CN109226323A - A kind of cold rolling heat treatment process of tab copper strips - Google Patents
A kind of cold rolling heat treatment process of tab copper strips Download PDFInfo
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- CN109226323A CN109226323A CN201811057603.XA CN201811057603A CN109226323A CN 109226323 A CN109226323 A CN 109226323A CN 201811057603 A CN201811057603 A CN 201811057603A CN 109226323 A CN109226323 A CN 109226323A
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/46—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting
- B21B1/463—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling metal immediately subsequent to continuous casting in a continuous process, i.e. the cast not being cut before rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P23/00—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass
- B23P23/04—Machines or arrangements of machines for performing specified combinations of different metal-working operations not covered by a single other subclass for both machining and other metal-working operations
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
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- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Optics & Photonics (AREA)
- Metal Rolling (AREA)
Abstract
The invention discloses a kind of cold rolling heat treatment process of tab copper strips, belong to non-ferrous metal copper rolling and technical field of heat treatment field.The present invention includes the following steps: to roll → (9) double annealing → (10) secondary cleaning → (11) finish rolling → (12) air cushion furnace annealing cleaning → (13) stretch-bending straightening → (14) cutting delivery in primary cleaning → (8) in primary annealing → (7) in (1) melting cast → (2) hot rolling → (3) Milling Process → (4) roughing → (5) trimming → (6).The present invention is used to improve the warping resistance performance of tab copper strips, and finished product Vickers hardness obtained is 50-55HV, and bending times >=7 meet requirement of the invention.
Description
Technical field
The present invention relates to non-ferrous metal copper rolling and technical field of heat treatment, more specifically to a kind of tab copper strips
Cold rolling heat treatment process.
Background technique
Currently, lithium ion battery can be filled since energy density per unit volume and specific energy are high in the chargeable battery of commercialization
And it is pollution-free, have three big features of present battery industrial development, therefore have faster growth in most countries in the world,
China is also in the technical research of Efforts To Develop lithium battery.
Tab is a kind of raw material of lithium ion polymer battery product.Battery divides positive and negative anodes, and tab is exactly from battery core
The metallic conductor that positive and negative anodes are extracted, the popular ear for saying battery positive and negative polarities are the contacts when carrying out charge and discharge
Point.This contact point be not we have seen that battery appearance that copper sheet, but a kind of connection of inside battery.Tab is made
For the core component of lithium battery, the quality for manufacturing raw material high-performance copper band directly affects battery efficiency, heat dissipation etc.,
Connect the operational safety for being related to the equipment such as mobile phone, notebook and new-energy automobile.
The nickel-clad copper carrying material of tab metallic conduction matrix can be related to multiple curved in the process that battery assembles
Folding, there is no unified standard, different enterprises to have made internal rules respectively to its warping resistance number for bending times, raw by tradition
The limitation of the rolling mill practice and annealing process of production. art, bending times are more universal at 3 times or so in industry.
The vickers hardness hv 50-55 of this enterprise requirements copper strips, bending times >=7, if traditionally produced,
It is excessively high or unstable to will lead to finished material hardness number, can not be tested by buckling performance.
104357771 B of China Patent No. ZL, authorized announcement date on February 22nd, 2017, invention and created name are as follows: a kind of
The cold rolling heat treatment process for improving almag buckling performance, this application discloses a kind of improvement almag buckling performances
Cold rolling heat treatment process belongs to metal material rolling and technical field of heat treatment, for improving the buckling performance of almag.It should
The technical solution of application case are as follows: the smelting acquisition aluminium alloy of almag raw material, aluminium alloy is refined, degasification, skim, filter after
Strip blank material is made in direct high speed continuously casting, hot continuous rolling, and strip blank is again through cold rolling, intermediate annealing, finish rolling, finished products system
At almag strip finished product.The cold rolling specifically: strip blank is rolled to through three passage cold rollings to the plate with a thickness of 1.3mm
Band guarantees draught per pass 30 ± 5%；The intermediate annealing uses homogenizing annealing mode, specifically: after cold rolling
Gained Strip keeps the temperature 8-10 hours under the conditions of 480 DEG C -510 DEG C, then comes out of the stove and is air-cooled to room temperature；The finish rolling is specific
Are as follows: the Strip Jing Guo intermediate annealing process is directly rolled to thick 1.1mm；The finished products specifically: by the plate after finish rolling
Band keeps the temperature 2-3 hours under the conditions of 170-190 DEG C, then comes out of the stove and is air-cooled to room temperature.
