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Preparation method of high-toughness non-magnetic Ti(C,N)-based metal ceramic

A technology of high strength and toughness and base metal, applied in the field of powder metallurgy, can solve the problems of reducing the toughness of materials, and achieve the effect of improving toughness, increasing activity, and enhancing interface bonding strength

Active Publication Date: 2019-04-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: the purpose of the present invention is to provide a method for preparing a high-strength and ductile non-magnetic Ti(C,N)-based cermet, which solves the problem that the existing Ti(C,N)-based cermet will be greatly reduced while obtaining room temperature non-magnetic Problems that reduce the toughness of the material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 1. Preparation of intermediate reaction products: TiO 2 Powder, W powder and activated carbon powder are raw materials, and according to Table 1, prepare 4 kinds of intermediate reaction product powders with different components and place them in a planetary ball mill for high-energy ball milling. reaction product;

[0034] 2 Ball milling mixture: the intermediate reaction product obtained in step 1, TiN powder, Ni powder, Mo powder, Ti 2 AlN powder and AlN powder were used as raw materials, and 4 kinds of mixtures with different components were prepared according to Table 2, and placed in a planetary ball mill for ball milling and uniform mixing. The ball mill speed was 260 rpm, the ball-to-material ratio was 5:1, and the time was 36 hours;

[0035] 3. Add molding agent: the molding agent uses polyvinyl alcohol aqueous solution with a concentration of 7wt.%, and the addition ratio is 3wt% of the mixture;

[0036] 4 Compression molding: compression molding under 150MP...

Embodiment 2

[0043] 1. Preparation of intermediate reaction products: TiO 2 Powder, W powder and activated carbon powder are raw materials, according to Table 1, prepare 4 kinds of intermediate reaction product powders with different components and place them in a planetary ball mill for high-energy ball milling. reaction product;

[0044] 2 Ball milling mixture: the intermediate reaction product obtained in step 1, TiN powder, Ni powder, Mo powder, Ti 2 AlN powder and AlN powder were used as raw materials, and 4 kinds of mixtures with different components were prepared according to Table 2, and placed in a planetary ball mill for ball milling and uniform mixing. The ball mill speed was 400rpm, the ball-to-material ratio was 5:1, and the time was 24h;

[0045] 3. Add molding agent: the molding agent uses polyvinyl alcohol aqueous solution with a concentration of 7wt.%, and the addition ratio is 6wt% of the mixture;

[0046] 4 Compression molding: compression molding under 200MPa pressure...

Embodiment 3

[0053] 1. Preparation of intermediate reaction products: TiO 2 powder, W powder and activated carbon powder as raw materials, according to Table 1, prepare 4 kinds of intermediate reaction product powders with different components and place them in a planetary ball mill for high-energy ball milling. reaction product;

[0054] 2 Ball milling mixture: the intermediate reaction product obtained in step 1, TiN powder, Ni powder, Mo powder, Ti 2 AlN powder and AlN powder were used as raw materials, and 4 kinds of mixtures with different components were prepared according to Table 2, and placed in a planetary ball mill for ball milling and uniform mixing.

[0055] 3. Add molding agent: the molding agent uses polyvinyl alcohol aqueous solution with a concentration of 7wt.%, and the addition ratio is 4wt% of the mixture;

[0056] 4 Compression molding: compression molding under 250MPa pressure to obtain compact;

[0057] 5 Forming agent removal: place the compact in a vacuum / atmosp...

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Abstract

The invention discloses a preparation method of high-toughness non-magnetic Ti(C,N)-based metal ceramic. The preparation method includes the following steps that firstly, TiO2 powder, W powder and active carbon powder serve as raw materials for burdening, high-energy ball milling is adopted, and an intermediate reaction product is obtained; then the obtained intermediate reaction product, TiN powder, Ni powder, Mo powder, Ti2AlN powder and AlN powder serve as raw materials for preparation of a mixture, wherein the mixture is prepared from components by mass parts: 24.0-30.3 parts of Ti, 11.5-16.1 parts of O, 14.0-19.3 parts of C, 1.9-2.3 parts of N, 18-32 parts of Ni, 10.0-11.1 parts of Mo, 4.0-4.5 parts of W and 0.4-0.6 part of Al; and adding of a forming agent, press-forming, removing ofthe forming agent and sintering are carried out, and the high-toughness non-magnetic Ti(C,N)-based metal ceramic is obtained. The sintered metal ceramic is not magnetic at room temperature and has high toughness and excellent comprehensive performance, there is no special requirement on production equipment, the energy consumption is reduced, and industrial application and popularization are facilitated.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, and in particular relates to a preparation method of high-strength and toughness non-magnetic Ti(C,N)-based cermets. Background technique [0002] In modern industrial production, magnetic materials are widely used, and have gradually become one of the important materials in the fields of national defense, instrument manufacturing, and communication. For the production of magnetic materials, the use of mold forming or tool processing with good wear resistance and weak or non-magnetic properties can improve the surface quality and dimensional accuracy of magnetic workpieces, reduce resistance during the forming process, and improve production efficiency. [0003] Ti(C,N)-based cermets have high hardness, wear resistance, red hardness, strong chemical stability, low friction coefficient between metals, and good corrosion resistance, and have been widely used in the tool and mold industry....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/04C22C1/05C22C1/10
CPCC22C1/055C22C29/005C22C29/04
Inventor 郑勇徐翔宇周伟章国涛张家杰柯峥吴昊张梦迪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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