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Metal-ceramic cutting tool material and its preparation method

A kind of metal ceramic, ceramic powder technology

Inactive Publication Date: 2003-04-16
ZHUZHOU HARD ALLOY GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Ti(C,N)-based cermets have been greatly developed at home and abroad in recent years, the main problems of the above-mentioned marketed products and patented technologies are still insufficient strength and toughness, and unstable product performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: Ti (C, N) and (Ti, W, Ta) (C, N) carbonitride ceramic powders with a particle size of 1.0 (Fsss, the same below) and in accordance with the set final composition weight percentage , (Ti, W, Ta) C, WC, TiC, ZrC, NbC and Mo2C carbide ceramic powder mixed with metal Ni, Co powder and wet ball milling for 48 to 96 hours, in Ti (C, N) powder N / ( N+C)=0.7 (weight ratio, the same below); N / (N+C)=0.37 in (Ti, W, Ta)(C, N) powder, Ti0.7, W0.2, Ta0.1( Weight percentage, the same below). Precipitate the prepared mixture for 36-96 hours, dry it in vacuum, add the molding agent styrene-butadiene-styrene inlay polymer, add 10% of the weight of the mixture, mix and dry, granulate and press Molding, then dewaxing treatment in a vacuum furnace, the vacuum degree is higher than 5Pa during processing, and keep at 300℃ for 120min, 520℃ for 120min, then vacuum sintering, the vacuum degree is higher than 0.1Pa, heat up to 1300℃ for heat preservation After 30 minutes, the temperature i...

Embodiment 2

[0016] Example 2: Ti (C, N) and (Ti, W, Ta, Nb) (C, N) carbonitride ceramic powder, (Ti, N) with a particle size of 1.5 and in accordance with the set weight percentage of the final composition W, Ta, Nb) C, WC, TiC, ZrC, TaC, and VC carbide ceramic powders are mixed with metal Ni, Co, Mo powders and wet milled in a high-energy ball mill for 20 hours, where Ti(C, N) powder contains N / (N+C)=0.65; N / (N+C)=0.3 in (Ti, W, Ta, Nb) (C, N) powder, Ti0.7, W0.1, Ta0.1, Nb0.1. The prepared mixture is directly vacuum dried without precipitation, and then the forming agent polyvinyl alcohol is added, and the weight is 8% of the weight of the mixture. After mixing, the mixture is dried, granulated, pressed into shape, and then dewaxed in a vacuum furnace. During the treatment, the vacuum degree is higher than 5 Pa, and the temperature is maintained at 350°C for 150 minutes and 600°C for 150 minutes; then vacuum sintering is carried out, and the vacuum degree is higher than 0.1 Pa. The tempera...

Embodiment 3

[0018] Example 3: Ti (C, N) and (Ti, W, Ta, Nb, Mo) (C, N) carbonitride ceramic powder with a particle size of 2.5 and in accordance with the set final composition weight percentage, ( Ti, Ta) C, WC, TiC, ZrC, Cr 3 C 2 And Mo 2C carbide ceramic powder and metal Ni, Co powder mixed wet ball milling for 72 hours, where Ti (C, N) powder N / (N+C) = 0.6 5; (Ti, W, Ta, Nb, Mo) (C , N) N / (N+C)=0.5 in the powder, Ti0.7, W0.1, Ta0.1, Nb0.05, Mo0.05. Precipitate the prepared mixture for 96 hours, dry it in vacuum, add the molding agent styrene-butadiene-styrene inlay polymer, add 15% of the weight of the mixture, mix, dry, granulate, and press to shape. Then perform dewaxing treatment in a vacuum furnace. During the treatment, the vacuum degree is higher than 5 Pa, and the temperature is kept at 250°C for 150 minutes and 550°C for 150 minutes; then vacuum sintering is carried out, the vacuum degree is higher than 0.1 Pa, and the temperature is raised to 1300°C for 30 minutes. , Then heat up ...

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Abstract

The invention discloses the Ti(C,N) based metal ceramics and its preparation method. The weight ratio of each constituent of the metal ceramics is as following Ti30-65, W8-25, Ta1.0-15.0, Zr0.1-5.0, Nb0-10, Cr0-1.0 etc as well as C and N as the rest. The powder of ceramics of carbonitride with Multiple elements in duplex type of two or more different element combinations is mixed with the powdersof carbide of Ti, W, Ta, Nb, V, Zr etc. and / or powders of carbide of their solid solution as well as the powders of Co, Ni, Mo. The metal ceramics are made from the admixture through the procedures of ball mill crushing, pressure moulding, vacuum dewaxing and vacuum sintering. With the good wear resistance being kept, the metal ceramics possesses high intensity and toughness.

Description

Technical field [0001] The invention relates to a ceramic material and a preparation method thereof, in particular to a Ti(C, N)-based cermet and a preparation method thereof. Background technique [0002] Ti (C, N)-based cermet is a new type of cermet material born in the 1970s. It has low density, good chemical stability and oxidation resistance, low friction coefficient to steel, and hardness and The red hardness is higher than the advantages of cemented carbide. Ti (C, N)-based cermets are used as tool materials, suitable for high-speed cutting and dry cutting of cast iron, ordinary steel, and high-hardness steel. Especially in terms of finishing and semi-finishing, the performance is better than that of cemented carbide and coating. Layered carbide cutting tools, so companies and research institutions in various countries have done a lot of work in the research of Ti(C,N)-based cermets in recent years, and products have been put on the market. Taking the Japanese market as a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C29/00
Inventor 徐智谋易新建郑家燊唐宏翚李祥辉江丙武彭德麟
Owner ZHUZHOU HARD ALLOY GRP CO LTD
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