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Directionally grown titanium carbonitride crystal, preparation method and application thereof

A technology of titanium carbonitride and directional growth, which is applied in chemical instruments and methods, crystal growth, single crystal growth, etc., can solve the problem of low temperature strength of cermets, cannot be used for a long time, and cannot fundamentally improve the collapse resistance of cermets Loss of performance and other issues, to achieve the effect of low cost and strong feasibility

Active Publication Date: 2021-07-23
JIAXING Z-SHARP ADVANCED MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because different from the pure ceramic structure, there is a large concentration gradient inside the cermet, simply reducing the particle size of the hard ceramic phase, and the exponentially increasing surface area of ​​the hard phase requires a larger volume fraction of the metal phase to form a binder phase to provide sintering. When the liquid phase sintering and the toughness of the sintered body are improved, the higher volume fraction of the binder phase leads to a serious decrease in the high temperature strength of the cermet, and the adjustment of the metal phase composition ratio cannot fundamentally improve the fracture resistance of the cermet
[0004] At present, although tungsten-cobalt cemented carbide has been widely used as a material for cutting work, it has the disadvantage of being unable to be used for a long time because it is prone to electrochemical corrosion to form a primary battery. , wear-resistant and chemically stable titanium carbonitride-based cermets have far-reaching significance in rough machining or mining tool manufacturing

Method used

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  • Directionally grown titanium carbonitride crystal, preparation method and application thereof
  • Directionally grown titanium carbonitride crystal, preparation method and application thereof
  • Directionally grown titanium carbonitride crystal, preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0039]Weigh 3.9 parts of titanium powder, 1 part of carbon black powder and 0.5 part of urea in a dry method and mix them for 20 hours, then evenly put them into a vessel, send them to a high-temperature furnace for calcination under an argon atmosphere with a flow rate of 100 NL / min, and calcine at 800 °C for 0.5 h, take it out and cool it; then use the mixed gas atmosphere of methane and nitrogen with a volume ratio of 1:2 to carry out high-temperature furnace calcination again, and calcine it at 1000 ° C for 2 hours, take it out, cool it and classify it to get oriented growth titanium carbonitride Crystal, its scanning electron microscope picture is shown in figure 1 .

[0040] The titanium carbonitride crystal obtained in this example has a length of about 0.5 μm, an aspect ratio of about 1:1, a carbon content of 9.5%, and a nitrogen content of 11.2%.

Embodiment 2

[0042] Weigh 4.1 parts of titanium sponge powder, 0.5 parts of graphite powder and 2 parts of glycine dry-mixed for 40 hours, then evenly put them into a vessel, send them to a high-temperature furnace for calcination under a helium atmosphere with a flow rate of 25NL / min, and calcine at 1300°C for 2 hours , take it out and cool it; then use the mixed gas atmosphere of acetylene and ammonia with a volume ratio of 2:1 to carry out high-temperature furnace calcination again, and calcine it at 1800°C for 0.5h, take it out, cool it and classify it to get the directional growth carbonitride Titanium crystal, its scanning electron microscope picture is shown in figure 2 .

[0043] The titanium carbonitride crystal obtained in this example has a length of about 80 μm, an aspect ratio of about 3:1, a carbon content of 13.7%, and a nitrogen content of 8.1%.

Embodiment 3

[0045] Weigh 4 parts of titanium hydride powder, 0.8 parts of graphite powder and 1 part of amide by dry method and mix them for 30 hours, put them into a container evenly, send them to a high-temperature furnace for calcination under a neon gas atmosphere with a flow rate of 50NL / min, and calcine at 1000°C for 1 hour , take it out and cool it; then use the mixed gas atmosphere of acetylene and nitrogen with a volume ratio of 2:1 to carry out high-temperature furnace calcination again, and calcine it at 1500 ° C for 1 hour, take it out, cool it and classify it to get the oriented growth titanium carbonitride crystal , its scanning electron microscope image is shown in image 3 .

[0046] The titanium carbonitride crystal obtained in this example has a length of about 5 μm, an aspect ratio of about 6:1, a carbon content of 6.6%, and a nitrogen content of 13.9%.

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Abstract

The invention discloses a directionally grown titanium carbonitride crystal as well as a preparation method and an application thereof, and belongs to the technical field of metal ceramic composite material raw material manufacturing. The preparation method of the titanium carbonitride crystal comprises the following steps: weighing a titanium source, a nitrogen source and a carbon source, uniformly mixing, calcining in a protective gas atmosphere, taking out and cooling, then carrying out high-temperature calcination again, taking out and cooling to obtain the directionally grown titanium carbonitride crystal. The titanium carbonitride crystal prepared by the method has extremely high collapse damage resistance and hardness due to directional arrangement of the crystal, is compact in structure, and can be used in sintered bodies of cutting tools and wear-resistant parts and coating materials.

Description

technical field [0001] The invention relates to a directional growth titanium carbonitride crystal, a preparation method and an application thereof, and belongs to the technical field of raw material manufacturing of cermet composite materials. Background technique [0002] Titanium carbonitride-based cermets, as a type of titanium-based cemented carbide, are used in the manufacture of cutting materials because they have higher red hardness, better oxidation resistance and stronger wear resistance than tungsten-cobalt cemented carbide. The sintered body of tools and wear-resistant parts, and because of its excellent surface processing quality, is often used in semi-finishing and finishing. Although titanium carbonitride-based cermet materials have been developed considerably, cermet materials are not currently widely used for roughing or mining tools with interrupted cutting characteristics. The reason is that cermet materials, as cutting tools, are still not comparable to ...

Claims

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Application Information

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IPC IPC(8): C30B1/10C30B29/38C30B29/60C22C29/04
CPCC30B1/10C30B29/38C30B29/60C22C29/04Y02E60/36
Inventor 王博张斌王诗阳
Owner JIAXING Z-SHARP ADVANCED MATERIALS TECH CO LTD
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