CN110385351A - A kind of production method of section copper strip - Google Patents
A kind of production method of section copper strip Download PDFInfo
- Publication number
- CN110385351A CN110385351A CN201910643089.6A CN201910643089A CN110385351A CN 110385351 A CN110385351 A CN 110385351A CN 201910643089 A CN201910643089 A CN 201910643089A CN 110385351 A CN110385351 A CN 110385351A
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- time
- copper strip
- section
- section copper
- working modulus
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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
- 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
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/14—Plants for continuous casting
- B22D11/145—Plants for continuous casting for upward casting
-
- 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
The present invention relates to a kind of production methods of section copper strip comprising following steps: continuous up-casting, continuously extruded, a time rolling, a time draw, anneal；The crystallite dimension of the section copper strip of this method preparation is 0.007-0.015mm, conductivity is greater than 101%IACS, and hydrogen embrittlement test alternating bending frequency is not less than 15 times, and tensile strength is greater than 220MPa, and elongation percentage is greater than 55%.
Description
Technical field
The present invention relates to a kind of non-ferrous metals processing method more particularly to a kind of production methods of section copper strip.
Background technique
Section copper strip is mainly used for making the industries such as high-precision lead frame and new-energy automobile, uses characteristic according to it,
Major requirement is as follows: having high conduction and heating conduction, while should have good intensity, hardness, softening resistance, plating resistance
Energy, soldering and plastic packaging performance.
The traditional production technology of section copper strip mainly has rolling, milling method, forging method etc..
Rolling: using Japanese firm as representative, corresponding section copper strip blank, recycling type are mainly rolled out by roll
Rolling produces finished product.Its disadvantage: made-up belt performance, the surface quality of casting are difficult to meet the requirement of following process.Product size essence
Degree is not high, is also easy to produce biggish internal stress, plate shape is difficult to control.
Milling method: being that section copper strip blank is obtained with milling first, recycling type rolling is produced using German company as representative
Finished product.Disadvantage: the utilization rate of band is low, lumber recovery is lower, consistency is lower, mechanical performance is poor, surface quality is poor.
Forging method: using French company as representative, forging section copper strip blank with high velocity forging machine, then passes through type rolling
Produce product.Advantage: metal loss is few, precision is high, and product internal stress is small.Disadvantage: process flow is long, production efficiency is lower.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies in the prior art, a kind of short stream of the section copper strip haveing excellent performance is provided
Journey production method.
The technical scheme is that
A kind of production method of section copper strip, comprising the following specific steps
(1) continuous up-casting
Using power frequency smelting apparatus carry out continuous up-casting copper bar, smelting apparatus include smelting furnace, holding furnace, traction device,
Devices for taking-up.
Traction device includes crystallizer, graphite jig, sheath, traction electric machine.
Graphite jig is mounted on crystalliser feet, is stoppered and is applied with asbestos yarn with crystalliser feet junction in graphite jig
Upper graphite latex is to prevent air inlet from seeping copper.
The depth that graphite jig is inserted into copper liquid is 30-50mm, and crystallizer cooling water passes in and out water temperature difference at 15 DEG C.Melting furnace temperature
Degree is 1205 DEG C, and heat preservation furnace temperature is 1155 DEG C, melting furnace 380~420V of voltage, 300~340V of holding furnace voltage.
The diameter of continuous up-casting copper bar is Φ 20mm, 3~5mm of pitch, 600~700mm/min of continuous up-casting copper bar speed；
Copper liquid liquid level is 400~450mm；Melting furnace is covered with charcoal, and 100~150mm of thickness, holding furnace is covered with graphite phosphorus sheet
Lid maintains an equal level with a thickness of 30~40mm with sheath upper surface.
(2) continuously extruded
Continuous up-casting copper bar is carried out continuously extruded to prepare section copper strip blank.
First continuously extruded moulds of industrial equipment are preheated, 460 DEG C of temperature, keeps the temperature 5 hours；Moulds of industrial equipment after preheating are put
Into after shoe, it is put into guide plate, covers pressure plate, tightens screw, closes shoe, hold-down cylinder is compressed, puts on anti-oxidation pipe；Hold-down cylinder
Pressure gauge is 22~25Mpa, 3.5 turns of the speed of mainshaft, adds hot material.Hot material be 10 diameters be Φ 30mm, length be 400 ㎜,
Temperature is 700~800 DEG C of oxygen-free copper bars.
The gap of continuously extruded moulds of industrial equipment and extruding wheel is 0.7mm.
