CN114921634A - Copper-chromium composite material and preparation method thereof - Google Patents
Copper-chromium composite material and preparation method thereof Download PDFInfo
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- CN114921634A CN114921634A CN202210568457.7A CN202210568457A CN114921634A CN 114921634 A CN114921634 A CN 114921634A CN 202210568457 A CN202210568457 A CN 202210568457A CN 114921634 A CN114921634 A CN 114921634A
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- 239000002131 composite material Substances 0.000 title claims abstract description 69
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 58
- 229910052802 copper Inorganic materials 0.000 claims abstract description 58
- 239000010949 copper Substances 0.000 claims abstract description 58
- 238000005096 rolling process Methods 0.000 claims abstract description 58
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000010438 heat treatment Methods 0.000 claims abstract description 32
- 238000000137 annealing Methods 0.000 claims abstract description 8
- 239000012298 atmosphere Substances 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims abstract description 5
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 26
- 230000009467 reduction Effects 0.000 claims description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 238000004506 ultrasonic cleaning Methods 0.000 claims description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical group Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 10
- 239000012300 argon atmosphere Substances 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- 238000005554 pickling Methods 0.000 claims description 5
- 238000005498 polishing Methods 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 235000019441 ethanol Nutrition 0.000 claims description 4
- 238000002791 soaking Methods 0.000 claims description 4
- 244000137852 Petrea volubilis Species 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 2
- 229910000881 Cu alloy Inorganic materials 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 3
- 238000009776 industrial production Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 description 6
- 238000005303 weighing Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 5
- 229910045601 alloy Inorganic materials 0.000 description 3
- 239000000956 alloy Substances 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 238000010587 phase diagram Methods 0.000 description 2
- 229910000599 Cr alloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 239000000788 chromium alloy Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 239000002905 metal composite material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000001878 scanning electron micrograph Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/18—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by using pressure rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F7/00—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression
- B22F7/02—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers
- B22F7/04—Manufacture of composite layers, workpieces, or articles, comprising metallic powder, by sintering the powder, with or without compacting wherein at least one part is obtained by sintering or compression of composite layers with one or more layers not made from powder, e.g. made from solid metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
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Abstract
The invention relates to the technical field of copper alloy preparation, and particularly discloses a copper-chromium composite material and a preparation method thereof. The preparation method of the copper-chromium composite material comprises the following steps: a. carrying out heat treatment on two copper plates with the same size in a protective atmosphere, and then removing an oxide layer to obtain a pretreated copper plate; b. taking out one pretreated copper plate, uniformly paving chromium powder on the pretreated copper plate, and covering the other pretreated copper plate on the chromium powder to obtain a three-layer sandwich composite structure; c. carrying out first rolling on the three-layer sandwich composite structure, annealing the first rolled plate, and then carrying out second rolling; and carrying out heat treatment on the second rolled plate, and then carrying out third rolling to obtain the copper-chromium composite material. The preparation method of the copper-chromium composite material provided by the invention is simple, low in cost, green and environment-friendly, high in production efficiency, capable of producing large-size materials, and easy to realize industrial production, and the obtained copper-chromium composite material has high conductivity and high tensile strength.
Description
Technical Field
The invention relates to the technical field of copper alloy preparation, in particular to a copper-chromium composite material and a preparation method thereof.
Background
In recent years, copper and copper alloys have become more and more widely used in innovative industrial fields such as information technology, aviation aircrafts and equipment, advanced rail transit facilities, resource conservation, new energy automobiles and the like. At present, the related fields of traffic and electronics in China are rapidly developed, and the performance standard requirement of the copper alloy wire is higher and higher. The fields which are often involved in the daily lives of railways and aerospace are developed without leaving high-quality alloys. Copper-chromium alloys are among the alloys that can meet their needs. The copper alloy is used as a structural and functional integrated material integrating excellent physical properties and strong comprehensive mechanical properties, can be used as an alloy for contact wires, can also be widely applied to materials such as power cable lead connectors, resistors and the like, welding devices such as welding preparation of generators and metal composite devices and molds and the like, and can be used as various high-strength and low-conductivity welding equipment such as novel overhead welding leads for electric locomotives, integrated circuit vacuum lead welding frames, vacuum switches for vehicles, contact heads and the like.
