Unlock instant, AI-driven research and patent intelligence for your innovation.

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

A technology of diamond layer and printing method, which is applied to drill bits, drilling equipment, earthwork drilling and mining, etc., can solve the problems of shortening the service life of the drill bit, reducing the drilling efficiency of the drill bit, and insufficient performance such as wear resistance, so as to improve the drilling efficiency, Improved impact resistance and high sintering utilization

Active Publication Date: 2022-06-21
湖南省地球物理地球化学调查所 +1
View PDF0 Cites 0 Cited by
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of down-the-hole drill bit coated with diamond layer by laser 3D printing method and preparation method thereof
  • A kind of down-the-hole drill bit coated with diamond layer by laser 3D printing method and preparation method thereof
  • A kind of down-the-hole drill bit coated with diamond layer by laser 3D printing method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] like figure 1 , 2 As shown, the cemented carbide DTH drill bit coated with diamond layer by laser 3D printing method includes three parts: the drill bit reservoir body, the working face of the reservoir body impregnated with diamond layer, and the carbide ball teeth. The thickness of the impregnated diamond layer coated on the working face of the bit reservoir is 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, and its 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 0.12-0.15mm (100 / 120 mesh).

[0030] Its production process is as follows:

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

Embodiment 2

[0042] like figure 1 ,2 As shown, the cemented carbide DTH drill bit coated with diamond layer by laser 3D printing method includes three parts: the drill bit reservoir body, the working face of the reservoir body impregnated with diamond layer, and the carbide ball teeth. The thickness of the impregnated diamond layer coated on the working face of the drill body is 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, and its 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 0.104-0.124 mm (120 / 140 mesh).

[0043] Its production process is as follows:

[0044] Step 1: Prepare CoCrWMo pre-alloyed powder and diamond. The CoCrWMo pre-alloyed powder has a mass ratio of Co84%, Cr3%, W10% and Mo3%, and the particle size is 0.044-0.053mm (270 / 300 mesh); the diamond particle size is 0.104 ~0.124...

Embodiment 3

[0053] like image 3 , 4 As shown in the figure, the composite DTH drill bit coated with diamond layer by laser 3D printing method includes three parts: the bit reservoir body, the working face of the reservoir body impregnated with diamond layer, and the spherical teeth of the composite tablet. The thickness of the impregnated diamond layer coated on the working face of the bit reservoir is 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, and its 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 0.12-0.15mm (100 / 120 mesh).

[0054] Its production process is as follows:

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

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 thereof. Diamond layer; the impregnated diamond layer is arranged on the surface of the working surface of the drill bit library body; the impregnated diamond layer is composed of a CoCrWMo alloy matrix and diamonds dispersed in the CoCrWMo alloy matrix, and the impregnated diamond layer is passed through the laser 3D The printing method is arranged on the surface of the working surface of the drill bit storage body. In the present invention, a layer of impregnated diamond layer is arranged on the surface of the working surface of the drill bit magazine body. The combination performance of the impregnated diamond layer and the drill bit magazine body is good, which can greatly improve the wear resistance of the working surface of the drill bit magazine body, thus avoiding ball The teeth fall off, ensuring that the wear of the magazine body and the wear of the carbide button teeth are synchronized during the working process of the drill bit, thereby improving the service life of the drill bit and improving the drilling efficiency of the drill bit.

Description

technical field [0001] The invention mainly belongs to the fields of mechanical engineering and drilling engineering, and particularly relates to a down-the-hole drill bit with a diamond layer coated by a laser 3D printing method and a preparation method thereof. Background technique [0002] As a supporting product of high-power rock drills, DTH bits are mainly used in tunnels, underground mining, open-pit mines and quarries and other engineering excavation construction. DTH bits break rocks by impact or impact rotation. Resistance to cracking, fatigue fracture, toughness and wear resistance are increasingly required. At present, the wear-resisting properties of the body of the down-the-hole drill are seriously insufficient. During the working process, the body of the body wears rapidly, which causes the ball teeth to fall off, which shortens the service life of the drill bit and reduces the drilling efficiency of the drill bit. SUMMARY OF THE INVENTION [0003] In view ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
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