A single tooth head cemented carbide composite column tooth and its preparation method

A technology of cemented carbide and composite columns, which is applied in metal processing equipment, drill bits, earthwork drilling and mining, etc., can solve the problem that the cemented carbide column teeth cannot take into account wear resistance and toughness at the same time, and achieve enhanced wear resistance, high Abrasion resistance and the effect of prolonging the service life

Active Publication Date: 2020-11-06
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A single tooth head cemented carbide composite column tooth and its preparation method
  • A single tooth head cemented carbide composite column tooth and its preparation method
  • A single tooth head cemented carbide composite column tooth and its preparation method

Examples

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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

A single-tooth head cemented carbide composite column tooth and its preparation method, the single-tooth head cemented carbide composite column tooth is designed into a tooth head and a tooth body in the height direction, including the following steps: Step 1. Prepare the tooth body Raw materials and tooth head raw materials; the tooth head includes 10~20wt% carbonized spherical cast tungsten carbide particles, 1~7wt% wax-based composite molding agent, and the balance is tooth body raw materials. Step 2. The gear head raw material and the tooth body raw material are respectively added to the mold through a co-injection molding method or a step-by-step charging molding method to obtain a soft cylindrical tooth blank with a composite structure. Step 3. In an inert gas atmosphere, sinter the composite structure of the column tooth soft billet obtained in step 2 under high temperature and low pressure, and a metallurgical reaction occurs at the bonding interface between the tooth head and the tooth body to form a transition layer, and the tooth head and the tooth body are integrally formed. Single tooth head cemented carbide composite column teeth. It solves the technical problem that the existing cemented carbide column teeth cannot simultaneously take into account wear resistance and toughness.

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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Patent Type & Authority Patents(China)
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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