CN1709597A - High-precision very-thin special-wide cold-rolled steel band and its working process - Google Patents
High-precision very-thin special-wide cold-rolled steel band and its working process Download PDFInfo
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- CN1709597A CN1709597A CN 200510041169 CN200510041169A CN1709597A CN 1709597 A CN1709597 A CN 1709597A CN 200510041169 CN200510041169 CN 200510041169 CN 200510041169 A CN200510041169 A CN 200510041169A CN 1709597 A CN1709597 A CN 1709597A
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Abstract
This present invention relates to a craftwork of very thin and very wide cold rolling steel band with high precision and its application. It belongs to a battery pole base plank material field. The acid cleaned hot steel rolling is cold rolled by the first rolling, then cut margin, degrease and anneal heat treatment. After cold rolled to 0.035-0.055mm by the second rolling and extended, bended, it can be cut out to finished product with client's demand. This invention has the virtues of simple and low cost. The latter disposal is simple and easy to master for company.
Description
Technical Field
The invention relates to a high-precision extremely-thin and extremely-wide cold-rolled steel strip and a processing technology thereof, in particular to a pole plate material widely used in a high-energy rechargeable battery, belonging to the technical field of battery electrode substrate materials.
Background
Due to the continuous development of scientific technology, the electronic component material has higher and higher requirements on the energy stored in unit volume of a battery and smaller requirements on the volume of an electronic component, and the steel strip serving as a carrier of the energy storage material and a component of the electronic component has the requirements of being as small as possible in thickness and as high as possible in performance. Before the present invention was made, the material used for the electrode substrate of the battery was usually a cold rolled strip having a thickness of 0.25mm as it was, and the cold rolled strip was subjected to cold rolling, heat treatment, straightening and the like. The rolling is carried out by adopting a twenty-high roll mill, the diameter of a working roll of 20 rolls is small, the shape of a product is directly influenced, the rolling method is complex in technology, high in cost and difficult to master, the post-treatment of the product is complex, the post-treatment is difficult to realize by general enterprises, the price of a cold-rolled strip is high, and the production cost is greatly increased.
Disclosure of Invention
The invention aims to overcome the defects, and provides the high-precision extremely-thin extra-wide cold-rolled steel strip and the processing technology thereof, wherein the manufacturing technology is simple, the price of the cold-rolled strip is low, the production cost can be reduced, the post-treatment of the product is simpler, the diameter of a four-roller mill is large, and the shape of the product cannot be influenced.
The main solution of the invention is realized as follows: the invention adopts a cold-rolled steel strip 1 to coil a coil material with a coil structure from inside to outside, and is characterized in that the thickness of the cold-rolled steel strip 1 is as follows: 0.035-0.055mm, width: 100-.
The invention mainly adopts the following process steps:
1. firstly, carrying out acid pickling treatment on a hot-rolled strip coil raw material, and heating acid liquor by using steam, wherein the heating temperature is as follows: the pickling speed is about 70-80 degrees centigrade: 10-20 m/min;
2. carrying out a first rolling process on the acid-washed steel strip by adopting a four-roller rolling mill, carrying out 9-11 times of cold rolling on emulsion for lubricating and cooling agent, and rolling to the thickness: 0.15-0.35 mm; the four high mill speed is: 200-400 m/min;
3. the cold-rolled steel strip is subjected to edge cutting, degreasing and coil loosening treatment, wherein the degreasing speed is as follows: 70-80 m/min;
4. carrying out heat treatment on the degreased cold-rolled steel strip, adopting nitrogen-hydrogen protective gas to prevent the surface of the steel strip from being oxidized, washing the steel strip by using nitrogen and vacuumizing to completely exhaust air in the steel strip, then heating up to the temperature of 45-55 ℃ per hour, keeping the temperature for 3-5 hours when the temperature is raised to 500 ℃ of 400-;
5. and (3) performing a second rolling process on the heat-treated steel strip, wherein rolling oil for lubricating a coolant is used, and the flow rate of the rolling oil is as follows: 980-1020L/min, the injection pressure is: 2.5-3.5Bar, oil temperature is as follows: the rolling mill speed is as follows at 40-60 deg.C: 300-600 m/min, the thickness is as follows: 0.035-0.055 mm.
6. Rolling to a specified thickness, stretching, bending, straightening and cutting to obtain afinished product, wherein the tension in the stretching and straightening process is as follows: 280-320MPa, the speed is as follows: 80-100 m/min.
