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

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

Example Embodiment

[0028] Example 1:

[0029] Such as figure 1 , 2 As shown, the laser 3D printing method coated the hard alloy of the diamond layer, including the drill bore, the reservoir work face the diamond layer, the hard alloy ball teeth. The gestational diamond layer coated with a drill bore is 5 mm, and the volume fraction of the CoCrwmo alloy is 75%, and the volume fraction of diamond is 25%. The ratio of the material COCRWMO pre-gold powder is CO82%, Cr6%, W7%, MO5%, and the powder particle size is 0.038 ~ 0.044 mm (300 / 325). The diamond particles used were 0.12 to 0.15 mm (100 / 120).

[0030] Its production process is:

[0031] Step 1: Prepare CoCrwmo Pre-preparation powder and diamonds, wherein the mass ratio of CoCrwmo preload powder is CO82%, Cr6%, W7%, mo5%, particle size of 0.038 ~ 0.044mm (300 / 325); diamond particle size is 0.12 ~ 0.15mm (100 / 120);

[0032] Step 2: Coinci-CoCrwmo Preloading powder and diamonds required in accordance with the proportion of steps;

[0033] Step 3: Mi...

Example Embodiment

[0041] Example 2:

[0042] Such as figure 1 ,2 As shown, the laser 3D printing method coated the hard alloy of the diamond layer, including the drill bore, the reservoir work face the diamond layer, the hard alloy ball teeth. The metallic diamond layer coated with a drill bore has a thickness of 5 mm, and the volume fraction of the CoCrWMO alloy is 85%, and the volume fraction of diamond is 15%. The ratio of the material CoCrwmo pre-gold powder is CO84%, CR3%, W10%, MO3%, and the powder particle size is 0.044 to 0.053 mm (270 / 300). The diamond particles used were 0.104 to 0.124 mm (120 / 140 mesh).

[0043] Its production process is:

[0044] Step 1: Prepare CoCrwmo Pre-preparation powder and diamond, where CoCrWMO pre-gold powder has CO84%, CR3%, W10%, mo 3%, particle size of 0.044 to 0.053 mm (270 / 300); diamond granularity is 0.104 ~ 0.124mm (120 / 140 mesh);

[0045] Step 2: Coinci-CoCrwmo Preloading powder and diamonds required in accordance with the proportion of steps;

[0046]...

Example Embodiment

[0052] Example 3:

[0053] Such as image 3 , 4 , The composite sheet 3D laser printing method DTH layer coated diamond drill bit storage body comprising three parts, impregnated diamond layer face to the library, the composite sheet ball gear. The gestational diamond layer coated with a drill bore is 5 mm, and the volume fraction of the CoCrwmo alloy is 75%, and the volume fraction of diamond is 25%. The ratio of the material COCRWMO pre-gold powder is CO82%, Cr6%, W7%, MO5%, and the powder particle size is 0.038 ~ 0.044 mm (300 / 325). The diamond particles used were 0.12 to 0.15 mm (100 / 120).

[0054] Its production process is:

[0055] Step 1: Prepare CoCrwmo Pre-preparation powder and diamonds, wherein the mass ratio of CoCrwmo preload powder is CO82%, Cr6%, W7%, mo5%, particle size of 0.038 ~ 0.044mm (300 / 325); diamond particle size is 0.12 ~ 0.15mm (100 / 120);

[0056] Step 2: Coinci-CoCrwmo Preloading powder and diamonds required in accordance with the proportion of steps;

...

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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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