CN111996412A - Cu-Al-Te heat conduction material and preparation method thereof - Google Patents

Cu-Al-Te heat conduction material and preparation method thereof Download PDF

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Publication number
CN111996412A
CN111996412A CN202010866999.3A CN202010866999A CN111996412A CN 111996412 A CN111996412 A CN 111996412A CN 202010866999 A CN202010866999 A CN 202010866999A CN 111996412 A CN111996412 A CN 111996412A
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billet
alloy
heat
bar
chips
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郭炜
谌昀
杨学兵
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Institute of Applied Physics of Jiangxi Academy of Sciences
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Institute of Applied Physics of Jiangxi Academy of Sciences
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • 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
    • B22F3/20—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces by extruding
    • 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
    • B22F8/00—Manufacture of articles from scrap or waste metal particles
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0408—Light metal alloys
    • C22C1/0416—Aluminium-based alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • C22C1/0425—Copper-based alloys
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/12—Alloys based on aluminium with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C30/00—Alloys containing less than 50% by weight of each constituent
    • C22C30/02—Alloys containing less than 50% by weight of each constituent containing copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
    • C22F1/057—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with copper as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
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  • Crystallography & Structural Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Of Metal (AREA)

Abstract

The invention relates to a preparation method of a Cu-Al-Te heat conduction material, belonging to the field of copper alloy. The material comprises the following components in percentage by weight: aluminum: 0.1-50.0%, tellurium: 0.1 to 5.0%, the balance being copper and unavoidable impurities. The preparation process of the material comprises the following steps: firstly, machining a pure Cu and Al-Te intermediate alloy into chips with a certain size, uniformly mixing the two chips according to a certain proportion, then putting the two chips into a steel mould, pressing the mixture for 30-55 s at room temperature under 500-790 MPa to obtain a billet, continuously pressing the billet for 35-60 s at 550-650 MPa and 550-650 ℃, taking out the billet, extruding the billet into a bar at 450-550 ℃ according to an extrusion ratio of 25-49: 1 and an extrusion speed of 0.2-0.6 mm/s, and finally carrying out vacuum annealing treatment on the bar at 200-400 ℃ for 0.5-2 h to obtain the high-strength high-heat-conductivity Cu-Al-Te alloy. The Cu-Al-Te alloy prepared by the invention does not need a melting process, and can greatly reduce the solid solution amount of Al and Te in Cu, thereby obviously improving the heat-conducting property of the alloy and widening the application range of the material.

