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Oxide-based high-entropy alloy ceramic binding agent special for PCBN

A ceramic bond, oxide ceramic technology, applied in the field of cubic boron nitride polycrystalline (hereinafter referred to as PCBN) superhard material manufacturing, can solve the problem that high hardness metal materials are difficult to process, polycrystalline sintering temperature and pressure are high, and processing effect Not ideal, etc., to achieve the effect of improving stability

Inactive Publication Date: 2016-05-25
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problems existing in the existing PCBN binder are: 1. The polycrystalline sintering temperature and pressure are very high; 2. The hardness and strength of the polycrystalline product are not high enough; 3. The uniformity of the polycrystalline structure and performance is poor, and the product quality is not stable enough
[0004] Due to these problems, the application of PCBN polycrystalline products is limited, especially the polycrystalline used as cutting tools is not good enough, the processing effect on some hard and tough alloy steel materials is poor, and some high-hardness metal materials are difficult to process
For example, when processing cast iron, whether it is diamond polycrystalline or PCBN polycrystalline, the processing effect is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of high entropy alloy powder:

[0024] ⑴According to mass percentage: 25% chromium, 20% tungsten, 20% zirconium, 15% cobalt, 15% aluminum, 5% beryllium.

[0025] (2) The above-mentioned raw materials are prepared into powder particles with a particle size of 20 μm through crushing and sieving processes.

[0026] (3) The preparation method of high-entropy alloy powder can be carried out by one of the following two methods:

[0027] One of the methods: use elemental metal mixed powder. This method is easy to operate, according to the ingredients and proportioning required by the invention, batching and mixing are carried out. Ball milling was carried out in a three-dimensional mixer. The mixed metal powder can be used as the raw material of the binder for standby.

[0028] Method 2: Use pre-alloyed powder. This method requires pre-alloying and then powdered for use. Pre-made high-entropy alloy powder ready for use. The implementation steps are as fol...

Embodiment 2

[0036] 1. Preparation of high entropy alloy powder:

[0037] ⑴According to mass percentage: chromium 25%, tungsten 24%, zirconium 20%, cobalt 14%, aluminum 14%, beryllium 3%.

[0038] (2) The above-mentioned raw materials are prepared into powder particles with a particle size of 20 μm through crushing and sieving processes.

[0039] (3) The preparation method of high-entropy alloy powder can be carried out by one of the following two methods:

[0040] One of the methods: use elemental metal mixed powder. This method is easy to operate, according to the ingredients and proportioning required by the invention, batching and mixing are carried out. Ball milling was carried out in a three-dimensional mixer. The mixed metal powder can be used as the raw material of the binder for standby.

[0041] Method 2: Use pre-alloyed powder. This method requires pre-alloying and then powdered for use. Pre-made high-entropy alloy powder ready for use. The implementation steps are as fol...

Embodiment 3

[0049] 1. Preparation of high entropy alloy powder:

[0050] ⑴According to mass percentage: chromium 25%, tungsten 23%, zirconium 22%, cobalt 15%, aluminum 15%.

[0051] (2) The above-mentioned raw materials are prepared into powder particles with a particle size of 20 μm through crushing and sieving processes.

[0052] (3) The preparation method of high-entropy alloy powder can be carried out by one of the following two methods:

[0053] One of the methods: use elemental metal mixed powder. This method is simple and easy to operate, according to the composition and the composition of the invention requirement

[0054] Ratio, batching and mixing. Ball milling was carried out in a three-dimensional mixer. The mixed metal powder can be used as the raw material of the binder for standby.

[0055] Method 2: Use pre-alloyed powder. This method requires pre-alloying and then powdered for use. Pre-made high-entropy alloy powder ready for use. The implementation steps are as f...

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Abstract

The invention discloses an oxide-based high-entropy alloy ceramic binding agent special for PCBN. The binding agent is composed of, by mass, 30-65% of high-entropy alloy and 35-70% of oxide ceramic. The high-entropy alloy in the binding agent can form a high-mixing-entropy stable solid solution, multiple types of special effects are generated, such as a high-entropy effect on thermodynamics, a lattice deformation effect in structure, a synergistic effect among multiple components and a 'cocktail' effect in performance. Therefore, compared with traditional alloy, the high-entropy alloy can achieve homogenization and alloying more easily, the alloy melting point is lower, and excellent performance, such as high strength, high hardness, high abrasion resistance, high electric resistance, high thermal resistance and corrosion resistance, to which the traditional alloy is inferior is achieved.

Description

technical field [0001] The invention belongs to the technical field of manufacturing cubic boron nitride polycrystalline (hereinafter referred to as PCBN) superhard materials, and specifically relates to a special oxide-based high-entropy alloy ceramic binder for PCBN. Background technique [0002] There are three types of binders used in the manufacture of cubic boron nitride polycrystals: 1. Metal binder, composed of metal or alloy; 2. A vitrified bond consisting of ceramics only. 3. Metal-ceramic bond, composed of ceramic and metal or alloy. Usually composed of a metal and a ceramic, such as Ni-Si 3 N 4 . The alloys used are usually binary alloys, such as Ti-Al, and at most ternary alloys, such as Ti-Al-Mo. [0003] The problems existing in the existing PCBN binder are: 1. The polycrystalline sintering temperature and pressure are very high; 2. The hardness and strength of the polycrystalline product are not high enough; 3. The uniformity of the polycrystalline str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/12C22C30/00
CPCC22C29/12C22C30/00
Inventor 王秦生穆云超梁宝岩
Owner ZHONGYUAN ENGINEERING COLLEGE
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