CN102816918A - Technique for preventing steel coils from bonding during annealing process - Google Patents
Technique for preventing steel coils from bonding during annealing process Download PDFInfo
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- CN102816918A CN102816918A CN2012103223002A CN201210322300A CN102816918A CN 102816918 A CN102816918 A CN 102816918A CN 2012103223002 A CN2012103223002 A CN 2012103223002A CN 201210322300 A CN201210322300 A CN 201210322300A CN 102816918 A CN102816918 A CN 102816918A
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 238000000137 annealing Methods 0.000 title claims abstract description 42
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 27
- 239000010959 steel Substances 0.000 title claims abstract description 27
- 238000005098 hot rolling Methods 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 238000009749 continuous casting Methods 0.000 claims abstract description 10
- 238000002791 soaking Methods 0.000 claims abstract description 7
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 6
- 239000010962 carbon steel Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000011572 manganese Substances 0.000 claims description 10
- 238000005097 cold rolling Methods 0.000 claims description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 6
- 239000005864 Sulphur Substances 0.000 claims description 6
- 239000002253 acid Substances 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052748 manganese Inorganic materials 0.000 claims description 6
- 229910052698 phosphorus Inorganic materials 0.000 claims description 6
- 239000011574 phosphorus Substances 0.000 claims description 6
- 229910052710 silicon Inorganic materials 0.000 claims description 6
- 239000010703 silicon Substances 0.000 claims description 6
- 238000010306 acid treatment Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005266 casting Methods 0.000 abstract 4
- 239000010960 cold rolled steel Substances 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 208000037656 Respiratory Sounds Diseases 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 238000007669 thermal treatment Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention provides a technique for preventing steel coils from bonding during an annealing process and belongs to the technical field of steel plate production and processing. The technique includes that carbon steel materials are smelted into molten steel which forms casting blanks after continuous casting and rolling, the casting blanks are processed into the steel coils through hot rolling, the thicknesses of the casting blanks after the continuous casting and rolling range from 40 to 100mm, the soaking temperature is controlled between 1110DEG C and 1180 DEG C when the casting blanks are processed into the steel coils, and the finished rolling temperature is controlled between 800DEG C and 900 DEG C when the hot rolling process is finished. According to the technique, the bonding proportion of the steel coils after the annealing process is reduced obviously, so that damage to the steel coils is avoided.
Description
Technical field
The invention belongs to steel plate process for processing technical field, more particularly, relate to a kind of coil of strip that prevents and bonding process method takes place in annealing process.
Background technology
The process of modern metallurgy industry production thin ribbon shaped material, be through thicker coils of hot-rolled steel is carried out pickling, cold rolling reduction process is handled, thereby obtain the product that thickness, high size all meet the demands.But, cold-rolled process has also caused the work hardening of coil of strip, mechanical property and poor processability, and the thermal treatment of need annealing obtains good over-all properties.But the coil of strip after the cold rolling work hardening is annealed after the thermal treatment, and bonding defect often takes place.Because the generation of bonding defect causes the cold-rolled steel coils degrading quality, serious meeting causes scrapping of coil of strip.In order to reduce the generation of cold-rolled steel coils annealing bonding defect; CN200510046495.2 proposes in the cold-rolled steel coils cover annealing, to improve the heated air temperature; Thereby form the outer ring and the big temperature difference of inner ring; Owing to improved thermal stresses, the position after bonding is separated, reduce the per-cent of the bonding generation of annealing product.Because this method gas temperature is near the austenitic temperature of carbon steel, under the small elegant condition of system, the coil of strip heating will make the carbon steel austenitizing, and after the cooling, a large amount of small grains will appear in coil of strip, and product mechanical property and use characteristics will worsen.In order to reduce the generation of cold-rolled steel sheet annealing bonding defect, CN200810047197.9 proposes at the bell-type table water-chilling plant to be set, and refrigerating unit is positioned at coil of strip inner ring Confucius.Finish in the annealing process insulation, water feeds in the pipe of refrigerating unit, and coil of strip is begun to cool down at first internally, because inner contraction, coil of strip interlayer natural separation reduces the generation of annealing bonding defect.But because the cooling tube of water-chilling plant is positioned at bell furnace inside, temperature will reach 700 ℃ in the heat-processed, begin to cool down water flowing with abnormally dangerous.Frequently carrying out of heating and cooling, cooling pipe generation crackle are inevitable, and crackle leaks and scraps causing the coil of strip oxidation.Therefore, prior art all can not reach the problem that sticking ratio takes place after effective reduction coil of strip cold-rolling treatment.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of and can reduce the coil of strip that prevents that bonding ratio takes place coil of strip in annealing process bonding process method takes place in the anneal process.
