CN102660695A - Copper wire and method for preparing shielding copper wire mesh - Google Patents
Copper wire and method for preparing shielding copper wire mesh Download PDFInfo
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- CN102660695A CN102660695A CN2012101116311A CN201210111631A CN102660695A CN 102660695 A CN102660695 A CN 102660695A CN 2012101116311 A CN2012101116311 A CN 2012101116311A CN 201210111631 A CN201210111631 A CN 201210111631A CN 102660695 A CN102660695 A CN 102660695A
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Abstract
The invention discloses a copper wire and a method for preparing a shielding copper wire mesh. The copper wire comprises the following ingredients: no larger than 0.0025 wt% of Si, no larger than 0.0025 wt% of Mn, no larger than 0.0025 wt% of Ni, no larger than 0.01 wt% of O, no larger than 0.005 wt% of Bi, no larger than 0.008 wt% of P, no larger than 0.008 wt% of S, no larger than 0.0025 wt% of Fe, no larger than 0.003 wt% of As, and the balance consisting of Cu and other inevitable impurities. The method comprises the following steps: a) weighing the ingredients according to the weight percentage; b) conducting vacuum induction melting; c) forging a copper blank; d) processing round bars; e) conducting solid solution treatment; f) annealing; g) drawing into wires; h) conducting bending molding; i) arranging inverted V-shaped skeletons; j) welding by precise resistance spot welding; k) shaping a copper wire mesh; l) conducting surface treatment of the copper wire mesh; and m) conducting heat setting. According to the invention, high purity cathode copper with the purity of no less than 99.99% is used as a raw material of the shielding copper wire mesh, and the impurities in the copper wire material are strictly controlled to guarantee the shielding effect of the shielding copper wire mesh.
Description
Technical field
The present invention relates to a kind of shielding copper mesh, particularly kind of copper wire and prepare the method that shields copper mesh.
Background technology
Wire cloth is according to the difference of material; It can be ordinary copper silk screen, Stainless Steel Cloth, aluminium net, copper mesh, brass screen, titanium net, molybdenum filament net, nickel chromium triangle silk screen etc.; Its forming mode adopts the braiding of metal or alloy silk mostly, and methods such as the excision forming of employing, electroless plating are also arranged.
Abroad aspect gauze screen; Successively adopted duraluminum, copper alloy to make anti-thunderbolt net; The aluminium net is because to have that electroconductibility and density are little preferably be the material that is used for anti-thunderbolt in the domestic and international aerospace always, but along with the application of carbon fibre reinforced composite, can the generation galvanic corrosion between traditional aluminium net and the thomel and influence its corrosion prevention and safety and reliability; Copper mesh is a substitute preferably at present, and adopts its electroconductibility of copper mesh to be superior to the copper mesh that traditional weaving is processed.
From nineteen forty-two, U.S. Xi Kesiji company first R4 vertiplane input has just begun the development work to the vertiplane gauze screen since using; The copper mesh area of plane is big, thin thickness, and the copper alloy filament diameter is little, requires this copper mesh and matrix material to closely cooperate during use, and its thickness and precision is had relatively high expectations, and requires nonmagnetic, good conductivity simultaneously, rigidity etc. is arranged; Require the moulding mesh even, smooth, the corrugationless of surperficial node has certain rigidity, so moulding is a difficult point.
Domestic copper mesh product adopts the copper wire braiding to form; Though what adopt on the material is red copper; But no matter from aspect and the external big in addition gaps of sample such as shape, pitch, silk material cross sections; And not only the following process finished product is had bigger quality influence by the copper mesh that this standards forms, main is because the disconnected sexual intercourse crunode of net that adopts this standards to form is many, directly influences the derivation of electric current; Under the such high pressure effect of thunder and lightning, be easy to the discharge of generation intersection and influence the rotor security.
It is reported; Domestic special development work of not carrying out little some precision resistance dot welding method making of filament copper mesh as yet; Also the process for machining and manufacturing of import copper mesh and the process for treating surface of copper mesh etc. are not furtherd investigate, this high-quality shielding copper mesh is still grasped in American-European developed country hand at present.
Summary of the invention
The object of the invention is exactly the deficiency to prior art, provides that a kind of anti-thunderbolt is effective, the copper wire of long service life and prepare the method that shields copper mesh.
