High-wearing-resistance tungsten alloy powder metallurgy material for precise instrument and preparation method of high-wearing-resistance tungsten alloy powder metallurgy material

A precision instrument and powder metallurgy technology, applied in the field of high wear-resistant tungsten alloy powder metallurgy materials and their preparation, can solve problems such as composition and formula optimization, and achieve the effects of promoting development, reducing production costs, and improving wear resistance.

Active Publication Date: 2018-09-07
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the paper failed to analyze the W, Ni, Fe and Al in

Method used

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  • High-wearing-resistance tungsten alloy powder metallurgy material for precise instrument and preparation method of high-wearing-resistance tungsten alloy powder metallurgy material
  • High-wearing-resistance tungsten alloy powder metallurgy material for precise instrument and preparation method of high-wearing-resistance tungsten alloy powder metallurgy material
  • High-wearing-resistance tungsten alloy powder metallurgy material for precise instrument and preparation method of high-wearing-resistance tungsten alloy powder metallurgy material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 500g of each raw material powder according to the proportion in Table 1.

[0033] Table 1 Raw material formula of tungsten alloy

[0034]

[0035] (1) Pour the powder weighed according to the above ratio into the V-shaped powder mixer, adjust the speed to 25r / min, mix for 10h, and then pour the uniformly mixed powder into the YG8 cemented carbide ball mill tank, and grind it. The ball material is YG8 cemented carbide, the ball milling speed is 100r / min, the ball milling time is 24h, and the ball-to-battery ratio is 5:1; finally, a 100 mesh metal sieve is used to screen the powder after ball milling to obtain uniform composition and no obvious Agglomerated composite tungsten alloy powder.

[0036] (2) Put the composite tungsten alloy powder into the soft sleeve and place it in a cold isostatic press for compression, with a compression pressure of 150 MPa and a pressure holding time of 5 min, to obtain a tungsten alloy green body. The tungsten alloy green body is placed ...

Embodiment 2

[0039] Weigh 500g of each raw material powder according to the proportion in Table 2.

[0040] Table 2 Raw material formula of tungsten alloy

[0041]

[0042] (1) Pour the powder weighed according to the above ratio into the V-shaped powder mixer, adjust the speed to 25r / min, mix the powder for 10h, and then pour the uniformly mixed powder into the YG8 cemented carbide ball mill tank. The material of the grinding ball is YG8 cemented carbide, the ball milling speed is 100r / min, the ball milling time is 24h, and the ball-to-battery ratio is 5:1. Finally, a 100 mesh metal sieve is used to screen the powder after ball milling to obtain uniform composition and no Obviously agglomerated composite tungsten alloy powder.

[0043] (2) Put the composite tungsten alloy powder into the soft sheath and place it in a cold isostatic press for compression, with a compression pressure of 250 MPa and a holding time of 15 min, to obtain a tungsten alloy green body. The tungsten alloy green body is ...

Embodiment 3

[0047] Weigh 500g of each raw material powder according to the ratio in Table 3.

[0048] Table 3 Raw material formula of tungsten alloy

[0049]

[0050] (1) Pour the powder weighed according to the above ratio into the V-shaped powder mixer, adjust the speed to 25r / min, mix the powder for 10 hours, and then pour the uniformly mixed powder into the YG8 cemented carbide ball mill tank. The material of the grinding ball is YG8 cemented carbide, the ball milling speed is 100r / min, the ball milling time is 24h, and the ball-to-battery ratio is 5:1. Finally, a 100 mesh metal sieve is used to screen the powder after ball milling to obtain uniform composition and no Obviously agglomerated composite tungsten alloy powder.

[0051] (2) Put the composite tungsten alloy powder into the soft sheath and place it in a cold isostatic press for compression, with a compression pressure of 200 MPa and a holding time of 10 min, to obtain a tungsten alloy green body. The tungsten alloy green body is ...

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Abstract

The invention belongs to the field of tungsten alloy materials and discloses a high-wearing-resistance tungsten alloy powder metallurgy material for precise instruments and a preparation method of thehigh-wearing-resistance tungsten alloy powder metallurgy material. A tungsten alloy comprises the following components in percentage by mass: 88.3-93.0% of tungsten, 6.0-7.0% of adhesive-phase nickeland iron, 0.1-0.3% of aluminum oxide, 0.08-2.1% of zirconium oxide and inevitable trace impurities. The preparation method comprises the following steps: uniformly mixing the components, performing low-energy ball milling, and performing isostatic cool pressing molding, sintering and quenching treatment, thereby obtaining a high-wearing-resistance tungsten alloy. The hardness of the tungsten alloy is greater than 430HV, and the yield strength of the tungsten alloy is greater than 1400MPa. Due to addition of a proper amount of 3mol.% Y2O3 and a part of stable ZrO2 and alpha-Al2O3 nanoparticles, tungsten crystal granules can be refined, the hardness and the wearing resistance of the tungsten alloy can be improved, and meanwhile due to ZrO2 phase-change toughening mechanisms, the toughness of the tungsten alloy can be improved, and the tungsten alloy is applicable to the field of precise instruments.

Description

Technical field [0001] The invention belongs to the field of tungsten alloy materials, and specifically relates to a highly wear-resistant tungsten alloy powder metallurgy material added with ceramic particles for precision instruments and a preparation method thereof. Background technique [0002] High-density tungsten alloy is a kind of alloy composed of tungsten as the matrix (85% to 99% tungsten content) and a small amount of Ni, Cu, Fe, Co, Mo and other elements. High-density tungsten alloy not only has high melting point, high strength, high hardness, but also has a small thermal expansion coefficient, good electrical and thermal conductivity, good plasticity, and certain processing properties. These excellent properties make it widely used in the civil industry, especially in the modern national defense and nuclear industries, such as flywheels in high-end watches, armor-piercing and armor-piercing bombs in the weapon industry, and gyroscope outer rotors of navigation inst...

Claims

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Application Information

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IPC IPC(8): C22C27/04C22C32/00C22C1/05C22C1/10B22F1/00B22F3/04B22F3/10B22F3/24
CPCB22F1/0003B22F3/04B22F3/1017B22F3/24B22F2003/248B22F2998/10C22C1/045C22C1/05C22C27/04C22C32/001
Inventor 李小强刘波黄冠翔屈盛官杨超
Owner SOUTH CHINA UNIV OF TECH
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