However, the conventional copper-based composite material also has certain defects in the application process, for example, the strength and the conductivity of the conventional copper-based composite material cannot be simultaneously considered, so that the application of the conventional copper-based composite material in the aspects of electronics, electric power, communication, high-speed rail and the like is greatly limited. Most of the copper alloys developed at present sacrifice their tensile strength in order to obtain higher conductivity.
Disclosure of Invention
Aiming at the problems of the existing copper alloy, the invention provides a copper-chromium composite material and a preparation method thereof.
In order to achieve the purpose of the invention, the embodiment of the invention adopts the following technical scheme:
a preparation method of a copper-chromium composite material comprises the following steps:
a. heating two copper plates with the same size to 550-650 ℃ in protective atmosphere for heat treatment, and then removing oxide layers on the surfaces of the copper plates to obtain two pretreated copper plates;
b. taking out one piece of the pretreatment copper plate, cleaning chromium powder, uniformly paving the cleaned chromium powder on the pretreatment copper plate, and then covering the other piece of the pretreatment copper plate on the chromium powder to obtain a three-layer sandwich composite structure;
c. carrying out first rolling on the three-layer sandwich composite structure, wherein the rolling reduction of the first rolling is 25-35%, so as to obtain a first rolled plate; heating the first rolled plate to 850-950 ℃ for annealing, and then performing second rolling, wherein the rolling reduction of the second rolling is 33-54%, so as to obtain a second rolled plate; and heating the second rolled plate to 240-500 ℃ for heat treatment, and then carrying out third rolling, wherein the rolling reduction of the third rolling is 17-30%, so as to obtain the copper-chromium composite material.
Compared with the prior art, the preparation method of the copper-chromium composite material provided by the invention is different from the traditional smelting method, has the advantages of simple preparation method, low cost, safe operation, environmental protection and high production rate, can meet the preparation requirement of large-size copper-chromium composite materials, and is easy to realize industrial production. Meanwhile, according to the preparation method of the copper-chromium composite material, the addition amount and the superposition mode of the copper plate and the chromium powder are set, and the setting of the rolling reduction amount for three times and the heat treatment process for three times in different periods are combined, so that the finally obtained copper-chromium composite material has high tensile strength and high conductivity and good microhardness, the defect that the strength and the conductivity of the traditional copper-based composite material cannot be considered at the same time is overcome, and the application of the copper-based composite material in the fields of electronics, electric power, communication and high-speed rail is widened.
Preferably, in step a, the protective atmosphere is an argon atmosphere.
Preferably, in step a, the heat treatment time is 0.5h-2 h.
Preferably, in the step a, the removing method of the oxide layer includes: and sequentially carrying out mechanical polishing, acid washing, acetone washing and alcohol washing on the copper plate.
Preferably, the mechanical grinding is to grind the copper plate by using 180-200 mesh sand paper.
Preferably, the copper plate is soaked in an acid pickling agent, wherein the acid pickling agent is a hydrochloric acid solution with the concentration of 5-20 wt.%.
Preferably, the acetone washing method is to put the copper plate into acetone and perform ultrasonic cleaning for 10min to 15 min.
Preferably, the alcohol washing method is to add the copper plate into absolute ethyl alcohol and perform ultrasonic cleaning for 10min to 15 min.
Preferably, in the step b, the mass content of chromium powder in the three-layer sandwich composite structure is 0.1-2.0%.
Preferably, in the step b, the particle size of the chromium powder is 2-4 μm.
Preferably, in the step b, the method for cleaning the chromium powder comprises the following steps: the method comprises the steps of firstly adding the chromium powder into acetone for ultrasonic cleaning for 10-15 min, and then adding the chromium powder into absolute ethyl alcohol for ultrasonic cleaning for 10-15 min.
Preferably, in step c, the annealing time is 50-90 min.
Preferably, in step c, the time of the heat treatment is 5min to 30 min.
Preferably, in the step c, the speed of the first rolling, the second rolling and the third rolling is 0.5m/min-1 m/min.
