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Tungsten-copper alloy feedstock and preparation method thereof

A tungsten-copper alloy feeding technology, which is applied in the field of tungsten-copper alloy feeding and its preparation, can solve the problems of difficult degreasing, poor fluidity, and low loading rate, and achieve good fluidity, compatibility, and shape retention Good results

Active Publication Date: 2019-03-29
GUANGDONG INST OF NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the feeding materials of tungsten copper alloy powder injection molding have problems such as poor fluidity, low loading rate, many defects and difficult degreasing.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0010] The invention provides a preparation method of tungsten-copper alloy feeding material, comprising:

[0011] Preparation of tungsten copper alloy powder. Mix tungsten powder with copper powder to get tungsten copper alloy powder. The mass ratio of tungsten powder and copper powder has a great influence on the performance of tungsten-copper alloy feeding material. According to the research of the inventor of the present application, when the mass ratio of tungsten powder and copper powder is 50~90:10~50, tungsten copper The performance of the alloy feed is better. Optionally, the mass ratio of tungsten powder to copper powder can be 4:2, 6:5, 8:1, 7:3. In some embodiments of the present invention, the mass ratio of tungsten powder to copper powder is 75-90:15-25. It should be noted that the tungsten-copper alloy powder can also be obtained directly, and it does not have to be mixed by itself.

[0012] In some embodiments of the present invention, the particle size of ...

Embodiment 1

[0024] This embodiment provides a kind of tungsten-copper alloy feeding material and its preparation method, comprising:

[0025] The mass ratio of tungsten powder and copper powder is 75:25 and added into the mixer, and the powder is mixed at a speed of 40 rpm for 24 hours to obtain tungsten-copper alloy powder. Among them, the diameter of the tungsten powder is 1.5 μm, and the diameter of the copper powder is 38 μm.

[0026] The plastic-based binder is prepared by mass percent of 79% of polyoxymethylene, 9% of high-density polyethylene, 3% of vinyl acetate copolymer, 2% of stearic acid, 5% of solid paraffin, and 2% of glycerin. Pour 2000g of tungsten-copper alloy powder into the internal mixer at a speed of 30rpm; when the temperature of the internal mixer reaches 180°C, put 325g of plastic-based binder into the internal mixer. When the temperature of the internal mixer reaches 180°C again, stop heating after internal mixing for 90 minutes, take it out and cool it, and crus...

Embodiment 2

[0029] This embodiment provides a kind of tungsten-copper alloy feeding material and its preparation method, comprising:

[0030] The mass ratio of tungsten powder and copper powder is 80:20 and added into the mixer, and the powder is mixed for 30 hours at a rotating speed of 35 rpm to obtain tungsten-copper alloy powder. Among them, the diameter of the tungsten powder is 2.5 μm, and the diameter of the copper powder is 45 μm.

[0031] The plastic-based binder is prepared by mass percent of 75% of polyoxymethylene, 5% of high-density polyethylene, 3% of vinyl acetate copolymer, 2% of stearic acid, 14% of solid paraffin, and 1% of glycerin. Pour 2000g of tungsten-copper alloy powder into the internal mixer at a speed of 35rpm; when the temperature of the internal mixer reaches 185°C, put 300g of plastic-based binder into the internal mixer. When the temperature of the internal mixer reaches 185°C again, stop heating after internal mixing for 80 minutes, take it out and cool it...

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Abstract

The invention relates to a tungsten-copper alloy feedstock and a preparation method thereof, and belongs to the technical field of polymer binder materials and powder metallurgy. The preparation method of the tungsten-copper alloy feedstock comprises the following steps that banburying is carried out on tungsten-copper alloy powder and a plastic-based binder at 135-210 DEG C; and the mixed material is crushed after the banburying. The tungsten-copper alloy powder and the plastic-based binder are taken as raw materials, and the portion of the tungsten powder and the copper powder in the tungsten-copper alloy powder is controlled, meanwhile, the plastic-based binder with good performance is adopted, the tungsten-copper alloy powder and the plastic-based binder are subjected to the banburyingunder an optimal temperature condition, so that the tungsten-copper alloy feedstock with good compatibility, good liquidity and good degreasing blank shape retention property is obtained. The preparation method provided is simple in steps, high in controllability, and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of polymer binder materials and powder metallurgy, and in particular to a tungsten-copper alloy feed material and a preparation method thereof. Background technique [0002] Tungsten copper alloy is composed of tungsten with high melting point, high hardness, low thermal expansion and copper with high electrical and thermal conductivity. Tungsten and copper are neither solid solutions nor intermetallic compounds, so they are typical pseudo-alloys. The advantage of the pseudo-alloy is that the tungsten-copper material can exhibit the intrinsic physical properties of these two metals, so that it has the high strength, high hardness and low thermal expansion properties of tungsten, as well as the high plasticity and good thermal conductivity of copper. performance. Tungsten-copper alloys are widely used in high-voltage electrical appliances, electronics, electrical processing, weapons and other fields. Since...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F3/22
CPCB22F3/225B22F1/103B22F1/108
Inventor 崔利群韩胜利胡可刘辛
Owner GUANGDONG INST OF NEW MATERIALS
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