CN107983788A - Multi-pass is continuously extruded to prepare high-purity high method for leading copper strips - Google Patents
Multi-pass is continuously extruded to prepare high-purity high method for leading copper strips Download PDFInfo
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- CN107983788A CN107983788A CN201711248519.1A CN201711248519A CN107983788A CN 107983788 A CN107983788 A CN 107983788A CN 201711248519 A CN201711248519 A CN 201711248519A CN 107983788 A CN107983788 A CN 107983788A
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Classifications
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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
- B21C23/00—Extruding metal; Impact extrusion
- B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
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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
-
- 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
Abstract
High-purity high method for leading copper strips is prepared the invention discloses multi-pass is continuously extruded, is comprised the technical steps that：Continuous up-casting-continuously extruded-continuously extruded for the second time-continuously extruded-rolling-annealing-Cleaning and Passivation-the cutting of third time：High-purity high its copper content of copper strips of leading prepared by above-mentioned processing step is more than 99.99%, and oxygen content is less than 5ppm, and conductivity is more than 102.5%IACS, tensile strength 250MPa 260MPa, and elongation percentage is more than 60%.
Description
Technical field
The present invention relates to technical field of nonferrous metal processing, more particularly to a kind of multi-pass is continuously extruded prepares high-purity high lead
The method of copper strips.
Background technology
Electron tube has in fields such as radar communication system, electrical equipment, image device and sensitive detection parts widely should
With.Electron tube material is the material base of electron tube technology development, and whether the technical indicator of electron tube is advanced,
Can the quality of product be guaranteed, and in addition to design, manufacturing process, the performance of material is also a key factor, and often
It is deciding factor.
Copper and copper alloy have the features such as highly conductive, heat conductivility, and good ductility, easy to process, Er Qiezhen
Empty sealing performance is excellent, though very it is thin will not gas leakage, it is particularly important that this is to electron tube.In addition, copper and copper alloy also have
There is excellent welding performance, nearly all liquid solder well can soak its surface, and without nickel plating.Therefore,
Copper and copper alloy are one of widely used metal materials of electron tube.
Electron tube generally uses following manufacturing technique method with high-purity oxygen-free high conductivity type copper strip：
Vacuum drying oven melting-ingot casting-heating-hot rolling-milling face-roughing-in roll-- finish rolling-annealing-of annealing is clear
Wash passivation-cutting
There are scale of investment is big, lumber recovery is low, product length has for traditional electron tube oxygen-free copper stripe production technology
The shortcomings of limit, low production efficiency, energy consumption are big, product oxygen content is unstable.
The content of the invention
To solve the above-mentioned technical problem of the prior art, the object of the present invention is to provide a kind of continuously extruded preparation of multi-pass
High-purity high method for leading copper strips, the copper strips that is produced using present invention process it is conductive can it is high, oxygen content is low, consistency is high,
The advantages of plastic deformation ability is high, surface quality is high.
To reach above-mentioned purpose, the present invention is achieved by the following technical solutions：
Multi-pass is continuously extruded to prepare high-purity high method for leading copper strips, comprises the technical steps that：Continuous up-casting-continuous
Extruding-continuously extruded for the second time-continuously extruded-rolling-annealing-Cleaning and Passivation-the cutting of third time.
(1) continuous up-casting：Using Cu-CATH-1 as raw material, will be carried out after Cu-CATH-1 pre-heating drying in smelting apparatus
Fusing, using charcoal and graphite flakes covering copper liquid surface, and through online degasification, deoxidation, stirring, then using on traction link seat
Draw copper bar.
Smelting apparatus includes smelting furnace, holding furnace, compartment is equipped between melting furnace and holding furnace, compartment is by being arranged in order
The first compartment, the second compartment, the 3rd compartment composition, be connected between melting furnace, compartment and holding furnace by flowing ditch, stream ditch be higher by
Furnace bottom 150mm, can promote the uniformity of copper liquid flowing, can play the effect of slagging-off.It is provided with the second compartment and removes online
Device of air, 99.996% argon gas is filled with by online depassing unit into copper liquid, and by controlled rotation graphite shaft and is turned
Son, the argon gas of metering is pressed into copper liquid and is dispersed as micro-bubble, it is uniformly dispersed in copper liquid, is removed so as to reach
Gas, the purpose of deoxidation, source outlet pressure 0.3MPa, 1.5~2.0Nm of flow3/ h, rotor speed control is in 100~120r/
min.Online depassing unit is installed in the second compartment, is connected by the stream ditch of the first compartment, the second compartment, the 3rd compartment,
It can not only ensure sufficient degasification and deoxidation effect, it can also be ensured that the stability of holding furnace liquid level.
