A kind of modified cemented carbide and its preparation

A cemented carbide and modification technology, which is applied in the field of alloy materials, can solve problems such as uneven carbonization reaction, restriction, and structural defect segregation, and achieve the effect of improving tissue uniformity, uniform structure, and uniform carbon content

Inactive Publication Date: 2015-12-09
河池市技术市场管理办公室
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current invention patent discloses a hard alloy, but the hard alloy is prepared by mixing traditional metal powder and carbon powder. Due to the large particle size of the raw material, it is difficult for the carbon powder to effectively form a wrapping structure outside the metal powder, and the uneven carbonization reaction leads to structural defects. Serious segregation greatly restricts the implementation of this method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A modified cemented carbide, prepared from the following components by weight:

[0021] Graphene: 0.1 part, carbon powder: 0.2 part, Si: 0.1 part, Ti: 0.1 part, Cr: 1 part, Ni: 3 parts, Mo: 0.5 part, Fe: 100 parts.

[0022] The preparation method of modified cemented carbide comprises the following steps:

[0023] Graphene is uniformly dispersed in an organic solvent to form a dispersion liquid, and then mixed with other raw material powders to form a cemented carbide raw material, the mixture is melted, cooled into an ingot, ground into a fine powder, dried, granulated, and melted again , to get the desired product.

Embodiment 2

[0025] A modified cemented carbide, prepared from the following components by weight:

[0026] Graphene: 0.8 parts, carbon powder: 0.5 parts, Si: 0.3 parts, Ti: 0.8 parts, P: 0.01 parts, Cr: 2 parts, Ni: 8 parts, Mo: 2 parts, Fe: 200 parts.

[0027] The preparation method of modified cemented carbide comprises the following steps:

[0028] Graphene is uniformly dispersed in an organic solvent to form a dispersion liquid, and then mixed with other raw material powders to form a cemented carbide raw material, the mixture is melted, cooled into an ingot, ground into a fine powder, dried, granulated, and melted again , to get the desired product.

Embodiment 3

[0030] A modified cemented carbide, characterized in that it is prepared from the following components by weight:

[0031] Graphene: 0.5 parts, carbon powder: 0.4 parts, Si: 0.2 parts, Ti: 0.5 parts, P: 0.002 parts, Cr: 2 parts, Ni: 6 parts, Mo: 1 part, Fe: 100 parts.

[0032] The preparation method of modified cemented carbide comprises the following steps:

[0033] Graphene is uniformly dispersed in an organic solvent to form a dispersion liquid, and then mixed with other raw material powders to form a cemented carbide raw material, the mixture is melted, cooled into an ingot, ground into a fine powder, dried, granulated, and melted again , to get the desired product.

[0034] Highly active graphene and metal powder are used as raw materials for the preparation of cemented carbide, and carbonization and sintering are realized in one step during the sintering process, which has the characteristics of high efficiency and quickness. Oxygen groups, easy to disperse, and high a...

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PUM

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Abstract

The invention discloses a modified hard alloy which is prepared from the following components in parts by weight: 0.1-0.8 part of graphene, 0.2-0.5 part of carbon powder, 0.1-0.3 part of Si, 0.1-0.8 part of Ti, 0-0.01 part of P, 1-2 parts of Cr, 3-8 parts of Ni, 0.5-2 parts of Mo and 100-200 parts of Fe. The modified hard alloy disclosed by the invention has good hardness which is far higher than that of a common alloy or metal; and the preparation method of the hard alloy is very simple and is especially suitable for industrial production.

Description

technical field [0001] The invention relates to an alloy material, in particular to a modified hard alloy and its preparation. Background technique [0002] Cemented carbide is an alloy material made of hard compounds of refractory metals and bonding metals through powder metallurgy. 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, and is widely used as industrial cutting tools, mining drills, wear-resistant parts, precision parts, etc. Traditional cemented carbide industry [0003] The preparation method is mainly based on the powder metallurgy method, the carbide and the metal binder are mixed and pressed into shape, and sintered to form a [0004] close alloy. Therefore, a large number of carbides are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/50C22C33/02
Inventor 高熠辉
Owner 河池市技术市场管理办公室
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