For realizing above-mentioned purpose, the present invention adopts following technical scheme:
A kind of copper wire is characterized in that: its chemical ingredients is by weight percentage: Si≤0.0025 ﹪; Mn≤0.0025 ﹪; Ni≤0.0025 ﹪; O≤0.01 ﹪; Bi≤0.005%; P≤0.008%; S≤0.008%; Fe≤0.0025 ﹪; As≤0.003 ﹪, surplus is Cu and other impurity of unavoidably bringing into.
Preferably adopting purity is that >=99.99 Cu-CATH-1 is as feed proportioning.
Prepare the method that shields copper mesh with above-mentioned copper wire, it is characterized in that may further comprise the steps:
A), take by weighing each chemical ingredients by weight percentage;
B), vacuum induction melting;
Vacuum induction melting adopts 1 refinery practice;
Refining is under the temperature of (1230～1260) ± 5 ℃, and vacuum degree control is at 3～8Pa, and induction stirring is carried out in refining 10～20 minutes then, pours into copper ingot.
C), forge the copper base
The copper ingot that vacuum melting is obtained forges into the square billet that the cross section length of side is 40～80mm, through carrying out finishing after UT, the permeation flaw detection again; If the square billet cross section is too little, hot rolling is inconvenient;
D), processing circle bar
Copper base after the finishing is rolled into square billet the round bar of φ 8～φ 14mm under the temperature of (680～840) ± 5 ℃;
E), solution treatment
With above-mentioned round bar soaking time 30～60 minutes under 800 ± 10 ℃ temperature, carry out shrend then, the annealed processing of circle bar copper wire obtains the softening attitude blank of copper wire material;
F) annealing
Copper must carry out anneal eliminating peening in good time in the cold working process, the temperature of anneal is (800～840) ± 5 ℃; Temperature is higher than 900 ℃, and the serious alligatoring of the crystal grain of copper wire influences performance;
G), be drawn into silk
Copper wire material after returning goods is carried out repeatedly drawing with 40～70% degree of deformation each time, and last drawing deformation degree is controlled at 20～30%, and it is 0.1～1.0 millimeter copper wire that the copper wire material is drawn into diameter; Bending forming and the precision resistance spot welding point of being convenient to a material connect, and degree of deformation is too big, are inappropriate for bending and spot welding; Deformation states is little, because copper is softer, plasticity is good, when bending and spot welding point connect, causes distortion easily, can not satisfy the dimensional requirement of copper mesh;
H), bending forming
Copper wire after the drawing is converted into the skeleton of inverted v-shaped through automatic crimper;
I), the arrange skeleton of inverted v-shaped
The summit of the skeleton of inverted v-shaped is placed on same the straight line; And make the skeleton of each inverted v-shaped) spacing equate that the spacing between the skeleton of adjacent inverted v-shaped is 2.0～4.0, obtains lumpy; Have the broken line of a determining deviation, the pitch of waves, see Fig. 1;
J), precision resistance spot-welded on
Point of crossing mutual between the skeleton with inverted v-shaped is spot-welded together with the precision resistance spot welding machine, the voltage control 60～120V of spot welding machine, and current control is at 3～6A, and control voltage, electric current will be if the spot welding current overtension will cause the silk point to be fused into liquid state;
K), copper mesh shaping
The copper mesh that welding is good carries out shaping, adopts hydraulic tensioner, and the fixing distance of pressing makes copper mesh at the uniform velocity through between 2 block pressur plates, and rolls on cylinder;
L), copper mesh surface treatment
Adopting the solution of development configuration to carry out the surface treatment light handles: at first using mass percent concentration is 10% HCl aqueous solution soaking 5 minutes, uses then by the quality proportioning to be: the Cr of 2:1:7
2O
3+ H
2SO
4+ H
2The solution soaking of O 0.5～2 minute, copper mesh surface present very dazzling brilliant violet look;
M) typing thermal treatment
The copper mesh that rolls on frock, is put in the cartridge type hydrogen shield heat treatment furnace at 300 ℃, the thermal treatment of finalizing the design under 2 hours the condition, furnace cooling, to be cooled after room temperature, close hydrogen, promptly get and shield copper mesh.
Preferably, the angle at the top of the skeleton of said inverted v-shaped (1) is 90 °～150 °.