The section copper strip base of continuously extruded preparation and the section copper strip cross section of finished product are in proportion.
(3) a time rolls
Continuously extruded section copper strip blank is subjected to a time rolling.
The working modulus of a time rolling is 20%-50%.
Two-roller mill is used when a time rolls, wherein lower roll is plain-barreled roll, and upper roller is type roller.
A time roll when, section copper strip first passes through centralising device, rolled subsequently into roll, after rolling using
Second centralising device, type roller are consistent with the center line of section copper strip.
When a time rolls, section copper strip different cross section uses non-working modulus in proportion, and heavy in section working modulus is than small
The big 0.5%-2% of the working modulus in section.
(4) a time is drawn
Section copper strip after a time is rolled carries out a time drawing.
The working modulus that a time is drawn is 5%-15%.
A time draws draws for continuous volume.
When a time is drawn, section copper strip different-thickness uses non-working modulus in proportion, and heavy in section working modulus is than small
The small 0.5%-2% of the working modulus in section.
After a time is drawn, the surface roughness of section copper strip is less than 0.1 μm.
(5) it anneals
Section copper strip after a time is drawn is annealed, and annealing temperature is 300-500 DEG C, and soaking time is that 6-8 is small
When, the crystallite dimension of the section copper strip of preparation is 0.007-0.015mm, conductivity is greater than 101%IACS, and hydrogen embrittlement test is repeatedly curved
Bent number is not less than 15 times, and tensile strength is greater than 220MPa, and elongation percentage is greater than 55%.
The beneficial effects of the present invention are:
1. being drawn using continuous up-casting, continuously extruded, a time rolling, a time, the production method of annealing, realize different
The short route of type copper strips produces, and production method provided by the invention is not only energy-efficient, but also has excellent performance.
Using non-machining deformation method in proportion, the special-shaped copper of preparation when 2. a time rolling, a time draw deformation
Band dimensional accuracy is high.
3. using two sets of centralising devices when a time rolls, guarantee section copper strip dimensional accuracy.
4. a time rolls, the plate as caused by roll elastic-plastic deformation can be eliminated using non-working modulus in proportion
The problem of shape difference.
5. a time is drawn, the problem of caused plate shape difference when volume is drawn can be eliminated using non-working modulus in proportion.
Detailed description of the invention
Fig. 1 is the change in size schematic diagram of section copper strip of the invention in process of production.
Specific embodiment
The invention will be further described With reference to embodiment.
(1) continuous up-casting
Using power frequency smelting apparatus carry out continuous up-casting copper bar, smelting apparatus include smelting furnace, holding furnace, traction device,
Devices for taking-up.
Traction device includes crystallizer, graphite jig, sheath, traction electric machine.
Graphite jig is mounted on crystalliser feet, is stoppered and is applied with asbestos yarn with crystalliser feet junction in graphite jig
Upper graphite latex is to prevent air inlet from seeping copper.
The depth that graphite jig is inserted into copper liquid is 50mm, and crystallizer cooling water passes in and out water temperature difference at 15 DEG C.Melting furnace temperature
It is 1205 DEG C, heat preservation furnace temperature is 1155 DEG C, melting furnace voltage 420V, holding furnace voltage 300V.
The diameter of continuous up-casting copper bar is Φ 20mm, pitch 5mm, continuous up-casting copper bar speed 700mm/min；Copper liquid liquid level
Height is 450mm；Melting furnace is covered with charcoal, and thickness 150mm, holding furnace is covered with graphite phosphorus sheet, with a thickness of 30mm, with sheath
Upper surface maintains an equal level.
(2) continuously extruded
Continuous up-casting copper bar is carried out continuously extruded to prepare section copper strip blank.
First continuously extruded moulds of industrial equipment are preheated, 460 DEG C of temperature, keeps the temperature 5 hours；Moulds of industrial equipment after preheating are put
Into after shoe, it is put into guide plate, covers pressure plate, tightens screw, closes shoe, hold-down cylinder is compressed, puts on anti-oxidation pipe；Hold-down cylinder
Pressure gauge is 25Mpa, 3.5 turns of the speed of mainshaft, adds hot material.Hot material be 10 diameters be Φ 30mm, length is 400 ㎜, temperature
For 750 DEG C of oxygen-free copper bars.
The gap of continuously extruded moulds of industrial equipment and extruding wheel is 0.7mm.
The size of the section copper strip base T1 of continuously extruded preparation is that the size of 6mm, H1 are 4mm.
