The invention discloses a tungsten-molybdenum-aluminum alloy powder, which was expressed as W [1-x-y] Al [x] Mo ↓ [y], where: x = 0.01-0.86, y = 0.01 -0.98. Steps are as follows:

1) Tungsten powder, molybdenum powder, aluminum powder and three metal powder or tungsten and molybdenum alloy powder and aluminum powder as raw material, adding mill pot, ball feed ratio of 25:1-50:1, sealed under argon, synthesis time 30-160 hours to obtain aluminum, molybdenum, tungsten alloy powder; zhibei

2) Tungsten powder, molybdenum powder and an aluminum alloy as raw material, a ball mill jar, the ball feed ratio of 25:1-50:1, sealed under argon, the synthesis time is 30-160 hours, the obtained product was placed in a vacuum carbon tube furnace, 1200-1400 ℃ for 5 to 10 hours to obtain aluminum, molybdenum, tungsten alloy powder.

The present invention can be divided into several aluminum ball mill jar was added.




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The present invention describes a tungsten chromium - copper composite material. Characterized in that:

Percentage by weight of the composition comprises the following components: from 32% to 50% tungsten, 11% to 23% chromium, 27% ​​-57% of copper, the sum of the components is 100% by weight.

Preparation steps are as follows:

The tungsten powder and chromium powder mixing, granulating, pressed into billets, and then by sintering copper liquid infiltration, after homogenization treatment and aging treatment system. The compositions especially as 110kV high-voltage vacuum circuit breaker above the contact material, its dense, with good conductivity, moderate hardness, low gas content, the lower closure value, excellent performance and arc burning welding resistance.




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The present invention provides a process for preparing tungsten silver or tungsten copper alloy composites. Steps are as follows:

1) Selecting 10 ~ 500um diameter tungsten material, pickling, cleaning;

2) According to the conditions required size, cut tungsten material;

3) The copper or silver wound is tightly around the tungsten, copper or silver in the diameter determined by the ratio of tungsten copper tungsten silver or composite materials;

4) Tied a copper or silver wound tungsten rod  into its peripheral diameter of 0.5 ~ 5cm; e. The rod-like material after the binder is placed in a vertical vacuum sintering furnace melt infiltration; copper or silver bullion ingot placed on top of the rod after the tying material, the infiltration temperature is above the melting point of copper or silver, the temperature holding time of 0.25 to 2 hours;

5) With the furnace cooling to room temperature, it is made of tungsten or tungsten silver-copper alloy composite cathode rod after removed;

6) Machining the above-mentioned composite cathode bar, that is the composite material obtained in the desired element.

Obtained by this method tungsten or tungsten silver-copper alloy composite material with high density and electrical conductivity, and oxygen content, nitrogen content and inclusions are very low, especially for the cathode as in the field of high-voltage electrical appliances, etc. materials.




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The present invention describes a copper - tungsten - carbon - titanium - rare earth alloy material, the copper - tungsten - carbon - titanium - rare earth alloy materials by Cu, WC, C, Ti, rare earth elements, and each substance mass percentage content follows: WC5-20%, C1.0-4%, Ti0.8-2.5%, 0.1-1.2%, rare earths, and the balance Cu. Characterized in that:

1) The alloy material is a metal - carbide series based on the development of a new successful electrical contact materials, which reduces the content of WC, increases the weight percentage of Cu with good conductive properties, to improve the material's electrical conductivity, reduced the effect of resistivity, effective control of the material technical problems in the use of temperature rise, the heat burning the contacts;

2) While adding a small amount of an appropriate amount of C and Ti, rare earth elements, to further improve the welding resistance, electrical wear resistance and overall performance of electric arc, the electrical life of other materials;

3) In particular, the use of advanced mechanical alloying production process, replacing the traditional mix powder metallurgy method to improve the degree of fine material internal organizational structure, so that the scope of application of the material switches from a particular large current appliances, circuit breakers use extended to most moderate current series of switches, circuit breakers can be used.

4) Especially in the silver section, there is a significant effect on saving silver, low cost advantages as well, so it  has a  market prospect.




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