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Nano crystal dosed yttrium carbide alloy composite powder and preparation thereof

A technology of cemented carbide and composite powder, which is applied in the field of nanocrystalline yttrium-doped cemented carbide composite powder and its preparation, can solve the problems of large quality gap of cemented carbide, backward production technology level, and coarse grain diameter of alloy, etc. Increased flexural strength and hardness, fine grain size, and the effect of inhibiting grain growth

Inactive Publication Date: 2004-04-21
CHONGYI ZHANGYUAN TUNGSTEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the backwardness of production technology, compared with the level of developed countries, the quality of cemented carbide products in my country has a large gap, most of the products have low performance, short service life, and the average price is about 1-2 times lower, which is still low technology. Primary products with low content and low added value
The preparation of cemented carbide powder adopts the ordinary ball milling method. This method only plays the role of mixing materials. The grain size of the prepared powder is more than 1 μm. The particle diameter is relatively thick, generally greater than 2μm, the mechanical properties are low, the hardness is about 90HRA, and the bending strength is about 2500MPa

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method of nanocrystalline yttrium-doped cemented carbide composite powder is carried out according to the following steps:

[0028] 1. Make ingredients according to the following components and weight percentages: WC 77%, Co 10%, Y 2 o 3 1%, TiC+TaC+NbC 10%, VC 1%, Cr 3 C 2 1%; Among them, the average particle size (Fischer's) of WC and Co powder is 1.5μm and 1.0μm, Y 2 o 3 The average particle size (Fisher's) of the powder is 0.15 μm, and the percentage by weight of adding grinding dispersant and auxiliary agent is respectively 0.5% and 12% of the total amount of raw materials;

[0029] 2. Add the prepared fine powder into the high-energy ball mill tank, and add YG10 hard alloy grinding balls according to the ratio of (weight ratio) material: ball = 1:30, and the diameter of the grinding ball is φ3-φ30mm;

[0030] 3. Vacuum the ball mill tank to 10 -3 Pa, through argon protection, the argon pressure is 103Pa;

[0031] 4. After sealing the ball ta...

Embodiment 2

[0034] A preparation method of nanocrystalline yttrium-doped cemented carbide composite powder is carried out according to the following steps:

[0035] 1. Make ingredients according to the following components and weight percentages: WC 75%, Co 8%, Y 2 o 3 2.0%, (Ti, Ta)C 15%; among them, the average particle size (Fischer) of WC and Co powder is 3μm and 1.5μm, Y 2 o 3 The average particle size (Fisher's) of the powder is 0.7 μm, and the percentage by weight of adding grinding dispersant and auxiliary agent is respectively 1% and 15% of the total amount of raw materials;

[0036] 2. Add the prepared fine powder into the high-energy ball mill tank, and add YG10 hard alloy grinding balls according to the weight ratio of material: ball = 1:20, and the diameter of the grinding ball is φ3-φ30mm;

[0037] 3. Vacuum the ball mill tank to 10 -3 Pa, through argon protection, the argon pressure is 10 2 Pa;

[0038] 4. After sealing the ball tank filled with argon gas tightly, st...

Embodiment 3

[0041]A preparation method of nanocrystalline yttrium-doped cemented carbide composite powder is carried out according to the following steps:

[0042] 1. Make ingredients according to the following components and weight percentages: WC 90.5%, Co 9%, Y 2 o 3 0.5%, wherein, the average particle size (Fischer's) of WC and Co powder is 2μm and 0.9μm, Y 2 o 3 The average particle size (Fisher's) of the powder is 1.2 μm, and the weight of adding grinding dispersant and auxiliary agent is respectively 1.5% and 13% of the total amount of raw materials;

[0043] 2. Add the prepared fine powder into the high-energy ball mill tank, and add YG10 hard alloy grinding balls according to the weight ratio of material: ball = 1:20, and the diameter of the grinding ball is φ3-φ30mm;

[0044] 3. Vacuum the ball mill tank to 10 -2 Pa, through argon protection, the argon pressure is 10 2 Pa;

[0045] 4. After sealing the ball tank filled with argon gas tightly, start high-energy ball millin...

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Abstract

A nano-crystal Y-doped hard alloy powder is prepared from the particles of WC, Co, Y2O3, VC and Cr3C2 through proportional mixing, and ball grinding under protection of argon gas. Its advantages are simple preparing process, low cost and fine crystal grains (5-10nm). The hard alloy prepared from said nano-crystal powder features fine crystal grains and high hardness (1-3 HRA) and bending strength increased by 20-25%.

Description

[0001] The technical field [0002] The invention relates to a cemented carbide composite powder, in particular to a nanocrystalline yttrium-doped cemented carbide composite powder and a preparation method thereof. Background technique [0003] my country is a big producer of cemented carbide, but not a strong producer of cemented carbide. Tungsten is one of the important raw materials for the production of cemented carbide. my country is rich in tungsten ore and rare earth resources, and its ore reserves rank first in the world. It is of great significance to improve the industrial level of my country's cemented carbide production by making full use of the advantages of my country's mineral resources and developing high-quality, refined and sharp deep-processed cemented carbide products. Due to the backwardness of production technology, compared with the level of developed countries, the quality of cemented carbide products in m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/04C22C29/08
Inventor 刘沙黄泽兰刘刚杨贵彬
Owner CHONGYI ZHANGYUAN TUNGSTEN