CN115896533A - Rolled copper foil and manufacturing method thereof - Google Patents
Rolled copper foil and manufacturing method thereof Download PDFInfo
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- CN115896533A CN115896533A CN202211357641.3A CN202211357641A CN115896533A CN 115896533 A CN115896533 A CN 115896533A CN 202211357641 A CN202211357641 A CN 202211357641A CN 115896533 A CN115896533 A CN 115896533A
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 55
- 239000011889 copper foil Substances 0.000 title claims abstract description 34
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 80
- 238000000137 annealing Methods 0.000 claims abstract description 65
- 239000010949 copper Substances 0.000 claims abstract description 25
- 239000012535 impurity Substances 0.000 claims abstract description 7
- 238000009826 distribution Methods 0.000 claims abstract description 6
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 229910052718 tin Inorganic materials 0.000 claims abstract description 5
- 229910052742 iron Inorganic materials 0.000 claims abstract description 3
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 3
- 239000000126 substance Substances 0.000 claims abstract description 3
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 3
- 238000005406 washing Methods 0.000 claims description 32
- 238000004140 cleaning Methods 0.000 claims description 27
- 239000002253 acid Substances 0.000 claims description 22
- 229910052802 copper Inorganic materials 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 20
- 238000002161 passivation Methods 0.000 claims description 19
- 239000003513 alkali Substances 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 15
- 238000003801 milling Methods 0.000 claims description 15
- 238000000227 grinding Methods 0.000 claims description 9
- 238000005097 cold rolling Methods 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 8
- 238000010008 shearing Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 238000009966 trimming Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 4
- 241001572354 Lycaena hyllus Species 0.000 abstract description 2
- BSPSZRDIBCCYNN-UHFFFAOYSA-N phosphanylidynetin Chemical compound [Sn]#P BSPSZRDIBCCYNN-UHFFFAOYSA-N 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 10
- 238000005238 degreasing Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 10
- 239000002893 slag Substances 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 229910000906 Bronze Inorganic materials 0.000 description 4
- 239000010974 bronze Substances 0.000 description 4
- 239000003610 charcoal Substances 0.000 description 4
- 230000001276 controlling effect Effects 0.000 description 4
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000001680 brushing effect Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 238000001953 recrystallisation Methods 0.000 description 3
- 238000005201 scrubbing Methods 0.000 description 3
- 238000005482 strain hardening Methods 0.000 description 3
- 238000010301 surface-oxidation reaction Methods 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- QRUDEWIWKLJBPS-UHFFFAOYSA-N benzotriazole Chemical compound C1=CC=C2N[N][N]C2=C1 QRUDEWIWKLJBPS-UHFFFAOYSA-N 0.000 description 2
- 239000012964 benzotriazole Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- RIRXDDRGHVUXNJ-UHFFFAOYSA-N [Cu].[P] Chemical compound [Cu].[P] RIRXDDRGHVUXNJ-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000005554 pickling Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Metal Rolling (AREA)
Abstract
The invention discloses a rolled copper foil and a manufacturing method thereof, wherein the rolled copper foil comprises the following chemical components in percentage by weight: 6 to 7 percent of Sn, 0.11 to 0.15 percent of P, less than or equal to 0.14 percent of Fe, less than or equal to 0.04 percent of Zn, less than or equal to 0.02 percent of Ni, less than or equal to 0.004 percent of Al, less than or equal to 0.002 percent of Si, and the balance of Cu and inevitable impurities; the tin-phosphorus bronze copper foil with excellent comprehensive performance, controllable thickness and plate shape, smooth and clean surface and 0.05mm thickness is obtained by controlling microalloy components, rolling pass distribution, rolling plate shape on-line monitoring, on-line annealing technology and stretch bending straightening technology.
Description
Technical Field
The invention belongs to the technical field of copper foil manufacturing, and particularly relates to a rolled copper foil and a manufacturing method thereof.