This application improves the buckling performance of aluminium-magnesium alloy sheet finished product, but this application only acts as almag
With cannot apply in the production technology of copper strips.Therefore, how existing production technology is improved, to improve copper strips
Warping resistance performance realizes that the production domesticization of high-quality tab copper strips is significantly.
Summary of the invention
Technical problems to be solved by the inivention
The invention solves purpose be finished product hardness when tab copper strips being overcome to be produced according to existing traditional production technology
Index is excessively high or unstable, can not be tested by buckling performance, provides a kind of cold rolling heat treatment process of tab copper strips, adopts
With technical solution of the present invention, performance can be obtained uniformly and meet the present invention claims tab copper strips.
Technical solution
In order to achieve the above objectives, technical solution provided by the invention are as follows: a kind of cold rolling heat treatment process of tab copper strips, including such as
Lower step:
(1) melting cast: using the catholyte copper of purity > 99.9% as raw material, impurity phosphorus content≤0.003% is controlled, is led to
It crosses stirring, fishing slag, ingredient after the assay was approved, adjusts melting copper coolant-temperature gage to 1180 DEG C -1200 DEG C, carry out cast, obtain 260mm
Thick ingot casting；
(2) hot rolling: the ingot casting of 260mm thickness in step (1) is put into heating 5 hours in heating furnace, ingot casting temperature reaches 880
After DEG C -920 DEG C, multi- pass rolling, mill speed 100m/min-120m/min, hot-rolling mill specification are carried out into two roller hot-rolling mills
For φ 650*650mm；
(3) Milling Process: milling will be carried out to its upper and lower surface using milling machine with a thickness of the made-up belt of 17mm after hot rolling in step (2)
Processing, Milling Speed 3-5m/min sufficiently mill oxide skin, milling rear surface roughness Ra≤1.5 μm；
(4) roughing: the made-up belt in step (3) after milling carries out multi-pass roughing, unloads volume, roughing mill specification after being rolled down to 1.5mm
For φ 250/450*500mm；
(5) trimming: carrying out trimming after roughing, cuts off band both sides defect part, controls trimming speed 50-60m/min；
(6) primary annealing: the 1.5mm copper volume after trimming in step (5) is put into bell furnace, and is placed in bell furnace top layer area
Domain, annealing temperature are 460 DEG C -480 DEG C, then keep the temperature 5 hours, and room temperature taking-up is furnace-cooled to after heat preservation；
(7) primary cleaning: the band volume after once annealing in step (6) is successively using pickling → clear water flushing → polishing → hot water punching
Washing → passivation →, the mode dried → wound is handled；
(8) roll in: the band volume after once cleaning in step (7) carries out multi- pass rolling, is rolled down to a thickness of volume is unloaded after 0.6mm,
Middle milling train specification is φ 260/450*500mm, gloss level of roll Ra≤0.25 μm；
(9) double annealing: in the band volume investment bell furnace after rolling in step (8), and bell furnace top layer regions are placed in, annealed
Temperature is 360 DEG C -380 DEG C, keeps the temperature 4.5 hours, and room temperature taking-up is furnace-cooled to after heat preservation；
(10) secondary cleaning: the band volume in step (9) after annealing successively uses pickling → clear water flushing → polishing → hot water injection
→ passivation → drying → winding mode is handled；
(11) finish rolling: the band volume in step (10) after secondary cleaning carries out multi- pass rolling, unloads volume, finish rolling after being rolled down to 0.3mm
Using full oil rolling, gloss level of roll Ra≤0.15 μm；
(12) air cushion furnace annealing cleans: final thickness is the band volume of 0.3mm in step (11), is placed in air cushion furnace and carries out online
Annealing cleaning, 650 DEG C -680 DEG C of annealing temperature, the equipment speed of service is 45m/min-55m/min, rotation speed of fan 900-
1000r/min。
(13) stretch-bending straightening: being rectified by the way of jockey pulley and bending straightening roller with volume after cleaning in step (12)
Directly；
(14) cutting is delivered.
