Ti (C, N)-based metal ceramic with honeycomb structure and preparation method of Ti (C, N)-based metal ceramic

A cermet, honeycomb technology, applied in the field of powder metallurgy, can solve the problems of low fracture toughness and low comprehensive mechanical properties, and achieves the effect of simple process, simple process and convenient industrial application.

Active Publication Date: 2022-07-15
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a Ti(C,N)-based cermet with a honeycomb structure and a preparation method thereof, so that the cermet microstructure has a relatively uniform honeycomb microstructure while having a bimodal distribution characteristic. structure, to solve the problem of low fracture toughness and low comprehensive mechanical properties of cermets under high hardness conditions

Method used

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  • Ti (C, N)-based metal ceramic with honeycomb structure and preparation method of Ti (C, N)-based metal ceramic
  • Ti (C, N)-based metal ceramic with honeycomb structure and preparation method of Ti (C, N)-based metal ceramic

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Embodiment 1

[0038] 1. Preparation of mixture 1: with TiO 2 Powder, TiN powder and graphite powder are used as raw materials, and 4 kinds of mixed powders 1 are prepared according to Table 1, placed in a planetary ball mill for ball milling, and anhydrous ethanol is added as a ball milling medium, and the amount added is 1.2 times the weight of the mixture 1. It is 6:1, the ball mill speed is 250rpm, and the ball milling time is 18h;

[0039] 2. Preparation of mixture 2: Add coarse particles of Ti(C,N), Ni, Mo to the mixed slurry 1 obtained in step 1 2 C, WC, Cr 3 C 2 , AlN and graphite powder, prepare 4 kinds of mixtures 2 according to Table 2, and continue to place them in a planetary ball mill for ball milling, and add anhydrous ethanol as a ball milling medium, and the addition amount is 1.4 times the weight difference between mixture 2 and mixture 1 , the ball-to-material ratio is 7:1, the ball mill speed is 180rpm, and the ball milling time is 14h;

[0040] 3. Drying: drying the ...

Embodiment 2

[0050] The preparation steps of the cermet of the present embodiment are as follows:

[0051] 1. Preparation of mixture 1: with TiO 2 Powder, TiN powder and graphite powder are used as raw materials, and 4 kinds of mixed powders 1 are prepared according to Table 1, placed in a planetary ball mill for ball milling, and anhydrous ethanol is added as a ball milling medium, and the amount added is 1.3 times the weight of the mixture 1. It is 6:1, the ball mill speed is 200rpm, and the ball milling time is 28h;

[0052] 2. Preparation of mixture 2: Add coarse particles of Ti(C,N), Ni, Mo to the mixed slurry 1 obtained in step 1 2 C, WC, Cr 3 C 2 , AlN and graphite powder, prepare 4 kinds of mixtures 2 according to Table 2, and continue to place them in a planetary ball mill for ball milling, and add anhydrous ethanol as a ball milling medium, and the amount added is 1.3 times the weight difference between mixture 2 and mixture 1 , the ball-to-material ratio is 7:1, the ball mil...

Embodiment 3

[0062] The preparation steps of the cermet of the present embodiment are as follows:

[0063] 1. Preparation of mixture 1: with TiO 2 Powder, TiN powder and graphite powder are used as raw materials, and 4 kinds of mixed powders 1 are prepared according to Table 1, placed in a planetary ball mill for ball milling, and anhydrous ethanol is added as a ball milling medium, and the amount added is 1.4 times the weight of the mixture 1. It is 6:1, the ball mill speed is 300rpm, and the ball milling time is 24h;

[0064] 2. Preparation of mixture 2: Add coarse particles of Ti(C,N), Ni, Mo to the mixed slurry 1 obtained in step 1 2 C, WC, Cr 3 C 2 , AlN and graphite powder, prepare 4 kinds of mixtures 2 according to Table 2, and continue to place them in a planetary ball mill for ball milling, and add anhydrous ethanol as a ball milling medium, and the addition amount is 1.2 times the weight difference between mixture 2 and mixture 1 , the ball-to-material ratio is 7:1, the ball ...

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Abstract

The invention discloses a Ti (C, N)-based metal ceramic with a honeycomb structure and a preparation method thereof, and the preparation method comprises the following steps: firstly, proportioning TiO2, TiN and graphite powder as raw materials to obtain a mixture 1; then Ti (C, N), Ni, Mo2C, WC, Cr3C2, AlN and graphite powder are added into the slurry of the obtained mixture 1, a mixture with the mass fraction of Ti being 40.46-43.65, the mass fraction of Ni being 14.03-19.78, the mass fraction of Mo being 9.90-10.15, the mass fraction of Cr being 0.76-0.79, the mass fraction of Al being 0.46-0.49, the mass fraction of W being 4.94-5.06, the mass fraction of O being 5.76-7.02, the mass fraction of C being 11.59-13.17 and the mass fraction of N being 5.92-6.07 is prepared, the obtained slurry is dried in a vacuum infrared drying box at the temperature of 90-110 DEG C, and mixed powder 2 is obtained; the Ti (C, N)-based metal ceramic with the honeycomb structure is obtained through the procedures of forming agent adding, compression molding, forming agent removing, vacuum sintering and the like on the dried mixed powder 2, and the comprehensive mechanical property of the Ti (C, N)-based metal ceramic is excellent. The method has no special requirements on production equipment, and is simple in process, low in cost and beneficial to industrial popularization.

Description

technical field [0001] The invention relates to a Ti(C,N)-based cermet with a honeycomb structure and a preparation method thereof, belonging to the technical field of powder metallurgy. Background technique [0002] With its excellent wear resistance, red hardness, chemical stability, high temperature oxidation resistance and low friction coefficient with metals, Ti(C,N)-based cermets have gradually been favored by the industrial field. As a tool, Ti(C,N)-based cermet tool can be well adapted to high-speed and high-efficiency dry cutting, greatly improving cutting efficiency and service life, and also has a lower manufacturing cost than cemented carbide, Ti ( C,N)-based cermets have shown great potential as an upgraded alternative to conventional WC-Co cemented carbides. In addition to the field of cutting tools, cermet materials also have great application potential in molds, wear parts, seals, aerospace, petroleum, mining, automobiles and other fields. Although cermet h...

Claims

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Application Information

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IPC IPC(8): C22C29/04B22F1/10B22F3/10B22F3/11C22C1/05
CPCC22C29/04C22C29/005C22C1/051B22F3/1115B22F3/1007
Inventor 郑勇徐翔宇梁海峰杨敏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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