Background
The copper foil is divided into the following parts according to the production process: electrolytic copper foil and rolled copper foil are mainly applied to copper-clad pressing plates and lithium batteries. Although the rolled copper foil has a limited width and a high cost compared with the electrolytic copper foil, the characteristics of high flexibility, high purity and low roughness of the rolled copper foil cannot be replaced by the conventional electrolytic copper foil. The rolled copper foil has higher density and smooth surface, is beneficial to the rapid signal transmission after being manufactured into a printed circuit board, and is widely applied to the industrial fields of Flexible Copper Clad Laminates (FCCL), flexible circuit boards (FPC), 5/6G communication, electromagnetic shielding, LEDs and the like.
At present, 80 percent of the supply of rolled copper foil in the world comes from Japan, and the technical difficulty of producing the copper foil in China is great. The rolled copper foil is produced by investing in factories in domestic enterprises, but the existing rolled copper foil method has the defects of poor product plate thickness dimensional accuracy, low plate strip flatness, low elongation, poor mechanical property uniformity and poor stability, and is difficult to meet the market demand of the existing copper-clad plate.
Disclosure of Invention
The invention aims to provide a rolled copper foil and a manufacturing method thereof, which have excellent comprehensive performance, controllable thickness and plate type and smooth and clean surface.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a rolled copper foil comprises the following chemical components in percentage by weight: 6 to 7 percent of Sn, 0.11 to 0.15 percent of P, less than or equal to 0.14 percent of Fe, less than or equal to 0.04 percent of Zn, less than or equal to 0.02 percent of Ni, less than or equal to 0.004 percent of Al, less than or equal to 0.002 percent of Si, the balance of Cu and inevitable impurities, and the total amount of impurities is less than or equal to 0.1 percent.
The tensile strength of the rolled copper foil is 750-800 MPa, the yield strength is 720-750 MPa, the elongation is more than or equal to 6%, the hardness is 220-250 HV, the thickness tolerance is +/-1 mu m, and the roughness is 0.15-0.2 mu m.
The invention also provides a manufacturing method of the rolled copper foil, which sequentially comprises the following steps of: the method comprises the following steps of material proportioning, smelting, casting, homogenizing annealing, face milling, cold rolling and cogging, trimming, primary annealing in a bell type furnace, cleaning, roughing in a manufacturing process, secondary annealing in the bell type furnace, cleaning in the manufacturing process, intermediate rolling, annealing in an intermediate rolling process, pre-finishing rolling, bottom annealing, finishing rolling of finished products, annealing of the finished products, cleaning of the finished products, straightening of the finished products and shearing of the finished products.
In the smelting step, before each converter is transferred, slag is fished and copper slag in a launder is cleaned, the heat preservation furnace with the area covered by charcoal is used for fishing slag for 2 times per shift, namely, the slag is fished for 1 time after shift, and the slag is fished for another time after 4 hours. The slag is fished out 50% of the area of the slag in each time, charcoal is added immediately after the slag is fished out, then the slag is fished out by other charcoal with 50% of the area, the covering thickness is not less than 50mm, and the exhaust holes with 10% of the area are left to be not covered by the charcoal.
In the casting step, the casting temperature is 1190-1230 ℃, the cooling water inlet pressure is 0.04-0.2MPa, the water inlet temperature is 25-35 ℃, the water outlet temperature is 30-55 ℃, and the casting blank is normally drawn by a drawing-stopping-reverse-pushing process after passing through a drawing machine.
In the homogenizing annealing step, homogenizing annealing is carried out in a bell-type furnace, the annealing temperature is 600-700 ℃, and the heat preservation time is 6-10 h; the structure is uniform, and the casting structure defects are reduced.
In the surface milling step, the double-side milling machine is used for milling the surface of the strip blank and the side milling of the edge part, the upper milling and the lower milling are respectively 0.05-0.10 mm and the side milling is 1-5 mm, and the oxide skin of the surface layer and the hard fine grains of the surface layer are removed.
In the cold rolling and cogging step, cold rolling and cogging are carried out in a four-high mill, and the total reduction rate of the cold rolling and cogging is 80-85%.
In the trimming step, trimming is carried out on the copper strip after rough rolling on longitudinal shearing equipment, and the edge cracking part is removed.
In the primary annealing step of the bell-type furnace, the annealing temperature is 500-550 ℃, the heat preservation time is 4-6 h, and recrystallization is carried out to remove the work hardening.