Table 1 the present invention shields copper mesh composition and gauze screen composition contrast both at home and abroad
Owing to adopted technique scheme; The shielding copper mesh is used for the required large-scale gauze screens of industry such as electronics, electromechanics; And the shielding copper mesh that is applied to Aeronautics and Astronautics, communication etc., owing to adopt the material of copper, effective, the long service life of anti-thunderbolt as gauze screen.
A kind of copper wire of the present invention and the beneficial effect for preparing the method that shields copper mesh thereof be, adopting purity be >=99.99 the Cu-CATH-1 feed proportioning as the shielding copper mesh, and the impurity during strict control is copper wire material used is to guarantee that shielding copper mesh is shield effectiveness.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Embodiment
Below in conjunction with accompanying drawing the present invention is further described, but does not therefore limit the present invention among the described scope of embodiments.
Embodiment 1
A kind of copper wire, its chemical ingredients is by weight percentage: Si≤0.0025 ﹪; Mn≤0.0025 ﹪; Ni≤0.0025 ﹪; O≤0.01 ﹪; Bi≤0.005%; P≤0.008%; S≤0.008%; Fe≤0.0025 ﹪; As≤0.003 ﹪, surplus is Cu and other impurity of unavoidably bringing into.
Prepare the method that shields copper mesh with above-mentioned copper wire, may further comprise the steps:
A), take by weighing each chemical ingredients by weight percentage;
B), vacuum induction melting;
Vacuum induction melting adopts 1 refinery practice;
Refining is under 1230 ± 5 ℃ temperature, and vacuum degree control is at 3Pa, and induction stirring is carried out in refining 10 minutes then, pours into copper ingot.
C), forge the copper base
The copper ingot that vacuum melting is obtained forges into the square billet that the cross section length of side is 40mm, through carrying out finishing after UT, the permeation flaw detection again; If the square billet cross section is too little, hot rolling is inconvenient;
D), processing circle bar
Copper base after the finishing is rolled into square billet the round bar of φ 8mm under 680 ± 5 ℃ temperature;
E), solution treatment
With above-mentioned round bar soaking time 30 minutes under 800 ± 10 ℃ temperature, carry out shrend then, the annealed processing of circle bar copper wire obtains the softening attitude blank of copper wire material;
F) annealing
Copper must carry out anneal to eliminate peening in good time in the cold working process, the temperature of anneal is 800 ± 5 ℃;
G), be drawn into silk
Copper wire material after returning goods is carried out repeatedly drawing with 40 degree of deformation each time, and last drawing deformation degree is controlled at 20%, and it is 0.1 millimeter copper wire that the copper wire material is drawn into diameter;
H), bending forming
Copper wire after the drawing is converted into the skeleton 1 of inverted v-shaped through automatic crimper, and the angle at the top of the skeleton 1 of said inverted v-shaped is 90 °;
I), the arrange skeleton of inverted v-shaped
Referring to Fig. 1, the summit of the skeleton 1 of inverted v-shaped is placed on same the straight line, and make the spacing of the skeleton 1 of each inverted v-shaped equate that the spacing between the skeleton 1 of adjacent inverted v-shaped is 2.0;
J), precision resistance spot-welded on
Point of crossing mutual between the skeleton 1 with inverted v-shaped is spot-welded together with the precision resistance spot welding machine, the voltage control 60V of spot welding machine, and current control is at 3A, and control voltage, electric current will be if the spot welding current overtension will cause the silk point to be fused into liquid state;
K), copper mesh shaping
The copper mesh that welding is good carries out shaping, adopts hydraulic tensioner, and the fixing distance of pressing makes copper mesh at the uniform velocity through between 2 block pressur plates, and rolls on cylinder;
L), copper mesh surface treatment
At first using mass percent concentration is 10% HCl aqueous solution soaking 5 minutes, uses then by the quality proportioning to be: the Cr of 2:1:7
2O
3+ H
2SO
4+ H
2The solution soaking of O 0.5 minute;
M) typing thermal treatment
The copper mesh that rolls on frock, is put in the cartridge type hydrogen shield heat treatment furnace at 300 ± 5 ℃, the thermal treatment of finalizing the design under 2 hours the condition, furnace cooling, to be cooled after room temperature, close hydrogen, promptly get and shield copper mesh.
