CN105671356B - A kind of copper alloy with high strength and high conductivity shielding material and preparation method thereof - Google Patents
A kind of copper alloy with high strength and high conductivity shielding material and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of copper alloy with high strength and high conductivity shielding material and preparation method thereof, belong to non-ferrous metals processing field.The percentage by weight of the material is constituted：Cr 0.05~0.75%, Zr 0.01~0.05%, Ag 0.012~0.12%, Fe 0.005~0.05%, B 0.002~0.01%, remaining is Cu, wherein, the mass ratio of silver and zirconium is 1.2~2.4.By melting and casting, hot rolling, solution treatment, once cold rolling, Ageing Treatment, secondary cold-rolling and annealing prepare the material.The tensile strength sigma of the high-intensity high-conductivity copper alloy shielding material of the present inventionbFor 500~550MPa, plastic elongation rate δ is 6~15%, and electrical conductivity is 88~93%IACS, and anti-capability of electromagnetic shielding is 90~150dB, fully meets requirement of the electric wire to protection coating Cu alloy material.
Description
Technical field
The present invention relates to a kind of copper alloy with high strength and high conductivity shielding material and preparation method thereof, belong to non-ferrous metals processing neck
Domain.
Background technology
With the rapid growth of China's economic, the continuous improvement of industrialization and urbanization, super-pressure UHV transmission net and
The upgrading of rural power grids is further speeded up, and the Eleventh Five-Year Plan period cable industry obtains fast development.Cable it is main by conductor wire core, absolutely
Edge layer, sealing sheath and protection coating four part composition.Coating is wherein protected to be mainly used to protect sealing sheath from machine
Tool is damaged.General to be surrounded using galvanized steel strip, steel wire or copper strips, copper wire etc. as armor outside sheath, armor mainly rises anti-
The only effect of external electromagnetic wave interference.Therefore, protection covering layer material should have certain mechanical strength, conductive capability and anti-electricity
Magnetic shield performance.
With the fast development of science and technology, the increasingly renewal of electronic electric equipment, electromagnetic spectrum is also not only rested on
It is just rapid to be extended to low side audio frequency, secondary frequency and high-end optical frequency in the range of radio wave, so that the electromagnetism that electromagnetic radiation triggers
Interference has become the fourth-largest social effects of pollution after water pollution, air pollution and noise pollution.Electromagnetic interference not only influences communication
Equipment, the stability of electronic device works, security and reliability, and harm human body health.Particularly some
Under adverse circumstances, electromagnetic environment tends to complicate, and in addition to the natural electromagnetic interference source such as thunder and lightning, electrostatic, have also appeared interference
Effect more strong artificial disturbance source, such as radio communication, the interference for release of navigating.So, electric wire protection is covered
The anti-capability of electromagnetic shielding of cover material proposes higher requirement.At present, widely used shielding material is mainly traditional
High-conductive metal material and ferrimagnet.But above material is all narrow in the presence of electromagnetic shielding frequency range, and low-frequency range shield effectiveness is paid no attention to
The shortcoming thought.Therefore, it is in the electromagnetic shielding most important research of protective materials to improve electromagnet shield effect and widen frequency range
Hold.
Copper and copper alloy have that higher-strength, good toughness, wear-resisting, ductility are good, electrical and thermal conductivity is high, excellent corrosion-resistant
The performance characteristics such as ability, are widely used for the fields such as electronic apparatus, Aero-Space, machine-building.Although copper and copper alloy tool
There is excellent electric conductivity, there can be good anti-capability of electromagnetic shielding under high frequency environment, but in low-frequency range effectiveness
It is undesirable.Therefore, a kind of copper alloy with the high electromagnet shield effect of high conductivity (screening frequencies is wide) is developed to have compeled in eyebrow
Eyelash.
The content of the invention
The main object of the present invention is the deficiency for making up existing copper alloy property, develops a kind of high-strength high-conductivity copper
Alloy shielding material and preparation method thereof.
A kind of copper alloy with high strength and high conductivity shielding material, its percentage by weight, which is constituted, is：Cr 0.05~0.75%, Zr
0.01~0.05%, Ag 0.012~0.12%, Fe 0.005~0.05%, B 0.002~0.01%, remaining is Cu, wherein,
The mass ratio of silver and zirconium is 1.2~2.4.
