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A wear-resistant multi-principal alloy-diamond composite material and its preparation method and application

A multi-principal element alloy and composite material technology is applied in the field of multi-principal alloy-diamond composite materials and their preparation, which can solve the problems of affecting the structure and performance of the bonding phase, easy introduction of impurities, safety hazards, etc., and improve poor stability. , the effect of excellent wear and corrosion resistance, low friction coefficient and wear rate

Active Publication Date: 2022-06-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation method of the patented bonding phase - mechanical alloying method, has obvious disadvantages. First, impurities are easily introduced during the mechanical alloying process, which affects the structure and performance of the bonding phase; Dangerous, especially when powders such as zirconium powder, magnesium powder and aluminum powder are contained, there are many potential safety hazards

Method used

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  • A wear-resistant multi-principal alloy-diamond composite material and its preparation method and application
  • A wear-resistant multi-principal alloy-diamond composite material and its preparation method and application
  • A wear-resistant multi-principal alloy-diamond composite material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] 1. Material preparation.

[0047] (1) Prepare CuNiCoCr alloy powder: select gas atomized CuNiCoCr alloy powder with a particle size of 45-100 μm, and its composition is Cu25Ni25Co25Cr25 (at.%).

[0048] (2) Prepare diamond powder: select D-grade diamond with a particle size of 150-180 μm.

[0049] (3) The above-mentioned CuNiCoCr alloy powder and diamond powder are fully mechanically mixed, and mixed powder is obtained after mixing. Among them, the volume percentage of diamond powder in the composite powder is 12.5 vol.%.

[0050] 2. Preparation of multi-principal alloy-diamond composites.

[0051] The mixed powder raw material was filled into a graphite mold, pre-pressed under a pressure of 20 MPa, and then spark plasma sintered at a sintering pressure of 30 MPa. Incubate for 5 min, increase the temperature from 400 °C to 850 °C at a heating rate of 50 °C / min, and hold for 10 min. A multi-principal alloy-diamond composite material was prepared.

[0052] 3. After g...

Embodiment 2

[0055] 1. Material preparation.

[0056] (1) Prepare CuNiCoCr alloy powder: select gas atomized CuNiCoCr alloy powder with a particle size of 45-100 μm, and its composition is Cu30Ni25Co25Cr20 (at.%).

[0057] (2) Prepare diamond powder: select D-grade diamond with a particle size of 150-180 μm.

[0058] (3) The above-mentioned CuNiCoCr alloy powder and diamond powder are fully mechanically mixed, and mixed powder is obtained after mixing. Among them, the volume percentage of the diamond powder in the composite powder is 15 vol.%.

[0059] 2. Preparation of multi-principal alloy-diamond composites.

[0060] The mixed powder raw material was filled into a graphite mold, pre-pressed under a pressure of 20 MPa, and then spark plasma sintered at a sintering pressure of 30 MPa. Incubate for 5 min, increase the temperature from 400 °C to 850 °C at a heating rate of 50 °C / min, and hold for 10 min. A multi-principal alloy-diamond composite material was prepared.

[0061] 3. After...

Embodiment 3

[0064] 1. Material preparation.

[0065] (1) Prepare CuNiCoCr alloy powder: select gas-atomized CuNiCoCr alloy powder with a particle size of 45-100 μm, and its composition is Cu35Ni25Co25Cr15 (at.%).

[0066] (2) Prepare diamond powder: select D-grade diamond with a particle size of 150-180 μm.

[0067] (3) The above-mentioned CuNiCoCr alloy powder and diamond powder are fully mechanically mixed, and mixed powder is obtained after mixing. Among them, the volume percentage of the diamond powder in the composite powder is 20 vol.%.

[0068] 2. Preparation of multi-principal alloy-diamond composites:

[0069] The mixed powder raw material was filled into a graphite mold, pre-pressed under a pressure of 20 MPa, and then spark plasma sintered at a sintering pressure of 30 MPa. Incubate for 5 min, increase the temperature from 400 °C to 850 °C at a heating rate of 50 °C / min, and hold for 10 min. A multi-principal alloy-diamond composite material was prepared.

[0070] 3. After...

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Abstract

The invention belongs to the field of preparation of composite materials, and in particular relates to a multi-principal alloy-diamond composite material and its preparation method and application. The raw materials of the composite material include 80-95vol.% binder phase powder and 5-20vol% diamond. The binder phase powder used is composed of Cu, Ni, Co, Cr in atomic ratio (20-40):(20-30):(20-30):(10-20). The preparation method is as follows: after fully mixing the bonding phase powder and the diamond powder, the spark plasma sintering process is used to sinter at 800-1000°C to obtain the product. The material has good interfacial bonding, diamond stability, and friction and wear properties. The multi-principal element alloy-diamond composite material designed and prepared by the present invention can be used to prepare grinding diamond-like tools such as diamond grinding discs and diamond grinding wheels.

Description

technical field [0001] The invention belongs to the field of preparation of composite materials, in particular to a multi-principal alloy-diamond composite material and a preparation method and application thereof. Background technique [0002] At present, the metal bonding phases of diamond abrasive tools (grinding discs, grinding wheels, etc.) are mainly copper-based and cobalt-based bonding phases, or some low-temperature metals or alloys, trace non-metallic elements, etc. are added to them to improve the bonding phase matrix. strength and enhance the holding power of the matrix to the diamond particles. However, the traditional metal-based bonding phase is easy to form harmful products such as metal compounds and gaps, and it is difficult to ensure the stability of the microstructure and properties of the bonding phase, and cannot fully meet the requirements of actual grinding processing. More and more researchers have begun to design and prepare multi-principal alloys ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C26/00C22C30/00B22F3/105C22C1/05
CPCC22C26/00C22C30/00C22C1/05B22F3/105B22F2003/1051
Inventor 刘咏高阳张伟
Owner CENT SOUTH UNIV
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