CN107185991A - The processing method of think gauge cold rolling levelling coil of strip faulty goods - Google Patents
The processing method of think gauge cold rolling levelling coil of strip faulty goods Download PDFInfo
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- CN107185991A CN107185991A CN201710297026.0A CN201710297026A CN107185991A CN 107185991 A CN107185991 A CN 107185991A CN 201710297026 A CN201710297026 A CN 201710297026A CN 107185991 A CN107185991 A CN 107185991A
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- coil
- strip
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/02—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of sheets
-
- 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
- C21D9/54—Furnaces for treating strips or wire
- C21D9/663—Bell-type furnaces
- C21D9/667—Multi-station furnaces
- C21D9/67—Multi-station furnaces adapted for treating the charge in vacuum or special atmosphere
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/14—Cleaning or pickling metallic material with solutions or molten salts with alkaline solutions
- C23G1/19—Iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
- C25F1/02—Pickling; Descaling
- C25F1/04—Pickling; Descaling in solution
- C25F1/06—Iron or steel
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a kind of processing method of think gauge cold rolling levelling coil of strip faulty goods, it is the defect type according to think gauge cold rolling levelling coil of strip, handled according to corresponding method, after handling the method that faulty goods is provided according to the present invention, it is possible to use the existing equipment of rolling mill production line as much as possible improves the qualification rate of cold-rolled products.
Description
Technical field
The present invention relates to technical field of steel production, more particularly to a kind of think gauge cold rolling levelling coil of strip faulty goods
Processing method.
Background technology
In current thin plate production process, flat cold-rolled sheet Surface Quality, punch forming performance requirement it is all very tight
Lattice.In general, the surface quality of cold-rolled products be divided into general surface quality by case of surface defects, compared with fine surface quality and
Three ranks of fine surface quality.In addition, some cold-rolled steel coils for not meeting minimum surface quality standard are judged as degradation product.
Substantial amounts of faulty goods directly affects the profit of enterprise.
The content of the invention
In order to solve the above technical problems, the present invention provides a kind of processing side of think gauge cold rolling levelling coil of strip faulty goods
Method.
The present invention provides a kind of processing method of think gauge cold rolling levelling coil of strip faulty goods, and it is cold rolling according to think gauge
The defect type of smooth coil of strip, is handled according to following corresponding method：
Situation a), coil of strip yield strength are more than the upper limit：After coil of strip being washed off surface antirust oil and leveling precision on cleaning line,
Bell-type annealing furnace annealing, and the extension 4h soaking times on original annealing process are reentered, then is carried out smooth；
There is greasy dirt defect and mottling defect in situation b), coil of strip surface：Coil of strip is washed off surface antirust oil on cleaning line
After leveling precision, bell-type annealing furnace annealing is reentered, while increasing the hydrogen flowing quantity during cover annealing；
Have there is muscle in situation c), coil of strip surface：By increasing core of steel coil reel in rewinding unit, and reduce coiling tension
Method eliminate such defect；
There is the almost impression class defect without feel in situation d), coil of strip surface：Using large roughness roll in planisher
Group is rolled to eliminate such defect again；
Situation e), coil of strip surface have the impression class defect of feel：By estimating impression depth, rolled again if acid rolls
Absolute draft amount be more than the half of depth of defect, overweight bundling unit expands steel band internal diameter；The coil of strip that internal diameter expands passes through
Sour rolling mill is rolled again, and the Reducing thickness of rolled piece is more than two times of depth of defect.
Further, the corresponding processing methods of situation a) are specially：By coil of strip cleaning line by alkali hydro-peening, alkali scrub,
Surface of steel plate remaining leveling precision and antirust oil are washed off after electrolytic cleaned, water scrub, water rinsing, drying, are reentered bell-type and are moved back
Stove is annealed, and the thickness according to steel band is using 0.6% low extension in the insulation elongated segment 4h of original annealing process after annealing
Rate carries out smooth.
Further, the corresponding processing methods of situation b) are specially：By coil of strip cleaning line by alkali hydro-peening, alkali scrub,
Surface of steel plate remaining leveling precision and antirust oil are washed off after electrolytic cleaned, water scrub, water rinsing, drying, are reentered bell-type and are moved back
Stove is annealed, while increasing the warming-up section during cover annealing, the hydrogen purge amount of soaking zone reaches maximum set value, is increased
Plus Deoxidation Atmosphere in Furnace and normal pressure, impurity is taken away using air-flow.
Further, coiling tension is reduced in the corresponding processing methods of situation c) to minimum 15kN.
Further, the corresponding processing methods of situation d) are specially：Used on planisher roughness for 4.0 roll,
And elongation percentage is set as 1.5%.
The present invention compared with the prior art, with following significant advantage and effect：Implement after the present invention, it is possible to use cold
The existing equipment for rolling production line as much as possible improves the qualification rate of cold-rolled products.