Added alloys producing：
Chromium：Chromium is main to be separated out in ag(e)ing process with simple substance chromium, improves the intensity and electrical conductivity of alloy.Due to chromium member
Element solubility maximum in copper is 0.75%.Therefore, the Cr contents of copper alloy of the invention are less than 0.75%, when chromium content is small
In 0.05%, the raising to alloy strength is not obvious.
Zirconium：From copper-zirconium binary phase diagraml, zr element can be combined in ag(e)ing process with copper, formed copper zirconium precipitated phase, carried
The intensity and electrical conductivity of high alloy, usual zirconium content are 0.02~0.16%.But because copper zirconium precipitated phase is a kind of discoid, it is used to
Habit face is the precipitated phase in matrix { 111 } face, so zr element is not very big to copper zirconium or chrome zirconium copper alloy intensity contribution.Separately
Outside, easy scaling loss during zr element smelting copper alloy, the rate of recovery is low.Therefore, selection of the present invention replaces part zirconium with silver element
Element, optimizes and designs to the composition of chrome zirconium copper alloy.Therefore the content of zr element is 0.01~0.05% in the present invention,
Main function is to promote the precipitation of simple substance chromium phase in ag(e)ing process and suppress growing up for simple substance chromium phase, and the high temperature for improving alloy is steady
It is qualitative.
Silver：A small amount of silver element is except that on the premise of substantially alloy electrical conductivity is not lowered, can improve the intensity of alloy
Outside high temperature resistance softening performance, also there is significant impact to precipitated phase.Add in the present invention with silver element, not only can be with
Suppress simple substance chromium phase to grow up, moreover it is possible to suppress growing up for copper zirconium phase, simple substance iron phase and boron chromium phase, thus improve alloy intensity and
Electrical conductivity.There is similar effect on to precipitated phase and alloy property in view of silver and zr element, now zirconium is replaced with silver.Cause
This, it is 1.2~2.4 that Ag/Zr atomic ratio, which should be 1~2, i.e. Ag/Zr mass ratio,.So, corresponding silver content be 0.012~
0.12%.
Iron：From copper-iron binary phase diagraml, at 1096 DEG C, maximum solid solution degree of the iron in copper is 4%, but at 300 DEG C
Hereinafter, therefore solid solubility of the iron in copper, added 0.005~0.05%, can significantly be carried in the alloy only less than 0.0004%
The intensity of high alloy, and the anti-capability of electromagnetic shielding of alloy can be improved.
Boron：From copper-boron binary phase diagraml, in 1013 DEG C of eutectic temperature, maxima solubility of the boron in copper is
0.05wt%, as the decline of temperature is rapidly decreased to zero, but boron does not form compound with copper, but can be combined with chromium, shape
Into boron chromium compound, matrix is further purified, the electrical conductivity of alloy is improved, the anti-electromagnet shield effect of alloy can be significantly improved,
Particularly low-frequency range capability of electromagnetic shielding.But when the Boron contents in alloy are more than 0.01%, there is no unnecessary chromium in alloy
Combined with boron, easily produce boron excess, low-alloyed capability of electromagnetic shielding can be dropped.And Boron contents be less than 0.002% when, alloy
Anti- capability of electromagnetic shielding is not obvious.Therefore, Boron contents are 0.002~0.01% in the present invention.
It is a further object of the present invention to provide the preparation processing method of above-mentioned copper alloy with high strength and high conductivity shielding material.
A kind of preparation processing method of copper alloy with high strength and high conductivity shielding material, including following technological process：A. according to quality
Percentage carry out dispensing, feed intake, melting and casting, b. hot rollings, c. solution treatment, d. once cold rollings, e. Ageing Treatments, f. bis- times
It is cold rolling, g. annealings.
In step a, founding is carried out using vacuum medium frequency induction furnace, the temperature of described melting is 1200~1250 DEG C, institute
The temperature control of casting is stated at 1100~1150 DEG C.
Before melting, cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu- are added in magnesia crucible
3%B intermediate alloys, rise to 1200~1250 DEG C by temperature, after copper copper fusing to be electrolysed, vacuumize, vacuum is less than 0.1Pa,
Then nitrogen is passed through again, and after melt is completely melt, uniform stirring is incubated after 10min and cast.