As further improvement of the present invention, in step (6), cold furnace includes air-cooled and water cooling, air-cooled to turn water cooling temperature
Point is set as 280 DEG C, tapping temperature≤70 DEG C.
As further improvement of the present invention, in step (9), cold furnace includes air-cooled and water cooling, air-cooled to turn water cooling temperature
Point is set as 200 DEG C, tapping temperature≤60 DEG C.
As further improvement of the present invention, in step (7), pickling uses sulfuric acid washing, and h 2 so 4 concentration is
10%-12% is polished using 240 mesh sub-thread wire brush, is brushed again, and bristle material is silicon carbide, and polishing revolving speed is 600 r/min, cleaning
Speed is 30-50m/min.
As further improvement of the present invention, in step (10), pickling uses sulfuric acid washing, and h 2 so 4 concentration is
8%-10%；It is polished using 1000 mesh multiply wire brush, bristle material is aluminium oxide, and polishing revolving speed is 900 r/min, and cleaning speed is
60-80m/min；Temperature is used to carry out hot water injection for 70 DEG C -80 DEG C of water；It is passivated using liquid passivator.
As further improvement of the present invention, in step (13), the jockey pulley totally eight, diameter 500mm, between roller
Maximum tension 58KN；Bending straightening is aligned using 23 roller of sixfold formula, and aligning roller diameter is 16mm, band volume elongation control in aligning
In 0.16%-0.18%, band volume aligning speed is 120m/min.
Beneficial effect
Using technical solution provided by the invention, compared with prior art, there is following remarkable result:
(1) the cold rolling heat treatment process of a kind of tab copper strips provided by the invention, working modulus is bigger, the processing hardening phenomenon of material
It is more obvious, in order to eliminate processing hardening, the performance requirement of rolling mill practice and product in combination with tab copper strips, once when annealing
It is 460 DEG C -480 DEG C, 130 DEG C/h of heating rate that copper, which rolls up annealing temperature, then keeps the temperature 5 hours, after heat preservation, is furnace-cooled to room temperature
It takes out.Copper volume annealing temperature is 360 DEG C -380 DEG C when double annealing, keeps the temperature 4.5 hours, room temperature is furnace-cooled to after heat preservation and is taken
Out.Wherein, the copper volume is located in the top layer regions of bell furnace, it is therefore intended that move back in the region in this twice annealing
Effect is good afterwards, and the properties of product of acquisition are uniform.Temperature is high when annealing, and soaking time is long, and metal occurs recovery and recrystallization and relatively fills
Point, processing hardening can be eliminated safely, and the processing for improving tab copper strips in the plasticity present invention cooperates annealing process, can be met
It is required that product.
(2) the cold rolling heat treatment process of a kind of tab copper strips provided by the invention, third time annealing be in air cushion furnace into
Capable online annealing cleaning, is in the placement form that web-like is stacked different from band in bell furnace, band is complete in air cushion furnace
It is open and flat to open, thus in annealing, it is ensured that each surface uniform force of band, heat transfer uniformly, the direction of heat flow that is subject to
Unanimously, the shortcomings that annealing is uneven, product surface is easy adhesion is overcome, while directly carrying out cleaning and quickly after high annealing
Cooling, cleaning process, surface is not brushed, it is ensured that does not cause defect to copper strip surface.Core ensures that copper strips product is not in annealing process
There is serious bonding, and edge without impression, touch the defects of pounding, while observing the oxidation feelings that copper strips band is rolled up under different tapping temperatures
Condition；Rapid cooling after annealing at a high temperature farthest guarantees the stability of copper strips performance and the finish on surface, the above process
It ensure that finished product Vickers hardness is 50-55HV, bending times >=7 reach the purpose of the present invention.
(3) the cold rolling heat treatment process of a kind of tab copper strips of the invention, the scientific rolling for defining tab copper strips
And annealing process, the properties of product and quality for being compared to similar producer are significantly improved, by this technological invention at
Fruit is applied in tab copper strips production technology, effectively raises product quality, improves lumber recovery, has saved cost.
Detailed description of the invention
Nothing.
Specific embodiment
To further appreciate that the contents of the present invention, the present invention is described in detail in conjunction with the embodiments.