In the cleaning step, the degreasing by alkali washing, the pickling, the grinding, the brushing and the passivation are carried out on a degreasing machine, wherein the alkali washing uses NaOH solution with the concentration of 1-3 wt%; the acid solution used for acid cleaning is a dilute sulfuric acid solution with the concentration of 6-11 wt%; the passivation solution used for passivation is benzotriazole with the concentration of 0.05-0.11 wt%.
In the rough rolling step, rough rolling is carried out in a four-roller rolling mill, and the total rolling reduction rate is 60-75%.
In the secondary annealing step of the bell-type furnace, the annealing temperature is 450-500 ℃, the heat preservation time is 4-6 h, and recrystallization is carried out to remove the work hardening.
In the step of cleaning, the degreasing machine is subjected to alkali washing degreasing, acid washing, grinding, brushing and passivation, wherein the alkali washing uses NaOH solution with the concentration of 1-3 wt%; the acid solution used for acid washing is a dilute sulfuric acid solution with the concentration of 6-11 wt%.
In the middle rolling step, middle rolling is carried out on a six-roller rolling mill, the total rolling reduction rate is 60-70%, and the rolling reduction rate distribution of one to four passes is 30-35%, 18-22%, 15-18% and 13-16%; the rolling speed is 200-220 m/min, the oil temperature is 35-37 ℃, the plasticity of the material can be changed by rolling, and the copper foil plate profile is controlled and lifted by using an online plate profile instrument in the middle rolling process.
In the step of the medium rolling annealing, heat treatment and cleaning are carried out on an air cushion type continuous annealing furnace, alkali washing, annealing, acid washing, grinding and passivation are carried out in sequence, the annealing temperature is 500-600 ℃, and the passing speed of the copper strip is 50-90 m/min.
In the pre-finish rolling step, the copper strip after the intermediate rolling and annealing is rolled in a twenty-high roll finishing mill, the total reduction rate is 50-60%, the reduction rate distribution of one to four passes is 30-32%, 15-20%, 10-15% and 7-12%, the rolling speed is 190-210 m/min, the oil temperature is 35-37 ℃, the plasticity of the material can be changed through rolling, and an online plate type instrument is used for controlling and lifting the copper foil plate type in the pre-finish rolling process.
In the step of bottom-retaining annealing, annealing and cleaning are carried out on an air cushion type continuous annealing furnace, alkali washing, annealing, acid washing, grinding and passivation are carried out in sequence, the annealing temperature is 545-555 ℃, and the passing speed of the copper strip is 95-105 m/min.
In the finish rolling step of the finished product, the copper strip after the bottom annealing is rolled in a twenty-high roll finishing mill, the total rolling reduction rate is 60-65%, and the reduction rate distribution of one to five passes is 28-30%, 15-20%, 15-18%, 10-15% and 7-12%; the rolling speed is 100-150m/min, the oil temperature is 35-37 ℃, and the roughness of the roller is Ra0.15-0.18; the X-ray thickness gauge is used for on-line monitoring, and the tolerance of the plate thickness is controlled to be +/-1 mu m; the plasticity of the material can be changed by rolling, and the copper foil plate shape is controlled and lifted by an online plate shape instrument in the finish rolling process of the finished product.
In the finished product cleaning step, cleaning in a degreasing machine, including alkali washing, acid washing, scrubbing and passivation, so as to prevent surface oxidation; the alkali liquor used for alkali washing is NaOH solution with the concentration of 2.5-6 wt%; acid liquor used for acid washing is dilute sulfuric acid solution with the concentration of 6-10 wt%; benzotriazole with the concentration of passivation solution used for passivation being 0.03-0.09 wt%; the temperature and the working temperature of the cleaning liquid are controlled to be 60-80 ℃, and the cleaning speed is 65m/min.
In the step of straightening the finished product, the elongation is 0.18-0.2%.