Compared with the prior art, the invention has the following advantages:
the invention has simple manufacturing process, low price of the cold-rolled strip blank, reduced production cost, simpler post-treatment of the product, easy grasp of general enterprises, large diameter of the four-roller mill, no influence on the shape of the product and more flatness of the shape.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
FIG. 2 is a process flow diagram of the present invention.
Detailed Description
The invention will be further described with reference to examples in the drawings to which:
the first embodiment is as follows:
the invention selects hot rolling strip blank coil stock with the thickness as follows: 1.8-3.2mm, and the length is determined according to the requirement of a client. The thickness of the cold-rolled steel strip 1 after cold rolling is as follows: 0.035-0.055mm, width: 100-.
The invention adopts the following process steps:
1. the method comprises the following steps of carrying out acid cleaning treatment on a hot rolled strip blank roll raw material, wherein the concentration of an acid cleaning medium is not lower than 15% by adopting hydrochloric acid aqueous solution, and heating acid solution by using steam at the temperature: the pickling speed is controlled according to the cleanliness of the surface of the steel strip at about 70 ℃, and is generally 15 m/min, so that the oxide skin on the surface of the steel strip can be washed away to the maximum extent;
2. the thickness of the hot rolled strip in the first pass is selected based on the user's requirements for the physical properties of the finished strip and the thickness of the final product. The first rolling process is carried out on a four-roller rolling mill, the first rolling process is to roll the hot rolled strip from 1.8-3.2mm to 0.15-0.35mm thick, the total reduction rate is more than 90%, the cleanliness of the surface of the finished steel strip in future is ensured, and the pollution to a lubricating coolant of a rolling process is reduced as much as possible, therefore, the first rolling process adopts emulsion, and the volume concentration of the emulsion is selected as follows: 4-6%, and the pH value is: the oil used to prepare the emulsion is QUAK ROLL II. The thickness of the hot rolled strip is rolled to be 0.15-0.25mm through 9-11 passes, and the speed of a four-high mill is as follows: 200 m/min, and then degreasing;
3. in order to ensure the cleanness of the surface of the steel strip and no bonding during annealing, the cold-rolled steel strip is subjected to trimming, degreasing and coil loosening treatment, wherein the degreasing is carried out on a continuous line through a metal surface detergent solution tank → a water washing tank → a NaOH alkaline tank and electrolytic degreasing → clean water washing → brushing → drying → recoiling. The volume concentration of the cleaning agent solution is as follows: 7-8%, and NaOH solution: 35-45%, the solution temperature is: 65 ℃, and the drying temperature is as follows: the degreasing speed is as follows at 100 ℃: 70 m/min;
4. the cold-rolled steel strip after high reduction rate is subjected to heat treatment to recover the processability, and in order to ensure that the surface of the steel strip is not oxidized and keeps bright, 25% N of nitrogen-hydrogen protective gas is used2+75％H2The nitrogen-hydrogen protective gas is obtained by decomposing liquid ammonia at about 800 deg.C and using Ni as catalyst . In order to ensure that good processing performance is obtained after annealing, the furnace is washed by using nitrogen and vacuumizing after charging, the air in the furnace is completely exhausted, then the temperature is raised at the speed of 45 ℃ per hour, the temperature is kept for 3 hours when the temperature is raised to 400 ℃, then the temperature is continuously raised to 600 ℃ and kept for 11 hours, then the power is cut off, the temperature is lowered to 520 ℃, a heating cover is uncovered, the air is cooled to 320 ℃, and the furnace is taken out after the water is cooled to 70 ℃;
5. the most important in the invention is the second rolling process, the thickness of the first rolling process is rolled from (0.15 mm-0.35 mm) to (0.035 mm-0.055 mm), and the first rolling process is also rolled in a single-frame four-roller rolling mill. The lower ROLL of the working ROLL of the single-stand four-ROLL mill adopted in the invention is a flat ROLL, the upper ROLL has a convexity of 0.035mm in height, rolling lubricating coolant is mixed with Japanese DN ROLL OIL X-4K + FX-50 by using rolling OIL, and the flow rate of the coolant is as follows: 980 liters/min, injection pressure: 2.5Bar, the shower nozzle is installed at upper and lower, left and right sides, and the oil temperature is: the rolling speed is as follows at 40 ℃: 600 m/min;
6. and (3) straightening by stretching and bending after rolling to a specified thickness, wherein the straightening by pulling is to further improve the plate shape and meet the requirements of some special users. The steel strip passes through a withdrawal and straightening machine with S-shaped rollers at two ends and a bending roller in the middle, and the applied tension in the running process is as follows: 280Mpa, at the highest speed: 80 m/min, the steel strip becomes more straight after the withdrawal and straightening treatment;
7. and the cutting is to be sent to the user after being subjected to strip packaging according to the using width required by the user.