The invention also provides a copper-chromium composite material prepared by the preparation method of the copper-chromium composite material.
Drawings
FIG. 1 is a process flow diagram for preparing a copper-chromium composite material in example 1 of the present invention;
FIG. 2 is a 100-fold metallographic photograph of a copper-chromium composite material prepared in example 1 of the present invention;
FIG. 3 is a scanning electron micrograph of the copper-chromium composite prepared in example 1 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
A preparation method of a copper-chromium composite material comprises the following steps:
a. cutting a high-purity copper plate (100X 0.5mm) into a size of 50X 33X 0.5mm by using a plate shearing machine; placing the sheared copper plate in a vacuum tube type heat treatment furnace, introducing industrial pure argon atmosphere, heating to 550 ℃, and carrying out heat preservation treatment for 2 hours; then sequentially polishing the surface of the copper plate by using 180-mesh sand paper, soaking in 5 wt.% hydrochloric acid solution, ultrasonically cleaning with acetone for 10min, and ultrasonically cleaning with absolute ethyl alcohol for 10min to obtain a pretreated copper plate;
b. firstly, adding chromium powder (with the particle size of 2-4 microns) into acetone for ultrasonic cleaning for 10min, then adding into absolute ethyl alcohol for ultrasonic cleaning for 10min, removing oil stains on the surface, and drying by using a drying oven for later use; taking out two pretreated copper plates for weighing, simultaneously weighing chromium powder, uniformly spreading the chromium powder on one copper plate by using a sieve, and covering the other copper plate on the chromium powder to obtain a three-layer sandwich composite structure, wherein the mass ratio of the chromium powder in the three-layer sandwich composite structure is 2%;
c. using rolling equipment, setting the rolling speed to be 0.5m/min, carrying out first rolling on the three-layer sandwich composite structure, wherein the rolling reduction is 25%, and obtaining a first rolled plate; heating the first rolled plate to 850 ℃ for annealing treatment for 90min, and then carrying out second rolling, wherein the rolling reduction of the second rolling is 33%, so as to obtain a second rolled plate; and heating the second rolled plate to 240 ℃ for heat treatment for 30min, and then carrying out third rolling, wherein the rolling reduction of the third rolling is 17%, so as to obtain the copper-chromium composite material. The process flow for preparing the copper-chromium composite material is shown in figure 1.
By observing a gold phase diagram (shown in figure 2) and a scanning electron microscope diagram (shown in figure 3) of the prepared copper-chromium composite material, the gold phase diagram and the scanning electron microscope diagram show that in the copper-chromium composite material, the chromium powder is well combined with the copper plates, no obvious gap is formed between the two copper plates, and the chromium powder is uniformly dispersed. The performance of the obtained copper-chromium composite material is detected, the tensile strength is 340.78MPa, the electric conductivity is 81.07 percent IACS, and the microhardness is 134.8 HV. The tensile strength of the copper-chromium composite material is improved by about 40 percent compared with that of pure copper.
Example 2
A preparation method of a copper-chromium composite material comprises the following steps:
a. cutting a high-purity copper plate (100X 0.5mm) into a size of 50X 33X 0.5mm by using a plate shearing machine; placing the sheared copper plate in a vacuum tube type heat treatment furnace, introducing industrial pure argon atmosphere, heating to 600 ℃, and carrying out heat preservation treatment for 1 h; then sequentially polishing the surface of the copper plate by using 200-mesh abrasive paper, soaking in 10 wt.% hydrochloric acid solution, ultrasonically cleaning with acetone for 12min, and ultrasonically cleaning with absolute ethyl alcohol for 12min to obtain a pretreated copper plate;
b. firstly, adding chromium powder (with the particle size of 2-4 microns) into acetone for ultrasonic cleaning for 12min, then adding into absolute ethyl alcohol for ultrasonic cleaning for 12min, removing oil stains on the surface, and drying by using a drying oven for later use; taking out two pretreated copper plates for weighing, simultaneously weighing chromium powder, uniformly spreading the chromium powder on one copper plate by using a sieve, and covering the other copper plate on the chromium powder to obtain a three-layer sandwich composite structure, wherein the mass ratio of the chromium powder in the three-layer sandwich composite structure is 1%;
c. rolling the three-layer sandwich composite structure for the first time at a rolling speed of 0.8m/min by using rolling equipment, wherein the rolling reduction is 30% to obtain a first-time rolled plate; heating the first rolled plate to 900 ℃ for annealing treatment for 80min, and then carrying out second rolling, wherein the rolling reduction of the second rolling is 40%, so as to obtain a second rolled plate; and heating the second rolled plate to 350 ℃ for heat treatment for 20min, and then carrying out third rolling, wherein the rolling reduction of the third rolling is 25%, so as to obtain the copper-chromium composite material.