Solve above-described technical problem, the technical scheme that the present invention takes is:
Bonding process method takes place for a kind of coil of strip that prevents in annealing process in the present invention; Earlier carbon steel material is smelted into molten steel, molten steel forms strand after continuous casting and rolling, and strand is handled through the heating hot rolling and formed coil of strip; Described through the slab thickness that forms after the continuous casting and rolling between 40-100mm; Strand heats hot rolling to be handled when forming coil of strip, and soaking temperature is controlled between 1110-1180 ℃, and the finishing temperature when described heating hot rolling processing finishes is controlled between 800-900 ℃.
The proportion of described each composition of molten steel is respectively (wt%): carbon (C)≤0.09%, manganese (Mn)＜0.35%, silicon (Si)≤0.12%, phosphorus (P)≤0.04%, the molten aluminium (Als)≤0.07% of sulphur (S)≤0.012%, 0.015%≤acid, surplus is iron (Fe).
The coiling temperature of the strand when described heating hot rolling is handled is controlled between 550-700 ℃.
Coil of strip after described heating hot rolling is handled carries out cleanup acid treatment, cold-rolling treatment, anneal successively; When described coil of strip carries out anneal; The heated air temperature is controlled between 650-700 ℃; Annealing temperature is controlled between 580-660 ℃, and the annealing temperature soaking time is 1-6h, and described coil of strip carries out anneal in the perhydro bell furnace.
The preferred specific gravity of described each composition of molten steel is respectively (wt%): carbon (C)≤0.07%, 0.08%≤manganese (Mn)≤0.30%, silicon (Si)≤0.10%, phosphorus (P)≤0.03%, the molten aluminium (Als)≤0.05% of sulphur (S)≤0.010%, 0.020%≤acid, surplus is iron (Fe).
When described coil of strip carried out anneal, the heated air temperature preferably was controlled between 660-690 ℃, and annealing temperature is controlled between 590-630 ℃.
Finishing temperature when described heating hot rolling processing finishes is controlled between 850-880 ℃.
Adopt technical scheme of the present invention, can obtain following beneficial effect:
Bonding process method takes place in annealing process in the coil of strip that prevents of the present invention; Through the molten steel of chemical ingredients carries out the continuous casting and rolling processing to comprising as stated; Form strand; Handle to form coil of strip through the heating hot rolling again, coil of strip carries out cyclic annealing through overpickling, after cold rolling in the perhydro bell furnace.During anneal; The heated air temperature preferably is controlled at 660～690 ℃; Annealing temperature preferably is controlled at 590-630 ℃, and through the coil of strip that said process method processes, bonding ratio takes place after anneal coil of strip obviously reduces; Thereby avoided infringement, improved the total quality of the steel plate that is processed into coil of strip coil of strip itself.
Description of drawings
The mark of facing down among expressed content of each accompanying drawing of this specification sheets and the figure is made briefly bright:
Fig. 1 is the composition synoptic diagram of the molten steel of processing coil of strip of the present invention;
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are done further to specify:
Shown in accompanying drawing 1; Bonding process method takes place for a kind of coil of strip that prevents in annealing process in the present invention; Earlier carbon steel material is smelted into molten steel, molten steel forms strand after continuous casting and rolling, and strand is handled through the heating hot rolling and formed coil of strip; Described through the slab thickness that forms after the continuous casting and rolling between 40-100mm; Strand heats hot rolling to be handled when forming coil of strip, and soaking temperature is controlled between 1110-1180 ℃, and the finishing temperature when described heating hot rolling processing finishes is controlled between 800-900 ℃.