Example two
The invention selects hot rolling strip blank coil stock with the thickness as follows: 1.8-3.2mm, and the length is determined according to the requirement of a client. The thickness of the cold-rolled steel strip 1 after cold rolling is as follows: 0.035-0.055mm, width: 100-.
The invention adopts the following process steps:
1. the method comprises the following steps of carrying out acid cleaning treatment on a hot rolled strip blank roll raw material, wherein the concentration of an acid cleaning medium is not lower than 15% by adopting hydrochloric acid aqueous solution, and heating acid solution by using steam at the temperature: controlling the pickling speed according to the cleanliness of the surface of the steel strip at about 75 ℃, wherein the pickling speed is generally 15 m/min;
2. the first rolling process is carried out on a four-roller rolling mill, the thickness of the hot rolled strip is rolled from 1.8-3.2mm to 0.15-0.35mm in the first rolling process, the total reduction rate reaches more than 90%, emulsion is adopted in the first rolling process, and the volume concentration of the emulsion is selected as follows: 4-6%, and the pH value is: the oil used for preparing the emulsion is QUAKROLL II. The thickness of the hot rolled strip is rolled to be 0.15-0.35mm through 9-11 passes, and the speed of a four-high mill is as follows: 300 m/min;
3. the cold-rolled steel strip is subjected to edge cutting, degreasing and coil loosening treatment, wherein the degreasing is performed on a continuous line, and the degreasing speed is as follows: 75 m/min;
4. to ensure that the surface of the steel strip is not oxidized and keeps bright, 25% N of nitrogen-hydrogen protective gas is used2+75％H2To ensure good processability after annealing, the method is characterized in thatAfter charging, nitrogen and vacuumizing are used for washing the furnace, the air in the furnace is completely exhausted, then the temperature is raised at the speed of 50 ℃ per hour, the temperature is kept for 4 hours when the temperature is raised to 450 ℃, then the temperature is continuously raised to 610 ℃ and kept for 12 hours, then the power is cut off, the temperature is lowered to 550 ℃, a heating cover is uncovered, the air is cooled to 350 ℃, and the furnace is taken out after the water is cooled to 75 ℃;
5. the second rolling pass rolled the hot rolled strip from (0.15 mm-0.35 mm) to (0.035 mm-0.055 mm) thick, also in a single stand four high mill. The rolling lubricating coolant is prepared by mixing ROLL OIL with a cooling liquid prepared by mixing ROLL OIL X-4K + FX-50, wherein the flow rate of the cooling liquid is as follows: 1000 liters/min, injection pressure: 3Bar, oil temperature is: the rolling speed is as follows at 50℃: 300 m/min;
6. the straightening and withdrawal aims to further improve the shape of the plate and meet the requirements of some special users. The tension applied during the run was: 300Mpa, at the highest speed: the steel strip becomes more straight after being pulled and straightened at the speed of 90 m/min;
7. and the cutting is to be sent to the user after being subjected to strip packaging according to the using width required by the user.
Example three:
the invention selects hot rolling strip blank coil stock with the thickness as follows: 1.8-3.2mm, and the length is determined according to the requirement of a client. The thickness of the cold-rolled steel strip 1 after cold rolling is as follows: 0.035-0.055mm, width: 100-.
