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Multi-tooth-head hard alloy composite cylindrical tooth and preparation method thereof

A cemented carbide and composite column technology, which is used in metal processing equipment, drill bits, earthwork drilling, etc., can solve the problem of low drilling speed, the inability of cemented carbide column teeth to take into account wear resistance and toughness at the same time, and insufficient wear resistance. and other problems to achieve the effect of improving wear resistance, enhancing wear resistance and improving toughness

Active Publication Date: 2020-07-28
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a multi-head cemented carbide composite column tooth and its preparation method. Technical problems of insufficient abrasiveness and low drilling speed

Method used

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  • Multi-tooth-head hard alloy composite cylindrical tooth and preparation method thereof
  • Multi-tooth-head hard alloy composite cylindrical tooth and preparation method thereof
  • Multi-tooth-head hard alloy composite cylindrical tooth and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] A method for preparing a multi-head cemented carbide composite column tooth, the preparation process is shown in the appendix image 3 , the preparation method comprises the following steps:

[0061] Step 1. Prepare raw materials for tooth body 3 and tooth head 2;

[0062] The tooth body 3 includes the following components by weight: 6wt% cobalt powder, 2wt% paraffin wax molding agent, and the balance is conventional tungsten carbide powder; each component is weighed by weight, and then wet-milled and dried. The raw material of the tooth body 3 is obtained through particle processing; the particle size of the conventional tungsten carbide powder is 3 μm.

[0063] The tooth head 2 includes the following components by weight: 10wt% carbonized spherical cast tungsten carbide particles, 6wt% wax-based composite molding agent, and the balance is the raw material of the tooth body 3; The components are first placed in a kneader for kneading treatment, the kneading temperatu...

Embodiment 2

[0070] A method for preparing a multi-head cemented carbide composite column tooth, the preparation process is shown in the appendix image 3 , the preparation method comprises the following steps:

[0071] Step 1. Prepare raw materials for tooth body 3 and tooth head 2;

[0072] The tooth body 3 includes the following components by weight: 8wt% cobalt powder, 2wt% paraffin wax molding agent, and the balance is conventional tungsten carbide powder; each component is weighed according to weight content, and then wet-milled and dried. The raw material of the tooth body 3 is obtained through particle processing; the particle size of the conventional tungsten carbide powder is 6 μm.

[0073] The tooth head 2 includes the following components by weight: 20wt% carbonized spherical cast tungsten carbide particles, 5wt% wax-based composite molding agent, and the balance is the raw material of the tooth body 3; The components are first placed in a kneader for kneading treatment, the ...

Embodiment 3

[0080]A method for preparing a single tooth head cemented carbide composite column tooth, the difference from Example 1 is that the tooth head 2 includes 20wt% carbonized spherical cast tungsten carbide particles, and other raw materials, process parameters, steps, etc. are the same . Compared with the traditional single-head cemented carbide column teeth, the prepared single-head cemented carbide composite teeth have a hardness of 0.7HRA and a 75% increase in wear resistance. The toughness is equivalent to that of traditional cemented carbide columns, and the fracture toughness of the prepared single-head cemented carbide composite columns is 16.4MPa m 1 / 2 , The drilling speed is increased by 35%, which significantly improves the service life and drilling efficiency of the drilling tool.

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Abstract

The invention discloses a multi-tooth-head hard alloy composite cylindrical tooth and a preparation method thereof. A hard alloy composite cylindrical tooth is designed into a tooth head part and a tooth body part in the height direction, the tooth head part comprises 2-3 tooth heads, and the tooth heads are distributed in an axial symmetry mode. The preparation method comprises the steps that 1,a tooth body raw material and a tooth head raw material are prepared; each tooth head comprises 10 wt% - 20 wt% of carbonized spherical cast tungsten carbide particles, 1wt% - 7 wt% of a wax-based composite molding agent and the balance the tooth body raw material; 2, the tooth head raw material and the tooth body raw material are injected into a mold through a co-injection molding method to obtain a cylindrical tooth soft blank with a composite structure; and 3, the cylindrical tooth soft blank with the composite structure is subjected to high-temperature and low-pressure sintering treatment,a transition layer is formed through metallurgical reaction of the bonding interface between the tooth heads and the tooth body, and the multi-tooth-head hard alloy composite cylindrical tooth is obtained through integral molding. The technical problem that the existing hard alloy cylindrical tooth cannot give consideration to abrasion resistance and toughness at the same time is solved, the abrasion resistance and the rock breaking efficiency of the cylindrical tooth are remarkably improved, and therefore the service life of a drilling tool is prolonged, and the drilling speed is increased.

Description

technical field [0001] The invention relates to the field of cemented carbide materials, in particular to a cemented carbide post with a multi-tooth head composite structure and a preparation method thereof. Background technique [0002] Carbide column teeth are widely used in various specifications of impact and down-the-hole drill bits, oil-used roller cone bits, and mine-used roller cone bits. Carbide column teeth include tooth head and tooth body, which are divided according to the shape of the tooth head, mainly including spherical teeth, conical teeth, elastic teeth, wedge teeth, airfoil teeth, flat teeth, saw teeth, etc. The tooth body of the tooth is generally cylindrical. [0003] Cemented carbide column teeth generally use refractory tungsten carbide as the hard phase and metal cobalt as the cemented carbide material. Although cemented carbide has high hardness, toughness, wear resistance and corrosion resistance, but When the cemented carbide column teeth are in...

Claims

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Application Information

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IPC IPC(8): B22F5/00B22F1/00B22F3/22B22F7/06C22C29/08E21B10/46
CPCB22F5/00B22F7/06B22F3/225C22C29/08C22C29/067E21B10/46B22F2005/001B22F2207/03B22F2998/10B22F2999/00B22F1/102B22F2201/10B22F3/1007B22F3/1021
Inventor 徐纯芳黄庆明罗蒙杨汉民余立新
Owner SHAREATE TOOLS
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