Compared with the prior art, the content of the Sn is reduced by 0.3 percent compared with the traditional QSn6.5-0.1Sn, and the control content of impurity elements is far lower than the national standard, so that the mechanical property of the product is stable, and the elongation of the product is improved; the cushion type annealing furnace replaces a bell jar type annealing furnace to carry out bottom annealing, so that the material annealing is more uniform and the mechanical property is more stable. The plate thickness tolerance is accurately controlled by the twenty-high roll mill, the plate type is regulated and controlled in real time by the plate type instrument through on-line monitoring, and the thickness dimension precision of the material plate and the flatness of the plate strip can be improved. Meanwhile, the low-stress stretch bending straightening technology is utilized to further ensure the flatness of the plate strip. Annealing the finished product at low temperature, controlling the temperature and the heat preservation time, and increasing the elongation from 3% to 6%.
The tin-phosphorus bronze copper foil with excellent comprehensive performance, controllable thickness and plate shape, smooth and clean surface and 0.05mm thickness is obtained by controlling microalloy components, rolling pass distribution, rolling plate shape on-line monitoring, on-line annealing technology and stretch bending straightening technology.
Detailed Description
The present invention will be described in detail with reference to examples.
Example 1
The rolled copper foil comprises the following components in percentage by mass: 6.5% of Sn, 0.13% of P, 0.008% of Fe, 0.03% of Zn, 0.012% of Ni, 0.001% of Al and the balance of Cu.
The manufacturing method of the rolled copper foil comprises the following steps:
1) Preparing materials: electrolytic copper, bronze return materials, bronze scraps, tin ingots, phosphorus-copper alloys and the like are respectively weighed and put into a smelting furnace.
2) Smelting: adding electrolytic copper, bronze return materials, bronze scrap materials and tin ingots in sequence, feeding the materials into a furnace for melting, wherein the use ratio of new materials to old materials is 5. In order to ensure the quality of the melt, the raw materials used should be clean, and must not contain oil, water, explosives, toxic organics and other metallic or non-metallic inclusions, and the covering agent must be dried, and the throwing of impurities into the furnace is prohibited. After the preparation of the molten liquid is finished, adjusting the components according to the sampling analysis result; and transferring the molten copper to a holding furnace for casting after the components are qualified.
3) Casting: when the composition was confirmed to be within the target range, casting was started: the casting temperature is 1205 ℃, the furnace body level and the copper liquid level are checked, the copper liquid level is not lower than the upper edge of a casting nozzle, a dummy ingot is prepared after a dummy ingot plate is installed, when a casting blank is manually pulled out of a crystallizer by 100-300 mm, the casting blank is switched to automatic pulling, a converter is started, and the water pressure is cooled: 0.1MPa.
4) Homogenizing and annealing: and performing 680 ℃/8h homogenization annealing in a bell jar annealing furnace to ensure that the casting blank recrystallizes to reduce casting structure defects and the crystal grains tend to be uniform.
5) Milling a surface: the double-side milling machine is arranged on the row for milling the surface of a strip blank and milling the edge twice, the milling amount is respectively 0.08mm from top to bottom, the milling amount is respectively 3mm from left to right, the surface oxidation and fine grain regions are completely removed, and the phenomena of pressing in, peeling and the like after rolling are prevented.
6) Initial rolling: and (5) carrying out cold rolling cogging on the milled strip blank on a four-high mill from 14mm to 2.5mm.
7) Trimming: trimming the strip blank after the initial rolling on longitudinal shearing equipment.
8) Primary annealing in a bell-type furnace: and (4) carrying out heat treatment on the trimmed strip blank on a bell-type furnace at 520 ℃/5h.
9) Cleaning a thick belt, wherein the thick belt is subjected to alkali washing degreasing, acid washing, grinding, brushing and passivation on a degreasing machine, and the concentration of alkali liquor used in the alkali washing is 2.6wt%; the acid liquor used for acid washing has the concentration of 9.7wt%; the concentration of the passivating solution used for passivation is 0.94wt%.
10 Rough rolling, four high rolling mill rolling the plate from 2.5mm to 0.8mm.
11 Secondary annealing in a bell-type furnace: and (3) carrying out heat treatment on the trimmed strip blank on a bell-type furnace, wherein the heating temperature is 480 ℃, the heat preservation time is 5 hours, and recrystallization is carried out to remove the work hardening.
