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A kind of preparation method of high entropy alloy matrix diamond cutter head

A diamond cutter head and high-entropy alloy technology, which is applied in the field of preparation of high-entropy alloy matrix diamond cutter head, can solve the problem of complete and uniform mixing of difficult powder materials, insufficient heating uniformity of hot pressing sintering, unstable quality of diamond cutter heads, etc. problems, to achieve the effects of optimized carcass performance, good wettability, sharpness and wear resistance

Active Publication Date: 2022-07-29
湖北银天钻石科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the fact that it is difficult to achieve complete uniform mixing of powder materials in this process, especially the uniform mixing in microscopic morphology, there are huge differences in the wettability and holding force of diamonds by various elemental metal powders in contact with diamond particles, and the heat in the entire mold Insufficient heating uniformity of pressure sintering often leads to unstable quality of diamond cutter head, or unsharp drilling and cutting, or insufficient wear resistance, or serious grain loss

Method used

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  • A kind of preparation method of high entropy alloy matrix diamond cutter head

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preparation example Construction

[0019] like figure 1 As shown, a preparation method of a high-entropy alloy matrix diamond cutter head comprises the following steps:

[0020] Step 1. After mixing Cu powder, Sn powder, Cr powder, Ti powder and Fe powder, use mechanical alloying method to prepare high-entropy pre-alloyed powder. The high-entropy pre-alloyed powder contains Cu powder, Sn powder and Cr powder. The atomic fractions of powder, Ti powder and Fe powder are all in the range of 5%-35%;

[0021] Step 2, adding diamond, high-entropy pre-alloyed powder, wear-resistant auxiliary materials and improving agent into the three-dimensional mixer, mixing and stirring for 30-60 minutes, and obtaining powder after stirring;

[0022] Step 3, put the powder material into a graphite mold, and place it in a vacuum hot press for hot pressing and sintering. The hot pressing temperature is 850-900 ° C, the pressure is 240 KN, and the heat preservation and pressure are maintained for 2-3 minutes to obtain a diamond cutt...

Embodiment 1

[0028] Embodiment 1, a kind of preparation method of high entropy alloy matrix diamond cutter head, comprises the following steps:

[0029] Step 1. After mixing Cu powder, Sn powder, Cr powder, Ti powder and Fe powder, use mechanical alloying method to prepare high-entropy pre-alloyed powder. In this embodiment, Cu powder, Sn powder and Cr powder are described The atomic fractions of , Ti powder and Fe powder are 20%, 20%, 20%, 20% and 20%, respectively;

[0030] Step 2. Add 40 parts by mass of titanium-coated diamond, 25 parts by mass of high-entropy pre-alloy powder, 10 parts by mass of wear-resistant auxiliary materials and 0.1 part by mass of improver into the three-dimensional mixer, mix and stir for 60 minutes, and stir. After completion, powder material is obtained;

[0031] Step 3, put the powder material into a graphite mold, and place it in a vacuum hot press for hot pressing and sintering. The hot pressing temperature is 850° C., the pressure is 240 KN, and the hea...

Embodiment 2

[0032] Embodiment 2, a kind of preparation method of high entropy alloy matrix diamond cutter head, comprises the following steps:

[0033] Step 1. After mixing Cu powder, Sn powder, Cr powder, Ti powder and Fe powder, use mechanical alloying method to prepare high-entropy alloy powder. In this embodiment, Cu powder, Sn powder, Cr powder, The atomic fractions of Ti powder and Fe powder are 30%, 20%, 10%, 10% and 30%, respectively;

[0034] Step 2. Add 50 parts by mass of diamond, 30 parts by mass of high-entropy pre-alloy powder, 20 parts by mass of wear-resistant auxiliary materials and 1 part by mass of improver into the three-dimensional mixer, and mix and stir for 60 minutes. get powder;

[0035] Step 3, put the powder material into a graphite mold, and place it in a vacuum hot press for hot pressing and sintering. The hot pressing temperature is 900° C., the pressure is 240 KN, and the heat preservation and pressure are maintained for 3 minutes to obtain a diamond cutter...

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Abstract

The invention relates to a preparation method of a high-entropy alloy matrix diamond cutter head, which comprises the following steps: Step 1. After mixing Cu powder, Sn powder, Cr powder, Ti powder and Fe powder, a mechanical alloying method is used to prepare High-entropy pre-alloyed powder, the atomic fractions of Cu powder, Sn powder, Cr powder, Ti powder and Fe powder in the high-entropy pre-alloyed powder are all in the range of 5%-35%; step 2, diamond, high-entropy pre-alloyed powder The powder, wear-resistant auxiliary materials and improving agent are added into the three-dimensional mixer, mixed and stirred for 30-60 minutes, and the powder is obtained after the stirring is completed; step 3, the powder is loaded into a graphite mold, and placed in a vacuum hot press for heating Press sintering to obtain a diamond cutter head. The microstructure of the cutter head matrix material prepared by the invention has the characteristics of high entropy alloy, that is, serious lattice distortion, atomic retardation diffusion effect and cocktail effect, the matrix performance is greatly optimized, the surface microhardness is high, Good corrosion resistance and high tensile strength.

Description

technical field [0001] The invention relates to the technical field of diamond tools, in particular to a preparation method of a high-entropy alloy matrix diamond cutter head. Background technique [0002] There are many kinds of diamond cutter head matrix materials, and most of them use a variety of simple metal powders, or some basic pre-alloyed powders, which are mixed and used according to a certain ratio. The metal powders used are mainly Cu powder, Sn powder, Ni powder, Fe powder, Zn powder, Ti powder, Cr powder, Co powder, WC powder, and the pre-alloyed powders used are Cu-Fe alloy, Cu-Sn alloy, Cu-Zn alloy powder, other ternary or quaternary pre-alloyed powder. The various powders used are weighed according to a certain proportion. After being fully mixed by a three-dimensional mixer, a certain concentration of diamond is added, stirred evenly, and then put into a hot-pressing sintering machine, and sintered at high temperature and high pressure to form a diamond cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/05C22C26/00B22F3/14B22F9/04B22F1/12B22F1/18B22F5/00
CPCC22C1/05C22C26/00B22F3/14B22F9/04B22F5/00C22C2026/006B22F2009/041B22F2005/001B22F1/052B22F1/17
Inventor 熊才华刘全心
Owner 湖北银天钻石科技有限公司