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Single-stud head hard alloy composite stud 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 that cemented carbide column teeth cannot take into account wear resistance and toughness at the same time, so as to enhance wear resistance, improve The effect of toughness, high wear resistance

Active Publication Date: 2020-08-21
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a single tooth head cemented carbide composite column tooth and its preparation method, and its purpose is to solve the technical problem that the existing cemented carbide column tooth cannot take into account both wear resistance and toughness

Method used

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  • Single-stud head hard alloy composite stud and preparation method thereof
  • Single-stud head hard alloy composite stud and preparation method thereof
  • Single-stud head hard alloy composite stud and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0060] A method for preparing a single tooth 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 te...

Embodiment 2

[0070] A method for preparing a single tooth head cemented carbide composite column tooth, the preparation process is shown in the appendix Figure 4 , 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, 2.5wt% wax-based composite molding agent, and the balance is the raw material of the tooth body 3; weighed by weight Each component is first placed in a kneader f...

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 cemented carbide column teeth, the prepared single-tooth-head cemented carbide composite column has a hardness of 0.8HRA and a wear resistance of 55%. 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 .

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Abstract

The invention relates to a single-stud head hard alloy composite stud and a preparation method thereof. The single-stud head hard alloy composite stud is designed into a stud head and a stud body in the height direction. The preparation method comprises the following steps of step I, preparing the stud body raw materials and the stud head raw materials, wherein the stud head comprises 10-20wt% ofspherical casting tungsten carbide granules after carbonization, 1-7wt% of ceryl composite molding agents, and the balance stud body raw materials; step II, adding the stud head raw materials and thestud body raw materials to the molds through a joint injection molding method or a batch charging compression moulding forming method to obtain a stud soft blank having a composite structure; and stepIII, under inert gas atmosphere, performing high-temperature low-pressure sintering on the stud soft blank having the composite structure obtained in the step II, enabling a combination interface ofthe stud head and the stud body to generate a metallurgy reaction to form a transition layer, and integrally forming the stud head and the stud body to obtain the single-stud head hard alloy compositestud. Through the adoption of the single-stud head hard alloy composite stud disclosed by the invention, the technical problem that a conventional hard alloy stud cannot take account of wear resistance and tenacity synchronously is solved.

Description

technical field [0001] The invention relates to the field of cemented carbide materials, in particular to a cemented carbide composite column tooth with a single tooth head 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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