In step b, above-mentioned alloy cast ingot is heated in stepping batch-type furnace, temperature is 900~950 DEG C, during insulation
Between be 1~5h, hot rolling is then carried out again, finishing temperature control then carries out water cooling at 750~800 DEG C.
In step c, by after hot rolling sheet material placing box formula annealing furnace carry out solution treatment, solid solution temperature be 900~
1000 DEG C, soaking time is 1~4h, and the type of cooling is water cooling.
In step d, the sheet material after solution treatment is subjected to once cold rolling, working modulus is 70~90%.
In step e, will be cold rolling after sheet material place box-annealing furnace carry out Ageing Treatment, aging temperature be 400~
500 DEG C, soaking time is 4~10h, and the type of cooling is air cooling.
In step f, the sheet material after Ageing Treatment is subjected to secondary cold-rolling, working modulus is 50~70%.
In step g, will be cold rolling after sheet material be placed in box-annealing furnace and made annealing treatment, annealing temperature is 400~
600 DEG C, soaking time is 1~6h.This process major control annealing temperature regulates and controls the relation of alloy structure and performance, especially carries
High alloy capability of electromagnetic shielding.
Advantages of the present invention：The present invention obtains a kind of high intensity height and led by carrying out composition design and optimization to copper alloy
Electric rate copper alloy shielding material, its chemical composition is：Chromium content is 0.05~0.75%, and zirconium content is 0.01~0.05%, silver
Content be 0.012~0.12%, iron content be 0.005~0.05%, Boron contents be 0.002~0.01%, wherein alloy silver with
The element mass ratio of zirconium is met：1.2≤Ag/Zr≤2.4.In addition, in order to ensure alloy and meanwhile have high intensity, high conductivity and
Excellent capability of electromagnetic shielding, the present invention have developed a kind of preparation processing method suitable for above-mentioned copper alloy, processed heat
Cu alloy material tensile strength after processing is 500~550MPa, and electrical conductivity is 88~93%IACS, and elongation percentage is 6~15%,
Anti- 90~150dB of capability of electromagnetic shielding (frequencies：50kHz~1GHz), electric wire is fully met to protection covering layer material
Use requirement.
Below by embodiment, the present invention will be further described, but is not meant to the scope of the present invention
Limitation.
Embodiment
The copper alloy with high strength and high conductivity shielding material of the present invention, it contains the chemical composition of following percetage by weight：Cr 0.05
~0.75%, Zr 0.01~0.05%, Ag 0.012~0.12%, Fe 0.005~0.05%, B 0.002~0.01%, its
Remaining is Cu.Wherein, the mass ratio of composition is met in the copper alloy：1.2≤Ag/Zr≤2.4.
The preparation of above-mentioned high strength and high conductivity copper alloy shielding material and processing method, including following technological process：A. according to
Mass percent carry out dispensing, feed intake, melting and casting, b. hot rollings, c. solution treatment, d. once cold rollings, e. Ageing Treatments, f.
Secondary cold-rolling, g. annealings.Wherein, specific feeding sequence is：In magnesia crucible add cathode copper, fine silver, pure iron,
Cu-5%Cr, Cu-10%Zr and Cu-3%B intermediate alloy, 1200~1250 DEG C, after copper copper fusing to be electrolysed are risen to by temperature,
Vacuumize, vacuum is less than 0.1Pa, and nitrogen is then passed through again, after melt is completely melt, cast after uniform stirring.Melting
Temperature is 1200~1250 DEG C, and the temperature control of casting is at 1100~1150 DEG C；Hot-rolled temperature is 900~950 DEG C, soaking time
For 1~5h, finishing temperature control is at 750~800 DEG C；Solid solution temperature is 900~1000 DEG C, and the time is 1~4h, cooling side
Formula is water cooling；The working modulus of once cold rolling is 70~90%；Aging temperature is 400~500 DEG C, is 4~10h, cooling side
Formula is air cooling；The working modulus of secondary cold-rolling is 50~70%；Make annealing treatment temperature：400~600 DEG C, soaking time is 1~6h.
Embodiment 1
The alloy of the present invention uses following raw material melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-
3%B intermediate alloys.The composition of alloy is shown in Table 1 embodiment 1.
1. melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-3%B are added in magnesia crucible
Intermediate alloy, rises to 1200 DEG C by temperature, after copper copper fusing to be electrolysed, vacuumizes, vacuum is less than 0.1Pa, is then passed through again
Nitrogen, after melt is completely melt, casts after uniform stirring, and cast temperature is 1150 DEG C.
2. hot rolling：Alloy is heated, temperature is 900 DEG C, soaking time is 5h, finishing temperature is 750 DEG C, cooling side
Formula is water cooling.
3. solution treatment：Sheet material after hot rolling is placed into box-annealing furnace and carries out solution treatment, solid solution temperature is 900
DEG C, soaking time is 4h, and the type of cooling is water cooling.
4. once cold rolling：Sheet material progress after solution treatment is cold rolling, and working modulus is 70%.
5. Ageing Treatment：Cold-rolled plate and strip is placed into box-annealing furnace and carries out Ageing Treatment, aging temperature is 400
DEG C, soaking time is 10h, and the type of cooling is air cooling.
6. secondary cold-rolling：Sheet material progress after Ageing Treatment is cold rolling, and working modulus is 50%.
7. annealing：It will be made annealing treatment in cold rolling rear Strip box-annealing furnace, annealing temperature is 400 DEG C, is protected
The warm time is 6h.
At above melting and casting, hot extrusion, solution treatment, once cold rolling, Ageing Treatment, secondary cold-rolling, annealing
After the working processes such as reason, its performance is shown in Table the embodiment 1 in 2.
Embodiment 2
The alloy of the present invention uses following raw material melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-
3%B intermediate alloys.The composition of alloy is shown in Table 1 embodiment 2.
1. melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-3%B are added in magnesia crucible
Intermediate alloy, rises to 1250 DEG C by temperature, after copper copper fusing to be electrolysed, vacuumizes, vacuum is less than 0.1Pa, is then passed through again
Nitrogen, after melt is completely melt, casts after uniform stirring, and cast temperature is 1150 DEG C.
2. hot rolling：Alloy is heated, temperature is 950 DEG C, soaking time is 1h, finishing temperature is 800 DEG C, cooling side
Formula is water cooling.
3. solution treatment：Sheet material placing box formula annealing furnace after hot rolling is subjected to solution treatment, solid solution temperature is 1000
DEG C, soaking time is 1h, and the type of cooling is water cooling.
4. once cold rolling：Band progress after solution treatment is cold rolling, and working modulus is 90%.
5. Ageing Treatment：Cold rolling rear Strip placing box formula annealing furnace is subjected to Ageing Treatment, aging temperature is 500
DEG C, soaking time is 4h, and the type of cooling is air cooling.
6. secondary cold-rolling：Band progress after Ageing Treatment is cold rolling, and working modulus is 70%.
7. annealing：Sheet material after will be cold rolling is placed to be made annealing treatment in batch-type furnace, and annealing temperature is 600 DEG C, is protected
The warm time is 1h.
By above melting and casting, hot rolling, solution treatment, once cold rolling, Ageing Treatment, secondary cold-rolling, annealing
After working process, its performance is shown in Table the embodiment 2 in 2.
Embodiment 3
The alloy of the present invention uses following raw material melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-
3%B intermediate alloys.The composition of alloy is shown in Table 1 embodiment 3.
1. melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-3%B are added in magnesia crucible
Intermediate alloy, rises to 1220 DEG C by temperature, after copper copper fusing to be electrolysed, vacuumizes, vacuum is less than 0.1Pa, is then passed through again
Nitrogen, after melt is completely melt, casts after uniform stirring, and cast temperature is 1100 DEG C.
2. hot rolling：Alloy is heated, temperature is 950 DEG C, soaking time is 2h, finishing temperature is 800 DEG C, cooling side
Formula is water cooling.
3. solution treatment：Hot rolled plate is placed into box-annealing furnace and carries out solution treatment, solid solution temperature is 900 DEG C,
Soaking time is 2h, and the type of cooling is water cooling.
4. once cold rolling：Strip progress after solution treatment is cold rolling, and working modulus is 80%.
5. Ageing Treatment：Cold rolling rear Strip placing box formula annealing furnace is subjected to Ageing Treatment, aging temperature is 450
DEG C, soaking time is 4h, and the type of cooling is air cooling.