The performance of the obtained copper-chromium composite material is detected, the tensile strength is 302.88MPa, the electric conductivity is 81.39% IACS, and the microhardness is 134.4 HV.
Example 3
A preparation method of a copper-chromium composite material comprises the following steps:
a. cutting a high-purity copper plate (100X 0.5mm) into a size of 50X 33X 0.5mm by using a plate shearing machine; placing the sheared copper plate in a vacuum tube type heat treatment furnace, introducing industrial pure argon atmosphere, heating to 650 ℃, and carrying out heat preservation treatment for 0.5 h; sequentially polishing the surface of the copper plate by using 180-mesh abrasive paper, soaking in 20 wt.% hydrochloric acid solution, ultrasonically cleaning with acetone for 15min, and ultrasonically cleaning with absolute ethyl alcohol for 15min to obtain a pretreated copper plate;
b. firstly, adding chromium powder (with the particle size of 2-4 microns) into acetone for ultrasonic cleaning for 15min, then adding into absolute ethyl alcohol for ultrasonic cleaning for 15min, removing oil stains on the surface, and drying by using a drying oven for later use; taking out two pretreated copper plates for weighing, simultaneously weighing chromium powder, uniformly spreading the chromium powder on one copper plate by using a sieve, and covering the other copper plate on the chromium powder to obtain a three-layer sandwich composite structure, wherein the mass ratio of the chromium powder in the three-layer sandwich composite structure is 0.1%;
c. using rolling equipment, setting the rolling speed to be 0.8m/min, carrying out first rolling on the three-layer sandwich composite structure, wherein the rolling reduction is 35%, and obtaining a first rolled plate; heating the first rolled plate to 950 ℃ for annealing treatment for 50min, and then carrying out second rolling, wherein the rolling reduction of the second rolling is 54%, so as to obtain a second rolled plate; and heating the second rolled plate to 500 ℃ for heat treatment for 5min, and then carrying out third rolling, wherein the rolling reduction of the third rolling is 30%, so as to obtain the copper-chromium composite material.
The properties of the obtained copper-chromium composite material were measured, and the tensile strength was 298.24MPa, the electrical conductivity was 81.32% IACS, and the microhardness was 131.5 HV.
As can be seen from the performance test data of the copper-chromium composite materials prepared in the embodiments 1 to 3, the copper-chromium composite material obtained by the invention has high tensile strength and electric conductivity and excellent service performance.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A preparation method of a copper-chromium composite material is characterized by comprising the following steps: the method comprises the following steps:
a. heating two copper plates with the same size to 550-650 ℃ in protective atmosphere for heat treatment, and then removing oxide layers on the surfaces of the copper plates to obtain two pretreated copper plates;
b. taking out one piece of the pretreatment copper plate, cleaning chromium powder, uniformly paving the cleaned chromium powder on the pretreatment copper plate, and then covering the other piece of the pretreatment copper plate on the chromium powder to obtain a three-layer sandwich composite structure;
c. carrying out first rolling on the three-layer sandwich composite structure, wherein the rolling reduction of the first rolling is 25% -35%, so as to obtain a first rolled plate; heating the first rolled plate to 850-950 ℃ for annealing, and then performing second rolling, wherein the rolling reduction of the second rolling is 33-54%, so as to obtain a second rolled plate; and heating the second rolled plate to 240-500 ℃ for heat treatment, and then carrying out third rolling, wherein the rolling reduction of the third rolling is 17-30%, so as to obtain the copper-chromium composite material.