Embodiment 1
The present invention provides a kind of cold rolling heat treatment process of tab copper strips, and by the technique, can obtain Vickers hardness is 50-
55HV, the tab copper strips of bending times >=7, copper content > 99.95%, phosphorus content≤0.003%, iron content≤0.005%, lead
Content≤0.005%.
A kind of cold rolling heat treatment process of tab copper strips, comprises the following steps: (1) melting cast → (2) hot rolling → (3) milling
Cut processing → (4) roughing → (5) trimming → (6) once annealing → (7) once cleaning → (8) in roll → (9) double annealing →
(10) secondary cleaning → (11) finish rolling → (12) air cushion furnace annealing cleaning → (13) stretch-bending straightening → (14) cutting is delivered.
Step (1) melting cast: using the catholyte copper of purity > 99.9% as raw material, guarantee copper degree of purity, control
Impurity phosphorus content≤0.003% adjusts melting copper coolant-temperature gage to 1180 DEG C -1200 by stirring, fishing out slag, ingredient after the assay was approved
DEG C or so, cast is carried out, the ingot casting of 260mm thickness is obtained；During cast, temperature cannot be excessively high, is easy to produce shrinkage cavity, influences
Ingot quality, while controlling pulling rate and hydraulic pressure, it is ensured that the defects of uniformity of crystal grain is without pipe segregation, in order to guarantee slab matter
Amount needs to cover copper water using carbon black, guarantees that cc billet surface quality, no slag inclusion, stomata etc. are abnormal.
Step (2) hot rolling: the ingot casting of 260mm thickness in step (1) is put into heating 5 hours, ingot casting temperature in heating furnace
After reaching 880 DEG C -920 DEG C, multi- pass rolling, mill speed 100m/min-120m/min, hot rolling are carried out into two roller hot-rolling mills
Machine specification is φ 650*650mm, and hot-rolling mill is cooling cooling using emulsion, and finishing temperature is kept to quench at 600 DEG C or more, and quickly
Fire realizes effectively solid solution, the comprehensive performance of material can be improved.
Step (3) Milling Process: milling machine will be used to its upper and lower surface with a thickness of the made-up belt of 17mm after hot rolling in step (2)
Milling Process is carried out, Milling Speed 3-5m/min sufficiently mills oxide skin, milling rear surface roughness Ra≤1.5 μm.
Step (4) roughing: the made-up belt in step (3) after milling carries out multi-pass roughing, unloads volume after being rolled down to 1.5mm, slightly
Milling train specification is φ 250/450*500mm, and roughing mill uses emulsion lubrication.Normally for base, surface is raw by high request for roughing workshop section
It produces, keep under strict control polishing print, black silk, peeling, while focusing on the craft sanitary of equipment Yu band contact site.
Step (5) trimming: the copper strips after step (4) roughing carries out trimming, cuts off band both sides defect part, trimming speed
50-60m/min。
Step (6) is once annealed: i.e. cover annealing, 1.5mm copper is rolled up in investment bell furnace, and be placed in bell-type furnace roof
Layer region, annealing temperature are 460 DEG C -480 DEG C, 130 DEG C/h of heating rate, then keep the temperature 5 hours, after heat preservation, are furnace-cooled to
Room temperature takes out.It needs to be illustrated, it is the combination cooling mode of the air-cooled and water cooling carried out in bell furnace, first wind that furnace is cold
It is cooled to after certain temperature water cooling again, the air-cooled water cooling temperature spot that turns sets 280 DEG C, tapping temperature≤70 DEG C.
Step (7) is once cleaned: the band volume after once annealing in step (6) successively uses pickling → clear water flushing → polishing
→ hot water injection → passivation → drying → winding mode is handled；Wherein, using sulfuric acid washing, h 2 so 4 concentration is
10%-12%；It is polished using 240 mesh sub-thread wire brush, is brushed again, bristle material is silicon carbide, and polishing revolving speed is 600 r/min, cleaning
Speed is 30-50m/min.
Step is rolled in (8): the band volume after once cleaning in step (7) carries out multi- pass rolling, is rolled down to a thickness of 0.6mm
After unload volume, middle milling train specification is φ 260/450*500mm, is rolled using full oil, gloss level of roll≤0.25 μm, guarantees that template is flat
Directly.