(3) a time rolls
Continuously extruded section copper strip blank is subjected to a time rolling.
Two-roller mill is used when a time rolls, wherein lower roll is plain-barreled roll, and upper roller is type roller.
A time roll when, section copper strip first passes through centralising device, rolled subsequently into roll, after rolling using
Second centralising device, type roller are consistent with the center line of section copper strip.
When a time rolls, section copper strip different-thickness uses non-working modulus in proportion.
It is 2.2mm that the size of section copper strip T2, which is the size of 3.24mm, H2, after a time rolling.
(4) a time is drawn
Section copper strip after a time is rolled carries out a time drawing.
A time draws draws for continuous volume.
When a time is drawn, section copper strip different-thickness uses non-working modulus in proportion.
After a time is drawn, the size of section copper strip base T3 is that the size of 3mm, H3 are 2mm.
(5) it anneals
Section copper strip after a time is drawn is annealed, and annealing temperature is 350 DEG C, and soaking time is 8 hours.
The crystallite dimension of the section copper strip of above method preparation is 0.007-0.015mm, conductivity is greater than 101%IACS,
Hydrogen embrittlement test alternating bending frequency 18 times, tensile strength 250MPa, elongation percentage 60%, surface roughness is less than 0.1 μm.
Above-described embodiment is only used for illustrating inventive concept of the invention, rather than the restriction to rights protection of the present invention,
It is all to be made a non-material change to the present invention using this design, protection scope of the present invention should all be fallen into.
Claims (1)
1. a kind of production method of section copper strip, it is characterised in that: the following steps are included: continuous up-casting, continuously extruded, a time
Rolling, a time draw, anneal；The production method comprises the concrete steps that:
(1) continuous up-casting
Continuous up-casting copper bar is carried out using power frequency smelting apparatus, the smelting apparatus includes smelting furnace, holding furnace, traction dress
It sets, devices for taking-up；The traction device includes crystallizer, graphite jig, sheath, traction electric machine；Graphite jig is mounted on knot
Brilliant device bottom is stoppered with asbestos yarn with crystalliser feet junction in graphite jig and latex of graphiting is to prevent air inlet from seeping
Copper；The depth that graphite jig is inserted into copper liquid is 30-50mm, and crystallizer cooling water passes in and out water temperature difference at 15 DEG C.Melting furnace temperature is
1205 DEG C, heat preservation furnace temperature is 1155 DEG C, melting furnace 380~420V of voltage, 300~340V of holding furnace voltage；Continuous up-casting copper
The diameter of bar is Φ 20mm, 3~5mm of pitch, 600~700mm/min of continuous up-casting copper bar speed；Copper liquid liquid level is 400
~450mm；Melting furnace is covered with charcoal, and 100~150mm of thickness, holding furnace is covered with graphite phosphorus sheet, with a thickness of 30~40mm,
Maintain an equal level with sheath upper surface；
(2) continuously extruded
Continuously extruded moulds of industrial equipment are preheated, and 460 DEG C of temperature, keep the temperature 5 hours；Put the moulds of industrial equipment after preheating into shoe
Afterwards, it is put into guide plate, covers pressure plate, tightens screw, closes shoe, hold-down cylinder is compressed, puts on anti-oxidation pipe；Hold-down cylinder pressure gauge
For 22~25Mpa, 3.5 turns of the speed of mainshaft, hot material is added；The gap of continuously extruded moulds of industrial equipment and extruding wheel is 0.7mm；Continuously
The section copper strip cross section of the section copper strip base and finished product that squeeze preparation is in proportion；
(3) a time rolls
Continuously extruded section copper strip blank is subjected to a time rolling, the working modulus of a time rolling is 20%-50%, together
Two-roller mill is used when secondary rolling, wherein lower roll is plain-barreled roll, and upper roller is type roller.When a time rolls, section copper strip is first passed through pair
Middle device, is rolled subsequently into roll, using second centralising device, the center line of type roller and section copper strip after rolling
Unanimously, when a time rolls, section copper strip different cross section uses non-working modulus in proportion, and heavy in section working modulus compares small bore
The big 0.5%-2% of working modulus；