The control of crystallizer leaving water temperature is at 35 DEG C~40 DEG C, and the temperature of smelting furnace is 1150 DEG C~1155 DEG C, using drying
Charcoal covering, ensure the reducing atmosphere of smelting furnace；Charcoal granularity is 40mm~50mm, cladding thickness 120mm~150mm, is protected
The temperature of warm stove is 1145 DEG C~1150 DEG C, is covered using graphite flakes, its cladding thickness 30mm~35mm.On draw copper shank diameter
For 30mm, it is ceramic material above to draw the crystallizer that copper bar uses, meanwhile, crystallizer surface chromium plating, the thickness of chrome layer is 0.05
~0.1mm；Foam ceramic filter device is installed in crystallizer front end, foam ceramic filter device is using rich alumina silicate as core, with boron
Glass is the filtration apparatus of shell, its chemical composition is 30~60% alundum (Al2O3)s, 30~60% silica, 5~25% 3
Two boron are aoxidized, the porosity of foam ceramic filter device is between 66~70%.
Draw its copper content of copper bar on preparing more than 99.99%, oxygen content is less than 5ppm, and conductivity is more than 102%IACS,
Tensile strength is more than 190MPa, and elongation percentage is more than 40%.
(2) it is continuously extruded：The copper bar prepared using continuous up-casting prepares copper rod, continuously as raw material using continuously extruded unit
Extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 0.9mm, and continuously extruded extrusion temperature is more than 700 degree, crowded
Pressure pressure is more than 1000MPa, and die for continuously extruding thickness is 20mm, spacer thickness 70mm, continuously extruded to prepare the straight of copper rod
Footpath is 30mm, grain size 0.08-0.12mm, and the tensile strength of copper rod is more than 220MPa, and elongation percentage is more than 50%.
(3) it is continuously extruded for the second time：Continuous extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 1.1mm,
Continuously extruded extrusion temperature is more than 700 degree, and squeeze pressure is more than 1000MPa, and die for continuously extruding thickness is 20mm, and gasket is thick
Spend and be more than for 70mm, the continuously extruded a diameter of 30mm for preparing copper rod, grain size 0.02-0.07mm, the tensile strength of copper rod
230MPa, elongation percentage are more than 55%.
(4) third time is continuously extruded：Continuous extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 1.2mm,
Continuously extruded extrusion temperature is more than 700 degree, and squeeze pressure is more than 1000MPa, and die for continuously extruding thickness is 50mm, and gasket is thick
It is 10mm × 350mm, grain size 0.002-0.01mm to spend for 50mm, the continuously extruded size for preparing made-up belt, and copper strip billet resists
Tensile strength is more than 250MPa, and elongation percentage is more than 60%.
(5) continuous rolling：Copper strip billet is carried out by multi- pass rolling, pass reduction 45%-50%, by copper using milling train
With continuous rolling to thickness 0.3mm.
(6) anneal：Using gas shield bright annealing equipment, the copper strips after rolling is annealed, annealing temperature 300
DEG C -350 DEG C, when the time 5 is small.
(7) Cleaning and Passivation：Copper strips after annealing is subjected to Cleaning and Passivation；
(8) cut：Copper strips is cut using cutting apparatus；
The copper strips copper content of preparation is more than 99.99%, and oxygen content is less than 5ppm, and conductivity is more than 102.5%IACS, tension
Intensity 250MPa-260MPa, elongation percentage are more than 60%.
Beneficial effects of the present invention are as follows：
1. using the continuously extruded method of multi-pass, the copper strips dense structure of preparation, tiny, mechanical property, electric property
It is excellent.