Step (9) double annealing: i.e. cover annealing, in step (8) in roll after band volume investment bell furnace in, and place
In bell furnace top layer regions, annealing temperature is 360 DEG C -380 DEG C, keeps the temperature 4.5 hours, and room temperature taking-up is furnace-cooled to after heat preservation；
It needs to be illustrated, it is the combination cooling mode of the air-cooled and water cooling carried out in bell furnace that furnace is cold, first air-cooled to certain
Water cooling, the air-cooled water cooling temperature spot that turns set 200 DEG C again after temperature, tapping temperature≤60 DEG C.
Step (10) secondary cleaning: the band volume in step (9) after double annealing successively uses pickling → clear water flushing → throwing
Light → hot water injection → passivation → drying → winding mode is handled；Wherein, using sulfuric acid washing, h 2 so 4 concentration is
8%-10%；It is polished using 1000 mesh multiply wire brush, bristle material is aluminium oxide, and polishing revolving speed is 900 r/min, and cleaning speed is
60-80m/min；Temperature is used to carry out hot water injection for 70 DEG C -80 DEG C of water；It is passivated using liquid passivator.Need into
Row illustrates that in this step, bristle material uses aluminium oxide, because of table of the aluminium oxide for silicon carbide, after polishing
Face finish is higher.
Step (11) finish rolling: the band volume in step (10) after secondary cleaning carries out multi- pass rolling, unloads after being rolled down to 0.3mm
Volume, finish rolling ensure that template is straight using full oil rolling, gloss level of roll≤0.15 μm, core, it is ensured that tolerance is qualified.
The cleaning of step (12) air cushion furnace annealing: the band volume in step (11) after finish rolling with a thickness of 0.3mm is placed in air cushion furnace
Interior progress online annealing cleaning, 650 DEG C -680 DEG C or so of annealing temperature, the equipment speed of service is 45m/min-55m/min, blower
Revolving speed is 900-1000r/min.
Step (13) stretch-bending straightening: the band in step (12) after cleaning roll up by the way of jockey pulley and bending straightening roller into
Row aligning；Wherein, jockey pulley totally eight, diameter 500mm, maximum tension 58KN between roller；Bending straightening uses 23 roller of sixfold formula
Aligning, aligning roller diameter are 16mm, and for band volume elongation control in 0.16%-0.18%, band volume aligning speed is 120m/ in aligning
min。
Step (14) cutting is delivered: the band volume after leveling in step (13) being carried out cutting delivery, completes whole process.
From 260mm ingot casting, be hot-rolled down to the made-up belt of thickness 17mm, the copper volume of roughing to 1.5mm, in be rolled to the copper volume of 0.6mm,
The copper of last finish rolling to 0.3mm are rolled up.Working modulus is bigger, and the processing hardening phenomenon of material is more obvious, in order to eliminate processing hardening, together
When in conjunction with the rolling mill practice of tab copper strips and the performance requirement of product, copper volume annealing temperature is 460 DEG C -480 DEG C when primary annealing,
Then 130 DEG C/h of heating rate keeps the temperature 5 hours, after heat preservation, be furnace-cooled to room temperature taking-up.Copper volume annealing temperature when double annealing
Degree is 360 DEG C -380 DEG C, keeps the temperature 4.5 hours, and room temperature taking-up is furnace-cooled to after heat preservation.Wherein, the copper is rolled up moves back twice at this
It in fire, is located in the top layer regions of bell furnace, it is therefore intended that the region steps back that effect is good, and the properties of product of acquisition are equal
It is even.Temperature is high when annealing, and soaking time is long, and metal generation recovery and recrystallization is more abundant, can eliminate processing hardening safely, improves
Plasticity, the present invention in tab copper strips processing cooperate annealing process, satisfactory product can be obtained.
