CN102296231A - Method for producing 0.25-0.35mm super-bright cold-rolled sheet by continuous annealing unit - Google Patents
Method for producing 0.25-0.35mm super-bright cold-rolled sheet by continuous annealing unit Download PDFInfo
- Publication number
- CN102296231A CN102296231A CN 201010209270 CN201010209270A CN102296231A CN 102296231 A CN102296231 A CN 102296231A CN 201010209270 CN201010209270 CN 201010209270 CN 201010209270 A CN201010209270 A CN 201010209270A CN 102296231 A CN102296231 A CN 102296231A
- Authority
- CN
- China
- Prior art keywords
- percent
- continuous annealing
- cold
- equal
- less
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000137 annealing Methods 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000005096 rolling process Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 8
- 238000005498 polishing Methods 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 5
- 238000007906 compression Methods 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- 238000001953 recrystallisation Methods 0.000 claims description 3
- 239000002699 waste material Substances 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 238000005097 cold rolling Methods 0.000 description 6
- 238000011084 recovery Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000000007 visual effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Metal Rolling (AREA)
- Heat Treatment Of Sheet Steel (AREA)
Abstract
The invention provides a method for producing 0.25-0.35mm super-bright cold-rolled sheet by a continuous annealing unit, which comprises the following chemical components: 0.06-0.08 percent of C, less than or equal to 0.03 percent of Si, 0.25-0.35 percent of Mn, less than or equal to 0.015 percent of P, less than or equal to 0.012 percent of S, 0.01-0.05 percent of AlsN and less than or equal to 0.006 percent of N, the flat elongation is controlled between 0.25-0.40 percent by controlling the traveling speed of the strip steel in a continuous annealing furnace and adopting a smooth roll with lower annealing temperature and 0.3-0.4 mu m of roughness to roll, so that the large vertical continuous annealing unit can produce a cold-rolled ultra-smooth panel with the thickness of 0.25-0.35mm in a qualified way, the average tensile strength reaches 347MPa, the elongation after fracture is 45.5 percent, the condition that the plate shape is unqualified is avoided, the residue, secondary and waste products are obviously reduced, and the variety yield can be improved by more than 7 percent compared.
Description
Technical field
The invention belongs to the cold-rolling process field, be specifically related to a kind of method of utilizing the cold rolled continuous annealing unit to produce the thin cold rolled strip of ultraphotic.
Background technology
The cold rolling panel of ultraphotic mainly is to use in products such as auto parts and jewellery, and its thickness requires steel surface roughness below 0.6 μ m, and visual visual defects can not be arranged generally at 0.25~0.5mm.Though the user takes itemize to use more, and is less demanding to plate shape; But the cold rolling panel of ultraphotic is had relatively high expectations to the surface, because supplied materials smooth surface, when producing, very easily cause by continuous annealing furnace the band steel to skid, make the surface quality of ultraphotic panel not reach the effect that bell furnace is produced on the contrary, therefore this generally speaking ultraphotic panel all adopts batch annealing production.
In the batch annealing production process, exist bonding, heat to press against defectives such as wound inevitably, and so thin band steel rolling time Mo rolling mill must adopt the smooth roll of utmost point low roughness rolling, make plate shape extremely be difficult to control.And plate shape is bad behind the belt steel rolling, after the process cover annealing, unrelieved stress is released in the band steel, during through smooth unit, the control of plate shape is difficulty more, often cause the plate shape claimed range that is above standard, have to take again smooth to the band steel, processing is reprocessed in measures such as aligning, not only waste time and energy, and the band steel after handling still has major part can't satisfy user's service requirements, causes the lumber recovery of ultraphotic panel to be paced up and down 85% always, and the cold rolling panel of ultraphotic is rolling in addition, hourly capacity when smooth is very low, thereby it is low directly to cause bell furnace to produce ultraphotic panel lumber recovery, the ill effect that production efficiency is low, both wasted energy, influenced output again, and caused a large amount of residual, inferior, waste product, increase production cost, reduced economic return.
Summary of the invention
Purpose of the present invention is exactly at above-mentioned defective, provides a kind of large-scale vertical continuous annealing furnace that utilizes to produce the cold rolling ultraphotic panel of 0.25-0.35mm, and can increase substantially the method for kind lumber recovery.
For this reason, the technical solution that the present invention taked is:
A kind of continuous annealing unit is produced the method for 0.25-0.35mm ultraphotic cold-reduced sheet, and its material chemical component weight percent content is:
C0.06~0.08, Si≤0.03, Mn 0.25~0.35, P≤0.015, S≤0.012, Als 0.01~0.05, N≤0.006, surplus is Fe and impurity;
The cold-rolled compression ratio is 83.3~85%;
The traveling speed of band steel in continuous annealing furnace is between 220~240m/min, and annealing temperature is controlled at above 50~80 ℃ of recrystallization temperature;
Polishing machine working roll roughness is 0.3~0.4 μ m, and smooth elongation control is 0.25~0.40%, and the polishing rolling load is controlled at 300~400t.
