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Method for preparing hard alloy in vacuum extrusion mode

A cemented carbide and vacuum extrusion technology, which is applied in the field of preparing cemented carbide by vacuum extrusion, can solve the problems of insufficient tensile strength structure, poor microscopic surface, insufficient compactness, etc., and achieves compact microstructure and improved Wear resistance and good compactness

Inactive Publication Date: 2017-02-08
河源富马硬质合金股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, what cannot be achieved by traditional fine grain and molding technology, on the one hand, the compactness is not enough, resulting in insufficient hardness, on the other hand, the microscopic surface is not good after polishing, and the tensile strength structure is not enough

Method used

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  • Method for preparing hard alloy in vacuum extrusion mode
  • Method for preparing hard alloy in vacuum extrusion mode
  • Method for preparing hard alloy in vacuum extrusion mode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A method for preparing cemented carbide by vacuum extrusion, comprising the following steps:

[0022] S1. Pretreatment of raw materials, cleaning the raw materials, removing the adhering pollutants on the surface, and then using pickling to remove the oxides on the surface, and drying;

[0023] S2, powder preparation, put the dried raw materials into the melting furnace to melt, the liquefied metal droplets are injected into the spray device through the leak nozzle, and are blown out and atomized by the high-pressure gas, and the atomized metal liquid is directly sprayed into the high-pressure water flow, and the high-pressure The water flow is collected and filtered and entered into a high-speed rotating dryer for dehydration treatment, and various powders are obtained after drying and sieving;

[0024] S3, vacuum wrapping, the powder obtained in S2 is uniformly mixed, initially packed and vibrated into a special metal wrapping, and after vacuum degassing, the metal wr...

Embodiment 2

[0029] A method for preparing cemented carbide by vacuum extrusion, comprising the following steps:

[0030] S1. Pretreatment of raw materials, cleaning the raw materials, removing the adhering pollutants on the surface, and then using pickling to remove the oxides on the surface, and drying;

[0031] S2, powder preparation, put the dried raw materials into the melting furnace to melt, the liquefied metal droplets are injected into the spray device through the leak nozzle, and are blown out and atomized by the high-pressure gas, and the atomized metal liquid is directly sprayed into the high-pressure water flow, and the high-pressure The water flow is collected and filtered and entered into a high-speed rotating dryer for dehydration treatment, and various powders are obtained after drying and sieving;

[0032] S3, vacuum wrapping, the powder obtained in S2 is uniformly mixed, initially packed and vibrated into a special metal wrapping, and after vacuum degassing, the metal wr...

Embodiment 3

[0037] A method for preparing cemented carbide by vacuum extrusion, comprising the following steps:

[0038] S1. Pretreatment of raw materials, cleaning the raw materials, removing the adhering pollutants on the surface, and then using pickling to remove the oxides on the surface, and drying;

[0039] S2, powder preparation, put the dried raw materials into the melting furnace to melt, the liquefied metal droplets are injected into the spray device through the leak nozzle, and are blown out and atomized by the high-pressure gas, and the atomized metal liquid is directly sprayed into the high-pressure water flow, and the high-pressure The water flow is collected and filtered and entered into a high-speed rotating dryer for dehydration treatment, and various powders are obtained after drying and sieving;

[0040] S3, vacuum wrapping, the powder obtained in S2 is uniformly mixed, initially packed and vibrated into a special metal wrapping, and after vacuum degassing, the metal wr...

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Abstract

The invention discloses a method for preparing a hard alloy in a vacuum extrusion mode. The method comprises the following steps of: S1, raw material pre-treatment: removing impurities and rust; S2, powder preparation: dehydrating, drying and screening the raw materials to obtain various powder; S3, preparation of a vacuum sheath: after vacuum degassing, hermetically welding the metal sheath; S4, performing vacuum thermal extrusion, and performing preheating at 370 DEG C, 430 DEG C, 490 DEG C and 550 DEG C, respectively, before extrusion, preserving the temperature for 1h, after preserving the temperature, placing the metal sheath on a 300t oil press to be extruded, maintaining the temperature at 1000 DEG C and performing extrusion to obtain a blank; and S5, grinding: roughly grinding the blank. The hard alloy has the excellent characteristics of low density, high thermal conductivity, low expansion, high specific strength and the like, and is good in compactness, compact in micro-structure and high in tensile strength.

Description

technical field [0001] The invention relates to the field of hard alloy preparation technology, in particular to a method for preparing hard alloy by vacuum extrusion. Background technique [0002] With the rapid development of the machinery industry, the continuous improvement of the quality of high-speed machine tools and CNC machining centers requires higher and higher performance of cemented carbide, such as high hardness, high strength, high wear resistance, high toughness, high corrosion resistance, etc. Alloys with comprehensive properties are welcome. [0003] However, what cannot be achieved by traditional fine-graining and molding technology is that on the one hand, the compactness is not enough, resulting in insufficient hardness, and on the other hand, the microscopic surface after polishing is not good, and the tensile strength structure is not enough. SUMMARY OF THE INVENTION [0004] In view of the above problems, the present invention provides a method for...

Claims

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Application Information

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IPC IPC(8): B22F9/08B22F3/14B22F3/24C22C1/04
CPCB22F9/082B22F3/14B22F3/24B22F2003/145B22F2003/247B22F2998/10C22C1/04
Inventor 王忠平黄伟郭光富蔡家礼董纯洁金江
Owner 河源富马硬质合金股份有限公司
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