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Preparation method of PDC drill bit matrix material

A technology of matrix material and drill bit, which is applied in the field of matrix material preparation and PDC bit matrix material preparation, can solve the problems of metal loss, high-entropy alloy structure relaxation, difficult metal powder, etc., to improve strength and toughness, gap The effect of high uniformity and uniform alloy

Active Publication Date: 2021-08-10
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are two problems in the existing matrix material preparation method: one is that it is difficult to uniformly disperse the added metal powder around the carbide hard phase by means of vibration; the other is that the copper alloy used for impregnating the alloy has high entropy Although melting can improve the performance of the matrix material, after the high-entropy copper alloy is melted at high temperature during the infiltration process, the low-melting point metal in it is easy to lose, and the structure of the high-entropy alloy will relax, making it difficult to maintain the high-entropy alloy. phase structure, it is difficult to give full play to the performance advantages of high-entropy alloys

Method used

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  • Preparation method of PDC drill bit matrix material

Examples

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example 1

[0018] Example 1: Prepare the PDC drill bit matrix material according to the following steps

[0019] (1) Preparation of skeleton material powder containing high-entropy alloy: cast tungsten carbide, single crystal tungsten carbide powder and AlCoCrFeNiCu high-entropy alloy powder are prepared into skeleton material powder. AlCoCrFeNiCu has a face-centered cubic and body-centered cubic eutectic structure, and its The proportion in the mixed powder is 3wt.%, single crystal tungsten carbide accounts for 32wt.%, and the rest is cast tungsten carbide; the skeleton powder is put into a planetary ball mill for 4h dry mixing, and the speed of the ball mill is 150r / min, so as to prepare Produce skeleton material powder containing high entropy alloy;

[0020] (2) Preparation of agarose sol: add agarose to deionized water to prepare a 2wt.% solution, put it in a constant temperature water bath and keep it at 85°C for 2 hours, stir during the heat preservation process, and the stirring s...

example 2

[0024] Example 2: Prepare the PDC drill bit matrix material according to the following steps

[0025] (1) Preparation of skeleton material powder containing high-entropy alloy: cast tungsten carbide, single crystal tungsten carbide powder and AlCoCrFeNiCu high-entropy alloy powder are prepared into skeleton material powder. AlCoCrFeNiCu has a face-centered cubic and body-centered cubic eutectic structure, and its The proportion in the mixed powder is 4wt.%, single crystal tungsten carbide accounts for 45wt.%, and the rest is cast tungsten carbide; the skeleton powder is put into a planetary ball mill for 3h dry mixing, and the speed of the ball mill is 250r / min, so as to prepare Produce skeleton material powder containing high entropy alloy;

[0026] (2) Preparation of agarose sol: add agarose to deionized water to prepare a 4wt.% solution, put it in a constant temperature water bath and keep it at 90°C for 3 hours, stir during the heat preservation process, and the stirring s...

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Abstract

The invention discloses a preparation method of a PDC drill bit matrix material. The preparation method is characterized by comprising the following steps of adding a high-entropy alloy of a face-centered cubic and body-centered cubic phase eutectic structure into cast tungsten carbide and single crystal tungsten carbide powder, performing mixing, adding agarose sol to form slurry, then, injecting the slurry into a mold, performing drying for forming, and finally, adding a copper-based impregnated alloy and performing infiltration in a vacuum furnace to form the PDC drill bit matrix material containing the uniformly distributed face-centered cubic and body-centered cubic phase eutectic structure high-entropy alloy. The problem that tungsten carbide and metal additives are difficult to uniformly disperse in an existing preparation method of the PDC drill bit matrix material is solved, the hardness of the PDC drill bit matrix material is higher than or equal to 30 HRC, the bending strength is higher than or equal to 600 MPa, the impact toughness is higher than or equal to 4 J, and the comprehensive mechanical property is excellent.

Description

technical field [0001] The invention relates to a method for preparing a matrix material, in particular to a method for preparing a matrix material for a PDC drill bit, and belongs to the field of composite materials. Background technique [0002] In oil extraction, the use of PDC (diamond compact) drill bits is becoming more and more common. The PDC bit is composed of PDC cutting teeth and matrix material. The PDC cutting teeth are embedded in the matrix. The comprehensive properties of the matrix such as hardness, wear resistance, strength, and toughness are very important for the performance of the PDC bit. Academic and industrial circles attach great importance to the research on matrix materials and their preparation methods. CN201911079586.4 discloses a drill matrix material and a preparation method thereof, the composition of which includes 45.0-65.0% of tungsten carbide hard particles and 35.0-55.0% of copper-containing multi-principal element high-entropy alloy. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/10B22F9/04
CPCC22C29/08C22C29/067C22C1/1036B22F9/04B22F2009/043C22C1/1057
Inventor 郭智兴高栗寒林霜岚华涛熊计荆凯峰鲜广杨天恩
Owner SICHUAN UNIV