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Alloy drill bit for mining

A drill bit and cutter head technology, which is applied in the mining alloy drill bit and its preparation field, can solve the problems of poor bending strength, impact toughness, and insufficient wear resistance, and achieve improved mechanical strength, enhanced wear resistance, and good market application. foreground effect

Inactive Publication Date: 2015-07-01
宽城铧尖金矿有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Chinese invention patent CN201110433249 discloses a polycrystalline diamond compact drill matrix powder, the matrix prepared by it has greatly improved the bending strength and impact toughness, but the wear resistance is not enough
The matrix PDC drill bit prepared by the prior art generally cannot have all kinds of advantages at the same time, the bending strength and impact toughness are good, and the wear resistance is often not enough; while the matrix PDC bit with better wear resistance often has lower bending strength and impact toughness. Difference

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A mining drill bit is composed of a cutter head and a matrix, and the cutter head is prepared from the following raw materials in parts by weight;

[0027] 100 parts of nickel powder, 85 parts of barium titanate powder, 70 parts of tungsten powder, 69 parts of silicon nitride powder, 65 parts of chromium carbide powder, 50 parts of alumina powder, 45 parts of chromium powder, 30 parts of copper powder, 25 parts of tungsten carbide powder 2 parts, 20 parts of titanium carbide powder, 5 parts of sodium silicate, 2 parts of silica gel;

[0028] The particle diameters of the nickel powder, barium titanate powder, tungsten powder, silicon nitride powder, chromium carbide powder, aluminum oxide powder, chromium powder, copper powder, tungsten carbide powder and titanium carbide powder are all greater than 500 mesh; The modulus n is 2.6;

[0029] The preparation method of described cutter head comprises the steps:

[0030] 1) Weigh the above-mentioned raw materials according...

Embodiment 2

[0037] A cutter head carcass of a mining drill bit is prepared from the following raw materials in parts by weight;

[0038] 100 parts of nickel powder, 85 parts of barium titanate powder, 70 parts of tungsten powder, 69 parts of silicon nitride powder, 65 parts of chromium carbide powder, 50 parts of alumina powder, 45 parts of chromium powder, 30 parts of copper powder, 25 parts of tungsten carbide powder 2 parts, 20 parts of titanium carbide powder, 5 parts of sodium silicate, 2 parts of silica gel;

[0039] The particle diameters of the nickel powder, barium titanate powder, tungsten powder, silicon nitride powder, chromium carbide powder, aluminum oxide powder, chromium powder, copper powder, tungsten carbide powder and titanium carbide powder are all greater than 500 mesh; The modulus n of the silica gel is 2.6; the pore volume of the silica gel is 0.6-0.8ml / g, the average pore diameter is 4.5-7.0nm, and the specific surface is 450-650m 2 / g.

[0040] The preparation m...

Embodiment 3

[0048] The performance test of the bit matrix material of the present invention: the control group adopts the polycrystalline diamond compact bit bit matrix prepared according to the method of Example 2 of CN201110433249; the experimental group is the matrix prepared in Example 2 of the present invention.

[0049] By testing the bending strength of the carcass (using a hydraulic universal testing machine), the impact resistance and the wear ratio; among them, the wear ratio test uses a grinding wheel to rub the carcass, and a stopwatch counts for 180 seconds to detect the quality of the grinding wheel and carcass. wear ratio. The carcass adopts a size of 5mm×5mm×5mm; the grinding wheel is a silicon carbide grinding wheel. See Table 1 for specific results:

[0050] Table 1

[0051] Types of Bending strength / MPa Impact energy (J / cm 2 ) Grinding wheel weight loss / g Carcass weight loss / g wear ratio test group 1316 15.6 4.12 0...

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Abstract

The invention belongs to the technical field of machining, and discloses a mining drill bit comprising a tool bit and a base body. The tool bit comprises, by weight, 100-120 parts of nickel powder, 85-90 parts of barium titanate powder, 70-75 parts of tungsten powder, 69-72 parts of silicon nitride powder, 65-68 parts of chromium carbide powder, 50-55 parts of alumina powder, 45-48 parts of chromium powder, 30-32 parts of copper powder, 25-28 parts of tungsten carbide powder, 20-22 parts of titanium carbide powder, 5-8 parts of water glass and 2-3 parts of silica gel. The invention further discloses a drill bit matrix. The drill bit has good bending strength, impact toughness and abrasive ratio.

Description

technical field [0001] The invention belongs to the field of mechanical material processing, and relates to an alloy drill bit for mining and a preparation method thereof. Background technique [0002] Mining is the technology and science of mining mineral resources from the earth's crust or surface, generally referring to the mining of metal or non-metal deposits. Mining industry is an important raw material extraction industry, such as metal ore is the main raw material of metallurgical industry, non-metallic ore is chemical raw material and building materials, coal and oil are important energy sources. Most ores need to be enriched by beneficiation before they can be used as industrial raw materials. [0003] Currently, in the mining industry, most mines use PDC bits, and this trend will continue as compact disc technology and drilling techniques evolve. PDC bit (Polycrystalline Diamond Compact bit) is the abbreviation of polycrystalline diamond compact bit, which is a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/06B22F1/00
Inventor 蒋奉亮匡立军杨善明乔秀杰田学友郑明林纪献平马启峰金培庸
Owner 宽城铧尖金矿有限公司
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