6. secondary cold-rolling：Strip progress after Ageing Treatment is cold rolling, and working modulus is 60%.
7. annealing：It will be made annealing treatment in cold rolling rear Strip placing box formula stove, annealing temperature is 500 DEG C, is protected
The warm time is 3h.
By above melting and casting, hot rolling, solution treatment, once cold rolling, Ageing Treatment, secondary cold-rolling, annealing
After working process, its performance is shown in Table the embodiment 3 in 2.
Embodiment 4
The alloy of the present invention uses following raw material melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-
3%B intermediate alloys.The composition of alloy is shown in Table 1 embodiment 4.
1. melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-3%B are added in magnesia crucible
Intermediate alloy, rises to 1200 DEG C by temperature, after copper copper fusing to be electrolysed, vacuumizes, vacuum is less than 0.1Pa, is then passed through again
Nitrogen, after melt is completely melt, casts after uniform stirring, and cast temperature is 1120 DEG C.
2. hot rolling：Alloy is heated, temperature is 950 DEG C, soaking time is 4h, finishing temperature is 770 DEG C, cooling side
Formula is water cooling.
3. solution treatment：Sheet material placing box formula annealing furnace after hot rolling is subjected to solution treatment, solid solution temperature is 950
DEG C, soaking time is 4h, and the type of cooling is water cooling.
4. once cold rolling：Strip progress after solution treatment is cold rolling, and working modulus is 75%.
5. Ageing Treatment：Strip after will be cold rolling places box-annealing furnace and carries out Ageing Treatment, and aging temperature is
470 DEG C, soaking time is 5h, and the type of cooling is air cooling.
6. secondary cold-rolling：Strip progress after Ageing Treatment is cold rolling, and working modulus is 60%.
7. annealing：Strip after will be cold rolling is placed to be made annealing treatment in batch-type furnace, and annealing temperature is 540 DEG C,
Soaking time is 2h.
By above melting and casting, hot rolling, solution treatment, once cold rolling, Ageing Treatment, secondary cold-rolling, annealing
After working process, its performance is shown in Table the embodiment 4 in 2.
Embodiment 5
The alloy of the present invention uses following raw material melting：Cathode copper, fine silver, pure iron Cu-5%Cr, Cu-10%Zr and Cu-
3%B intermediate alloys.The composition of alloy is shown in Table 1 embodiment 5.
1. melting：Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-3%B are added in magnesia crucible
Intermediate alloy, rises to 1210 DEG C by temperature, after copper copper fusing to be electrolysed, vacuumizes, vacuum is less than 0.1Pa, is then passed through again
Nitrogen, after melt is completely melt, casts after uniform stirring, and cast temperature is 1100 DEG C.
2. hot rolling：Alloy is heated, temperature is 930 DEG C, soaking time is 3h, finishing temperature is 750 DEG C, cooling side
Formula is water cooling.
3. solution treatment：Sheet material placing box formula annealing furnace after hot rolling is subjected to solution treatment, solid solution temperature is 930
DEG C, soaking time is 2h, and the type of cooling is water cooling.
4. once cold rolling：Strip progress after solution treatment is cold rolling, and working modulus is 85%.
5. Ageing Treatment：Sheet material after will be cold rolling places box-annealing furnace and carries out Ageing Treatment, and aging temperature is 450
DEG C, soaking time is 8h, and the type of cooling is air cooling.
6. secondary cold-rolling：Strip progress after Ageing Treatment is cold rolling, and working modulus is 70%.
7. annealing：Band after will be cold rolling is placed to be made annealing treatment in batch-type furnace, and annealing temperature is 520 DEG C, is protected
The warm time is 4h.
By above melting and casting, hot rolling, solution treatment, once cold rolling, Ageing Treatment, secondary cold-rolling, annealing
After working process, its performance is shown in Table the embodiment 5 in 2.
The embodiment 1-5 of table 1 alloying component formula (wt%)
The embodiment 1-5 of table 2 alloy property table
Remarks：Electromagnet shield effect test is carried out on flange shaft tester, and specimen size is 15cm (length) × 15cm
(width) × h (thickness).
