Method for manufacturing hard alloy by 3D printing

A cemented carbide, 3D printing technology, applied in the field of 3D printing, to achieve the effect of high dimensional accuracy, saving manufacturing costs, and expanding the scope of application

Active Publication Date: 2015-06-17
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing FDM is only organic p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] Example 1

[0029] Put WC powder and Co powder, paraffin wax and polyethylene into the ball mill barrel, where the content of organic binder in all materials is 55vol.%, the weight ratio of paraffin wax to polyethylene is 28:72, and alcohol is added for ball milling. The powder and the organic binder are wet-milled and mixed to obtain a slurry; the slurry is spray-dried and granulated to obtain a granular mixture; the mixture is extruded into a wire; the wire is loaded into the fuse deposition method A 3D printer is printed and formed to obtain a green body; the green body is dewaxed and sintered to obtain a final product.

Example Embodiment

[0030] Example 2

[0031] Put WC powder, Co powder, paraffin wax and polypropylene into the ball mill barrel, in which the content of organic binder in all materials is 40vol.%, the weight ratio of paraffin wax to polyethylene is 38:62, and alcohol is added for ball milling. The powder and the organic binder are wet-milled and mixed to obtain a slurry; the slurry is spray-dried and granulated to obtain a granular mixture; the mixture is extruded into a wire; the wire is loaded into the fuse deposition method A 3D printer is printed and formed to obtain a green body; the green body is dewaxed and sintered to obtain a final product.

Example Embodiment

[0032] Example 3

[0033] The WC powder and Co powder, as well as paraffin, polyethylene glycol, and polyethylene are charged into the ball mill barrel. The content of organic binder in all materials is 50vol.%, and the weight ratio of paraffin, polyethylene glycol and polyethylene is 30. : 25:45, and add alcohol for ball milling, wet-grind and mix the raw material powder with the organic binder to obtain a slurry; spray-dry and granulate the slurry to obtain a granular mixture; extrude the mixture into a wire The wire is loaded into a fuse deposition method 3D printer to print and form a green body; the green body is dewaxed and sintered to obtain a final product.

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PUM

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Abstract

The invention relates a method for manufacturing hard alloy by 3D printing. The method comprises the following steps: wet-grinding and mixing of hard alloy raw material powder and an organic binding agent, spray-drying granulation, extrusion into wires, 3D printing formation and dewaxing sintering. The method is used for manufacturing a hard alloy part in a complex shape by virtue of 3D printing formation, so that the application range of the hard alloy is greatly expanded. Compared with an existing 3D printing method, the raw material powder is easy to prepare, formed blank bodies are uniform, and waste of the powder cannot be caused. At the same time, the method is close to a conventional hard alloy production method, so that industrialized production is conveniently realized and the manufacturing cost is relatively low.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and in particular relates to a method for manufacturing cemented carbide by 3D printing. Background technique [0002] Cemented carbide is mainly composed of high-hardness refractory metal carbide (tungsten carbide, titanium carbide) powder, with cobalt (Co) or nickel (Ni), molybdenum (Mo) as binder, in a vacuum furnace or hydrogen Powder metallurgy products sintered in a reduction furnace. Cemented carbide has a series of excellent properties such as high hardness, wear resistance, good strength and toughness, heat resistance and corrosion resistance, especially its high hardness and wear resistance, which basically remain unchanged even at a temperature of 500°C , It still has a high hardness at 1000°C because of its high hardness and wear resistance. Carbide cutting tools, tools and dies, and wear-resistant parts are widely used in industries such as automobiles, ships, aircraft, motors,...

Claims

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Application Information

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IPC IPC(8): C22C1/05B22F3/115
Inventor 林涛王志邵慧萍韩宇超何新波
Owner UNIV OF SCI & TECH BEIJING
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