2. The method of preparing a copper-chromium composite material according to claim 1, characterized in that: in the step a, the protective atmosphere is argon atmosphere.
3. The method of preparing a copper-chromium composite material according to claim 1, characterized in that: in the step a, the heat treatment time is 0.5h-2 h.
4. The method of producing a copper-chromium composite material according to claim 1, characterized in that: in the step a, the method for removing the oxide layer comprises the following steps: and sequentially carrying out mechanical polishing, acid washing, acetone washing and alcohol washing on the copper plate.
5. The method of preparing a copper-chromium composite material according to claim 4, wherein: the mechanical grinding is to grind the copper plate by using 180-200-mesh sand paper;
and/or the pickling method comprises the steps of soaking the copper plate in a pickling agent, wherein the pickling agent is a hydrochloric acid solution with 5-20 wt%;
and/or the method for washing the acetone is to put the copper plate into the acetone and carry out ultrasonic cleaning for 10min to 15 min;
and/or the method for washing by the alcohol is to add the copper plate into absolute ethyl alcohol and carry out ultrasonic cleaning for 10min to 15 min.
6. The method of preparing a copper-chromium composite material according to claim 1, characterized in that: in the step b, the mass content of the chromium powder in the three-layer sandwich composite structure is 0.1-2.0%.
7. The method of producing a copper-chromium composite material according to claim 1, characterized in that: in the step b, the particle size of the chromium powder is 2-4 μm;
and/or in the step b, the cleaning method of the chromium powder comprises the following steps: the method comprises the steps of firstly adding the chromium powder into acetone for ultrasonic cleaning for 10min-15min, and then adding the chromium powder into absolute ethyl alcohol for ultrasonic cleaning for 10min-15 min.
8. The method of preparing a copper-chromium composite material according to claim 1, characterized in that: in the step c, the annealing time is 50-90 min;
and/or in the step c, the time of the heat treatment is 5min-30 min.
9. The method of preparing a copper-chromium composite material according to claim 1, characterized in that: in the step c, the speed of the first rolling, the second rolling and the third rolling is 0.5m/min-1 m/min.
10. A copper-chromium composite obtainable by the process for the preparation of a copper-chromium composite as claimed in any one of claims 1 to 9.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1212681A (en) * | 1966-11-18 | 1970-11-18 | British Iron Steel Research | Process for the production of metal strip from powdered metal |
| CN102632237A (en) * | 2012-05-17 | 2012-08-15 | 河南理工大学 | Method for manufacturing pure copper/ copper-chromium alloy composite contact material by spray deposition |
| CN102974642A (en) * | 2012-11-19 | 2013-03-20 | 湖州市银鑫轧辊有限公司 | Composite sheet material processing method |
| DE102016208485A1 (en) * | 2016-05-18 | 2017-11-23 | Federal-Mogul Wiesbaden Gmbh | Process for the production of sliding bearing composite materials, sliding bearing composite material and sliding element made of such sliding bearing composite materials |
| CN109808258A (en) * | 2019-03-13 | 2019-05-28 | 哈尔滨工程大学烟台研究院 | Diamond layer-paved copper-based high-thermal-conductivity composite material and preparation method thereof |
-
2022
- 2022-05-23 CN CN202210568457.7A patent/CN114921634B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1212681A (en) * | 1966-11-18 | 1970-11-18 | British Iron Steel Research | Process for the production of metal strip from powdered metal |
| CN102632237A (en) * | 2012-05-17 | 2012-08-15 | 河南理工大学 | Method for manufacturing pure copper/ copper-chromium alloy composite contact material by spray deposition |
| CN102974642A (en) * | 2012-11-19 | 2013-03-20 | 湖州市银鑫轧辊有限公司 | Composite sheet material processing method |
| DE102016208485A1 (en) * | 2016-05-18 | 2017-11-23 | Federal-Mogul Wiesbaden Gmbh | Process for the production of sliding bearing composite materials, sliding bearing composite material and sliding element made of such sliding bearing composite materials |
| CN109808258A (en) * | 2019-03-13 | 2019-05-28 | 哈尔滨工程大学烟台研究院 | Diamond layer-paved copper-based high-thermal-conductivity composite material and preparation method thereof |
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