(4) a time is drawn
Section copper strip after a time is rolled carries out a time drawing, and the working modulus that a time is drawn is 5%-15%, together
Secondary draw is drawn for continuously volume, and when a time rolls, section copper strip different cross section uses non-working modulus in proportion, heavy in section to add
Work rate is 0.5%-2% bigger than the working modulus of small bore, and after a time is drawn, the surface roughness of section copper strip is less than 0.1 μm；
(5) it anneals
Section copper strip after a time is drawn is annealed, and annealing temperature is 300-500 DEG C, and soaking time is 6-8 hours；
The crystallite dimension of the section copper strip of above method preparation is 0.007-0.015mm, conductivity is greater than 101%IACS, hydrogen embrittlement
It tests alternating bending frequency to be not less than 15 times, tensile strength is greater than 220MPa, and elongation percentage is greater than 55%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910643089.6A CN110385351B (en) | 2019-07-17 | 2019-07-17 | Production method of special-shaped copper strip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910643089.6A CN110385351B (en) | 2019-07-17 | 2019-07-17 | Production method of special-shaped copper strip |
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| CN110385351A true CN110385351A (en) | 2019-10-29 |
| CN110385351B CN110385351B (en) | 2021-01-19 |
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Citations (9)
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|---|---|---|---|---|
| CN1112462A (en) * | 1992-08-18 | 1995-11-29 | 鞍山金属材料厂 | High-accuracy shaped strip copper and its producing technology |
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| JP2012097327A (en) * | 2010-11-02 | 2012-05-24 | Hitachi Cable Ltd | Copper alloy improved in hot and cold workability, method for production thereof, and copper alloy strip or alloy foil obtained from copper alloy |
| CN102941240A (en) * | 2012-12-06 | 2013-02-27 | 天津美腾铜业有限公司 | Manufacturing technique of copper roll bar or copper strip |
| CN104959396A (en) * | 2015-08-04 | 2015-10-07 | 绍兴市力博电气有限公司 | Production process of copper strip for composite contact material |
| CN106239044A (en) * | 2016-08-04 | 2016-12-21 | 徐高磊 | A kind of copper strips production technology for LED support |
| CN107999560A (en) * | 2017-12-01 | 2018-05-08 | 浙江力博实业股份有限公司 | The preparation method of breaker copper strips |
| CN109182831A (en) * | 2018-09-28 | 2019-01-11 | 浙江力博实业股份有限公司 | It is a kind of to draw the preparation method for using copper strips |
| CN109201767A (en) * | 2018-09-28 | 2019-01-15 | 浙江力博实业股份有限公司 | A kind of production technology of power battery tab copper strips |
-
2019
- 2019-07-17 CN CN201910643089.6A patent/CN110385351B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1112462A (en) * | 1992-08-18 | 1995-11-29 | 鞍山金属材料厂 | High-accuracy shaped strip copper and its producing technology |
| CN101916624A (en) * | 2010-08-06 | 2010-12-15 | 绍兴市力博电气有限公司 | Production method of conducting copper bars for bus duct with large flakiness ratio |
| JP2012097327A (en) * | 2010-11-02 | 2012-05-24 | Hitachi Cable Ltd | Copper alloy improved in hot and cold workability, method for production thereof, and copper alloy strip or alloy foil obtained from copper alloy |
| CN102941240A (en) * | 2012-12-06 | 2013-02-27 | 天津美腾铜业有限公司 | Manufacturing technique of copper roll bar or copper strip |
| CN104959396A (en) * | 2015-08-04 | 2015-10-07 | 绍兴市力博电气有限公司 | Production process of copper strip for composite contact material |
| CN106239044A (en) * | 2016-08-04 | 2016-12-21 | 徐高磊 | A kind of copper strips production technology for LED support |
| CN107999560A (en) * | 2017-12-01 | 2018-05-08 | 浙江力博实业股份有限公司 | The preparation method of breaker copper strips |
| CN109182831A (en) * | 2018-09-28 | 2019-01-11 | 浙江力博实业股份有限公司 | It is a kind of to draw the preparation method for using copper strips |
| CN109201767A (en) * | 2018-09-28 | 2019-01-15 | 浙江力博实业股份有限公司 | A kind of production technology of power battery tab copper strips |
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Effective date of registration: 20201218 Address after: 312000 Libo Industrial Park, Pingshui Town, Keqiao District, Shaoxing City, Zhejiang Province Applicant after: ZHEJIANG LIBO HOLDING GROUP Co.,Ltd. Applicant after: Shaoxing Libo Technology Co.,Ltd. Applicant after: Jiangxi libokecheng Copper Co.,Ltd. Address before: 312030 Libo Industrial Park, Pingshui Town, Keqiao District, Shaoxing City, Zhejiang Province Applicant before: Shaoxing Libo Technology Co.,Ltd. |
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