The tensile strength sigma of highly conductive high electromagnetic shielding Cu alloy material prepared by the present inventionbFor 500~550MPa, plasticity
Elongation percentage δ is 6~15%, and electrical conductivity is 88~93%IACS, and anti-capability of electromagnetic shielding is that (working frequency is 90~150dB
50kHz~1GHz), fully meet requirement of the electric wire to protection coating Cu alloy material.
Claims (10)
1. a kind of copper alloy with high strength and high conductivity shielding material, it is characterised in that：Its percentage by weight is constituted：Cr0.05~
0.75%, Zr 0.01~0.05%, Ag 0.012~0.12%, Fe 0.005~0.05%, B 0.002~0.01%, remaining
For Cu, wherein, the mass ratio of silver and zirconium is 1.2~2.4.
2. the preparation method of the copper alloy with high strength and high conductivity shielding material described in claim 1, comprises the following steps：A. according to quality
Percentage carry out dispensing, feed intake, melting and casting, b. hot rollings, c. solution treatment, d. once cold rollings, e. Ageing Treatments, f. bis- times
It is cold rolling, g. annealings.
3. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 2, it is characterised in that：Using vacuum
Intermediate frequency furnace carries out founding, and the temperature of described melting is 1200~1250 DEG C, and the temperature of the casting is 1100~1150
℃。
4. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 3, it is characterised in that：In magnesia
Cathode copper, fine silver, pure iron, Cu-5%Cr, Cu-10%Zr and Cu-3%B intermediate alloy are added in crucible, temperature is risen to 1200
~1250 DEG C, after copper copper fusing to be electrolysed, vacuumize, vacuum is less than 0.1Pa, and nitrogen is then passed through again, treat that melt melts completely
After change, cast after uniform stirring.
5. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 2, it is characterised in that：Described heat
The temperature rolled is 900~950 DEG C, and soaking time is 1~5h, and finishing temperature is 750~800 DEG C.
6. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 2, it is characterised in that：Described consolidates
Molten treatment temperature is 900~1000 DEG C, and soaking time is 1~4h, and the type of cooling is water cooling.
7. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 2, it is characterised in that：Described one
Secondary cold rolling working modulus is 70~90%.
8. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 2, it is characterised in that：When described
It is 400~500 DEG C to imitate treatment temperature, and soaking time is 4~10h, and the type of cooling is air cooling.
9. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 2, it is characterised in that：Described two
Secondary cold rolling working modulus is 50~70%.
10. the preparation method of copper alloy with high strength and high conductivity shielding material according to claim 2, it is characterised in that：Described
It is 400~600 DEG C to make annealing treatment temperature, and soaking time is 1~6h.
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| CN108441657A (en) * | 2018-01-30 | 2018-08-24 | 东莞市联洲知识产权运营管理有限公司 | A kind of preparation method of High Performance Shielding material |
| CN111394709B (en) * | 2020-04-30 | 2022-04-22 | 深圳市汉嵙新材料技术有限公司 | Metal-plated graphite sheet and preparation method thereof |
| CN111778417B (en) * | 2020-06-15 | 2021-05-14 | 陕西斯瑞新材料股份有限公司 | Preparation method of CuFeP alloy wire for shielding |
| CN112111670A (en) * | 2020-09-21 | 2020-12-22 | 江西理工大学 | Cu-Fe-Cr-Mg electromagnetic shielding material and preparation method thereof |
| CN113369473B (en) * | 2021-06-10 | 2023-05-12 | 盘星新型合金材料(常州)有限公司 | High-strength high-conductivity copper alloy powder and preparation method thereof |
| CN116411202A (en) * | 2021-12-29 | 2023-07-11 | 无锡市蓝格林金属材料科技有限公司 | Copper-tin alloy wire and preparation method thereof |
| CN114262817A (en) * | 2021-12-29 | 2022-04-01 | 无锡市蓝格林金属材料科技有限公司 | Conductor electromagnetic shielding copper-iron alloy wire and preparation method thereof |
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Effective date of registration: 20190621 Address after: 101407 No. 11 Xingke East Street, Yanqi Economic Development Zone, Huairou District, Beijing Patentee after: Research Institute of engineering and Technology Co., Ltd. Address before: No. 2, Xinjie street, Xicheng District, Beijing, Beijing Patentee before: General Research Institute for Nonferrous Metals |