Adopt the present invention's method to realize the cold rolling ultraphotic panel of large-scale vertical continuous annealing unit production 0.25-0.35mm, and its yield strength and tensile strength are all than adopting usual way production to exceed 20~40MPa, average tensile strength reaches 347MPa, and elongation after fracture is 45.5%.Especially pass through the annealing of large-scale vertical continuous annealing furnace and the rectification of furnace roller, avoided the underproof situation of plate shape, obviously reduced residual, inferior, waste product, compare with bell furnace production, its kind lumber recovery has improved more than 7%, has increased the economic return of enterprise.
Embodiment
Embodiment 1:
Slab thickness 1.9mm produces 0.25mm ultraphotic panel.
The material chemical component weight percent content is:
C0.06, Si0.028, Mn0.34, P0.012, S0.010, Als0.015, N0.005, surplus is Fe and impurity;
The traveling speed of band steel in continuous annealing furnace should not be too high, but can not be low excessively.Traveling speed is too high, the tension force instability, and the stability of production also decreases, and degree-of-difficulty factor is corresponding to be increased; Traveling speed is low excessively, and then annealing time prolongs, can cause being with hardness of steel to descend significantly, and the steel deliquescing, and be easy to generate wrinkle defect, therefore be controlled at 235m/min with the traveling speed of steel in continuous annealing furnace.
Generally speaking, the annealing temperature of common CQ steel is 760 ℃.But because the very thin thickness of the 0.25mm ultraphotic panel that will produce, cold-rolled compression is bigger than again, so annealing temperature needs suitably to reduce.The recrystallization temperature of considering common CQ steel is about 650 ℃, so the selective annealing temperature is at 710 ℃.
Adopt 84.2% big cold-rolled compression ratio, rolling back finished strip thickness is that 0.3mm, width are 950mm.
According to standard and customer requirements, polishing machine selection working roll roughness is that the smooth roll of 0.3 μ m is rolling, and for safety, its polishing rolling load is controlled at 330t.
Because annealing temperature is relatively low, though that the metal recrystallize can carry out is abundant fully inadequately, therefore adopt lower smooth unit elongation, smooth elongation control is got final product 0.4%.
Embodiment 2:
Slab thickness 2.0mm produces 0.32mm ultraphotic panel
Raw material control composition weight percent content is:
C0.08, Si0.02, Mn0.25, P0.010, S0.008, Als0.05, N0.0045, surplus is Fe and impurity;
The traveling speed of band steel in continuous annealing furnace is controlled at 235m/min;
Annealing temperature is at 730 ℃;
Adopt 85% big cold-rolled compression ratio, rolling back finished strip thickness is that 0.3mm, width are 950mm.
Polishing employing roughness is that the smooth roll of 0.5 μ m is rolling, and rolling load is controlled at 390t;
Satisfying under the prerequisite of performance, adopting 0.28% smooth unit elongation.
Claims (1)
1. a continuous annealing unit is produced the method for 0.25-0.35mm ultraphotic cold-reduced sheet, it is characterized in that described ultraphotic cold-reduced sheet material chemical component and weight percent content are:
C0.06~0.08, Si≤0.03, Mn 0.25~0.35, P≤0.015, S≤0.012, Als 0.01~0.05, N≤0.006, surplus is Fe and impurity;
The cold-rolled compression ratio is 83.3~85%;
The traveling speed of band steel in continuous annealing furnace is between 220~240m/min, and annealing temperature is controlled at above 50~80 ℃ of recrystallization temperature;
Polishing machine working roll roughness is 0.3~0.4 μ m, and smooth elongation control is 0.25~0.40%, and the polishing rolling load is controlled at 300~400t.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201010209270 CN102296231B (en) | 2010-06-25 | 2010-06-25 | Method for producing 0.25-0.35mm super-bright cold-rolled sheet by continuous annealing unit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 201010209270 CN102296231B (en) | 2010-06-25 | 2010-06-25 | Method for producing 0.25-0.35mm super-bright cold-rolled sheet by continuous annealing unit |
Publications (2)
Publication Number | Publication Date |
---|---|
CN102296231A true CN102296231A (en) | 2011-12-28 |
CN102296231B CN102296231B (en) | 2013-05-01 |
Family
ID=45356905
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN 201010209270 Active CN102296231B (en) | 2010-06-25 | 2010-06-25 | Method for producing 0.25-0.35mm super-bright cold-rolled sheet by continuous annealing unit |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN102296231B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103074542A (en) * | 2012-12-28 | 2013-05-01 | 浙江龙盛薄板有限公司 | Steel strip for LED bracket and manufacturing method thereof |
CN103194670A (en) * | 2013-03-26 | 2013-07-10 | 浙江龙盛薄板有限公司 | Steel strip for household electric appliance panel and production method thereof |
