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A kind of titanium carbide cermet and preparation method thereof

A cermet and titanium carbide technology, which is applied in the field of titanium carbide cermet and its preparation, can solve the problems of limited material performance improvement and short sintering time, and achieve the effects of short sintering time, fast heating rate and improved mechanical properties

Active Publication Date: 2018-02-09
HAINAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sintering time of microwave sintering reaction is short, but it still belongs to pressureless sintering, and the improvement of material performance is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A TiC-30Fe cermet, the preparation method includes the following steps and process conditions:

[0027] (1) Prepare raw materials and weigh ingredients

[0028] According to the composition of the prepared titanium carbide cermet, the mass ratio of the raw materials is determined to be FeTiO3:TiO2:C=1.7:1:1, and the titanium concentrate, TiO2 and carbon black are weighed according to the ratio.

[0029] (2) Ball milling to mix and refine raw materials

[0030] Put the above-prepared raw materials into a stainless steel ball mill tank, and put the cemented carbide grinding balls into a ball-to-material ratio of 15:1. The raw materials are mechanically ball milled on a high-energy vibrating ball mill under an Ar atmosphere for 25 hours to obtain a uniformly mixed nanometer Crystal raw material fine powder.

[0031] (3) Rapid preparation of cermet

[0032] After the 25g of the above-mentioned uniformly mixed raw material fine powder is loaded into a Φ20 graphite mold, it is placed i...

Embodiment 2

[0035] A TiC-30Fe-10Mo2C cermet, the preparation method includes the following steps and process conditions:

[0036] (1) Prepare raw materials and weigh ingredients

[0037] According to the composition of the prepared titanium carbide cermet, determine the mass ratio of the raw materials as FeTiO3:TiO2:C:Mo2C=8.1:3.7:4.3:1, and weigh the titanium concentrate, TiO2, carbon black and Mo2C according to the ratio. .

[0038] (2) Ball milling to mix and refine raw materials

[0039] Put the above-prepared raw materials into a stainless steel ball mill tank, and put the cemented carbide grinding balls into a ball-to-material ratio of 15:1. The raw materials are mechanically ball milled on a high-energy vibrating ball mill under an Ar atmosphere for 25 hours to obtain a uniformly mixed nanometer Crystal raw material fine powder.

[0040] (3) Rapid preparation of cermet

[0041] After the 25g of the above-mentioned uniformly mixed raw material fine powder is loaded into a Φ20 graphite mold, ...

Embodiment 3

[0044] A TiC-25Fe-10Mo2C cermet, the preparation method includes the following steps and process conditions:

[0045] (1) Prepare raw materials and weigh ingredients

[0046] According to the composition of the prepared titanium carbide cermet, determine the raw material mass ratio as FeTiO3:TiO2:C:Mo2C=6.8:5.1:4.4:1, and weigh the titanium concentrate, TiO2, carbon black and Mo2C according to the ratio. .

[0047] (2) Ball milling to mix and refine raw materials

[0048] Put the above-mentioned prepared raw materials into a stainless steel ball milling tank, and put the cemented carbide grinding balls with a ball-to-material ratio of 25:1. The raw materials are mechanically ball milled on a high-energy vibrating ball mill under an Ar atmosphere for 20 hours to obtain a uniformly mixed nanometer Crystal raw material fine powder.

[0049] (3) Rapid preparation of cermet

[0050] After the 25g of the above-mentioned uniformly mixed raw material fine powder is loaded into a Φ20 graphite m...

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Abstract

The invention belongs to the technical field of titanium carbide cermet and its preparation, and proposes a novel titanium carbide cermet and a rapid in-situ reaction sintering method thereof. The composition mass percent of the novel titanium carbide cermet is: TiC 55-70%, Fe 25-35%, Mo2C 0-15%, VC 0-5%. The preparation method of the novel titanium carbide cermet includes technological steps such as preparing raw materials and weighing ingredients, mixing and refining raw materials by ball milling, and rapidly preparing the cermet. In the present invention, the titanium carbide powder and the binder phase iron are directly generated by in-situ carbothermal reduction reaction, which overcomes the easy oxidation of the binder phase iron caused by the separate synthesis of the powder and sintering in the conventional powder metallurgy method, and the easy oxidation of the binder phase iron at the interface between the two phases. Introduce defects such as impurities. The invention has many advantages such as short process flow, fast heating rate, low sintering temperature, short sintering time, hot pressing sintering, integration of powder generation and sintering, and the like.

Description

Technical field [0001] The invention belongs to the technical field of titanium carbide cermet and its preparation. More specifically, it is an iron-bonded titanium carbide cermet and a rapid in-situ reaction sintering method. Background technique [0002] Titanium carbide cermet is a metal matrix composite material composed of TiC as the hard phase, Ni, Co, etc. as the binding phase, and other additives. It has the advantages of high melting point, high hardness, chemical stability and good electrical conductivity. Therefore, it is the preferred material for cemented carbide, wear-resistant parts, cutting tools, electrodes, etc. However, Ni and Co are rare strategic metals and their market prices are relatively expensive. Therefore, it is very necessary to choose a cheap metal with better bonding properties to replace Ni and Co. [0003] Fe, Ni and Co belong to group ⅧA elements of the periodic table and have similar characteristics. Fe is rich in resources and cheap, so it is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/04C22C29/10
Inventor 向道平王钰午
Owner HAINAN UNIV
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