Embodiment 2
Copper wire material used with embodiment 1;
Prepare the method that shields copper mesh with above-mentioned copper wire, may further comprise the steps:
A), take by weighing each chemical ingredients by weight percentage;
B), vacuum induction melting;
Vacuum induction melting adopts 1 refinery practice;
Refining is under 1260 ± 5 ℃ temperature, and vacuum degree control is at 8Pa, and induction stirring is carried out in refining 20 minutes then, pours into copper ingot.
C), forge the copper base
The copper ingot that vacuum melting is obtained forges into the square billet that the cross section length of side is 80mm, through carrying out finishing after UT, the permeation flaw detection again; If the square billet cross section is too little, hot rolling is inconvenient;
D), processing circle bar
Copper base after the finishing is rolled into square billet the round bar of φ 14mm under 840 ± 5 ℃ temperature;
E), solution treatment
With above-mentioned round bar soaking time 60 minutes under 800 ± 10 ℃ temperature, carry out shrend then, the annealed processing of circle bar copper wire obtains the softening attitude blank of copper wire material;
F) annealing
Copper must carry out anneal to eliminate peening in good time in the cold working process, the temperature of anneal is 840 ± 5 ℃;
G), be drawn into silk
Copper wire material after returning goods is carried out repeatedly drawing with 70% degree of deformation each time, and last drawing deformation degree is controlled at 30%, and it is 1.0 millimeters copper wire that the copper wire material is drawn into diameter;
H), bending forming
Copper wire after the drawing is converted into the skeleton 1 of inverted v-shaped through automatic crimper, and the angle at the top of the skeleton 1 of said inverted v-shaped is 120 °;
I), the arrange skeleton of inverted v-shaped
Referring to Fig. 1, the summit of the skeleton 1 of inverted v-shaped is placed on same the straight line, and make the spacing of the skeleton 1 of each inverted v-shaped equate that the spacing between the skeleton 1 of adjacent inverted v-shaped is 4.0mm;
J), precision resistance spot-welded on
Point of crossing mutual between the skeleton 1 with inverted v-shaped is spot-welded together with the precision resistance spot welding machine, the voltage control 120V of spot welding machine, and current control is at 6A, and control voltage, electric current will be if the spot welding current overtension will cause the silk point to be fused into liquid state;
K), copper mesh shaping
The copper mesh that welding is good carries out shaping, adopts hydraulic tensioner, and the fixing distance of pressing makes copper mesh at the uniform velocity through between 2 block pressur plates, and rolls on cylinder;
L), copper mesh surface treatment
At first using mass percent concentration is 10% HCl aqueous solution soaking 5 minutes, uses then by the quality proportioning to be: the Cr of 2:1:7
2O
3+ H
2SO
4+ H
2The solution soaking of O 2 minutes;
M) typing thermal treatment
The copper mesh that rolls on frock, is put in the cartridge type hydrogen shield heat treatment furnace at 300 ± 5 ℃, the thermal treatment of finalizing the design under 2 hours the condition, furnace cooling, to be cooled after room temperature, close hydrogen, promptly get and shield copper mesh.
Embodiment 3
Copper wire material used with embodiment 1;
Prepare the method that shields copper mesh with above-mentioned copper wire, may further comprise the steps:
A), take by weighing each chemical ingredients by weight percentage;
B), vacuum induction melting;
Vacuum induction melting adopts 1 refinery practice;
Refining is under 1245 ± 5 ℃ temperature, and vacuum degree control is at 5Pa, and induction stirring is carried out in refining 15 minutes then, pours into copper ingot.