Brief description of the drawings
Fig. 1 is the processing technological flow figure that coil of strip yield strength is more than the upper limit；
Fig. 2 is that coil of strip surface the processing technological flow figure of greasy dirt defect and mottling defect occurs；
Fig. 3 has been the schematic diagram of the coil of strip of muscle before and after the processing；
Fig. 4 is the processing technological flow figure that the almost impression class defect without feel occurs in coil of strip surface；
Fig. 5 is the processing technological flow figure for the impression class defect that coil of strip surface has feel.
Embodiment
In order that those skilled in the art more fully understand the present invention program, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
In a kind of specific embodiment, the invention provides a kind of place of think gauge cold rolling levelling coil of strip faulty goods
Reason method, it is the defect type according to think gauge cold rolling levelling coil of strip, is handled according to following corresponding method：
Situation a), coil of strip yield strength are more than the upper limit：After coil of strip being washed off surface antirust oil and leveling precision on cleaning line,
Bell-type annealing furnace annealing, and the extension 4h soaking times on original annealing process are reentered, then is carried out smooth；So as to effectively drop
Low yield strength, improves cold rolling qualification rate.Process chart refers to Fig. 1.
There is greasy dirt defect and mottling defect in situation b), coil of strip surface：Coil of strip is washed off surface antirust oil on cleaning line
After leveling precision, bell-type annealing furnace annealing is reentered, while increasing the hydrogen flowing quantity during cover annealing；So as to be lifted
Plate surface quality, improves cold rolling qualification rate.Process chart refers to Fig. 2.
Have there is muscle in situation c), coil of strip surface：By increasing core of steel coil reel in rewinding unit, and reduce coiling tension
Method eliminate such defect；Refer to Fig. 3.
There is the almost impression class defect without feel in situation d), coil of strip surface：Using large roughness roll in planisher
Group is rolled to eliminate such defect again；Process chart refers to Fig. 4.
Situation e), coil of strip surface have the impression class defect of feel：By estimating impression depth, rolled again if acid rolls
Absolute draft amount be more than the half of depth of defect, overweight bundling unit expands steel band internal diameter；The coil of strip that internal diameter expands passes through
Sour rolling mill is rolled again, and the Reducing thickness of rolled piece is more than two times of depth of defect.Process chart refers to Fig. 5.
It is used as the preferred scheme of the present invention：
The corresponding processing methods of situation a) are specially：By coil of strip cleaning line by alkali hydro-peening, alkali scrub, electrolytic cleaned,
Surface of steel plate remaining leveling precision and antirust oil are washed off after water scrub, water rinsing, drying, reenter bell-type annealing furnace annealing,
Thickness according to steel band is put down in the insulation elongated segment 4h of original annealing process after annealing using 0.6% low elongation
It is whole.
The corresponding processing methods of situation b) are specially：By coil of strip cleaning line by alkali hydro-peening, alkali scrub, electrolytic cleaned,
Surface of steel plate remaining leveling precision and antirust oil are washed off after water scrub, water rinsing, drying, reenter bell-type annealing furnace annealing,
Warming-up section, the hydrogen purge amount of soaking zone during increasing cover annealing simultaneously are reached in maximum set value, increase stove also
Originality atmosphere and normal pressure, impurity is taken away using air-flow.
Coiling tension is reduced in the corresponding processing methods of situation c) to minimum 15kN.
The corresponding processing methods of situation d) are specially：Used on planisher roughness for 4.0 roll, and by elongation percentage
It is set as 1.5%.
The thickness of think gauge cold rolling levelling coil of strip of the present invention may be greater than 1.8mm.
In the processing method for the above-mentioned think gauge cold rolling levelling coil of strip that the present invention was provided, rolled out first against cold rolling levelling
The investigation of system is carried out after existing surface defect, the actual conditions of defect is observed, finds out defect Producing reason, make solution
The measure of defect.
The present invention compared with the prior art, with following significant advantage and effect：Implement after the present invention, it is possible to use cold
The existing equipment for rolling production line as much as possible improves the qualification rate of cold-rolled products.
The processing method to think gauge cold rolling levelling coil of strip faulty goods provided by the present invention has carried out detailed Jie above
Continue.Specific case used herein is set forth to the principle and embodiment of the present invention, and the explanation of above example is only
It is the method and its core concept for being used to help understand the present invention.It should be pointed out that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, these improve and repaiied
Decorations are also fallen into the protection domain of the claims in the present invention.
