Hard alloy based on tungsten carbide and preparation method of hard alloy

A cemented carbide and tungsten carbide technology, applied in the field of cemented carbide, can solve the problems of increasing the drying process of high-entropy alloy powder, changing the composition ratio of high-entropy alloy powder, and increasing the probability that the composition of alloy powder is affected.

Active Publication Date: 2021-04-13
ZHUZHOU JINGGONG CEMENTED CARBIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Document CN109161774A discloses "hard tungsten carbide alloy with high-entropy alloy as binder and preparation method thereof". After the metal powder is mixed, put it into the stainless steel ball mill tank of the planetary high-energy ball mill for ball milling. This method will easily cause the material of the stainless steel tank wall to enter the target powder, changing the composition ratio of the high-entropy alloy powder; document CN109022990A discloses "a kind of "Preparation method of high-entropy alloy binder phase Ti(C,N)-based cermet", the high-entropy alloy

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The cemented carbide based on tungsten carbide in this embodiment includes a tungsten carbide hard phase and a high-entropy alloy binder phase, specifically including the following components by mass fraction: 90.38% tungsten carbide, 9.5% high-entropy alloy (comprising Co: 2.36%, Ni: 2.35%, Fe: 2.23%, Mn: 1.32%, Cr: 1.25%), 0.06% yttrium and 0.06% lanthanum.

[0030] The preparation method of the cemented carbide of the present embodiment may further comprise the steps:

[0031] (1) Weigh 180.76Kg tungsten carbide powder (WC powder) (Fischer particle size 2.0μm), 4.712Kg cobalt powder (near spherical, Fisher particle size is 0.8μm), 4.693Kg nickel powder, 4.465Kg iron powder, 2.636Kg Manganese powder, 2.494Kg chromium powder, 0.517KgY(NO 3 ) 3 ·6H 2 O, 0.374KgLa(NO 3 ) 3 ·6H 2 0. 60 liters of absolute ethanol and 1200Kg cemented carbide ball mill rods are added to the ball mill, mixed and wet milled for 30 hours;

[0032] (2) The mixture in step (1) is sieved an...

Embodiment 2

[0035] The cemented carbide based on tungsten carbide in this embodiment includes a tungsten carbide hard phase and a high-entropy alloy binder phase, specifically including the following components by mass fraction: 90.37% tungsten carbide, 9.5% high-entropy alloy (comprising Co: 2.36%, Ni: 2.35%, Fe: 2.23%, Mn: 1.32%, Cr: 1.25%), 0.05% yttrium and 0.08% lanthanum.

[0036] The preparation method of the cemented carbide of the present embodiment may further comprise the steps:

[0037] (1) Weigh 180.74Kg tungsten carbide powder (WC powder) (Fisher particle size 0.8μm), 4.712Kg cobalt powder (near spherical, Fisher particle size 0.8μm), 4.693Kg nickel powder, 4.465Kg iron powder, 2.636Kg Manganese powder, 2.494Kg chromium powder, 0.43KgY (NO 3 ) 3 ·6H2 O, 0.5KgLa(NO 3 ) 3 ·6H 2 0. 60 liters of absolute ethanol and 1200Kg cemented carbide ball mill rods are added to the ball mill, mixed and wet milled for 30 hours;

[0038] (2) The mixture in step (1) is sieved and dried,...

Embodiment 3

[0041] The cemented carbide based on tungsten carbide in this embodiment includes a tungsten carbide hard phase and a high-entropy alloy binder phase, specifically including the following components by mass fraction: 91.88% tungsten carbide, 8.0% high-entropy alloy (comprising Co: 1.984%, Ni: 1.976%, Fe: 1.880%, Mn: 1.110%, Cr: 1.050%), 0.06% yttrium and 0.06% lanthanum.

[0042] The preparation method of the cemented carbide of the present embodiment may further comprise the steps:

[0043] (1) Weigh 183.76Kg tungsten carbide powder (WC powder) (Fischer particle size 2.0μm), 3.968Kg cobalt powder (near spherical, Fisher particle size is 0.8μm), 3.952Kg nickel powder, 3.760Kg iron powder, 2.219Kg Manganese powder, 2.101Kg chromium powder, 0.517KgY (NO 3 ) 3 ·6H 2 O, 0.374KgLa(NO 3 ) 3 ·6H 2 0. 60 liters of absolute ethanol and 1200Kg cemented carbide ball mill rods are added to the ball mill, mixed and wet milled for 30 hours;

[0044] (2) The mixture in step (1) is sie...

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Abstract

The invention discloses a hard alloy based on tungsten carbide and a preparation method of the hard alloy. The hard alloy comprises a tungsten carbide hard phase and a binding phase, wherein the binding phase is a high-entropy alloy. The preparation method comprises the following steps of (1) weighing tungsten carbide powder in specific parts by mass and simple substance powder of each element in the high-entropy alloy; (2) mixing the tungsten carbide powder and the simple substance powder and then transferring into a ball mill to be subjected to ball milling, and obtaining a mixed material after drying; and (3) molding and sintering the mixed material to obtain the hard alloy based on tungsten carbide. According to the hard alloy, adverse effects of cobalt on health safety and environmental safety are reduced, the production cost of the hard alloy is reduced, and the bonding strength of the alloy is improved. According to the preparation method of the hard alloy, the process flow is reduced, the probability that the raw materials are polluted is reduced, and the preparation method has the advantages that the production cost of the hard alloy is reduced, and the quality of the hard alloy is improved.

Description

technical field [0001] The invention relates to the field of cemented carbide, in particular to a cemented carbide based on tungsten carbide and a preparation method thereof. Background technique [0002] Since cemented carbide was invented by Germans in the 1920s, WC-based cemented carbide with cobalt binder phase has been one of the most widely used cemented carbides in this field. Cemented carbide with nickel binder phase is also used. Iron is rarely used alone as a cemented carbide binder phase, and the amount of nickel and iron is far less than cobalt. [0003] Because cobalt is harmful to human health and the environment, and cobalt is expensive as a strategic resource, efforts to find cobalt substitutes have always been the goal pursued by people. Replacing cobalt or partially substituting cobalt will not have negative effects on the performance of cemented carbide. Influence is difficult. [0004] High-entropy alloys have excellent properties that some traditional ...

Claims

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Application Information

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IPC IPC(8): C22C29/08C22C1/05
CPCC22C29/08C22C29/067C22C1/051
Inventor 陈明杨金海
Owner ZHUZHOU JINGGONG CEMENTED CARBIDE
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