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Down-the-hole drill bit coated with diamond layer by laser 3D printing method and preparation method of down-the-hole drill bit

A technology of diamond layer and printing method, which is applied to drill bits, drilling equipment, earth-moving drilling, etc., can solve the problems of reducing the drilling efficiency of the drill bit, shortening the service life of the drill bit, wear resistance and other problems, so as to improve the drilling efficiency, High utilization rate of material forming and sintering, and the effect of improving impact resistance

Active Publication Date: 2021-03-09
湖南省地球物理地球化学调查所 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the wear resistance and other performance of the down-the-hole drill bit storage body are seriously insufficient. During the working process, the storage body wears out quickly, resulting in the loss of the button teeth, shortening the service life of the drill bit and reducing the drilling efficiency of the drill bit.

Method used

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  • Down-the-hole drill bit coated with diamond layer by laser 3D printing method and preparation method of down-the-hole drill bit
  • Down-the-hole drill bit coated with diamond layer by laser 3D printing method and preparation method of down-the-hole drill bit
  • Down-the-hole drill bit coated with diamond layer by laser 3D printing method and preparation method of down-the-hole drill bit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 , 2 As shown, the cemented carbide down-the-hole drill bit coated with diamond layer by laser 3D printing method includes three parts: the drill body, the working surface of the warehouse body impregnated with diamond layer, and the cemented carbide button. The impregnated diamond layer coated on the working face of the drill body has a thickness of 5mm, the volume fraction of CoCrWMo alloy is 75%, and the volume fraction of diamond is 25%. The raw material CoCrWMo pre-alloyed powder is used, the composition mass ratio is Co82%, Cr6%, W7%, Mo5%, and the powder particle size is 0.038-0.044mm (300 / 325 mesh). The diamond particle size used is 0.12-0.15 mm (100 / 120 mesh).

[0030] Its production process is as follows:

[0031] Step 1: Prepare CoCrWMo pre-alloyed powder and diamond, wherein the composition mass ratio of CoCrWMo pre-alloyed powder is Co82%, Cr6%, W7%, Mo5%, and the particle size is 0.038~0.044mm (300 / 325 mesh); the diamond particle size is...

Embodiment 2

[0042] Such as figure 1 ,2 As shown, the cemented carbide down-the-hole drill bit coated with diamond layer by laser 3D printing method includes three parts: the drill body, the working surface of the warehouse body impregnated with diamond layer, and the cemented carbide button. The impregnated diamond layer coated on the working face of the drill body has a thickness of 5mm, the volume fraction of CoCrWMo alloy is 85%, and the volume fraction of diamond is 15%. The raw material CoCrWMo pre-alloyed powder is used, the composition mass ratio is Co84%, Cr3%, W10%, Mo3%, and the powder particle size is 0.044-0.053mm (270 / 300 mesh). The diamond particle size used is 0.104-0.124mm (120 / 140 mesh).

[0043] Its production process is as follows:

[0044] Step 1: Prepare CoCrWMo pre-alloyed powder and diamond, wherein the composition mass ratio of CoCrWMo pre-alloyed powder is Co84%, Cr3%, W10%, Mo3%, and the particle size is 0.044~0.053mm (270 / 300 mesh); the diamond particle size i...

Embodiment 3

[0053] Such as image 3 , 4 As shown, the diamond layer-coated composite down-the-hole drill bit by the laser 3D printing method includes three parts: the drill body, the working surface of the reservoir body impregnated with the diamond layer, and the composite sheet button. The impregnated diamond layer coated on the working face of the drill bit magazine has a thickness of 5mm, the volume fraction of CoCrWMo alloy is 75%, and the volume fraction of diamond is 25%. The raw material CoCrWMo pre-alloyed powder is used, the composition mass ratio is Co82%, Cr6%, W7%, Mo5%, and the powder particle size is 0.038-0.044mm (300 / 325 mesh). The diamond particle size used is 0.12-0.15 mm (100 / 120 mesh).

[0054] Its production process is as follows:

[0055] Step 1: Prepare CoCrWMo pre-alloyed powder and diamond, wherein the composition mass ratio of CoCrWMo pre-alloyed powder is Co82%, Cr6%, W7%, Mo5%, and the particle size is 0.038~0.044mm (300 / 325 mesh); the diamond particle size...

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Abstract

The invention discloses a down-the-hole drill bit coated with a diamond layer by a laser 3D printing method and a preparation method of the down-the-hole drill bit. The down-the-hole drill bit comprises a drill bit storage body, spherical teeth installed in a groove in the working surface of the drill bit storage body, and the impregnated diamond layer, wherein the impregnated diamond layer is arranged on the surface of the working surface of the drill bit storage body, consists of a CoCrWMo alloy substrate and diamond dispersed in the CoCrWMo alloy substrate, and is arranged on the surface ofthe working surface of the drill bit storage body through the laser 3D printing method. According to the down-the-hole drill bit coated with the diamond layer by the laser 3D printing method and thepreparation method of the down-the-hole drill bit, the layer of impregnated diamond layer is arranged on the surface of the working surface of the drill bit storage body, and the combination performance of the impregnated diamond layer and the drill bit storage body is good, so that the wear resistance of the working surface of the drill bit storage body is greatly improved, ball teeth are prevented from falling off, it is ensured that the wear of the storage body in the working process of the drill bit is synchronous with the wear of hard alloy ball teeth, the service life of the drill bit isfurther prolonged, and the drilling efficiency of the drill bit is further improved.

Description

technical field [0001] The invention mainly belongs to the fields of mechanical engineering and drilling engineering, and in particular relates to a down-the-hole drill bit coated with a diamond layer by a laser 3D printing method and a preparation method thereof. Background technique [0002] As a supporting product of high-power rock drills, down-the-hole drills are mainly used in tunnels, underground mining, open-pit mines, and quarries. The down-the-hole drills break rocks by impact or impact rotation. The requirements for resistance to cracking, fatigue fracture, toughness and wear resistance are increasing. At present, the wear resistance and other performance of the down-the-hole drill bit storage body are seriously insufficient. During the working process, the storage body wears out quickly, resulting in the loss of the button teeth, shortening the service life of the drill bit and reducing the drilling efficiency of the drill bit. Contents of the invention [000...

Claims

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Application Information

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IPC IPC(8): B22F7/04B22F5/00B33Y10/00B33Y80/00C22C19/07E21B10/46E21B10/54
CPCB22F7/04B22F5/00B33Y80/00B33Y10/00E21B10/46E21B10/54C22C19/07B22F2005/001
Inventor 郭军孔祥旺何红生刘磊磊杜江张绍和肖金成蔡宁波巩书华李岩
Owner 湖南省地球物理地球化学调查所
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