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High conductivity and high wear resistance copper-molybdenum alloy material and preparation method thereof

A technology of copper-molybdenum alloy and high conductivity, which is applied in the field of copper-molybdenum alloy materials and its preparation, can solve the problems that copper-based alloys and molybdenum alloys cannot achieve, and achieve the best material performance, excellent performance, and easy control.

Inactive Publication Date: 2013-03-20
HENAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] It can be seen from the above research that the copper-based alloys and molybdenum alloys currently studied cannot meet the following performance indicators: the tensile strength of the alloy material is >400MPa, the hardness is >90HB, and under the conditions of high-speed sliding and high current (speed greater than 300m / s , current greater than 1kA) material friction coefficient <0.2, electrical conductivity ≥ 70% IACS
Among various copper-based and molybdenum-based materials, materials with such excellent high electrical conductivity and high wear resistance have not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A copper-molybdenum alloy material with high conductivity and high wear resistance and its preparation method: the raw materials used are: containing A l2 o 3 Cu powder, MoS 2 powder, pure molybdenum powder; the specific ratio of the mass fraction of each component is as follows:

[0039] Al 2 o 3 : 0.1%

[0040] MoS 2 : 0.1%

[0041] Mo: 1%

[0042] The rest is Cu, and the impurity content is <0.1%.

[0043] Put the above-mentioned powders mixed in proportion into the stainless steel grinding tank of the high-energy ball mill, and mix and run for 15 hours. During the powder mixing and grinding process, vacuum operation, vacuum degree 10 -2 Pa, filled with dry Ar gas for protection, the speed is 1400r / min;

[0044] The mixed powder after high-energy ball milling is pre-pressed under a 100T press, and the pressure is maintained for 10 minutes;

[0045] The pre-pressed blank is pressed on a cold isostatic press with a pressure of 180 MPa and a pre...

Embodiment 2

[0048] What this embodiment prepares is the copper-molybdenum alloy material with high conductivity and high wear resistance, and the raw materials used are: containing Al 2 o 3 Cu powder, MoS 2 powder, pure molybdenum powder; the specific ratio of the mass fraction of each component is as follows:

[0049] Al 2 o 3 : 0.2%

[0050] MoS 2 : 0.2%

[0051] Mo: 2%

[0052] The rest is Cu, and the impurity content is less than 0.1%.

[0053] Put the above-mentioned powders mixed in proportion into the stainless steel grinding tank of the high-energy ball mill, and mix and run for 20 hours. During the powder mixing and grinding process, vacuum operation, vacuum degree 10 -3 Pa, filled with dry Ar gas for protection, the speed is 1500r / min;

[0054] The mixed powder after high-energy ball milling is pre-pressed under a 100T press, and the pressure is maintained for 10 minutes;

[0055] The pre-pressed blank is pressed on a cold isostatic press with a pressure...

Embodiment 3

[0058] What this embodiment prepares is the copper-molybdenum alloy material with high conductivity and high wear resistance, and the raw materials used are: containing Al 2 o 3 Cu powder, MoS 2 powder, pure molybdenum powder; the specific ratio of the mass fraction of each component is as follows:

[0059] Al 2 o 3 : 0.3%

[0060] MoS 2 : 0.3%

[0061] Mo: 3%

[0062] The rest is Cu, and the impurity content is less than 0.1%.

[0063] Put the above-mentioned powders mixed in proportion into the stainless steel grinding tank of the high-energy ball mill, and mix and run for 22 hours. During the powder mixing and grinding process, vacuum operation, vacuum degree 10 -3 Pa, filled with dry Ar gas for protection, the speed is 1600r / min;

[0064] The mixed powder after high-energy ball milling is pre-pressed under a 100T press, and the pressure is maintained for 12 minutes;

[0065] The pre-pressed blank is pressed on a cold isostatic press with a pressure...

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Abstract

The invention relates to a high conductivity and high wear resistance copper-molybdenum alloy material. The material of the invention comprises a matrix alloy Cu, a friction component Al2O3, a lubrication component MoS2, a high temperature component Mo, and copper. A product (the material) is prepared by preparing a mixed powder material through mixing powders of Al2O3, MoS2, Mo and copper according to a proportion and filling into a stainless steel grinding pot of a high energy bowl mill, sending the mixed powder material to a press machine, prepressing into a blank, sending the blank to a cold isostatic press machine to press, and sending the statically pressed blank to a vacuum sintering furnace to sinter. In the invention, quality fraction scopes of above components are determined on the basis of massive experiments, and the experiments prove that ingredients in the component scopes allow reactions to be stably and smoothly carried out, and optimal performances of the material of the invention to be realized.

Description

technical field [0001] The invention relates to a copper-based composite material, in particular to a copper-molybdenum alloy material with high conductivity and high wear resistance and a preparation method thereof. Background technique [0002] With the progress and development of science and technology, high-speed, high-current electric friction materials have been widely used, such as in the field of rail transit, various switches of power transmission and transformation systems, various conductive contacts of communication systems, and industrial controllers. Various contactors, plug and unplug conductive parts, etc. This kind of friction-conductive friction material has the following characteristics: frictional contact and conductive contact coexist, service life, reliability and electrical conductivity are required to be equal, and the material is required to have the function of friction-conduction integration at the same time. [0003] In the current-carrying frict...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/05
Inventor 李继文谢敬佩王文焱王爱琴李洛利简学全马窦琴
Owner HENAN UNIV OF SCI & TECH
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