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Copper-molybdenum alloy for electric vacuum and preparation method thereof

A technology of copper-molybdenum alloy and electric vacuum, which is applied in the field of copper-molybdenum alloy for electric vacuum and its preparation, can solve the problems of decreased electrical and thermal conductivity, loss of strengthening effect, poor air tightness, etc., and achieves improved power and life, and high production efficiency , the effect of uniform particle distribution

Active Publication Date: 2018-02-23
GRIMAT ENG INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of high-strength and high-conductivity copper alloy represented by alumina dispersion-strengthened oxygen-free copper is a traditional powder metallurgy process. The material has a large gas content and poor air tightness, which restricts its application in the electric vacuum industry.
Chromium-zirconium-copper alloy prepared by traditional smelting method will lose its strengthening effect during the vacuum brazing process, its strength will decrease and its electrical and thermal conductivity will drop sharply

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the preparation of the copper-molybdenum alloy that molybdenum content is 3wt%, the remainder is copper

[0024] (1) Raw material preparation: The raw materials used are: the purity is not less than 99.95%, and the particles are 300-mesh electrolytic copper powder; the molybdenum powder coated with copper on the surface, the average particle size of the molybdenum powder is D 50 is 3μm, and the copper content is 3wt%;

[0025] (2) Mixing: put the raw material powder with a mass ratio of electrolytic copper powder and molybdenum powder of 96.9:3.1 in a double-cone mixer and mix for 48 hours to obtain uniformly mixed copper-molybdenum powder;

[0026] (3) Place the uniformly mixed copper-molybdenum powder in a steel mold of a predetermined shape, then press and form it on a molding machine to obtain a copper-molybdenum green body, and the pressure of the molding machine is 160MPa;

[0027] (4) Hydrogen reduction activation: Under the condition of hydrogen, ...

Embodiment 2

[0030] Embodiment 2: the molybdenum content is 5wt%, the preparation of the copper-molybdenum alloy of copper all the other

[0031] (1) Raw material preparation: The raw materials used are: the purity is not less than 99.95%, the particle is 300 mesh water atomized copper powder; the purity is 99.95%, and the average particle size is 3.0 μm molybdenum powder;

[0032] (2) Mixing: put the raw material powder with a mass ratio of water atomized copper powder and molybdenum powder of 95:5 in a double-cone mixer and mix for 36 hours to obtain uniformly mixed copper-molybdenum powder;

[0033] (3) Place the uniformly mixed copper-molybdenum powder in a steel mold of a predetermined shape, then press and form it on a molding machine to obtain a copper-molybdenum green body, and the pressure of the molding machine is 120MPa;

[0034] (4) Hydrogen reduction activation: under the condition of hydrogen, the copper-molybdenum green body was reduced and activated in a molybdenum wire fur...

Embodiment 3

[0037] Embodiment 3: the preparation of the copper-molybdenum alloy that molybdenum content is 10wt%, the rest is copper

[0038] (1) Raw material preparation: the raw materials used are: the purity is not less than 99.95%, the particle is 300 mesh water atomized copper powder; the purity is 99.95%, and the average particle size is 5.0 μm molybdenum powder;

[0039] (2) Mixing: put the raw material powder with a mass ratio of water atomized copper powder and molybdenum powder of 90:10 in a double-cone mixer and mix for 24 hours to obtain uniformly mixed copper-molybdenum powder;

[0040] (3) Place the uniformly mixed copper-molybdenum powder in a soft rubber sleeve and bind and seal it, then press and form it on a cold isostatic press to obtain a copper-molybdenum green body, and the pressure of the cold isostatic press is 120MPa;

[0041] (4) Hydrogen reduction activation: Under the condition of hydrogen, the copper-molybdenum green body was reduced and activated in a molybde...

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Abstract

The invention discloses a copper and molybdenum alloy for electric vacuum and a preparation method of the copper and molybdenum alloy for electric vacuum and belongs to the technical field of refractory metal powder metallurgy powder manufacturing. The copper and molybdenum alloy comprises 3-10wt% of molybdenum and the balance copper. Molybdenum powder or molybdenum powder with the surface coated with the copper and copper powder serve as raw materials, and the copper and molybdenum alloy is acquired through material mixing, compression molding, hydrogen reducing activation and densification treatment. Molybdenum powder particles in the alloy are distributed uniformly, the density is not lower than 99%, and a material guarantee is provided for a low gas emitting amount, high gas tightness, high heat conductivity and medium strength copper alloy. The preparation method can be achieved on an existing powder metallurgy production line, scale production is easy, and the production efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of refractory metal powder metallurgy powder making, and in particular relates to a copper-molybdenum alloy for electric vacuum and a preparation method thereof. Background technique [0002] Molybdenum-copper alloy or copper-molybdenum alloy is a kind of pseudo alloy composed of two phases composed of molybdenum and copper, which are neither solid solution nor compound. Molybdenum-copper alloy has both the high melting point and low expansion properties of molybdenum and the high electrical and thermal conductivity of copper. The mutual insolubility between the two components makes them present a specific combination of the performance of the two elements after compounding, so the components can be flexibly and accurately designed according to the requirements of use. [0003] Since metal molybdenum and metal copper are immiscible at room temperature, the molybdenum particles in the copper matrix have litt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C9/00C22C1/04
CPCB22F2998/10C22C1/0425C22C9/00B22F1/0003B22F3/02B22F3/1039B22F3/101B22F2003/145B22F3/04B22F3/15
Inventor 李增德李卿李洋
Owner GRIMAT ENG INST CO LTD