C), forge the copper base
The copper ingot that vacuum melting is obtained forges into the square billet that the cross section length of side is 60mm, through carrying out finishing after UT, the permeation flaw detection again; If the square billet cross section is too little, hot rolling is inconvenient;
D), processing circle bar
Copper base after the finishing is rolled into square billet the round bar of 10mm under 750 ± 5 ℃ temperature;
E), solution treatment
With above-mentioned round bar soaking time 45 minutes under 800 ± 10 ℃ temperature, carry out shrend then, the annealed processing of circle bar copper wire obtains the softening attitude blank of copper wire material;
F) annealing
Copper must carry out anneal to eliminate peening in good time in the cold working process, the temperature of anneal is 820 ± 5 ℃;
G), be drawn into silk
Copper wire material after returning goods is carried out repeatedly drawing with 55% degree of deformation each time, and last drawing deformation degree is controlled at 25%, and it is 0.5 millimeter copper wire that the copper wire material is drawn into diameter;
H), bending forming
Copper wire after the drawing is converted into the skeleton 1 of inverted v-shaped through automatic crimper, and the angle at the top of the skeleton 1 of said inverted v-shaped is 150 °;
I), the arrange skeleton of inverted v-shaped
Referring to Fig. 1, the summit of the skeleton 1 of inverted v-shaped is placed on same the straight line, and make the spacing of the skeleton 1 of each inverted v-shaped equate that the spacing between the skeleton 1 of adjacent inverted v-shaped is 3.0mm;
J), precision resistance spot-welded on
Point of crossing mutual between the skeleton 1 with inverted v-shaped is spot-welded together with the precision resistance spot welding machine, the voltage control 90V of spot welding machine, and current control is at 5A, and control voltage, electric current will be if the spot welding current overtension will cause the silk point to be fused into liquid state;
K), copper mesh shaping
The copper mesh that welding is good carries out shaping, adopts hydraulic tensioner, and the fixing distance of pressing makes copper mesh at the uniform velocity through between 2 block pressur plates, and rolls on cylinder;
L), copper mesh surface treatment
At first using mass percent concentration is 10% HCl aqueous solution soaking 5 minutes, uses then by the quality proportioning to be: the Cr of 2:1:7
2O
3+ H
2SO
4+ H
2The solution soaking of O 1 minute;
M) typing thermal treatment
The copper mesh that rolls on frock, is put in the cartridge type hydrogen shield heat treatment furnace at 300 ± 5 ℃, the thermal treatment of finalizing the design under 2 hours the condition, furnace cooling, to be cooled after room temperature, close hydrogen, promptly get and shield copper mesh.
Though in conjunction with accompanying drawing embodiment of the present invention has been described; But those of ordinary skill in the art can make various distortion or modification within the scope of the appended claims; The technician of the industry should understand; The present invention is not restricted to the described embodiments, and that describes in the foregoing description and the specification sheets just explains principle of the present invention, under the prerequisite that does not break away from spirit and scope of the invention; The present invention also has various changes and modifications, and these variations and improvement all fall in the scope of the invention that requires protection; The present invention requires protection domain to be defined by appending claims and equivalent thereof.
Claims (3)
1. copper wire, it is characterized in that: its chemical ingredients is by weight percentage: Si≤0.0025 ﹪; Mn≤0.0025 ﹪; Ni≤0.0025 ﹪; O≤0.01 ﹪; Bi≤0.005%; P≤0.008%; S≤0.008%; Fe≤0.0025 ﹪; As≤0.003 ﹪, surplus is Cu and other impurity of unavoidably bringing into.
2. prepare the method that shields copper mesh with the said copper wire of claim 1, it is characterized in that may further comprise the steps:
A), take by weighing each chemical ingredients by weight percentage;
B), vacuum induction melting;
Vacuum induction melting adopts 1 refinery practice;
Refining is under the temperature of (1230～1260) ± 5 ℃, and vacuum degree control is at 3～8Pa, and induction stirring is carried out in refining 10～20 minutes then, pours into copper ingot;
C), forge the copper base
The copper ingot that vacuum melting is obtained forges into the square billet that the cross section length of side is 40～80mm, through carrying out finishing after UT, the permeation flaw detection again; If the square billet cross section is too little, hot rolling is inconvenient;
D), processing circle bar
Copper base after the finishing is rolled into square billet the round bar of φ 8～φ 14mm under the temperature of (680～840) ± 5 ℃;
E), solution treatment