The proportion of described each composition of molten steel is respectively (wt%): carbon (C)≤0.09%, manganese (Mn)＜0.35%, silicon (Si)≤0.12%, phosphorus (P)≤0.04%, the molten aluminium (Als)≤0.07% of sulphur (S)≤0.012%, 0.015%≤acid, surplus is iron (Fe).
The coiling temperature of the strand when described heating hot rolling is handled is controlled between 550-700 ℃.
Coil of strip after described heating hot rolling is handled carries out cleanup acid treatment, cold-rolling treatment, anneal successively; When described coil of strip carries out anneal; The heated air temperature is controlled between 650-700 ℃; Annealing temperature is controlled between 580-660 ℃, and the annealing temperature soaking time is 1-6h, and described coil of strip carries out anneal in the perhydro bell furnace.
The preferred specific gravity of described each composition of molten steel is respectively (wt%): carbon (C)≤0.07%, 0.08%≤manganese (Mn)≤0.30%, silicon (Si)≤0.10%, phosphorus (P)≤0.03%, the molten aluminium (Als)≤0.05% of sulphur (S)≤0.010%, 0.020%≤acid, surplus is iron (Fe).
When described coil of strip carried out anneal, the heated air temperature preferably was controlled between 660-690 ℃, and annealing temperature is controlled between 590-630 ℃.
Finishing temperature when described heating hot rolling processing finishes is controlled between 850-880 ℃.
In process method of the present invention, when the perhydro cover annealing is handled, reduce the heated air temperature, any position of cold-rolled steel coils when bell furnace heats can be heated the temperature that reaches and reduce.Therefore, the thermal stresses that cold-rolled steel coils receives in annealing process descends, and local temperature reduces; Under same annealing conditions, the condition variation of diffusion welding takes place, that is: the ability drop of cold-rolled steel coils generation local diffusion welding; It is bonding few that annealing just takes place; The annealing bonding defect tails off, thereby reaches coil of strip after cold-rolling treatment, and the purpose that bonding ratio obviously reduces takes place.
Bonding process method takes place in annealing process in the coil of strip that prevents of the present invention; Through the molten steel of chemical ingredients carries out the continuous casting and rolling processing to comprising as stated; Form strand; Handle to form coil of strip through the heating hot rolling again, coil of strip carries out cyclic annealing through overpickling, after cold rolling in the perhydro bell furnace.During anneal; The heated air temperature preferably is controlled at 660～690 ℃; Annealing temperature preferably is controlled at 590-630 ℃, and through the coil of strip of said method processing, bonding ratio takes place after anneal coil of strip obviously reduces; Thereby avoided infringement, improved the total quality of the steel plate that is processed into coil of strip coil of strip itself.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or design of the present invention and technical scheme are directly applied to other occasions without improving, all in protection scope of the present invention.
Claims (7)
1. one kind prevents that coil of strip from annealing process bonding process method taking place; Earlier carbon steel material is smelted into molten steel, molten steel forms strand after continuous casting and rolling, and strand is handled through the heating hot rolling and formed coil of strip; It is characterized in that: described through the slab thickness that forms after the continuous casting and rolling between 40-100mm; Strand heats hot rolling to be handled when forming coil of strip, and soaking temperature is controlled between 1110-1180 ℃, and the finishing temperature when described heating hot rolling processing finishes is controlled between 800-900 ℃.
2. bonding process method takes place in annealing process in the coil of strip that prevents according to claim 1; It is characterized in that: the proportion of described each composition of molten steel is respectively (wt%): carbon≤0.09%, manganese＜0.35%, silicon≤0.12%, phosphorus≤0.04%, the molten aluminium of sulphur≤0.012%, 0.015%≤acid≤0.07%, surplus is an iron.
3. bonding process method takes place in annealing process in the coil of strip that prevents according to claim 2, and it is characterized in that: the coiling temperature of the strand when described heating hot rolling is handled is controlled between 550-700 ℃.