12 Preparation cleaning, comprising alkaline washing degreasing, acid washing, grinding and scrubbing on a degreasing machine, wherein the concentration of alkaline liquor used in alkaline washing is 2.3wt%; the acid solution used for acid washing has a concentration of 9.5wt%; the concentration of the passivation solution used for passivation is 0.92wt%.
13 Medium rolling: rolling the copper strip after the preparation and cleaning in a six-roller finishing mill: the rolling process is 0.8mm-0.53mm-0.42mm-0.35mm-0.3mm; the rolling speed is 210m/min, the oil temperature is 36.2 ℃, the plasticity of the material can be changed through rolling, and meanwhile, the online plate shape instrument controls the plate shape of the material.
14 Intermediate rolling annealing: carrying out heat treatment and cleaning on an air cushion type continuous annealing furnace, sequentially carrying out alkali washing, annealing, acid washing, grinding and passivation, wherein the furnace temperature of a heating zone is 550 ℃, and the passing speed is 70m/min.
15 Pre-finish rolling: rolling the annealed copper strip in a twenty-high finishing mill: the rolling process is 0.3mm-0.21mm-0.17mm-0.147mm-0.13mm; the rolling speed is 200m/min, the oil temperature is 35-37 ℃, the plasticity of the material can be changed through rolling, and meanwhile, the plate shape of the material is controlled and improved by an online plate shape instrument.
16 Bottom annealing: carrying out heat treatment and cleaning on an air cushion type continuous annealing furnace, sequentially carrying out alkali washing, annealing, acid washing, grinding and passivation, wherein the furnace temperature of a heating zone is 550 ℃, and the passing speed is 100m/min.
17 Finish rolling of finished products: rolling the copper strip subjected to bottom-left annealing in a twenty-high roll finishing mill: the rolling process is 0.13mm-0.092mm-0.075mm-0.063mm-0.055mm-0.05mm; the rolling speed is 80m/min, the oil temperature is 35.6 ℃, and the roller roughness Ra0.15-0.18; controlling the tolerance of the actual plate thickness to be +/-0.001 mm; the on-line monitoring uniformity of the plate type instrument is good.
18 Annealing of finished products: carrying out heat treatment on the finished product of the copper strip after finish rolling on a bell-type furnace, wherein the heat treatment temperature is 200 ℃, and preserving heat for 4 hours; internal stress is released, and the material performance is uniform.
19 Finished product cleaning: cleaning the finished product in a degreasing machine after annealing, wherein the cleaning comprises alkali washing, acid washing, scrubbing and passivation to prevent surface oxidation; naOH solution with the concentration of 2.1 weight percent of alkali liquor used for alkali washing; the acid solution used for acid washing has a concentration of 9.3wt%; the concentration of the passivation solution used for passivation is 0.071wt%; the temperature of the cleaning solution is 75 ℃, and the cleaning speed is 65m/min.
20 Straightening of finished products: and (3) straightening the plate type on stretch bending straightening equipment, wherein the elongation rate is 0.16%, and the plate type defects such as edge wave buckling and the like are improved.
21 Finished product shearing: and (5) shearing the finished copper strip by using shearing equipment according to the same size requirement.
22 Packaging and warehousing: and packaging and warehousing the finished copper strips after the finished copper strips are inspected to be qualified.
The product is detected according to GBT 5231-2012 standard, and the specific detection performance is shown in Table 1:
TABLE 1 Performance index
The product produced by the embodiment has low cost, smooth upper and lower surfaces, high cleanliness and high flatness of the plate surface, the elongation of 6 percent is doubled compared with 3 percent of the traditional product, the plate thickness tolerance of +/-1 mu m overcomes the problem that the plate thickness tolerance of the traditional process is difficult to guarantee, the mechanical property is stable and uniform, and the requirement of customers is met.
The above detailed description of a rolled copper foil and a method for manufacturing the same with reference to examples is illustrative and not restrictive, and several examples may be cited within the scope of the present invention, so that variations and modifications thereof may be made without departing from the spirit of the invention.
