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Rare earth alloy powder-modified Ti(C,N)-based metal ceramic and preparation method thereof

A technology for preparing rare earth alloys and ceramics, which is applied in the field of Ti-based cermets modified by rare earth alloy powders and its preparation, can solve the problems of unreasonable production and preparation, difficulties in industrial production, complicated process flow, etc., and achieve fine grain size , good wear resistance, uniform dispersion effect

Inactive Publication Date: 2012-07-04
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the process of this method is complicated and difficult to control, which makes the industrial production of related products difficult, and no reasonable plan has been proposed for the production and preparation of rare earth Ti(C,N)-based cermet dense bulk materials.

Method used

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  • Rare earth alloy powder-modified Ti(C,N)-based metal ceramic and preparation method thereof
  • Rare earth alloy powder-modified Ti(C,N)-based metal ceramic and preparation method thereof
  • Rare earth alloy powder-modified Ti(C,N)-based metal ceramic and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0028] The Ti(C,N)-based cermet raw material (powder) formula of this embodiment: Rare earth alloy powder modifier 0.6wt%, Ti(C,N) 53.4wt%, WC 20wt%, Mo 2 C 8wt%, TaC 5wt%, Ni 8wt%, Co 5wt%, the raw material components of the rare earth alloy powder modifier are: rare earth element Ce 27.32wt%, binder phase raw material Co 56.28wt%, Ni 16.4wt%. Put the above-mentioned raw material powder into a drum ball mill for wet grinding and dispersion. The speed of the ball mill is 30 rpm, and the grinding time is 72 hours. The grinding sphere is made of WC-8wt% Co cemented carbide balls with a diameter of φ10mm. The ratio of ball to material is 10:1, the wet grinding medium is absolute ethanol. The ground mixed slurry is sieved to take out the grinding sphere, and the mixed slurry is precipitated and separated and dried at 80° C. for 4 hours to obtain a mixed material. Polyethylene glycol is blended as a molding agent according to 1 wt% of the weight of the mixture, and the mixture is un...

Embodiment 2

[0032] The Ti(C,N)-based cermet raw material (powder) formula of this embodiment: Rare earth alloy powder modifier 1.0wt%, Ti(C,N) 40wt%, WC 26wt%, Mo 2 C 10wt%, TaC 8wt%, NbC 6wt%, Ni5wt%, Co 4wt%, the raw material components of the rare earth alloy powder modifier are: rare earth element Sm 16.87wt%, Dy1.2wt%, binder phase raw material Co36. 85wt%, Ni36.97wt%, Cu 6.19wt%, Al 1.92wt%. Put the above-mentioned raw material powder into a roller ball mill for wet grinding and dispersion. The speed of the ball mill is 20 rpm, and the grinding time is 82 hours. The grinding sphere adopts WC-8wt% Co cemented carbide balls with a diameter of φ10mm. The ball-to-material ratio is 8:1, the wet grinding medium is absolute ethanol. The ground mixed slurry is sieved to take out the grinding spheres, the mixed slurry is separated by precipitation and dried at 60° C. for 6 hours to obtain a mixed material. Paraffin wax is added as a molding agent according to 1.2 wt% of the weight of the mix...

Embodiment 3

[0034] The Ti(C,N)-based cermet raw material (powder) formula of this embodiment: Rare earth alloy powder modifier 0.4wt%, Ti(C,N) 63.6wt%, WC 8wt%, Mo 2 C 5wt%, TaC 5wt%, Ni9wt%, Co 4wt%, Fe 5wt%, the raw material components of the rare earth alloy powder modifier are: rare earth element Pr 16.95wt%, La10.2wt%, Yb 1.05wt%, viscosity Phase formation raw materials are Co 51.87wt%, Ni 14.65wt%, Fe 5.28wt%. Put the above-mentioned raw material powder into a roller ball mill for wet grinding and dispersion. The speed of the ball mill is 26r / min and the grinding time is 80 hours. The grinding sphere adopts WC-8wt% Co cemented carbide balls with a diameter of φ10mm, and the ball-to-material ratio is 15 :1, the wet grinding medium is methanol. The ground mixed slurry is sieved to take out the grinding sphere, and the mixed slurry is precipitated and separated and dried at 80° C. for 4 hours to obtain a mixed material. Polyethylene glycol is blended as a molding agent according to 1.4...

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Abstract

The invention discloses a rare earth alloy powder-modified Ti(C,N)-based metal ceramic and a preparation method of the metal ceramic. The metal ceramic comprises Co and Ni or at least two of components selected from Co, Ni as well as Fe as a bonding phase, Ti(C,N) as a basic hard phase and optionally at least one of metallic carbides; and a rare earth alloy powder modifier 0.1-3wt% of the total mass of the metal ceramic. The preparation method comprises treating a raw material through a wet-grinding and mixing process, a die-forming process, a vacuum-degreasing process and a low-pressure sintering process to prepare the rare earth alloy powder-modified Ti(C,N)-based metal ceramic. On the premise of keeping high hardness and high wear resistance, the Ti(C,N)-based metal ceramic prepared according to the invention has excellent comprehensive performance, can be greatly improved in strength and tenacity and can also be widely applied to various cutting tools and wear-resistant parts.

Description

Technical field [0001] The invention belongs to the technical field of cermet material preparation, and particularly relates to a Ti(C, N)-based cermet modified by rare earth alloy powder and a preparation method thereof. Background technique [0002] Ti(C, N)-based cermet has a series of performance advantages, such as high hardness and wear resistance, excellent chemical stability, red hardness and creep resistance, and extremely low friction coefficient. It has shown great potential as an alternative material for traditional WC-Co cemented carbide. However, in terms of performance, Ti(C, N)-based cermet still has the weakness of insufficient strength and toughness. This weakness not only affects its service life, but also limits its scope of use. Therefore, how to improve the strength and toughness of Ti(C, N)-based cermets has become a concern of material workers, and adding rare earth elements to it is an effective way. Adding a small amount of rare earth elements to Ti(C,...

Claims

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Application Information

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IPC IPC(8): C22C29/02C22C29/04C22C1/05
Inventor 叶金文刘颖朱刚
Owner SICHUAN UNIV
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