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Toughened metal ceramic and preparation method thereof

A cermet and toughening technology, which is applied in the field of toughened cermet and its preparation, can solve the problems of limitations, insufficient strength and toughness, etc., achieve good matching, improve comprehensive performance, and expand the application range

Inactive Publication Date: 2018-06-12
株洲锐利诚切削工具有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, Ti(C,N)-based cermets have high hardness and high thermal conductivity. Compared with traditional coated cemented carbide, they have better red hardness, wear resistance, crater wear resistance, and oxidation resistance. It is an ideal material for making high-speed and high-efficiency cutting tools, but its general lack of strength and toughness greatly limits the application of Ti(C,N)-based cermets.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] When batching, it is 10% Co+Ni powder by weight, 25% WC powder, 12% Mo, and the balance is Ti(C, N) powder, totaling 100%; with absolute alcohol as the ball milling medium, liquid-solid The ratio is 500ml / Kg, the mass ratio of the ball material is 10:1, the ball milling time is 80 hours, and the mixture is obtained by spray drying. After molding, it is placed in a pressure sintering furnace for sintering at 1460°C. Take PS21 (6.5×5.25×20mm in size) sample bar as a standard product for testing the cermet prepared by the method in this example. The average grain size of the hard phase is 1.0 μm, the bending strength is 1400 MPa, and the hardness Hv 30 1700.

Embodiment 2

[0015] When batching, it is 12% Co+Ni powder by weight, 23% WC powder, 11% Mo, and the balance is Ti(C, N) powder, totaling 100%; with absolute alcohol as the ball milling medium, liquid-solid The ratio is 480ml / Kg, the mass ratio of the ball material is 10:1, the ball milling time is 75 hours, and the mixture is obtained by spray drying. After molding, it is placed in a pressure sintering furnace for sintering at 1450°C. Take PS21 (size 6.5×5.25×20㎜) sample bar as a standard product for testing the cermet prepared by the method of this embodiment, the average grain size of the hard phase is 1.0 μm, the bending strength is 1600MPa, and the hardness Hv 30 1660.

Embodiment 3

[0017] When batching, it is 15% Co+Ni powder by weight, 21% WC powder, 11% Mo, and the balance is Ti(C, N) powder, totaling 100%; with absolute alcohol as the ball milling medium, liquid-solid The ratio is 460ml / Kg, the mass ratio of the ball material is 9:1, the ball milling time is 72 hours, the mixture is spray-dried, and after molding, it is placed in a pressure sintering furnace for sintering at 1450°C. Take PS21 (size 6.5×5.25×20㎜) sample bar as a standard product for testing the cermet prepared by the method in this example. The average grain size of the hard phase is 1.0 μm, the bending strength is 1800 MPa, and the hardness Hv 30 1600.

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PUM

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Abstract

The invention discloses a toughened metal ceramic and a preparation method thereof. The toughened metal ceramic is prepared from the following components in percentage by mass: 8.0 to 20.0 percent ofCo+Ni powder, 5.0 to 35 percent of WC powder, 10 to 15 percent of Mo, and the balance Ti (C, N) powder, wherein the total amount is 100 percent. According to the toughened metal ceramic and the preparation method thereof provided by the invention, the toughness and the breaking strength of the metal ceramic can be greatly improved, the high-temperature hardness and the toughness are well-matched,and a combination property of the metal ceramic is improved.

Description

technical field [0001] The invention relates to a toughened cermet and a preparation method thereof. Background technique [0002] At present, Ti(C,N)-based cermets have high hardness and high thermal conductivity. Compared with traditional coated cemented carbide, they have better red hardness, wear resistance, crater wear resistance, and oxidation resistance. It is an ideal material for making high-speed and high-efficiency cutting tools, but its general lack of strength and toughness greatly limits the application of Ti(C,N)-based cermets. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a toughened cermet, which can greatly improve the toughness and fracture resistance of the cermet, so as to achieve a good match between high temperature hardness and toughness, and improve the toughness of the cermet. Comprehensive performance. [0004] In order to solve the above te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/04C22C1/05
Inventor 周悫昱
Owner 株洲锐利诚切削工具有限公司
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