2. using Cu-CATH-1 as raw material, by techniques such as continuous up-casting, degasification, use purity height, the oxygen of preparation contain
Measure low；Using the copper strip billet not milling face of continuously extruded preparation, multi- pass rolling is directly carried out, it is middle unannealed, it is energy-efficient.
It is 3. big using processing step, the copper strips of preparation, copper contents such as continuous up-casting, multi-pass extruding, continuous rolling, annealing
In 99.99%, oxygen content is less than 5ppm, and conductivity is more than 102.5%IACS, tensile strength 250MPa-260MPa, and elongation percentage is big
In 60%, technical requirements of the high-end fields such as electron tube to high-purity oxygen-free high conductivity type copper strip are met.
Embodiment
With reference to specific embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to
This.
Multi-pass is continuously extruded to prepare high-purity high method for leading copper strips, comprises the technical steps that：Continuous up-casting-continuous
Extruding-continuously extruded for the second time-continuously extruded-rolling-annealing-Cleaning and Passivation-the cutting of third time.
(1) continuous up-casting：Using Cu-CATH-1 as raw material, will be carried out after Cu-CATH-1 pre-heating drying in smelting apparatus
Fusing, using charcoal and graphite flakes covering copper liquid surface, and through online degasification, deoxidation, stirring, then using on traction link seat
Draw copper bar.
Smelting apparatus includes smelting furnace, holding furnace, compartment is equipped between melting furnace and holding furnace, compartment is by being arranged in order
The first compartment, the second compartment, the 3rd compartment composition, be connected between melting furnace, compartment and holding furnace by flowing ditch, stream ditch be higher by
Furnace bottom 150mm, can promote the uniformity of copper liquid flowing, can play the effect of slagging-off.It is provided with the second compartment and removes online
Device of air, 99.996% argon gas is filled with by online depassing unit into copper liquid, and by controlled rotation graphite shaft and is turned
Son, the argon gas of metering is pressed into copper liquid and is dispersed as micro-bubble, it is uniformly dispersed in copper liquid, is removed so as to reach
Gas, the purpose of deoxidation, source outlet pressure 0.3MPa, 1.5~2.0Nm of flow3/ h, rotor speed control is in 100~120r/
min.Online depassing unit is installed in the second compartment, is connected by the stream ditch of the first compartment, the second compartment, the 3rd compartment,
It can not only ensure sufficient degasification and deoxidation effect, it can also be ensured that the stability of holding furnace liquid level.
For the control of crystallizer leaving water temperature at 36 DEG C, the temperature of smelting furnace is 1155 DEG C, is covered, ensured using the charcoal of drying
The reducing atmosphere of smelting furnace；Charcoal granularity is 40mm~50mm, and cladding thickness 120mm~150mm, the temperature of holding furnace is 1150
DEG C, covered using graphite flakes, its cladding thickness 30mm~35mm.On to draw copper shank diameter be 30mm, above draw the knot that copper bar uses
Brilliant device is ceramic material, meanwhile, crystallizer surface chromium plating, the thickness of chrome layer is 0.05~0.1mm；Installed in crystallizer front end
Foam ceramic filter device, foam ceramic filter device is using rich alumina silicate as core, the filtration apparatus using boron glass as shell, its chemistry
Component is 30~60% alundum (Al2O3)s, 30~60% silica, 5~25% diboron trioxides, foam ceramic filter device
Porosity between 66~70%.
Draw its copper content of copper bar on preparing more than 99.99%, oxygen content is less than 5ppm, and conductivity is more than 102%IACS,
Tensile strength is more than 190MPa, and elongation percentage is more than 40%.
(2) it is continuously extruded：The copper bar prepared using continuous up-casting prepares copper rod, continuously as raw material using continuously extruded unit
Extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 0.9mm, and continuously extruded extrusion temperature is more than 700 degree, crowded
Pressure pressure is more than 1000MPa, and die for continuously extruding thickness is 20mm, spacer thickness 70mm, continuously extruded to prepare the straight of copper rod
Footpath is 30mm, grain size 0.08-0.12mm, and the tensile strength of copper rod is more than 220MPa, and elongation percentage is more than 50%.
