CN114410898A - Control method for cold buckling of ultra-deep drawing wide-width plate - Google Patents
Control method for cold buckling of ultra-deep drawing wide-width plate Download PDFInfo
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- CN114410898A CN114410898A CN202210086167.9A CN202210086167A CN114410898A CN 114410898 A CN114410898 A CN 114410898A CN 202210086167 A CN202210086167 A CN 202210086167A CN 114410898 A CN114410898 A CN 114410898A
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- cooling section
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- target coil
- cooling
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000000137 annealing Methods 0.000 claims abstract description 15
- 230000032683 aging Effects 0.000 claims abstract description 12
- 238000010583 slow cooling Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/74—Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Abstract
The invention discloses a method for controlling the cold buckling of an ultra-deep drawing wide-width plate, which uses 6 CQ-grade steel coils with the width larger than that of a target coil, and controls the CQ-grade steel coils according to the annealing temperature and the annealing speed of the target coil so as to stabilize the roller shape and the temperature of a furnace roller; 2 DQ-grade steel coils with the width larger than that of the target coil are used, and the control is carried out according to the tension of the target coil, so that the whole tension state is in a stable state; the CQ, DQ levels and the temperature settings of the target coil are as follows: the outlet of the slow cooling section is 630 ℃, the outlet of the fast cooling section is 370 ℃, and the aging section is naturally cooled; the CQ, DQ levels and target steel coil cooling rate are set as follows: the slow cooling section has a cooling speed of 11 ℃/S, the fast cooling section has a cooling speed of 28 ℃/S, and the aging section is naturally cooled; speed setting: setting according to the length of each cooling section of different annealing furnaces; setting tension: heating section 4.5KN, slow cooling section 6KN, fast cooling section 7KN, ageing section 5.5 KN.
Description
Technical Field
The invention belongs to the technical field of cold rolling, and particularly relates to a control method for cold buckling of an ultra-deep drawing wide plate.
Background
When continuous annealing ultra-deep punching broad width board production, the coil of strip is heated 850 degrees board temperature in the heating section, get into slowly cooling after the cooling and be cooled down to 660 degrees, at fast cooling and ageing section cooled down 370 degrees in succession, at this in-process, belted steel is cooled down rapidly, because there is the difference in temperature on stove roller and belted steel surface, the stove roller has certain convexity, bellows refrigerated homogeneity problem, all can cause belted steel stress release's inhomogeneous, cause belted steel class rib portion to form the splayed cold buckling, form slight feeling twill defect after the levelling machine rolling, can't satisfy customer demand, when serious, the buckling can directly cause belted steel at the stove off tracking.
When the ultra-deep drawing wide-width plate is subjected to cold buckling, the strength of the strip steel entering a cold section is improved by reducing the annealing temperature of a soaking section, so that the buckling resistance is increased, or the structure is changed by adding alloy elements, but the cold buckling cannot be completely eliminated by the measures, the yield strength of the strip steel is increased, and the stamping requirement of a terminal cannot be met; under the condition of serious buckling, the belt can even be deflected and broken in the furnace, and the machine can only be stopped for 3 to 4 days for treatment.
In summary, the buckling problem of the ultra-deep drawing wide plate not only causes unqualified product quality, but also seriously affects the production efficiency and production stability of the continuous annealing unit.
Disclosure of Invention
The invention aims to provide a control method for the cold buckling of an ultra-deep drawing wide-width plate.
The technical scheme adopted by the invention for solving the technical problems is as follows: a control method for the cold buckling of an ultra-deep drawing wide-width plate comprises the following steps:
1) using 6 CQ-grade steel coils with the width larger than that of the target coil, and controlling according to the annealing temperature and the annealing speed of the target coil to stabilize the roller shape and the temperature of the furnace roller;
2) 2 DQ-grade steel coils with the width larger than that of the target coil are used, and the control is carried out according to the tension of the target coil, so that the whole tension state is in a stable state;
the CQ, DQ levels and the temperature settings of the target coil are as follows: the outlet of the slow cooling section is 630 ℃, the outlet of the fast cooling section is 370 ℃, and the aging section is naturally cooled;
the CQ, DQ levels and target steel coil cooling rate are set as follows: the slow cooling section has a cooling speed of 11 ℃/S, the fast cooling section has a cooling speed of 28 ℃/S, and the aging section is naturally cooled;
speed setting: setting according to the length of each cooling section of different annealing furnaces;
setting tension: heating section 4.5KN, slow cooling section 6KN, fast cooling section 7KN, ageing section 5.5 KN.
The invention has the following beneficial effects: 1) the cold buckling generation of the ultra-deep drawing wide-width plate is controlled; 2) the deflection shutdown caused by the buckling is avoided; 3) the control is simple, alloy elements and the like do not need to be added, and the cold buckling control can be finished without extra cost investment; 4) the method has clear and easily-realized control logic and strong applicability, and can be popularized and applied to continuous annealing, galvanizing units and the like.
Detailed Description
The present invention will now be described in further detail.
A control method for the cold buckling of an ultra-deep drawing wide-width plate comprises the following steps:
during the production of the ultra-deep drawing wide-width plate, the furnace roller shape, the furnace roller temperature, the cooling rate and the tension of the cooling section are controlled and set according to specified values.
