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Titanium carbide-based solid solution metal ceramic and preparation method thereof

A cermet and solid solution technology, applied in the field of cermet materials and powder metallurgy, can solve the problems of high energy consumption, long preparation period, difficult control of oxygen content, etc., and achieve low energy consumption, easy control of oxygen content, and low oxygen content. Effect

Active Publication Date: 2014-03-05
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a titanium carbide-based solid solution cermet, and at the same time provides its preparation method, which solves the problems of long preparation period, high energy consumption and difficult control of oxygen content in the preparation of titanium carbide-based solid solution powder by the existing carbothermal reduction method

Method used

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  • Titanium carbide-based solid solution metal ceramic and preparation method thereof
  • Titanium carbide-based solid solution metal ceramic and preparation method thereof
  • Titanium carbide-based solid solution metal ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1, comprises the following steps successively:

[0022] (1) Put Ti powder, W powder, Ni powder and graphite powder into the ball mill tank, fill it with argon, and perform high-energy ball milling on a planetary ball mill to induce a self-propagating reaction to obtain (Ti, W)C-Ni composite Raw material powder, its X-ray diffraction pattern sees figure 1 The mass percent of each component is: Ti powder 54.61%, W powder 11.02%, Ni powder 20.00%, graphite powder 14.37%;

[0023] Ti powder has a particle size of 45 μm and a purity of 99%, W powder has a particle size of 3.80 μm and a purity of 99.9%, Ni powder has a particle size of 2.25 μm and a purity of 99.8%, graphite powder has a particle size of 5.5 μm and a purity of 99.9%;

[0024] When performing high-energy ball milling, the ball-to-material ratio is 25:1, the rotational speed is 350rpm, and the ball-milling time is 6h;

[0025] (2) The obtained (Ti, W)C-Ni composite raw material powder is mixed with...

Embodiment 2

[0028] Embodiment 2, comprises the following steps successively:

[0029] (1) Put Ti powder, W powder, Ni powder and graphite powder into the ball mill tank, fill it with argon, and perform high-energy ball milling on a planetary ball mill to induce a self-propagating reaction to obtain (Ti, W)C-Ni composite Raw material powder; the mass percent of each component is: Ti powder 40.60%, W powder 27.46%, Ni powder 20.00%, graphite powder 11.94%;

[0030] Ti powder has a particle size of 45 μm and a purity of 99%, W powder has a particle size of 3.80 μm and a purity of 99.9%, Ni powder has a particle size of 2.25 μm and a purity of 99.8%, graphite powder has a particle size of 5.5 μm and a purity of 99.9%;

[0031]When performing high-energy ball milling, the ball-to-material ratio is 30:1, the rotation speed is 400 rpm, and the ball milling time is 4 hours.

[0032] (2) The obtained (Ti, W)C-Ni composite raw material powder is mixed with 3wt% molding agent polyethylene glycol (P...

Embodiment 3

[0035] Embodiment 3, comprises the following steps successively:

[0036] (1) Put Ti powder, W powder, Ni powder and graphite powder into the ball mill tank, fill it with argon, and perform high-energy ball milling on a planetary ball mill to induce a self-propagating reaction to obtain (Ti, W)C-Ni composite Raw material powder; the mass percent of each component is: Ti powder 48.13%, W powder 20.50%, Ni powder 18.00%, graphite powder 13.37%;

[0037] Ti powder has a particle size of 45 μm and a purity of 99%, W powder has a particle size of 3.80 μm and a purity of 99.9%, Ni powder has a particle size of 2.25 μm and a purity of 99.8%, graphite powder has a particle size of 5.5 μm and a purity of 99.9%;

[0038] When performing high-energy ball milling, the ball-to-material ratio is 30:1, the rotational speed is 350 rpm, and the ball milling time is 5 hours.

[0039] (2) The obtained (Ti, W)C-Ni composite raw material powder is mixed with 2.5wt% molding agent polyethylene glyc...

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Abstract

The invention discloses titanium carbide-based solid solution metal ceramic and a preparation method thereof. The titanium carbide-based solid solution metal ceramic is composed of a hard phase (Ti, W) C solid solution and an adhesive phase Ni, wherein the composite material powder is prepared by mold pressing forming, degreasing and vacuum sintering; the composite material is synthesized by utilizing Ti powder, W powder, Ni powder and graphite powder as raw materials and performing a high-energy ball milling induced self-propagating reaction under argon protection, and the raw materials comprise the following ingredient by mass percent: 40.60-58.02% of Ti powder, 11.02-29.18% of W powder, 15.00-20.00% of Ni powder and 11.94-15.27% of graphite powder. The preparation of solid solution powder is simple in process, short in cycle, low in energy consumption and easy to control the oxygen content, the hardness of the prepared titanium carbide-based solid solution metal ceramic is 89.0-91.8HRA, the bending strength is not smaller than 1680MPa, and the fracture toughness KIC is not smaller than 12.5MPa.m1 / 2, so that the titanium carbide-based solid solution metal ceramic is suitable for serving as high-speed and high-efficiency cutting tools, hot extrusion molds and heat-resistant, corrosion-resistant and wear-resistant parts and components.

Description

technical field [0001] The invention belongs to the technical field of cermet materials and powder metallurgy, and in particular relates to a titanium carbide-based solid solution cermet and a preparation method thereof. Background technique [0002] TiC or Ti(C,N)-based cermet is a particle prepared by powder metallurgy process with TiC or Ti(C,N) as the main hard phase, Ni or Co or (Ni+Co) as the binder phase Reinforced composites. Compared with WC-Co cemented carbide, cermet has better high-temperature red hardness, wear resistance and oxidation resistance, and its friction coefficient with metal is lower. Ideal material for thermal wear and corrosion resistant components. In addition, Ti, the main raw material of cermets, is rich in reserves, and its production cost is only 35-55% of that of cemented carbide, so it has attracted the attention of material researchers. Although by joining Mo 2 C (or Mo), WC and other additives can significantly improve the wettability ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/10C22C1/05
Inventor 熊惟皓陈肖杨青青姚振华张国鹏陈珊陈亮
Owner HUAZHONG UNIV OF SCI & TECH
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