(3) it is continuously extruded for the second time：Continuous extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 1.1mm,
Continuously extruded extrusion temperature is more than 700 degree, and squeeze pressure is more than 1000MPa, and die for continuously extruding thickness is 50mm, and gasket is thick
Spend and be more than for 50mm, the continuously extruded a diameter of 30mm for preparing copper rod, grain size 0.02-0.07mm, the tensile strength of copper rod
230MPa, elongation percentage are more than 55%.
(4) third time is continuously extruded：Continuous extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 1.2mm,
Continuously extruded extrusion temperature is more than 700 degree, and squeeze pressure is more than 1000MPa, and die for continuously extruding thickness is 20mm, and gasket is thick
It is 10mm × 350mm, grain size 0.002-0.01mm to spend for 70mm, the continuously extruded size for preparing made-up belt, and copper strip billet resists
Tensile strength is more than 250MPa, and elongation percentage is more than 60%.
(5) continuous rolling：Copper strip billet is carried out by multi- pass rolling, pass reduction 45%-50%, by copper using milling train
With continuous rolling to thickness 0.3mm.
(6) anneal：Using gas shield bright annealing equipment, the copper strips after rolling is annealed, annealing temperature 300
DEG C -350 DEG C, when the time 5 is small.
(7) Cleaning and Passivation：Copper strips after annealing is subjected to Cleaning and Passivation.
(8) cut：Copper strips is cut using cutting apparatus.
The copper strips copper content of preparation is more than 99.99%, and oxygen content is less than 5ppm, and conductivity is more than 102.5%IACS, tension
Intensity 250MPa-260MPa, elongation percentage are more than 60%.
Claims (1)
1. multi-pass is continuously extruded to prepare high-purity high method for leading copper strips, it is characterised in that：Continuous up-casting-continuously extruded-the
Secondary continuously extruded-continuously extruded-rolling-annealing-Cleaning and Passivation-cutting of third time：
(1) continuous up-casting：Using Cu-CATH-1 as raw material, will be melted after Cu-CATH-1 pre-heating drying in smelting apparatus
Change, using charcoal and graphite flakes covering copper liquid surface, and through online degasification, deoxidation, stirring, then using drawing on traction link seat
Copper bar；Smelting apparatus includes smelting furnace, holding furnace, be equipped with compartment between melting furnace and holding furnace, and compartment is by being arranged in order
First compartment, the second compartment, the 3rd compartment composition, are connected, Liu Gougao comes out of the stove between melting furnace, compartment and holding furnace by flowing ditch
Bottom 150mm, can promote the uniformity of copper liquid flowing, can play the effect of slagging-off.Online degasification is installed in the second compartment
Device, is filled with 99.996% argon gas by online depassing unit into copper liquid, and by controlled rotation graphite shaft and rotor,
The argon gas of metering is pressed into copper liquid and is dispersed as micro-bubble, it is uniformly dispersed in copper liquid, so as to reach degasification, take off
The purpose of oxygen, source outlet pressure 0.3MPa, 1.5~2.0Nm of flow3/ h, rotor speed control is in 100~120r/min；Will
Online depassing unit is installed in the second compartment, is connected by the stream ditch of the first compartment, the second compartment, the 3rd compartment；Crystallizer
At 35 DEG C~40 DEG C, the temperature of smelting furnace is 1150 DEG C~1155 DEG C, is covered, ensured using the charcoal of drying for leaving water temperature control
The reducing atmosphere of smelting furnace；Charcoal granularity is 40mm~50mm, and cladding thickness 120mm~150mm, the temperature of holding furnace is 1145
DEG C~1150 DEG C, covered using graphite flakes, its cladding thickness 30mm~35mm.On to draw copper shank diameter be 30mm, above draw copper bar
The crystallizer used is ceramic material, meanwhile, crystallizer surface chromium plating, the thickness of chrome layer is 0.05~0.1mm；In crystallizer
Foam ceramic filter device is installed in front end, and using rich alumina silicate as core, the filtering using boron glass as shell fills foam ceramic filter device