Third time annealing is the online annealing cleaning carried out in air cushion furnace, is different from band in bell furnace and stacks in web-like
Placement form, band in air cushion furnace completely it is open and flat opens, thus annealing when, it is ensured that each surface stress of band
Uniformly, the direction of heat flow that heat transfer is uniform, is subject to is consistent, overcomes the shortcomings that annealing is uneven, product surface is easy adhesion, together
When high annealing after directly cleaned and be quickly cooled down, cleaning process, surface is not brushed, it is ensured that does not cause to lack to copper strip surface
It falls into.Core ensure annealing process in copper strips product do not occur being seriously bonded, and edge without impression, touch the defects of pounding, observe simultaneously
The oxidization condition that copper strips band is rolled up under different tapping temperatures；Rapid cooling after annealing at a high temperature farthest guarantees copper strips performance
Stability and surface finish, the above process ensure that finished product Vickers hardness is 50-55HV, and bending times >=7 reach this
The purpose of invention.
Above by the reasonable set to parameter and annealing, guarantee that all copper strips are heated evenly, strict control crystal grain is big
It is small, it is ensured that crystal grain rounding uniformity improves the comprehensive performance of copper strips.
A kind of cold rolling heat treatment process of tab copper strips proposed by the present invention, the scientific rolling for defining tab copper strips
And annealing process, the properties of product and quality for being compared to similar producer are significantly improved, by this technological invention at
Fruit is applied in tab copper strips production technology, effectively raises product quality, improves lumber recovery, has saved cost.
Schematically the present invention and embodiments thereof are described above, description is not limiting.So if
Those of ordinary skill in the art are inspired by it, without departing from the spirit of the invention, not inventively designs
Frame mode similar with the technical solution and embodiment out, are within the scope of protection of the invention.
Claims (6)
1. a kind of cold rolling heat treatment process of tab copper strips, characterized by the following steps:
(1) melting cast:
Using the catholyte copper of purity > 99.9% as raw material, control impurity phosphorus content≤0.003%, by stir, fish out slag,
Ingredient after the assay was approved, adjusts melting copper coolant-temperature gage to 1180 DEG C -1200 DEG C, carries out cast, obtain the ingot casting of 260mm thickness；
(2) hot rolling:
The ingot casting of 260mm thickness in step (1) is put into heating 5 hours in heating furnace, ingot casting temperature reaches 880 DEG C -920 DEG C
Afterwards, multi- pass rolling, mill speed 100m/min-120m/min are carried out into two roller hot-rolling mills, hot-rolling mill specification is φ 650*
650mm；
(3) Milling Process:
Milling Process, milling speed will be carried out to its upper and lower surface using milling machine with a thickness of the made-up belt of 17mm after hot rolling in step (2)
Degree is 3-5m/min, sufficiently mills oxide skin, milling rear surface roughness Ra≤1.5 μm；
(4) roughing:
Made-up belt in step (3) after milling carries out multi-pass roughing, unloads volume after being rolled down to 1.5mm, roughing mill specification is φ 250/
450*500mm；
(5) trimming:
Trimming is carried out after roughing, cuts off band both sides defect part, controls trimming speed 50-60m/min；
(6) primary annealing:
1.5mm copper volume after trimming in step (5) is put into bell furnace, and is placed in bell furnace top layer regions, annealing temperature
It is 460 DEG C -480 DEG C, then keeps the temperature 5 hours, room temperature taking-up is furnace-cooled to after heat preservation；
(7) primary cleaning:
Band volume after once annealing in step (6) successively uses pickling → clear water flushing → polishing → hot water injection → passivation → baking
The mode of dry → winding is handled；
(8) it is rolled in:
Band volume after once cleaning in step (7) carries out multi- pass rolling, is rolled down to a thickness of volume, middle milling train rule are unloaded after 0.6mm
Lattice are φ 260/450*500mm, gloss level of roll Ra≤0.25 μm；
(9) double annealing:
In band volume investment bell furnace after rolling in step (8), and bell furnace top layer regions being placed in, annealing temperature is 360 DEG C-
380 DEG C, 4.5 hours are kept the temperature, room temperature taking-up is furnace-cooled to after heat preservation；
(10) secondary cleaning:
Band volume in step (9) after double annealing successively uses pickling → clear water flushing → polishing → hot water injection → passivation → baking
The mode of dry → winding is handled；
(11) finish rolling:
Band volume in step (10) after secondary cleaning carries out multi- pass rolling, unloads volume after being rolled down to 0.3mm, finish rolling is rolled using full oil
System, gloss level of roll Ra≤0.15 μm；
(12) air cushion furnace annealing cleans:
The band volume that final thickness is 0.3mm in step (11), is placed in air cushion furnace and carries out online annealing cleaning, annealing temperature
650 DEG C -680 DEG C, the equipment speed of service is 45m/min-55m/min, rotation speed of fan 900-1000r/min；
(13) stretch-bending straightening:
Being aligned by the way of jockey pulley and bending straightening roller with volume after cleaning in step (12)；
(14) cutting is delivered.