The invention adopts the following process steps:
1. the method comprises the following steps of firstly carrying out acid pickling treatment on a hot rolled strip blank roll raw material, and heating acid liquor by using steam at the temperature: pickling speed is about 80 ℃, and the pickling speed is generally 15 m/min;
2. the first rolling process is carried out on a four-roller rolling mill, the thickness of the hot rolled strip is rolled from 1.8-3.2mm to 0.15-0.35mm in the first rolling process, the total reduction rate reaches more than 90%, emulsion is adopted in the first rolling process, and the volume concentration of the emulsion is selected as follows: 4-6%, and the pH value is: 7, rolling the hot rolled strip to be 0.15-0.35mm thick by 9-11 passes, wherein the speed of the four-high mill is as follows: 400 m/min;
3. the cold-rolled steel strip is subjected to edge cutting, degreasing and coil loosening treatment, wherein the degreasing is performed on a continuous line, and the degreasing speed is as follows: 80 m/min;
4. to ensure that the surface of the steel strip is not oxidized and keeps bright, 25% N of nitrogen-hydrogen protective gas is used2+75％H2After charging, nitrogen and vacuumizing are used for washing the furnace, the air in the furnace is completely exhausted, then the temperature is raised at the speed of 55 ℃ per hour, the temperature is kept for 5hours when the temperature is raised to 500 ℃, then the temperature is continuously raised to 620 ℃ and kept for 13 hours, then the power is cut off, the temperature is reduced to 580 ℃, a heating cover is uncovered, the air is cooled to 380 ℃, and the water is cooled to 80 ℃ to be discharged;
5. the hot-rolled strip was rolled from (0.15mm to 0.35mm) to (0.035mm to 0.055mm) thick in a single stand four-high rolling mill, and the rolling lubricating coolant was mixed with DN ROLL OILX-4K + FX-50 using rolling oil at a coolant flow rate of: 1020 l/min, the injection pressure is: 3.5Bar, oil temperature: the rolling speed is as follows at 60 ℃: 450 m/min;
6. after rolling to a specified thickness, straightening by stretching and bending, wherein the applied tension in the running process is as follows: 320Mpa, the highest speed: 100 m/min, the steel strip becomes more straight after the withdrawal and straightening treatment, and the finished product is obtained after cutting.
The raw materials adopted in the embodiment of the invention are purchased in the market, and the used equipment such as a single-stand four-roll mill and the like are conventional equipment.
Claims (2)
1. A high-precision extremely-thin and extremely-wide cold-rolled steel strip is coiled into a coiled structure coil material from inside to outside by adopting a cold-rolled steel strip (1), and is characterized in that the thickness of the cold-rolled steel strip (1) is as follows: 0.035-0.055mm, width: 100-.
2. A process for manufacturing a high precision ultra thin extra wide cold rolled steel strip according to claim 1, characterized by the following process steps:
(1) the hot-rolled strip coil raw material is subjected to acid pickling treatment, and the acid liquor is heated by steam at the heating temperature of: the pickling speed is about 70-80 degrees centigrade: 10-20 m/min;
(2) carrying out a first rolling process on the steel strip subjected to acid pickling by adopting a four-roller rolling mill, carrying out 9-11 times of cold rolling on emulsion for lubricating and cooling agent, and rolling to obtain a steel strip with a thickness: 0.15-0.35 mm; the four high mill speed is: 200-300 m/min;
(3) and performing trimming, degreasing and coil loosening treatment on the cold-rolled steel strip, wherein the degreasing speed is as follows: 70-80 m/min;
(4) performing heat treatment on the degreased cold-rolled steel strip, adopting nitrogen-hydrogen protective gas to prevent the surface of the steel strip from being oxidized, washing the furnace by using nitrogen and vacuumizing, completely exhausting air in the furnace, heating at the speed of 45-55 ℃ per hour, keeping the temperature for 3-5 hours when the temperature is raised to 400-580-plus-one temperature, continuing to raise the temperature to 580-620 ℃, keeping the temperature for 11-13 hours, then cutting off the power, cooling to 520-580-plus-one temperature, removing a heating cover, performing air cooling to 320-380 ℃, and performing water cooling to 70-80 ℃ to obtain the steel strip;
(5) and performing a second rolling process on the heat-treated steel strip, lubricating rolling oil for a coolant, wherein the flow rate of the rolling oil is as follows: 980-1020L/min, the injection pressure is: 2.5-3.5Bar, oil temperature is as follows: the rolling mill speed is as follows at 40-60 deg.C: 300-600 m/min, the thickness is as follows: 0.035-0.055 mm.
(6) Rolling to a specified thickness, stretching, bending, straightening and cutting to obtain a finished product, wherein the tension in the stretching process is as follows: 280-320MPa, the speed is as follows: 80-100 m/min.