4. in annealing process bonding process method takes place according to claim 1 or the 2 or 3 described coil of strips that prevent; It is characterized in that: the coil of strip after described heating hot rolling is handled carries out cleanup acid treatment, cold-rolling treatment, anneal successively; When described coil of strip carried out anneal, the heated air temperature was controlled between 650-700 ℃, and annealing temperature is controlled between 580-660 ℃; The annealing temperature soaking time is 1-6h, and described coil of strip carries out anneal in the perhydro bell furnace.
5. bonding process method takes place in annealing process in the coil of strip that prevents according to claim 4; It is characterized in that: the preferred specific gravity of said each composition of molten steel is respectively (wt%): carbon≤0.07%, 0.08%≤manganese≤0.30%, silicon≤0.10%, phosphorus≤0.03%, the molten aluminium of sulphur≤0.010%, 0.020%≤acid≤0.05%, surplus is an iron.
6. bonding process method takes place in annealing process in the coil of strip that prevents according to claim 5; It is characterized in that: when described coil of strip carries out anneal; The heated air temperature preferably is controlled between 660-690 ℃, and annealing temperature is controlled between 590-630 ℃.
7. bonding process method takes place in annealing process in the coil of strip that prevents according to claim 6, and it is characterized in that: the finishing temperature when described heating hot rolling processing finishes is controlled between 850-880 ℃.
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| CN2012103223002A CN102816918A (en) | 2012-09-04 | 2012-09-04 | Technique for preventing steel coils from bonding during annealing process |
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| CN2012103223002A CN102816918A (en) | 2012-09-04 | 2012-09-04 | Technique for preventing steel coils from bonding during annealing process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071982A (en) * | 2013-01-31 | 2013-05-01 | 西南铝业（集团）有限责任公司 | Aluminum coil processing technic |
| CN108642377A (en) * | 2018-05-02 | 2018-10-12 | 山西太钢不锈钢股份有限公司 | The method being bonded after preventing Thin Specs austenite antimicrobial stainless steel cold rolling coil from annealing |
| CN112226597A (en) * | 2020-10-16 | 2021-01-15 | 四川汇源钢建科技股份有限公司 | Cold rolling annealing method for cold-rolled strip steel |
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| JPH0474821A (en) * | 1990-07-12 | 1992-03-10 | Sumitomo Metal Ind Ltd | How to prevent seizure during tight annealing |
| JPH05287390A (en) * | 1992-04-08 | 1993-11-02 | Sumitomo Metal Ind Ltd | Annealing method for cold rolled steel strip coil |
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| CN102581008A (en) * | 2012-03-01 | 2012-07-18 | 河北钢铁股份有限公司唐山分公司 | Processing method for producing low-cost high-formability IF (interstitial-free) steel |
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2012
- 2012-09-04 CN CN2012103223002A patent/CN102816918A/en active Pending
Patent Citations (6)
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| JPH0474821A (en) * | 1990-07-12 | 1992-03-10 | Sumitomo Metal Ind Ltd | How to prevent seizure during tight annealing |
| JPH05287390A (en) * | 1992-04-08 | 1993-11-02 | Sumitomo Metal Ind Ltd | Annealing method for cold rolled steel strip coil |
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Non-Patent Citations (1)
| Title |
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| 张选峰等: "冷轧板退火过程中的相关问题及解决", 《2009年河北省轧钢技术与学术年会论文集（下）》, 31 December 2009 (2009-12-31) * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103071982A (en) * | 2013-01-31 | 2013-05-01 | 西南铝业（集团）有限责任公司 | Aluminum coil processing technic |
| CN103071982B (en) * | 2013-01-31 | 2015-04-29 | 西南铝业（集团）有限责任公司 | Aluminum coil processing technique |
| CN108642377A (en) * | 2018-05-02 | 2018-10-12 | 山西太钢不锈钢股份有限公司 | The method being bonded after preventing Thin Specs austenite antimicrobial stainless steel cold rolling coil from annealing |
| CN112226597A (en) * | 2020-10-16 | 2021-01-15 | 四川汇源钢建科技股份有限公司 | Cold rolling annealing method for cold-rolled strip steel |
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Application publication date: 20121212 |