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Preparation method for Al2O3 dispersion-strengthened Cu/Cr composite material

A composite material and dispersion strengthening technology, which is applied in the field of preparation of Al2O3 dispersion strengthened Cu/Cr composite materials, can solve the problems of the uniform and stable suspension of the composite electrodeposition method, which is difficult to control, and the size limit of the composite material products, and achieves the distribution of microstructures. The effect of uniformity, shortening production cycle and reducing cost

Inactive Publication Date: 2014-07-16
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these new technologies still have certain limitations in application, for example, the uniform and stable suspension of composite electrodeposition particles in the plating solution is not easy to control, and the Al in the product 2 o 3 Content and composite product size are limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] a kind of Al 2 o 3 A method for preparing a dispersion strengthened Cu / Cr composite material, the method comprising the steps of:

[0025] 1) Weigh low solid solubility rare earth Cu-Al alloy powder, Cr powder and Cu 2 O, and mix it uniformly; wherein the composition of the low solid solubility rare earth Cu-Al alloy powder is calculated by weight percentage: aluminum 0.3%, Ce: 0.3%, the balance is Cu, and the particle size is -200 mesh; Cr powder It is industrially pure, with a particle size of -200 mesh; Cu 2 O is industrially pure, with a particle size of -150 mesh to +320 mesh, and the mixing ratio by weight of low solid solubility rare earth Cu-Al alloy powder and Cr powder is 5:1; low solid solubility rare earth Cu-Al alloy powder and Cu 2 The mixing weight ratio of O is 12:1.

[0026] 2) The mixed powder is internally oxidized; the temperature is 840° C., and the time is 20 hours; then it is crushed and sieved; the powder under the sieve of -150 mesh is taken...

Embodiment 2

[0031] a kind of Al 2 o 3 A method for preparing a dispersion strengthened Cu / Cr composite material, the method comprising the steps of:

[0032] 1) Weigh low solid solubility rare earth Cu-Al alloy powder, Cr powder and Cu 2 O, and mix it uniformly; wherein the composition of the low solid solubility rare earth Cu-Al alloy powder is calculated by weight percentage: aluminum 0.5%, Ce: 0.2%, the balance is Cu, and the particle size is -200 mesh; Cr powder It is industrially pure, with a particle size of -200 mesh; Cu 2 O is industrially pure, with a particle size of -150 mesh to +320 mesh. The mixed weight ratio of low solid solubility rare earth Cu-Al alloy powder and Cr powder is 7:1; low solid solubility rare earth Cu-Al alloy powder and Cu 2 The mixing weight ratio of O is 10:1.

[0033] 2) The mixed powder is internally oxidized; the temperature is 860° C., and the time is 16 hours; then it is crushed and sieved; the powder under the sieve of -150 mesh is taken.

[00...

Embodiment 3

[0038] a kind of Al 2 o 3 A method for preparing a dispersion strengthened Cu / Cr composite material, the method comprising the steps of:

[0039] 1) Weigh low solid solubility rare earth Cu-Al alloy powder, Cr powder and Cu 2 O, and mix it uniformly; wherein the composition of the low solid solubility rare earth Cu-Al alloy powder is calculated by weight percentage: aluminum 0.4%, Ce: 0.25%, the balance is Cu, and the particle size is -200 mesh; Cr powder It is industrially pure, with a particle size of -200 mesh; Cu 2 O is industrially pure, with a particle size of -150 mesh to +320 mesh, and the mixing ratio of low solid solubility rare earth Cu-Al alloy powder and Cr powder is 6:1; low solid solubility rare earth Cu-Al alloy powder and Cu 2 The mixing weight ratio of O is 11:1.

[0040] 2) The mixed powder is internally oxidized; the temperature is 850° C., and the time is 18 hours; then it is crushed and sieved; the powder under the sieve of -150 mesh is taken.

[004...

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Abstract

The invention discloses a preparation method for an Al2O3 dispersion-strengthened Cu / Cr composite material. The method comprises the following steps of: 1) weighing and uniformly mixing low-solid solubility rare earth Cu-Al alloy powder, Cr powder and Cu2O, wherein the ratio of weight parts of the low-solid solubility rare earth Cu-Al alloy powder to weight parts of the Cr powder is (5-7):1, and the ratio of the weight parts of the low-solid solubility rare earth Cu-Al alloy powder to weight parts of the Cu2O is (10-12):1; 2) performing internal oxidation for 16 to 20 hours at temperature of 840 to 860 DEG C, crushing and sieving a powder mixture, and taking undersize powder of -150 meshes; 3) performing hydrogen reduction for about 2 to 3 hours at reduction temperature of about 820 to 840 DEG C; 4) pressing the treated powder into a cylindrical blank under pressing pressure of 320 to 350 MPa in a cold isostatic press; and 5) placing the cylindrical blank obtained by the step 4) into a forging and pressing die, and forging and pressing forming the cylindrical blank at 780 to 860 DEG C.

Description

technical field [0001] The invention relates to the technical field of copper alloy composite materials, in particular to an Al 2 o 3 A preparation method of dispersion strengthened Cu / Cr composite material. Background technique [0002] Al 2 o 3 Dispersion strengthened copper alloy is a new type of structural functional material with excellent comprehensive physical properties and mechanical properties. It has broad application prospects in the fields of modern electronic technology and electrical engineering. With the development of the electronic industry, it has become one of the research hotspots of copper alloy materials. one. Cu-Al 2 o 3 There are many preparation processes for composite materials, among which the internal oxidation method of Cu-Al alloy powder is the current large-scale preparation of Cu-Al with excellent performance. 2 o 3 Composite materials are more mature methods. The common technical process is: smelting Cu-Al alloy→Cu-Al alloy powder (...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C9/00C22C32/00C22F1/08
Inventor 沈淼胡晓玲
Owner STATE GRID CORP OF CHINA
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