Preparation method for sintered copper powder material of heat pipe

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...

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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 surface, so that the prepared copper powder can be used to manufacture capillary structures of heat pipes , to solve the defects that the existing copper powder is not easy to adhere to the inner wall of the heat pipe and is easy to fall off

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