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| CNB2005100411692A CN1319660C (en) | 2005-07-22 | 2005-07-22 | High-precision very-thin special-wide cold-rolled steel band and its working process |
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| CN100465300C (en) * | 2007-04-19 | 2009-03-04 | 无锡华生精密合金材料有限公司 | Method of producing stainless steel band for air injection steel reed |
| CN101376212B (en) * | 2007-08-29 | 2010-10-13 | 烨联钢铁股份有限公司 | Cold rolling serial production line of product steel coil produced from white coil |
| CN102310314A (en) * | 2011-07-01 | 2012-01-11 | 云南钛业股份有限公司 | Processing method of titanium and titanium alloy strip coils |
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| CN104607465A (en) * | 2015-01-30 | 2015-05-13 | 河北钢铁股份有限公司邯郸分公司 | Pickling-rolling process of thin-gauge household appliance steel of 300 mu]m and below |
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| JPS58196149A (en) * | 1982-05-11 | 1983-11-15 | Furukawa Electric Co Ltd:The | Continuous production of lead or lead alloy plate or rod |
| AU4922393A (en) * | 1992-09-16 | 1994-04-12 | Bolder Battery, Inc. | Thin lead film rolling apparatus and method |
| TW477726B (en) * | 1999-07-09 | 2002-03-01 | Toyo Kohan Co Ltd | Method of manufacturing battery core body |
| JP4052140B2 (en) * | 2003-02-12 | 2008-02-27 | Ｊｆｅスチール株式会社 | Steel plate shape correction method |
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| CN100465300C (en) * | 2007-04-19 | 2009-03-04 | 无锡华生精密合金材料有限公司 | Method of producing stainless steel band for air injection steel reed |
| CN101376212B (en) * | 2007-08-29 | 2010-10-13 | 烨联钢铁股份有限公司 | Cold rolling serial production line of product steel coil produced from white coil |
| CN102310314A (en) * | 2011-07-01 | 2012-01-11 | 云南钛业股份有限公司 | Processing method of titanium and titanium alloy strip coils |
| CN102310314B (en) * | 2011-07-01 | 2013-03-20 | 云南钛业股份有限公司 | Processing method of titanium and titanium alloy strip coils |
| CN102699019B (en) * | 2012-04-24 | 2015-10-28 | 永鑫精密材料（无锡）有限公司 | A kind of communications industry half-etching precise stainless steel strip, its production technology and uses thereof |
| CN102699019A (en) * | 2012-04-24 | 2012-10-03 | 永鑫精密材料（无锡）有限公司 | Partially-etched precision stainless steel strip used in communication industry as well as production process and application thereof |
| CN102658294A (en) * | 2012-05-09 | 2012-09-12 | 永鑫精密材料（无锡）有限公司 | Low-carbon cold-rolled precision ultrathin steel strip for toy industry, and process method and application thereof |
| CN102658294B (en) * | 2012-05-09 | 2015-09-02 | 永鑫精密材料（无锡）有限公司 | The very thin steel band of toy industry mild steel precision cold-rolled, its process and uses thereof |
| CN102794318A (en) * | 2012-09-04 | 2012-11-28 | 无锡银荣板业有限公司 | Separation process of single-faced or double-faced aluminum-steel compound material |
| CN102794318B (en) * | 2012-09-04 | 2014-07-30 | 无锡银荣板业有限公司 | Separation process of single-faced or double-faced aluminum-steel compound material |
| CN104607465A (en) * | 2015-01-30 | 2015-05-13 | 河北钢铁股份有限公司邯郸分公司 | Pickling-rolling process of thin-gauge household appliance steel of 300 mu]m and below |
| CN105798061A (en) * | 2016-03-23 | 2016-07-27 | 天津炬坤金属科技有限公司 | Cold rolling method of ultrathin precise medium-width tinplate substrate of 0.05-0.1 mm with mirror surface light |
| CN105880297A (en) * | 2016-05-05 | 2016-08-24 | 首钢京唐钢铁联合有限责任公司 | Setting method, device and system for trimming width of cold rolled strip steel |
| CN105880297B (en) * | 2016-05-05 | 2017-12-26 | 首钢京唐钢铁联合有限责任公司 | A kind of cold-strip steel trimming width establishing method, apparatus and system |
| CN107881302A (en) * | 2016-08-29 | 2018-04-06 | 武汉佰起科技有限公司 | A kind of processing strip method of energy stabilised quality |
| CN113578962A (en) * | 2021-07-23 | 2021-11-02 | 安徽楚江特钢有限公司 | Production method of ultrathin cold-rolled steel strip for clothing |
| CN113578962B (en) * | 2021-07-23 | 2023-08-04 | 安徽楚江特钢有限公司 | Production method of ultrathin cold-rolled steel strip for clothes |
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