2. a kind of cold rolling heat treatment process of tab copper strips according to claim 1, it is characterised in that: in step (6), the cold packet of furnace
Air-cooled and water cooling is included, the air-cooled water cooling temperature spot that turns is set as 280 DEG C, tapping temperature≤70 DEG C.
3. a kind of cold rolling heat treatment process of tab copper strips according to claim 1, it is characterised in that: in step (9), the cold packet of furnace
Air-cooled and water cooling is included, the air-cooled water cooling temperature spot that turns is set as 200 DEG C, tapping temperature≤60 DEG C.
4. a kind of cold rolling heat treatment process of tab copper strips according to claim 1, it is characterised in that: in step (7), pickling is adopted
With sulfuric acid washing, h 2 so 4 concentration 10%-12% is polished using 240 mesh sub-thread wire brush, is brushed again, and bristle material is silicon carbide,
Polishing revolving speed is 600 r/min, cleaning speed 30-50m/min.
5. a kind of cold rolling heat treatment process of tab copper strips according to claim 1, it is characterised in that: in step (10), pickling
Using sulfuric acid washing, h 2 so 4 concentration 8%-10%；It is polished using 1000 mesh multiply wire brush, bristle material is aluminium oxide, is thrown
Light revolving speed is 900 r/min, cleaning speed 60-80m/min；Temperature is used to carry out hot water injection for 70 DEG C -80 DEG C of water；It adopts
It is passivated with liquid passivator.
6. a kind of cold rolling heat treatment process of tab copper strips according to claim 1, it is characterised in that: described in step (13)
Jockey pulley totally eight, diameter 500mm, maximum tension 58KN between roller；Bending straightening is aligned using 23 roller of sixfold formula, and straightening roll is straight
Diameter is 16mm, and for band volume elongation control in 0.16%-0.18%, band volume aligning speed is 120m/min in aligning.
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| CN112296117A (en) * | 2020-08-29 | 2021-02-02 | 安徽楚江科技新材料股份有限公司 | Red copper strip rolling process |
| CN113083897A (en) * | 2021-04-07 | 2021-07-09 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
| CN113083891A (en) * | 2021-03-29 | 2021-07-09 | 安徽楚江科技新材料股份有限公司 | Copper strip rolling production process flow |
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| CN110253229A (en) * | 2019-07-12 | 2019-09-20 | 姹や寒 | A kind of allowance control method of degree of precision copper strips |
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| CN113088653A (en) * | 2021-04-02 | 2021-07-09 | 安徽楚江科技新材料股份有限公司 | Production process of large-size automobile parts |
| CN113083897A (en) * | 2021-04-07 | 2021-07-09 | 太原晋西春雷铜业有限公司 | Preparation method of high-uniformity surface of copper or copper alloy strip |
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| CN113953318A (en) * | 2021-08-30 | 2022-01-21 | 江苏圣珀新材料科技有限公司 | Plate shape control method for thin strip cold rolling |
| CN113953318B (en) * | 2021-08-30 | 2024-04-16 | 江苏圣珀新材料科技有限公司 | Plate shape control method for cold rolling processing of 4J36 thin strip material for LNG liquefied petroleum gas ship |
| CN114273424A (en) * | 2021-12-28 | 2022-04-05 | 安徽永杰铜业有限公司 | Superhard copper foil for heat exchanger fin and production process thereof |
| CN114273424B (en) * | 2021-12-28 | 2024-06-07 | 安徽永杰铜业有限公司 | Superhard copper foil for heat exchanger fin and production process thereof |
| CN115921571A (en) * | 2022-12-19 | 2023-04-07 | 富威科技（吴江）有限公司 | Rolled copper foil and manufacturing method thereof |
| CN115921571B (en) * | 2022-12-19 | 2024-01-09 | 江苏富威科技股份有限公司 | Rolled copper foil manufacturing method and rolled copper foil |
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Application publication date: 20190118 |