Description

Cu-Al-Te heat conduction material and preparation method thereof
Technical Field
The invention belongs to the field of copper alloy, and relates to a preparation method of a Cu-Al-Te heat conduction material.
Background
The copper alloy has excellent electrical conductivity and mechanical property and is easy to deform, wherein the Cu-Al alloy is an important material widely applied in the industrial field, the cost is lower, the castability, the corrosion resistance and the impact resistance are good, but when the copper alloy is prepared by adopting a conventional fusion casting method, as the solid solubility of aluminum in copper at room temperature is higher (9.4 percent, mass fraction), the solid-dissolved aluminum atoms cause the distortion of copper matrix lattices to increase the scattering effect on electrons, the heat conductivity is obviously reduced, and how to more effectively reduce the solid-dissolved aluminum and other elements in the copper is the key for further improving the thermal conductivity of the Cu-Al alloy and expanding the application range of the material.
Disclosure of Invention
The invention aims to provide a method for preparing a Cu-Al-Te heat conduction material by adopting pure Cu and Al-Te master alloy cuttings.
The technical scheme of the invention is as follows:
a Cu-Al-Te heat conduction material comprises the following components in percentage by weight: aluminum: 0.1-50.0%, tellurium: 0.1 to 5.0% and the balance of Cu and unavoidable impurities, and a method for producing the same comprising the steps of,
(1) machining pure Cu and Al-Te master alloy: processing pure Cu into cuttings with the sizes of (0.01-12) mmx (0.01-5.1) mmx (0.01-1.62) mm by using a lathe, processing an Al-Te master alloy into cuttings with the sizes of (0.01-6.3) mmx (0.01-2.5) mmx (0.01-1.34) mm, and uniformly mixing the two cuttings according to a certain proportion;
(2) putting the mixed cuttings into a steel mould, and pressing for 30-55 s at room temperature under 500-790 MPa to obtain a billet;
(3) continuously pressing the billet for 35-60 s at 550-650 MPa and 550-650 ℃;
(4) taking out the billet, and extruding the billet into a bar at the temperature of 450-550 ℃ according to the extrusion ratio of 25-49: 1 and the extrusion speed of 0.2-0.6 mm/s;
(5) and (3) carrying out vacuum annealing treatment on the bar material at the temperature of 200-400 ℃ for 0.5-2 h to obtain the high-strength high-heat-conductivity Cu-Al-Te alloy.
Compared with the prior art, the invention has the following beneficial effects: the Cu-Al-Te alloy is prepared by plastic processing in a solid phase temperature range, a melting process is not needed, and the solid solution of Al and Te in Cu can be greatly reduced, so that the heat-conducting property of the alloy is obviously improved, the oxidation and burning loss of raw materials are effectively avoided, and the preparation method is energy-saving and environment-friendly and has accurate alloy components. In addition, due to cold pressing, hot pressing and hot extrusion in the preparation process, the alloy has large plastic deformation, the crystal grains are obviously refined, and the mechanical property can be also obviously improved.
Detailed Description
Example 1:
this example provides a method of making a Cu-47.5Al-2.5Te alloy, comprising the steps of:
(1) machining a pure Cu and Al-5Te master alloy: processing pure Cu into scraps with the size of 10mm multiplied by 4mm multiplied by 1.1mm by a lathe, processing the Al-5Te intermediate alloy into scraps with the size of 5mm multiplied by 2mm multiplied by 0.8mm, and uniformly mixing the two in a mass ratio of 1: 1;
(2) putting the mixed cuttings into a steel mould and pressing for 55s at the room temperature of 750MPa to obtain a billet;
(3) continuously pressing the billet for 60s at 650MPa and 650 ℃;
(4) taking out the billet, and extruding the billet into a bar at 550 ℃ according to an extrusion ratio of 49: 1 and an extrusion speed of 0.2 mm/s;
(5) and (3) carrying out vacuum annealing treatment on the bar material at 350 ℃ for 0.5h to obtain the high-strength high-heat-conductivity Cu-47.5Al-2.5Te alloy.
Example 2:
this example provides a method of making a Cu-19Al-1Te alloy, comprising the steps of:
(1) machining a pure Cu and Al-5Te master alloy: processing pure Cu into chips with the size of 8mm multiplied by 3mm multiplied by 0.6mm by a lathe, processing the Al-5Te intermediate alloy into chips with the size of 3mm multiplied by 1mm multiplied by 0.2mm, and uniformly mixing the two in a mass ratio of 4: 1;
(2) putting the mixed cuttings into a steel mould and pressing for 50s at the room temperature of 700MPa to obtain a billet;
(3) continuously pressing the billet for 55s at 600MPa and 600 ℃;
(4) taking out the billet, and extruding the billet into a bar at 500 ℃ according to the extrusion ratio of 36: 1 and the extrusion speed of 0.3 mm/s;
(5) and (3) annealing the bar at 300 ℃ to obtain the high-strength high-heat-conductivity Cu-19Al-1Te alloy.
Example 3:
this example provides a method of making a Cu-1.9Al-0.1Te alloy, comprising the steps of:
(1) machining a pure Cu and Al-5Te master alloy: processing pure Cu into chips with the size of 5mm multiplied by 1mm multiplied by 0.1mm by a lathe, processing the Al-5Te intermediate alloy into chips with the size of 2mm multiplied by 0.5mm multiplied by 0.1mm, and uniformly mixing the two in a mass ratio of 49: 1;
(2) putting the mixed cuttings into a steel mould and pressing for 45s at room temperature under 650MPa to obtain a billet;
(3) pressing the billet at 550MPa and 550 ℃ for 50 s;
(4) taking out the billet, and extruding the billet into a bar at 450 ℃ according to the extrusion ratio of 49: 1 and the extrusion speed of 0.5 mm/s;
(5) and (3) annealing the bar at 250 ℃ to obtain the high-strength high-heat-conductivity Cu-1.9Al-0.1Te alloy.

Claims (4)

1. The Cu-Al-Te heat conduction material is characterized by comprising the following components in percentage by weight: aluminum: 0.1-50.0%, tellurium: 0.1 to 5.0%, and the balance of Cu and unavoidable impurities.
2. A preparation method of a Cu-Al-Te heat conduction material is characterized by comprising the following steps:
(1) machining pure Cu and Al-Te intermediate alloy into cuttings, and uniformly mixing the two cuttings;
(2) putting the mixed cuttings into a steel mould, and pressing for 30-55 s at room temperature under 500-790 MPa to obtain a billet;
(3) continuously pressing the billet for 35-60 s at 550-650 MPa and 550-650 ℃;
(4) taking out the billet, and extruding the billet into a bar at the temperature of 450-550 ℃ according to the extrusion ratio of 25-49: 1 and the extrusion speed of 0.2-0.6 mm/s;
(5) and (3) carrying out vacuum annealing treatment on the bar material at the temperature of 200-400 ℃ for 0.5-2 h to obtain the high-strength high-heat-conductivity Cu-Al-Te alloy.
3. The method for producing a Cu-Al-Te thermally conductive material according to claim 2, wherein the size of the pure Cu chip is (0.01-12) mmX (0.01-5.1) mmX (0.01-1.62) mm.
4. The method for producing a Cu-Al-Te thermally conductive material according to claim 2, wherein the Al-Te master alloy chips have a size of (0.01-6.3) mmX (0.01-2.5) mmX (0.01-1.34) mm.
CN202010866999.3A 2020-08-21 2020-08-21 Cu-Al-Te heat conduction material and preparation method thereof Pending CN111996412A (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1930314A (en) * 2004-03-12 2007-03-14 住友金属工业株式会社 Copper alloy and process for producing the same
CN111519063A (en) * 2020-06-08 2020-08-11 江西省科学院应用物理研究所 Method for preparing Cu-Fe alloy by adopting copper scraps and scrap iron

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1930314A (en) * 2004-03-12 2007-03-14 住友金属工业株式会社 Copper alloy and process for producing the same
CN111519063A (en) * 2020-06-08 2020-08-11 江西省科学院应用物理研究所 Method for preparing Cu-Fe alloy by adopting copper scraps and scrap iron

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Application publication date: 20201127