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Hardened high-toughness titanium carbonitride-based metal ceramic of island-shaped structure and preparation method thereof

A cermet and titanium carbonitride technology, applied in the field of cermet material preparation, can solve the problem that cermet cannot obtain high hardness and high toughness at the same time.

Active Publication Date: 2020-10-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the cermets in the prior art cannot obtain high hardness and high toughness at the same time, the purpose of the present invention is to propose an island-shaped hardened high-toughness titanium carbonitride-based cermet and its preparation method

Method used

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  • Hardened high-toughness titanium carbonitride-based metal ceramic of island-shaped structure and preparation method thereof
  • Hardened high-toughness titanium carbonitride-based metal ceramic of island-shaped structure and preparation method thereof
  • Hardened high-toughness titanium carbonitride-based metal ceramic of island-shaped structure and preparation method thereof

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Experimental program
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Embodiment 1

[0057] According to the design of the cermet material composition, the raw materials are prepared according to the mass percentage, high-binder phase particles: 54% titanium carbonitride, 15% tungsten carbide, 8% molybdenum carbide, 5% tantalum carbide, 9% cobalt, 9% nickel, Carbon black 0.4%; low binder phase particles: titanium carbonitride 62%, tungsten carbide 15%, molybdenum carbide 8%, tantalum carbide 5%, cobalt 4%, nickel 4%, carbon black 0.4%. The mixed powder of the two components was ball milled and mixed at a speed of 100r / min for 48 hours in a roller ball mill with a ball-to-material ratio of 6:1, and then 4wt% of paraffin was added to the resulting mixed powder as a molding agent, stirred evenly, and The two component powders were subjected to spray granulation, and by adjusting the spray parameters, the average particle size of the high-binding phase particles was 150 μm, and the average particle size of the low-binding phase particles was 80 μm. The two compone...

Embodiment 2

[0059] According to the design of the cermet material composition, the raw materials are prepared according to the mass percentage, high-binder phase particles: 48% titanium carbonitride, 15% tungsten carbide, 10% molybdenum carbide, 5% tantalum carbide, 9% cobalt, 9% nickel, Carbon black 0.3%; low binder phase particles: titanium carbonitride 55%, tungsten carbide 20%, molybdenum carbide 10%, tantalum carbide 5%, cobalt 5%, nickel 5%, carbon black 0.3%. The mixed powders of the two components were ball milled and mixed at a speed of 100 r / min for 48 hours in a roller ball mill with a ball-to-material ratio of 6:1, and then 3 wt % of paraffin was added to the resulting mixed powders as a molding agent, stirred evenly, and The two component powders were subjected to spray granulation, and by adjusting the spray parameters, the average particle size of the high-binding phase particles was 170 μm, and the average particle size of the low-binding phase particles was 70 μm. The two...

Embodiment 3

[0061] According to the design of the cermet material composition, the raw materials are prepared according to the mass percentage, high-binder phase particles: 54% titanium carbonitride, 14% tungsten carbide, 7% molybdenum carbide, 5% tantalum carbide, 10% cobalt, 10% nickel, Carbon black 0.5%; low binder phase particles: titanium carbonitride 58%, tungsten carbide 17%, molybdenum carbide 8%, tantalum carbide 5%, cobalt 6%, nickel 6%, carbon black 0.5%. The mixed powders of the two components were ball milled and mixed at a speed of 100 r / min for 48 hours in a roller ball mill with a ball-to-material ratio of 6:1, and then 3 wt % of paraffin was added to the resulting mixed powders as a molding agent, stirred evenly, and The two component powders were subjected to spray granulation, and by adjusting the spray parameters, the average particle size of the high-binding phase particles was 150 μm, and the average particle size of the low-binding phase particles was 70 μm. The two...

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Abstract

The invention discloses hardened high-toughness titanium carbonitride-based metal ceramic of an island-shaped structure and a preparation method thereof. The titanium nitride-based metal ceramic is prepared by sintering two components including low-binding-phase metal ceramic particles and high-binding-phase metal ceramic particles, wherein the two components include 10 to 50 percent by mass of the low-binding-phase metal ceramic particles and 50 to 90 percent by mass of the high-binding-phase metal ceramic particles. In the scheme provided by the invention, the low-binding-phase metal ceramicparticles as a hardening phase are sintered to form an island-shaped structure which is dispersed in a high-toughness metal ceramic matrix to harden the metal ceramic matrix. Meanwhile, as the two types of metal ceramic particles both contain a binding phase, but have a high-low concentration difference, the binding phase diffuses from a high binding phase area to a low binding phase area in thesintering process, and a good interface relationship is kept while the matrix is hardened, so that relatively high toughness is kept while the hardening purpose is achieved.

Description

technical field [0001] The invention belongs to the technical field of cermet material preparation, and relates to a high-hardness and high-toughness titanium carbonitride-based cermet, in particular to an island-shaped hardened high-toughness titanium carbonitride-based cermet and a preparation method thereof. Background technique [0002] Titanium carbonitride-based cermet is a new type of hard material, which is widely used due to its high strength and hardness, excellent thermal hardness, low coefficient of friction, excellent high temperature stability and outstanding wear resistance In the fields of cutting tools and wear-resistant structural parts. In the Japanese processing industry, the usage of cermet cutting tools has reached more than 35% of the total, and the usage in European and American countries is also as high as more than 20%. Knives expand to drills and other tools. Compared with traditional tool materials such as high-speed steel and cemented carbide, ...

Claims

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Application Information

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IPC IPC(8): C22C29/04C22C1/05
CPCC22C1/051C22C29/005C22C29/04
Inventor 康希越贺跃辉吝楠张鹛媚
Owner CENT SOUTH UNIV
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