrMoAl |
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| CN102125947B (en) | 2013-05-22 |
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