Claims (10)
1. The rolled copper foil is characterized by comprising the following chemical components in percentage by weight: 6 to 7 percent of Sn, 0.11 to 0.15 percent of P, less than or equal to 0.14 percent of Fe, less than or equal to 0.04 percent of Zn, less than or equal to 0.02 percent of Ni, less than or equal to 0.004 percent of Al, less than or equal to 0.002 percent of Si, the balance of Cu and inevitable impurities, and the total amount of impurities is less than or equal to 0.1 percent.
2. The rolled copper foil according to claim 1, wherein the rolled copper foil has a tensile strength of 750 to 800MPa, a yield strength of 720 to 750MPa, an elongation of 6% or more, a hardness of 220 to 250HV, a thickness tolerance of. + -. 1 μm, and a roughness of 0.15 to 0.2 μm.
3. The method for producing a rolled copper foil according to claim 1 or 2, characterized by comprising the following steps in this order: the method comprises the following steps of material proportioning, smelting, casting, homogenizing annealing, face milling, cold rolling and cogging, trimming, primary annealing in a bell type furnace, cleaning, roughing in a manufacturing process, secondary annealing in the bell type furnace, cleaning in the manufacturing process, intermediate rolling, annealing in an intermediate rolling process, pre-finishing rolling, bottom annealing, finishing rolling of finished products, annealing of the finished products, cleaning of the finished products, straightening of the finished products and shearing of the finished products.
4. The manufacturing method according to claim 3, wherein in the homogenizing annealing step, the annealing temperature is 600 to 700 ℃, and the holding time is 6 to 10 hours; in the primary annealing step of the bell-type furnace, the annealing temperature is 500-550 ℃, and the heat preservation time is 4-6 h; in the secondary annealing step of the bell-type furnace, the annealing temperature is 450-500 ℃, and the heat preservation time is 4-6 h.
5. The manufacturing method according to claim 3, wherein in the step of intermediate rolling annealing, the annealing temperature is 500-600 ℃, and the passing speed of the copper strip is 50-90 m/min.
6. The manufacturing method according to claim 3, wherein in the bottom-retained annealing step, annealing and cleaning are carried out on an air cushion type continuous annealing furnace, wherein the annealing and cleaning are sequentially carried out by alkali washing, annealing, acid washing, grinding and passivation, the annealing temperature is 500-600 ℃, and the passing speed of the copper strip is 95-105 m/min.
7. The manufacturing method according to claim 3, wherein the total reduction rate in the cold rolling and cogging step is 80 to 85%; the total rolling reduction rate of the rough rolling step is 60-75%; the total reduction rate of the middle rolling step is 60-70%, and the reduction rate distribution of one to four passes is 30-35%, 18-22%, 15-18% and 13-16%; the total reduction rate of the pre-finish rolling step is 50-60%, and the reduction rates of one to four passes are distributed to be 30-32%, 15-20%, 10-15% and 7-12%; the total rolling reduction rate of the finish rolling step is 60-65%, and the rolling reduction rates of one to five passes are 28-30%, 15-20%, 15-18%, 10-15% and 7-12%.
8. The manufacturing method according to claim 3, wherein cold rolling cogging and roughing rolling are performed on a four-high mill; the middle rolling is carried out on a six-roller mill; pre-finish rolling and finished product finish rolling are both carried out on a twenty-high roll finishing mill; the rolling speed of the pre-finish rolling is 190-210 m/min.
9. The manufacturing method according to claim 3, wherein in the intermediate rolling and pre-finish rolling steps, an online plate shape instrument is used for controlling and lifting the plate shape of the material; the pre-finish rolling has a rolling speed of 190-210 m/min.
10. The manufacturing method according to claim 3, wherein a rolling speed of the finish rolling of the finish product is 100 to 150m/min, and a roughness Ra of a roll at the finish rolling of the finish product is 0.15 to 0.18 μm; and (3) controlling the thickness tolerance of the plate to be +/-0.001 mm through online monitoring of an X-ray thickness gauge during finish rolling of a finished product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211357641.3A CN115896533B (en) | 2022-11-01 | 2022-11-01 | Rolled copper foil and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211357641.3A CN115896533B (en) | 2022-11-01 | 2022-11-01 | Rolled copper foil and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN115896533A true CN115896533A (en) | 2023-04-04 |
| CN115896533B CN115896533B (en) | 2024-04-05 |
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