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Titanium carbonitride-based cermet with metal-rich phase gradient structure and preparation method thereof

A gradient structure, titanium carbonitride technology, applied in the field of cermets, can solve problems such as low sintering efficiency, product structure deformation, gradient layer structure and low compositional continuity, achieve good strength and toughness, improve strength, carbon The effect of high content

Active Publication Date: 2021-12-28
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a titanium carbonitride-based cermet with a metal-rich phase gradient structure and a preparation method thereof. The process is simple, the sintering efficiency is higher, the gradient layer structure and composition continuity are high, and the obtained Cermets have no structural deformation and good mechanical properties, which effectively solve the problems of low sintering efficiency, gradient layer structure and compositional continuity, and product structural deformation.

Method used

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  • Titanium carbonitride-based cermet with metal-rich phase gradient structure and preparation method thereof
  • Titanium carbonitride-based cermet with metal-rich phase gradient structure and preparation method thereof
  • Titanium carbonitride-based cermet with metal-rich phase gradient structure and preparation method thereof

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Effect test

Embodiment 1

[0027]A titanium carbonitride-based cermet with a metal-rich phase gradient structure, comprising the following raw materials in weight percentage: 10% nickel, 10% cobalt, 5% molybdenum carbide and 10% tungsten carbide, and the balance is TiC 0.7 N 0.3 .

[0028] The preparation method of the above-mentioned titanium carbonitride-based cermet with gradient metal-rich phase structure comprises the following steps:

[0029] (1) Weigh nickel, cobalt, molybdenum carbide, tungsten carbide and TiC respectively 0.7 N 0.3 , to obtain mixed powder after mixing evenly;

[0030] (2) The mixed powder obtained in step (1) is ball milled at a speed of 60r / min for 48h, the ball milling medium is No. 120 solvent gasoline, the addition is 0.8mL / g, and the grinding ball is a tungsten carbide alloy ball with a diameter of 6mm containing 8wt% cobalt , the ball-to-material ratio is 5:1, and 5wt% paraffin wax is added to the mixed powder; after being filtered through a 200-mesh screen, vacuum-d...

Embodiment 2

[0033] A titanium carbonitride-based cermet with a metal-rich phase gradient structure, comprising the following raw materials in weight percentage: 15% nickel, 15% cobalt, 8% molybdenum carbide and 15% tungsten carbide, and the balance is TiC 0.7 N 0.3 .

[0034] The preparation method of the above-mentioned titanium carbonitride-based cermet with gradient metal-rich phase structure comprises the following steps:

[0035] (1) Weigh nickel, cobalt, molybdenum carbide, tungsten carbide and TiC respectively 0.7 N 0.3 , to obtain mixed powder after mixing evenly;

[0036] (2) The mixed powder obtained in step (1) is ball-milled at a speed of 90r / min for 60h, the ball-milling medium is No. 120 solvent gasoline, the addition is 1.2mL / g, and the grinding ball is a tungsten carbide alloy ball with a diameter of 7mm containing 8wt% cobalt , the ball-to-material ratio is 10:1, and 8wt% paraffin wax is added to the mixed powder; after being filtered through a 300-mesh screen, vacuum...

Embodiment 3

[0039] A titanium carbonitride-based cermet with a gradient metal-rich phase structure, comprising the following raw materials in weight percent: 20% nickel, 20% cobalt, 10% molybdenum carbide and 20% tungsten carbide, and the balance is TiC 0.7 N 0.3 .

[0040] The preparation method of the above-mentioned titanium carbonitride-based cermet with gradient metal-rich phase structure comprises the following steps:

[0041] (1) Weigh nickel, cobalt, molybdenum carbide, tungsten carbide and TiC respectively 0.7 N 0.3 , to obtain mixed powder after mixing evenly;

[0042] (2) The mixed powder obtained in step (1) is ball milled at a speed of 120r / min for 72h, the ball milling medium is No. 120 solvent gasoline, the addition is 1.5mL / g, and the grinding ball is a tungsten carbide alloy ball with a diameter of 8mm containing 8wt% cobalt , the ball-to-material ratio is 15:1, and 10wt% paraffin wax is added to the mixed powder; after being filtered through a 400-mesh screen, vacuum...

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Abstract

The invention provides a titanium carbonitride-based cermet with a gradient metal-rich phase structure and a preparation method thereof. The titanium carbonitride-based cermet with a gradient metal-rich phase structure comprises the following raw materials in weight percent: 10% to 20% nickel, 10% cobalt ~20%, molybdenum carbide 5~10% and tungsten carbide 10~20%, the balance is TiC 0.7 N 0.3 ; Wherein, the weight ratio of nickel and cobalt is 1:1-2, and the weight ratio of molybdenum carbide and tungsten carbide is 1:1-3. The present invention also provides a method for preparing titanium carbonitride-based cermets with a gradient metal-rich phase structure. The process of the present invention is simple, the sintering efficiency is higher, the gradient layer structure and component continuity are high, and the obtained cermets do not undergo structural deformation and have excellent mechanical properties. It is better, and effectively solves the problems of low sintering efficiency, low gradient layer structure and compositional continuity, and product structure deformation.

Description

technical field [0001] The invention belongs to the technical field of cermets, and in particular relates to a metal-rich phase gradient structure titanium carbonitride-based cermet and a preparation method thereof. Background technique [0002] Titanium carbonitride-based cermets are regarded as tungsten carbide-based hard alloys in the fields of cutting tools, molds, wear-resistant and corrosion-resistant parts, etc. because of their excellent properties such as high hardness and red hardness, low specific gravity, high wear resistance and corrosion resistance. One of the ideal alternative materials. For cermet materials, materials with higher binder phase content and lower hard ceramic phase content have low hardness and high toughness, and materials with high hard phase content and low binder phase content have high hardness and toughness. Difference. Therefore, in view of the limitations of the contradictory characteristics of uniform cermets, the further expansion of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/04C22C1/05C22C1/10
CPCC22C29/04C22C29/005C22C1/051
Inventor 万维财王杰王宗元樊坤阳李玉和
Owner XIHUA UNIV
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