Claims (5)
1. a kind of processing method of think gauge cold rolling levelling coil of strip faulty goods, it is characterised in that according to think gauge cold rolling levelling
The defect type of coil of strip, is handled according to following corresponding method：
Situation a), coil of strip yield strength are more than the upper limit：After washing coil of strip off surface antirust oil and leveling precision on cleaning line, again
Into bell-type annealing furnace annealing, and the extension 4h soaking times on original annealing process, then carry out smooth；
There is greasy dirt defect and mottling defect in situation b), coil of strip surface：Wash coil of strip off surface antirust oil peace on cleaning line
After whole liquid, bell-type annealing furnace annealing is reentered, while increasing the hydrogen flowing quantity during cover annealing；
Have there is muscle in situation c), coil of strip surface：By increasing core of steel coil reel in rewinding unit, and reduce doing for coiling tension
Method eliminates such defect；
There is the almost impression class defect without feel in situation d), coil of strip surface：Entered using large roughness roll in skin pass mill group
Row rolls to eliminate such defect again；
Situation e), coil of strip surface have the impression class defect of feel：By estimating impression depth, if acid rolls roll again exhausted
It is more than the half of depth of defect to drafts, overweight bundling unit expands steel band internal diameter；The coil of strip that internal diameter expands rolls through peracid
Unit is rolled again, and the Reducing thickness of rolled piece is more than two times of depth of defect.
2. processing method according to claim 1, it is characterised in that
The corresponding processing methods of situation a) are specially：Coil of strip is passed through into alkali hydro-peening, alkali scrub, electrolytic cleaned, water brush in cleaning line
Wash, water rinsing, wash surface of steel plate remaining leveling precision and antirust oil off after drying, reenter bell-type annealing furnace annealing, foundation
The thickness of steel band is using 0.6% low elongation progress smooth in the insulation elongated segment 4h of original annealing process after annealing.
3. processing method according to claim 1, it is characterised in that
The corresponding processing methods of situation b) are specially：Coil of strip is passed through into alkali hydro-peening, alkali scrub, electrolytic cleaned, water brush in cleaning line
Wash, water rinsing, wash surface of steel plate remaining leveling precision and antirust oil off after drying, reenter bell-type annealing furnace annealing, simultaneously
Warming-up section, the hydrogen purge amount of soaking zone during increasing cover annealing reach maximum set value, increase furnace reduction
Atmosphere and normal pressure, impurity is taken away using air-flow.
4. processing method according to claim 1, it is characterised in that
Coiling tension is reduced in the corresponding processing methods of situation c) to minimum 15kN.
5. processing method according to claim 1, it is characterised in that
The corresponding processing methods of situation d) are specially：Use roughness for 4.0 roll on planisher, and elongation percentage is set
For 1.5%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710297026.0A CN107185991B (en) | 2017-04-28 | 2017-04-28 | The processing method of think gauge cold rolling levelling coil of strip faulty goods |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710297026.0A CN107185991B (en) | 2017-04-28 | 2017-04-28 | The processing method of think gauge cold rolling levelling coil of strip faulty goods |
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| CN107185991A true CN107185991A (en) | 2017-09-22 |
| CN107185991B CN107185991B (en) | 2019-02-15 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553456A (en) * | 2020-12-15 | 2021-03-26 | 攀钢集团攀枝花钢钒有限公司 | Method for reducing yellow oil spot defects of bell-type furnace annealed steel coil |
| CN115261594A (en) * | 2022-07-18 | 2022-11-01 | 江西恒悦金属材料有限公司 | Cold-rolled coil corrosion defect eliminating process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112553456A (en) * | 2020-12-15 | 2021-03-26 | 攀钢集团攀枝花钢钒有限公司 | Method for reducing yellow oil spot defects of bell-type furnace annealed steel coil |
| CN112553456B (en) * | 2020-12-15 | 2022-08-16 | 攀钢集团攀枝花钢钒有限公司 | Method for reducing yellow oil spot defects of bell-type furnace annealed steel coil |
| CN115261594A (en) * | 2022-07-18 | 2022-11-01 | 江西恒悦金属材料有限公司 | Cold-rolled coil corrosion defect eliminating process |
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| CN107185991B (en) | 2019-02-15 |
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Effective date of registration: 20200325 Address after: 014015 new system office building in burhantu Town, Kundulun District, Baotou City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Baogang Metal Manufacturing Co., Ltd Address before: Hexi Industrial Zone 014000 the Inner Mongolia Autonomous Region Queensland District in Baotou City Patentee before: Inner Mongolia Baotou Steel Union Co.,Ltd. |
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Address after: 014015 new system office building, buerhantu Town, Kundulun District, Baotou City, Inner Mongolia Autonomous Region Patentee after: Inner Mongolia Baotou Steel Rare Earth steel plate Co.,Ltd. Address before: 014015 new system office building, buerhantu Town, Kundulun District, Baotou City, Inner Mongolia Autonomous Region Patentee before: Inner Mongolia Baogang Metal Manufacturing Co.,Ltd. |