Put, its chemical composition is 30~60% alundum (Al2O3)s, 30~60% silica, 5~25% diboron trioxides, foamed ceramics
The porosity of filtration apparatus is between 66~70%；Draw its copper content of copper bar on preparing more than 99.99%, oxygen content is less than
5ppm, conductivity are more than 102%IACS, and tensile strength is more than 190MPa, and elongation percentage is more than 40%；
(2) it is continuously extruded：The copper bar prepared using continuous up-casting prepares copper rod as raw material using continuously extruded unit, continuously extruded
Machine rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 0.9mm, and continuously extruded extrusion temperature is more than 700 degree, and extruding is pressed
Power is more than 1000MPa, and die for continuously extruding thickness is 20mm, spacer thickness 70mm, continuously extruded to prepare a diameter of of copper rod
30mm, grain size 0.08-0.12mm, the tensile strength of copper rod are more than 220MPa, and elongation percentage is more than 50%；
(3) it is continuously extruded for the second time：Continuous extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 1.1mm, continuously
The extrusion temperature of extruding is more than 700 degree, and squeeze pressure is more than 1000MPa, and die for continuously extruding thickness is 20mm, and spacer thickness is
70mm, the continuously extruded a diameter of 30mm for preparing copper rod, grain size 0.02-0.07mm, the tensile strength of copper rod are more than
230MPa, elongation percentage are more than 55%；
(4) third time is continuously extruded：Continuous extruder rotating speed is 7r/min, and the gap width of extruding wheel and cavity is 1.2mm, continuously
The extrusion temperature of extruding is more than 700 degree, and squeeze pressure is more than 1000MPa, and die for continuously extruding thickness is 50mm, and spacer thickness is
50mm, the continuously extruded size for preparing made-up belt are 10mm × 350mm, grain size 0.002-0.01mm, and the tension of copper strip billet is strong
Degree is more than 250MPa, and elongation percentage is more than 60%；
(5) continuous rolling：Copper strip billet is carried out by multi- pass rolling, pass reduction 45%-50%, by copper ribbon continuous using milling train
It is continuous to be rolled down to thickness 0.3mm；
(6) anneal：Using gas shield bright annealing equipment, the copper strips after rolling is annealed, 300 DEG C -350 of annealing temperature
DEG C, when the time 5 is small；
(7) Cleaning and Passivation：Copper strips after annealing is subjected to Cleaning and Passivation；
(8) cut：Copper strips is cut using cutting apparatus；
The copper strips copper content of preparation is more than 99.99%, and oxygen content is less than 5ppm, and conductivity is more than 102.5%IACS, tensile strength
250MPa-260MPa, elongation percentage are more than 60%.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079116A (en) * | 2018-07-10 | 2018-12-25 | 浙江力博实业股份有限公司 | A kind of preparation method of electrode material corson alloy |
| CN110076209A (en) * | 2019-05-13 | 2019-08-02 | 浙江力博实业股份有限公司 | A kind of preparation method of copper for relay band |
| CN110076210A (en) * | 2019-05-13 | 2019-08-02 | 浙江力博实业股份有限公司 | A kind of preparation method of relay high-fire resistance copper strips |
| CN112108888A (en) * | 2020-09-08 | 2020-12-22 | 江西奥易特新材料有限公司 | Copper plate and strip continuous extrusion method |
| CN112570993A (en) * | 2020-12-04 | 2021-03-30 | 无锡通伟电力设备有限公司 | Processing method of conductive copper bus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109079116A (en) * | 2018-07-10 | 2018-12-25 | 浙江力博实业股份有限公司 | A kind of preparation method of electrode material corson alloy |
| CN110076209A (en) * | 2019-05-13 | 2019-08-02 | 浙江力博实业股份有限公司 | A kind of preparation method of copper for relay band |
| CN110076210A (en) * | 2019-05-13 | 2019-08-02 | 浙江力博实业股份有限公司 | A kind of preparation method of relay high-fire resistance copper strips |
| CN112108888A (en) * | 2020-09-08 | 2020-12-22 | 江西奥易特新材料有限公司 | Copper plate and strip continuous extrusion method |
| CN112570993A (en) * | 2020-12-04 | 2021-03-30 | 无锡通伟电力设备有限公司 | Processing method of conductive copper bus |
| CN112570993B (en) * | 2020-12-04 | 2024-01-30 | 无锡通伟电力设备有限公司 | Processing method of conductive copper bus |
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