Preparation method for sintered copper powder material of heat pipe

A manufacturing method and sintering technology, which is applied in the field of manufacturing sintered copper powder materials, can solve the problems that copper powder is not easy to adhere to the inner wall of the heat pipe, and is easy to fall off, so as to achieve the effect of reducing energy consumption and production cost

Inactive Publication Date: 2011-03-30
JIANGSU DAFANG METAL POWDER
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  • Claims
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Problems solved by technology

[0004] Another object of the present invention is to provide a method for manufacturing copper powder materials, so as to obtain 50 μm to 500 μm single-particle irregular-shaped copper powder, and at the same time produce slight cracks on the

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  • Preparation method for sintered copper powder material of heat pipe
  • Preparation method for sintered copper powder material of heat pipe
  • Preparation method for sintered copper powder material of heat pipe

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Embodiment Construction

[0024] Embodiments of the present invention are described in detail below. The invention is not limited to the specific examples. In this specification, all parts are parts by weight, all percentages are percentages by weight, and all temperatures are in degrees Celsius. The specific method is as follows:

[0025] Select 500kg of bright copper, copper rice or electrolytic copper with a purity of 99.9%, add it to the intermediate frequency induction furnace for melting in batches, start the induction furnace melting of the intermediate frequency furnace, and start blowing oxygen with a graphite tube when liquid copper liquid appears at 1083°C, and use the copper liquid to continuously measure oxygen The sensor directly fixes oxygen to maintain an oxygen content of 0.1-1% on the surface of the copper melt. After the copper liquid is dissolved in oxygen, the surface tension decreases, which can reduce the standard deviation of the particle size distribution, making it easier to...

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Abstract

The invention relates to a preparation method of metal powder, in particular to a preparation method for a sintered copper powder material of a heat pipe. The method comprises the following steps in sequence: smelting, water atomization, dehydrating, drying, reducing, smashing and antioxidant treatment, wherein water jet torrent set in the water atomization process comprises a tapered water curtain formed by the water jet torrent and two V-shaped water curtains formed by intersection of two pairs of planar water jet torrent; the tip of the tapered water curtain faces downwards, and the axial lead of the tapered water curtain is vertical; straight lines formed by the crossing angles of the two V-shaped water curtains are vertical to each other, and the crossing angles of the two V-shaped water curtains are positioned below the tip of the tapered water curtain; and in the water atomization process, copper liquid flow falls along the axial lead of the tapered water curtain and is sequentially contacted with the tapered water curtain and the V-shaped water curtains. The invention has the advantages that the energy consumption and the production cost are lowered, the product quality is obviously improved, and the problem of producing copper powder with a low Poisson's ratio by the water atomization method is solved.

Description

technical field [0001] The invention relates to a method for preparing metal powder, in particular to a method for manufacturing a sintered copper powder material for a heat pipe with a sintered inner wall. Background technique [0002] As a heat dissipation element, the heat pipe is mainly used in the cooling of electronic device chips, notebook computer CPU cooling, high-power transistors (IGBTs), thyristor components, industrial boilers, etc. The circulation of the working medium in the heat pipe is the result of the balance of capillary force, gravity, and fluid flow pressure loss. The capillary structure of the inner wall of the heat pipe can provide the capillary force for the flow of liquid working fluid. Heat pipes can be divided into three types according to the capillary structure: groove type, mesh type and powder sintered type. The sintered powder type is formed by sintering metal powder close to the tube wall to form a porous structure, which has good capillary...

Claims

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Application Information

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IPC IPC(8): B22F9/08
Inventor 方义强姚辉谢云鹏
Owner JIANGSU DAFANG METAL POWDER
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