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High-entropy alloy binding phase tungsten carbide hard alloy for water knife and preparation method thereof

A high-entropy alloy and cemented carbide technology, applied in the field of cemented carbide, can solve problems such as application limitations, and achieve the effects of reducing production costs, good comprehensive mechanical properties, and lowering sintering temperature

Inactive Publication Date: 2020-04-07
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, its application in the field of water jet is limited

Method used

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  • High-entropy alloy binding phase tungsten carbide hard alloy for water knife and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0027] A method for preparing a high-entropy alloy binder phase tungsten carbide cemented carbide for water jets according to the present invention can be realized through the following steps:

[0028] 1) Weigh Al, Co, Cr, Cu, Fe and Ni powders with an average particle size of less than 50 μm in a molar ratio of 0.5:1:1:1:1:1, and mix them on a powder mixer for 6 hour, put the powder after mixing in the cemented carbide ball mill jar, put the cemented carbide grinding balls into the cemented carbide grinding ball according to the ball-to-material ratio of 10:1, and dry grind it under an argon atmosphere for 40 hours with the rotating speed of 300 rpm , and then wet milled with ethanol as a medium for 2 hours, dried and sieved to obtain high-entropy alloy powder.

[0029] 2) Weigh 0.7g of the high-entropy alloy powder of step 1) and 140g of WC powder with an average particle size of 0.4μm, and mix them on a powder mixer for 6 hours, and put the mixed powder into a cemented carb...

Embodiment 2

[0033] A method for preparing a high-entropy alloy binder phase tungsten carbide cemented carbide for water jets according to the present invention can be realized through the following steps:

[0034] 1) Weigh Al, Co, Cr, Cu, Fe and Ni powders with an average particle size of less than 50 μm in a molar ratio of 1:1:1:1:1:1, and mix them on a powder mixer for 6 hour, put the powder after mixing in the cemented carbide ball mill jar, put the cemented carbide grinding balls into the cemented carbide grinding ball according to the ball-to-material ratio of 10:1, and dry grind it under an argon atmosphere for 40 hours with the rotating speed of 300 rpm , and then wet milled with ethanol as a medium for 2 hours, dried and sieved to obtain high-entropy alloy powder.

[0035] 2) Weigh 0.7g of the high-entropy alloy powder of step 1) and 140g of WC powder with an average particle size of 0.4μm, and mix them on a powder mixer for 6 hours, and put the mixed powder into a cemented carbid...

Embodiment 3

[0038] A method for preparing a high-entropy alloy binder phase tungsten carbide cemented carbide for water jets according to the present invention can be realized through the following steps:

[0039] 1) Weigh Al, Co, Cr, Cu, Fe and Ni powders with an average particle size of less than 50 μm in a molar ratio of 1:1:1:1:1:1, and mix them on a powder mixer for 6 hour, put the powder after mixing in the cemented carbide ball mill jar, put the cemented carbide grinding balls into the cemented carbide grinding ball according to the ball-to-material ratio of 10:1, and dry grind it under an argon atmosphere for 40 hours with the rotating speed of 300 rpm , and then wet milled with ethanol as a medium for 2 hours, dried and sieved to obtain high-entropy alloy powder.

[0040] 2) Weigh 1.4g of the high-entropy alloy powder of step 1) and 140g of WC powder with an average particle size of 0.4μm, and mix them on a powder mixer for 6 hours, and put the mixed powder into a cemented carbid...

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Abstract

The invention belongs to the technical field of hard alloys, and discloses a high-entropy alloy binding phase tungsten carbide hard alloy for a water knife and a preparation method thereof. Accordingto the high-entropy alloy binding phase tungsten carbide hard alloy, a high-entropy alloy serves as a binding phase, and tungsten carbide serves as a hard phase. Components of the high-entropy alloy are at least five of Al, Co, Cr, Cu, Fe and Ni, the atomic percent of each element is 5-35%, and the mass percent of the high-entropy alloy in the high-entropy alloy binding phase tungsten carbide hardalloy is 0.2-1%. The method comprises the steps that high-entropy alloy powder and WC powder are mixed and then subjected to HPS hot pressing sintering forming, and the high-entropy alloy binding phase tungsten carbide hard alloy is obtained. The tungsten carbide hard alloy is fine in grain and good in comprehensive mechanical property.

Description

technical field [0001] The invention relates to the technical field of hard alloys, in particular to a high-entropy alloy binder phase tungsten carbide hard alloy for water jets and a preparation method thereof. Background technique [0002] The sand tube of the water jet is also called the nozzle or nozzle, which is the key to the formation of high-pressure water jet by the water jet. [0003] Because the sand tube is scoured by high-speed abrasive particles, the raw materials used to prepare water jets must have high hardness and high wear resistance. [0004] Tungsten carbide cemented carbide is often selected for the manufacture of waterjet sand pipes due to its high hardness, good wear resistance and fracture toughness. [0005] At present, cemented carbide is mainly prepared by powder metallurgy process from hard phase and binder phase. [0006] The most commonly used binder phase is still Co metal. However, Co metal is expensive and has magnetic properties and certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/08C22C1/05C22C1/10
CPCC22C1/051C22C29/067C22C29/08
Inventor 刘允中钱峰罗文艳
Owner SOUTH CHINA UNIV OF TECH