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Vanadium titanium carbide-based metal ceramic and preparation method thereof

A technology of vanadium-titanium carbide and base metal, applied in the field of cermets, can solve the problems of difficult control of the production process, difficult to accurately control the degree of vacuum, and increased production cost, and achieve the effects of high hardness, good toughness and low production cost

Active Publication Date: 2020-05-19
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first method makes it difficult to control the production process, and it is not easy to accurately control the vacuum degree, and the second method increases the production cost

Method used

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  • Vanadium titanium carbide-based metal ceramic and preparation method thereof
  • Vanadium titanium carbide-based metal ceramic and preparation method thereof
  • Vanadium titanium carbide-based metal ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Weigh 67.20g of (Ti,V)C powder, Mo 2 C powder 2.40g, WC powder 2.40g, Co powder 1.60g, Ni powder 6.40g, wherein the content of Ti in (Ti,V)C is 50.56g, and the content of V is 3.24g. The content of combined carbon is 13.69g (respectively with (Ti, V) C, Mo 2 C, WC combined carbon), the content of free carbon is 0.14g. Then put it into a ball mill tank with a ball-to-material ratio of 10:1 and a liquid-solid ratio of 4:1. After ball milling for 72 hours, pass through a screen with an aperture of 200 mesh to obtain a mixed wet material, and dry it in a vacuum oven at 75°C for 6 hours. After drying, pass through a sieve with a pore size of 80 mesh. Weigh 5.3g of the mixture, put it into the female mold of the forming mold, press it into a cold compact under a pressure of 20MPa, put it into a vacuum furnace for sintering, and the vacuum sintering process is as follows: vacuumize to less than 5Pa, slowly Heat up to 320°C for 1.5 hours, heat up to 600°C for 1 hour, continu...

Embodiment 2

[0054] Weigh 65.6g of (Ti,V)C powder, Mo 2 C powder 2.4g, WC powder 2.4g, Co powder 1.92g, Ni powder 7.68g, wherein the Ti content in (Ti, V)C is 49.28g, the V content is 3.24g, and the combined carbon content is 13.37g (respectively with (Ti,V)C, Mo 2 C, WC combined carbon), the content of free carbon is 0.13g. Then put it into a ball mill tank with a ball-to-material ratio of 10:1 and a liquid-solid ratio of 4:1. After ball milling for 72 hours, pass through a screen with an aperture of 200 mesh to obtain a mixed wet material, and dry it in a vacuum oven at 75°C for 6 hours. After drying, pass through a sieve with a pore size of 80 mesh. Weigh 5.3g of the mixture, put it into the female mold of the forming mold, press it into a cold compact under a pressure of 20MPa, put it into a vacuum furnace for sintering, and the vacuum sintering process is as follows: vacuumize to less than 5Pa, slowly Heat up to 320°C for 1.5 hours, heat up to 600°C for 1 hour, continue to heat up ...

Embodiment 3

[0056] Weigh 63.2g of TiC powder, Mo 2 C powder 2.4g, WC powder 2.4g, Co powder 2.4g, Ni powder 9.6g, wherein the Ti content in (Ti, V)C is 48.0g, the V content is 2.59g, and the combined carbon content is 12.89g (respectively with (Ti,V)C, Mo 2 C, WC combined carbon), the content of free carbon is 0.13g. Then put it into a ball mill tank with a ball-to-material ratio of 10:1 and a liquid-solid ratio of 4:1. After ball milling for 72 hours, pass through a screen with an aperture of 200 mesh to obtain a mixed wet material, and dry it in a vacuum oven at 75°C for 6 hours. After drying, pass through a sieve with a pore size of 80 mesh. Weigh 5.3g of the mixture, put it into the female mold of the forming mold, press it into a cold compact under a pressure of 20MPa, put it into a vacuum furnace for sintering, and the vacuum sintering process is as follows: vacuumize to less than 5Pa, slowly Heat up to 320°C for 1.5 hours, heat up to 600°C for 1 hour, continue to heat up to 1100...

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Abstract

The invention relates to vanadium titanium carbide-based metal ceramic and a preparation method thereof, and belongs to the technical field of metal ceramics. The vanadium titanium carbide-based metalceramic has a low bonding phase. The vanadium titanium carbide-based metal ceramic is prepared by pressing and molding the following components in percentage by weight: 10-15% of Co and Ni, greater than 0% but smaller than or equal to 3% of Mo2C, greater than 0% but smaller than or equal to 3% of WC, and the balance (Ti,V)C, and then carrying out vacuum sintering, specifically, the molar ratio ofCo to Ni is smaller than or equal to 1 / 4. The vanadium titanium carbide-based metal ceramic has uniform hardness, can keep good toughness, has high hardness, and provides a new way for research and development of nitrogen-free titanium-based cemented carbide with high hardness and low bonding phase.

Description

technical field [0001] The invention relates to vanadium carbide-titanium-based cermets and a preparation method thereof, belonging to the technical field of cermets. Background technique [0002] Cermets are structural materials composed of a ceramic hard phase and a metal or alloy binder phase. At present, the more popular cermets are (Ti,V)(C,N)-based, in which N plays a role in preventing grain growth. Infiltrate N 2 The addition of solid phase is to mix with (Ti,V)C in the form of TiN, Ti(C,N), V(C,N), etc. In the subsequent vacuum sintering process, TiN or Ti(C,N) Or V(C,N) and (Ti,V)C form (Ti,V)(C,N)-based cemented carbide. Because N will not dissolve into the binder phase, during vacuum sintering, N atoms will combine to form N 2 escape. N infiltrated in the gas phase is most likely to form N 2 N escape, added in the form of TiN, the escape of N is alleviated, and added in the form of Ti(C,N) or V(C,N), the escape of N is less, but no matter what When added i...

Claims

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Application Information

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IPC IPC(8): C22C29/10C22C1/05C22C1/10
CPCC22C1/051C22C29/067C22C29/10
Inventor 陈敏方民宪张雪峰马一川肖玄王淅茹谭斌
Owner PANZHIHUA UNIV
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