When 6 volumes of CQ-grade transition materials before the ultra-deep drawing of the wide plate are produced, the speed is set to 150mpm, the annealing temperature is set to 630 ℃ in the slow cooling section and 370 ℃ in the fast cooling section, and meanwhile, a fan in the aging section is closed, so that the natural cooling effect is achieved. When 2 coils of DQ-grade steel coils are produced, the tension of a heating section is gradually set to 4.5KN, the tension of a slow cooling section is set to 6KN, the tension of a fast cooling section is set to 7KN, and the tension of an aging section is set to 5.5 KN. Meanwhile, the hydrogen concentration of the rapid cooling section is set to be 20%, and the condition that the swing amplitude of the strip steel in the furnace is too large due to too high power of a fan is avoided. The cold buckling disappeared under the control of this annealing curve.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (1)
1. A control method for the cold buckling of an ultra-deep drawing wide-width plate is characterized by comprising the following steps:
1) using 6 CQ-grade steel coils with the width larger than that of the target coil, and controlling according to the annealing temperature and the annealing speed of the target coil to stabilize the roller shape and the temperature of the furnace roller;
2) 2 DQ-grade steel coils with the width larger than that of the target coil are used, and the control is carried out according to the tension of the target coil, so that the whole tension state is in a stable state;
the CQ, DQ levels and the temperature settings of the target coil are as follows: the outlet of the slow cooling section is 630 ℃, the outlet of the fast cooling section is 370 ℃, and the aging section is naturally cooled;
the CQ, DQ levels and target steel coil cooling rate are set as follows: the slow cooling section has a cooling speed of 11 ℃/S, the fast cooling section has a cooling speed of 28 ℃/S, and the aging section is naturally cooled;
speed setting: setting according to the length of each cooling section of different annealing furnaces;
setting tension: heating section 4.5KN, slow cooling section 6KN, fast cooling section 7KN, ageing section 5.5 KN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210086167.9A CN114410898A (en) | 2022-01-25 | 2022-01-25 | Control method for cold buckling of ultra-deep drawing wide-width plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210086167.9A CN114410898A (en) | 2022-01-25 | 2022-01-25 | Control method for cold buckling of ultra-deep drawing wide-width plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114410898A true CN114410898A (en) | 2022-04-29 |
Family
ID=81276744
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210086167.9A Pending CN114410898A (en) | 2022-01-25 | 2022-01-25 | Control method for cold buckling of ultra-deep drawing wide-width plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114410898A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2201461C1 (en) * | 2002-04-16 | 2003-03-27 | Урцев Владимир Николаевич | Line for cooling coiled strip after annealing |
| JP2009174019A (en) * | 2008-01-25 | 2009-08-06 | Nippon Steel Corp | Low-yield-ratio-type high-strength cold rolled steel sheet with excellent bake hardening characteristic and delayed natural aging characteristic, and its manufacturing method |
| CN102719742A (en) * | 2012-06-18 | 2012-10-10 | 首钢总公司 | Limit-specification IF steel and furnace zone through plate method thereof |
| CN103014500A (en) * | 2012-12-26 | 2013-04-03 | 首钢总公司 | Ultrawide SEDDQ deep-drawing automobile sheet and production method thereof |
| CN103255277A (en) * | 2013-04-28 | 2013-08-21 | 首钢京唐钢铁联合有限责任公司 | Method for producing wide and thin IF steel by continuous annealing |
| CN104372164A (en) * | 2013-08-13 | 2015-02-25 | 上海梅山钢铁股份有限公司 | Production method capable of controlling buckling of thin broad soft zinc-coated strip steel during cooling process |
| CN111850286A (en) * | 2020-06-15 | 2020-10-30 | 华菱安赛乐米塔尔汽车板有限公司 | Application method for preventing ultra-wide IF steel from being buckled by cold |
-
2022
- 2022-01-25 CN CN202210086167.9A patent/CN114410898A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2201461C1 (en) * | 2002-04-16 | 2003-03-27 | Урцев Владимир Николаевич | Line for cooling coiled strip after annealing |
| JP2009174019A (en) * | 2008-01-25 | 2009-08-06 | Nippon Steel Corp | Low-yield-ratio-type high-strength cold rolled steel sheet with excellent bake hardening characteristic and delayed natural aging characteristic, and its manufacturing method |
| CN102719742A (en) * | 2012-06-18 | 2012-10-10 | 首钢总公司 | Limit-specification IF steel and furnace zone through plate method thereof |
| CN103014500A (en) * | 2012-12-26 | 2013-04-03 | 首钢总公司 | Ultrawide SEDDQ deep-drawing automobile sheet and production method thereof |
| CN103255277A (en) * | 2013-04-28 | 2013-08-21 | 首钢京唐钢铁联合有限责任公司 | Method for producing wide and thin IF steel by continuous annealing |
| CN104372164A (en) * | 2013-08-13 | 2015-02-25 | 上海梅山钢铁股份有限公司 | Production method capable of controlling buckling of thin broad soft zinc-coated strip steel during cooling process |
| CN111850286A (en) * | 2020-06-15 | 2020-10-30 | 华菱安赛乐米塔尔汽车板有限公司 | Application method for preventing ultra-wide IF steel from being buckled by cold |
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