Preparation forming method of nano tungsten-copper alloy cooling fin

A technology of copper alloy and heat sink, which is applied in the field of preparation and forming of nano-tungsten copper alloy heat sink, can solve the problems of restricting the development of tungsten-copper alloy materials and difficult production of tungsten-copper alloy

Pending Publication Date: 2021-07-06
深圳市注成科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult to produce tungsten-copper alloys with complex shapes by the traditional molding process, and it is difficult for traditional tungsten-copper all

Method used

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  • Preparation forming method of nano tungsten-copper alloy cooling fin
  • Preparation forming method of nano tungsten-copper alloy cooling fin

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Embodiment 1

[0025] The embodiment of the invention discloses a method for preparing and forming a nano-tungsten-copper alloy heat sink, such as figure 1 shown, including:

[0026] Step S101, high-energy ball milling: Add the mixed powder composed of nano-tungsten powder, nano-copper powder and graphene powder into the tank of the high-energy ball mill, and then add a preset amount of absolute ethanol and tungsten balls for wet milling; after the mixed powder is ball-milled evenly Precipitation, drying, and sieving and packaging in a sealed box; in this embodiment, the weight ratio of absolute ethanol to metal mixed powder is (0.1-0.5):1, and the weight ratio of the grinding tungsten balls of the high-energy ball mill to the mixed powder is The ratio is (1-5): 1; the particle size of nano-tungsten powder is 10-100nm, the particle size of nano-copper powder is 100-500nm, the diameter of the grinding ball is 3-8mm, the speed of the high-energy ball mill is 100-500r / min, the milling time For...

Embodiment 2

[0035] The embodiment of the invention discloses a method for preparing and forming a nano-tungsten-copper alloy heat sink, such as figure 1 shown, including:

[0036] Step S101, high-energy ball milling: Add the mixed powder composed of nano-tungsten powder, nano-copper powder and graphene powder into the tank of the high-energy ball mill, and then add a preset amount of absolute ethanol and tungsten balls for wet milling; after the mixed powder is ball-milled evenly Precipitate, dry, and sieve and pack in the airtight box; In the present embodiment, wherein graphene powder accounts for the mass ratio of metal mixed powder is 1%, and the weight ratio of dehydrated alcohol and metal mixed powder is (0.1~0.5 ): 1. The weight ratio of grinding tungsten balls and mixed powder of high energy ball mill is (1~5):1. The particle size of the nano-tungsten powder is 10-100nm, the particle size of the nano-copper powder is 100-500nm, the diameter of the ball is 3-8mm, the speed of the ...

Embodiment 3

[0045] The embodiment of the invention discloses a method for preparing and forming a nano-tungsten-copper alloy heat sink, such as figure 1 shown, including:

[0046] Step S101, high-energy ball milling: Add the mixed powder composed of nano-tungsten powder, nano-copper powder and graphene powder into the tank of the high-energy ball mill, and then add a preset amount of absolute ethanol and tungsten balls for wet milling; after the mixed powder is ball-milled evenly Precipitate, dry, and sieve and package in a sealed box; in this embodiment, the mass ratio of graphene to metal mixed powder is 3%. The weight ratio of the absolute ethanol to the metal mixed powder is (0.1-0.5):1, and the weight ratio of the grinding balls of the high-energy ball mill to the metal powder is (1-5):1. The particle size of the nano-tungsten powder is 10-100nm, the particle size of the nano-copper powder is 100-500nm, the diameter of the ball is 3-8mm, the speed of the high-energy ball mill is 100...

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Abstract

The invention relates to the technical field of powder metallurgy injection molding, and discloses a preparation forming method of a nano tungsten-copper alloy cooling fin. The preparation forming method comprises the following steps: adding mixed powder consisting of nano tungsten powder, nano copper powder and graphene powder into a tank body of a high-energy ball mill, and then adding a preset amount of absolute ethyl alcohol and tungsten balls for wet milling; adding the mixed powder which is uniformly mixed and a special wax-based binder into a vacuum internal mixer, vacuumizing and refining to obtain feedstock; extruding the feedstock subjected to vacuum mixing according to a preset number of times by using a double-screw machine; adding the granulated feedstock into an injection machine, and injecting into a nano tungsten-copper alloy cooling fin injection-molded blank under a specific process; sequentially performing solvent degreasing and thermal degreasing on the nano tungsten-copper alloy cooling fin injection molding blank; and feeding hydrogen into the degreased nano tungsten-copper alloy cooling fin injection molding blank for sintering to obtain nano tungsten-copper alloy cooling fin. According to the method, the nano tungsten-copper alloy cooling fin which is uniform in structure, high in density and low in carbon residue amount can be prepared.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy injection molding, in particular to a method for preparing and forming a nano-tungsten-copper alloy heat sink. Background technique [0002] Tungsten copper alloy not only has the high melting point and low expansion characteristics of tungsten, but also has the high electrical conductivity and high thermal conductivity of copper, and its thermal expansion coefficient, thermal conductivity and electrical conductivity can be adjusted according to the percentage content of tungsten and copper components. Therefore, it plays an important role in mobile communication equipment, medical equipment, precision mold processing, microelectronics and other fields. [0003] The traditional method of preparing tungsten-copper alloy is to mold tungsten-copper powder, and finally produce corresponding parts by machining. However, with the development of science and technology, the application fields a...

Claims

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Application Information

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IPC IPC(8): B22F5/00B22F1/00B22F3/10B22F3/22
CPCB22F5/006B22F3/225B22F3/1021B22F3/1007B22F2999/00B22F2998/10B22F1/108B22F1/10B22F2201/013
Inventor 赵利亚姚艳斌周永贵张越
Owner 深圳市注成科技股份有限公司
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