Hard metal used for drilling bit

A hard metal and drill technology, applied in the field of hard metal, can solve problems such as restriction, uneven carbonization reaction, and segregation of tissue defects, and achieve the effects of uniform structure, improved structure uniformity, and uniform carbon content

Active Publication Date: 2015-06-17
JIANGMEN JIANTAO HI TECH
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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

[0019] A hard metal used for drill bits is prepared from the following components by weight:

[0020] Fe: 150 parts; Graphene: 0.05 parts, carbon powder: 0.1 parts, SiO 2 : 0.01 parts, Ti : 5 parts, TiO 2 : 0.2 parts; P: 0.01 parts, Cr: 2 parts, Ni: 5 parts, Mo: 0.5 parts.

[0021] A method for preparing a hard metal for a drill bit, comprising the following steps:

[0022] 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

[0024] A hard metal for a drill bit, characterized in that it is prepared from the following components by weight:

[0025] Fe: 240 parts; graphene: 0.1 parts, carbon powder: 0.5 parts, SiO 2 : 0.03 parts, Ti : 10 parts, TiO 2 : 0.8 parts; P: 0.05 parts, Cr: 4 parts, Ni: 10 parts, Mo: 1 part.

[0026] A method for preparing a hard metal for a drill bit, comprising the following steps:

[0027] Graphene is uniformly dispersed in an organic solvent to form a dispersion, 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

[0029] A hard metal used for drill bits is prepared from the following components by weight:

[0030] Fe: 200 parts; graphene: 0.08 parts, carbon powder: 0.3 parts, SiO 2 : 0.02 parts, Ti : 6 parts, TiO 2 : 0.5 parts; P: 0.03 parts, Cr: 3 parts, Ni: 7 parts, Mo: 0.7 parts.

[0031] A method for preparing a hard metal for a drill bit, comprising the following steps:

[0032] Graphene is uniformly dispersed in an organic solvent to form a dispersion, 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.

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Abstract

The invention discloses hard metal used for a drilling bit. The hard metal is prepared by following components, by weight, 150-240 parts of Fe; 0.05-0.1 part of graphite alkene, 0.1-0.5 part of carbon dust; 0.01-0.03 part of SiO2, 5-10 parts of Ti, 0.2-0.8 part of TiO2; and 0.01-0.05 part of P, 2-4 parts of Cr, 5-10 parts of Ni, 0.5-1 part of Mo. Hardness of the hard metal used for the drilling bit is much larger than that of common alloy or metal, and a preparation method of the hard metal is quite simple and particularly suitable for industrial production.

Description

technical field [0001] The present invention relates to an alloy material, in particular to a hard metal used for a drill bit. Background technique [0002] Drills are generally made of cemented carbide, because the epoxy glass cloth clad copper foil plate wears the tool very quickly. The so-called cemented carbide is formed by pressing and sintering tungsten carbide powder as the matrix and cobalt powder as the binder. It usually contains 94% tungsten carbide and 6% cobalt. Due to its high hardness, it is very wear-resistant and has a certain strength, which is suitable for high-speed cutting. However, the toughness is poor and very brittle. In order to improve the performance of the cemented carbide, some use a chemical vapor deposition layer of 5-7 microns of extra-hard titanium carbide (TIC) or titanium nitride (TIN) on the carbide substrate to make it Has higher hardness. Some use ion implantation technology to inject titanium, nitrogen, and carbon into the matrix t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00C22C38/50
Inventor 蒋伟锋
Owner JIANGMEN JIANTAO HI TECH
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