With above-mentioned round bar soaking time 30～60 minutes under 800 ± 10 ℃ temperature, carry out shrend then, the annealed processing of circle bar copper wire obtains the softening attitude blank of copper wire material;
F) annealing
Copper must carry out anneal eliminating peening in good time in the cold working process, the temperature of anneal is (800～840) ± 5 ℃;
G), be drawn into silk
Copper wire material after returning goods is carried out repeatedly drawing with 40～70% degree of deformation each time, and last drawing deformation degree is controlled at 20～30%, and it is 0.1～1.0 millimeter copper wire that the copper wire material is drawn into diameter;
H), bending forming
Copper wire after the drawing is converted into the skeleton (1) of inverted v-shaped through automatic crimper;
I), the arrange skeleton of inverted v-shaped
The summit of the skeleton (1) of inverted v-shaped is placed on same the straight line; And the spacing of the skeleton (1) of each inverted v-shaped is equated; Spacing between the skeleton of adjacent inverted v-shaped (1) is 2.0～4.0, obtains lumpyly, has the broken line of a determining deviation, the pitch of waves;
J), precision resistance spot-welded on
Point of crossing mutual between the skeleton (1) with inverted v-shaped is spot-welded together with the precision resistance spot welding machine; Voltage control 60～the 120V of spot welding machine, current control is controlled voltage, electric current at 3～6A; If the spot welding current overtension will cause the silk point to be fused into liquid state;
K), copper mesh shaping
The copper mesh that welding is good carries out shaping, adopts hydraulic tensioner, and the fixing distance of pressing makes copper mesh at the uniform velocity through between 2 block pressur plates, and rolls on cylinder;
L), copper mesh surface treatment
At first using mass percent concentration is 10% HCl aqueous solution soaking 5 minutes, uses then by the quality proportioning to be: the Cr of 2:1:7
2O
3+ H
2SO
4+ H
2The solution soaking of O 0.5～2 minute;
M) typing thermal treatment
The copper mesh that rolls on frock, is put in the cartridge type hydrogen shield heat treatment furnace at 300 ± 5 ℃, the thermal treatment of finalizing the design under 2 hours the condition, furnace cooling, to be cooled after room temperature, close hydrogen, promptly get and shield copper mesh.
3. copper wire according to claim 2 prepares the method that shields copper mesh, it is characterized in that: the angle at the top of the skeleton of said inverted v-shaped (1) is 90 °～150 °.
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| CN201210111631.1A CN102660695B (en) | 2012-04-17 | 2012-04-17 | A kind of copper wire and prepare shielding copper mesh method |
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| CN201210111631.1A CN102660695B (en) | 2012-04-17 | 2012-04-17 | A kind of copper wire and prepare shielding copper mesh method |
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| CN103560120A (en) * | 2013-11-13 | 2014-02-05 | 北京达博有色金属焊料有限责任公司 | Chemical method palladium plating copper bonding wire and preparing method thereof |
| CN107522464A (en) * | 2017-10-11 | 2017-12-29 | 佛山慧创正元新材料科技有限公司 | The preparation method of wide warm graphene composite material |
| CN107546133A (en) * | 2017-09-11 | 2018-01-05 | 佛山慧创正元新材料科技有限公司 | The preparation method of soft anti-oxidant copper wire |
| CN108372261A (en) * | 2017-01-30 | 2018-08-07 | 集奥布鲁克有限公司 | The method of silk screen and helix for manufacturing silk screen |
| CN110016755A (en) * | 2019-04-28 | 2019-07-16 | 山东鲁普科技有限公司 | A kind of anti-lightning strike safety net and preparation method thereof |
| CN111745322A (en) * | 2020-05-22 | 2020-10-09 | 西安斯瑞先进铜合金科技有限公司 | Preparation method of novel copper-iron welding wire |
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| CN103560120A (en) * | 2013-11-13 | 2014-02-05 | 北京达博有色金属焊料有限责任公司 | Chemical method palladium plating copper bonding wire and preparing method thereof |
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| CN107546133A (en) * | 2017-09-11 | 2018-01-05 | 佛山慧创正元新材料科技有限公司 | The preparation method of soft anti-oxidant copper wire |
| CN107522464A (en) * | 2017-10-11 | 2017-12-29 | 佛山慧创正元新材料科技有限公司 | The preparation method of wide warm graphene composite material |
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| CN110016755B (en) * | 2019-04-28 | 2024-04-12 | 山东鲁普科技有限公司 | Lightning protection safety net and manufacturing method thereof |
| CN111745322A (en) * | 2020-05-22 | 2020-10-09 | 西安斯瑞先进铜合金科技有限公司 | Preparation method of novel copper-iron welding wire |
| CN111876626A (en) * | 2020-07-16 | 2020-11-03 | 中南大学 | High-electromagnetic-shielding high-strength high-conductivity CuFeSiCr alloy and preparation method thereof |
| CN111876626B (en) * | 2020-07-16 | 2021-08-03 | 中南大学 | High-electromagnetic-shielding high-strength high-conductivity CuFeSiCr alloy and preparation method thereof |
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