CN103194591A (en) * | 2013-03-28 | 2013-07-10 | 鞍钢股份有限公司 | Method for producing steel for ultrathin automobile water tank by continuous annealing line |
CN103205629A (en) * | 2013-03-26 | 2013-07-17 | 浙江龙盛薄板有限公司 | High-hardness steel belt for home appliances and manufacturing method |
CN109351783A (en) * | 2018-10-09 | 2019-02-19 | 首钢京唐钢铁联合有限责任公司 | Method for flatly rolling guide rail steel with ultralow roughness |
CN111334709A (en) * | 2020-03-06 | 2020-06-26 | 湖南华菱涟源钢铁有限公司 | Cold-rolled double-light plate and manufacturing method and application thereof |
CN113070340A (en) * | 2021-03-16 | 2021-07-06 | 鞍钢股份有限公司 | Production process of cold-rolled super-smooth surface strip steel |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101646796A (en) * | 2007-03-30 | 2010-02-10 | 杰富意钢铁株式会社 | Ultra-thin cold-rolled steel sheet for building material and process for production of the same |
-
2010
- 2010-06-25 CN CN 201010209270 patent/CN102296231B/en active Active
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101646796A (en) * | 2007-03-30 | 2010-02-10 | 杰富意钢铁株式会社 | Ultra-thin cold-rolled steel sheet for building material and process for production of the same |
Non-Patent Citations (2)
Title |
---|
《江西冶金》 20091031 张贵春 等 冷轧带钢连续退火机组的技术特点及应用 1 第29卷, 第5期 * |
《钢铁技术》 20090430 毛尚伟 等 镀锌机组中光整机的过程控制模型 1 , 第2期 * |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103074542A (en) * | 2012-12-28 | 2013-05-01 | 浙江龙盛薄板有限公司 | Steel strip for LED bracket and manufacturing method thereof |
CN103194670A (en) * | 2013-03-26 | 2013-07-10 | 浙江龙盛薄板有限公司 | Steel strip for household electric appliance panel and production method thereof |
CN103205629A (en) * | 2013-03-26 | 2013-07-17 | 浙江龙盛薄板有限公司 | High-hardness steel belt for home appliances and manufacturing method |
CN103194670B (en) * | 2013-03-26 | 2015-10-21 | 浙江龙盛薄板有限公司 | A kind of Steel strip for household electric appliance panel and manufacture method |
CN103194591A (en) * | 2013-03-28 | 2013-07-10 | 鞍钢股份有限公司 | Method for producing steel for ultrathin automobile water tank by continuous annealing line |
CN109351783A (en) * | 2018-10-09 | 2019-02-19 | 首钢京唐钢铁联合有限责任公司 | Method for flatly rolling guide rail steel with ultralow roughness |
CN111334709A (en) * | 2020-03-06 | 2020-06-26 | 湖南华菱涟源钢铁有限公司 | Cold-rolled double-light plate and manufacturing method and application thereof |
CN113070340A (en) * | 2021-03-16 | 2021-07-06 | 鞍钢股份有限公司 | Production process of cold-rolled super-smooth surface strip steel |
Also Published As
Publication number | Publication date |
---|---|
CN102296231B (en) | 2013-05-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102296231B (en) | Method for producing 0.25-0.35mm super-bright cold-rolled sheet by continuous annealing unit | |
CN107641759B (en) | Method for producing thin-specification hot forming steel based on CSP (cast Steel plate) process | |
CN103740990A (en) | Aluminum alloy strip for automobile heat insulation cover and manufacturing method thereof | |
CN102658452A (en) | Processing method of copper strip used for copper steel composites | |
CN104946969A (en) | Hot-rolled pickled steel plate for air conditioner compressor housings and manufacturing method thereof | |
CN101486051A (en) | Method for leveling titanium board coil | |
CN102703815A (en) | 600 MPa-grade hot-rolled dual-phase steel and preparation method thereof | |
CN108265227A (en) | A kind of electronic component high-precision ultra-thin cold-rolled strip and its production method | |
CN111097798A (en) | Stable production method of hot-rolled thin-specification ultrahigh-strength quenched ductile steel | |
CN102179407A (en) | Method for preparing hot rolling strip steel capable of preventing edge crack of extremely thin rolled strip steel | |
CN105087881A (en) | Annealing method for 304 stainless steel | |
CN101322977A (en) | Coil cold rolling industrial pure titanium plate coil | |
CN102839322A (en) | Hot galvanizing steel plate for car and production method thereof | |
TW201835350A (en) | Hot stamp moulded body | |
CN103831627A (en) | Method for lowering surface roughness of cold-rolled nickel stainless steel bright plate | |
CN105506469A (en) | Anti-stamping-distortion aluminum-and-zinc-plated steel and production method thereof | |
CN104087839A (en) | Steel for hot-rolling ultra-thin laser welding saw blade base and production method | |
CN201399466Y (en) | Endless rolling cold continuous rolling device | |
CN102553920A (en) | Production method of aluminum tape for base of printing plate | |
WO2021104292A1 (en) | Multi-layer rolled composite board and manufacturing method therefor | |
CN101993988B (en) | Method for producing ultrathin ultra-deep stamping cold-rolled sheet by vertical continuous annealing furnace | |
CN105441802B (en) | Titanium-containing acid pickling plate and preparation method thereof | |
CN102041501A (en) | Method for producing aluminum-steel composite board (belt) | |
CN102251177A (en) | High-strength steel plate containing rare earth and rolling method thereof | |
CN103700641A (en) | Steel strip for lead frame and production method thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant |