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Metal ceramic based on novel binder as well as preparation method and application thereof

A cermet and binder technology, used in metal processing equipment, transportation and packaging, etc., can solve the problems of high price and uneconomical cost, and achieve the effects of good thermal stability, good wear resistance and high strength

Inactive Publication Date: 2019-11-22
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the binders of existing Ti(C,N) cermet cutters are Co-Ni, and there are two problems: (1) Co-Ni is about 15-20% as the binder mass ratio, Co, Ni is more expensive, not cost-effective economically

Method used

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  • Metal ceramic based on novel binder as well as preparation method and application thereof
  • Metal ceramic based on novel binder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Put AlFeNiCoCr (the molar ratio of metal element is 1:1:1:1:1) in a high-energy ball mill into a WC-coated ball mill tank for 40 hours, and the ball-to-material ratio is 15:1 to prepare high-entropy alloy powder ;according to TiC 0.5 N 0.5 The mass ratio of , WC, AlFeNiCoCr, Mo and NbC is 55:15:15:10:5. Carry out powder preparation, ball milling time is 30h on the roller ball mill;

[0028] 2. After the dried powder is pressed and formed, it is sintered in a pressureless furnace at 1500° C. for 1.5 hours to prepare a cermet.

[0029] Performance test: the density of the obtained cermet is 99.1%, the bending strength is 2123Mpa, and the Vickers hardness is 1680HV. figure 1 It is the topography photo of the obtained cermet section of the present embodiment; from figure 1 It can be seen that no obvious pores exist, and dense cermets are prepared. figure 2 It is a topographical photo of the polished surface of the cermet obtained in this example. from figure 2 I...

Embodiment 2

[0031] 1. Put AlFeNiCoCr (the molar ratio of metal element is 1:1:1:1:1) in a high-energy ball mill into a WC-coated ball mill tank for 40 hours, and the ball-to-material ratio is 20:1 to prepare high-entropy alloy powder ;according to TiC 0.5 N 0.5 The mass ratio of , WC, AlFeNiCoCr, Mo and NbC is 57:15:13:10:5. Carry out powder preparation, ball milling time is 36h on the roller ball mill;

[0032] 2. After the dried powder is pressed and formed, it is sintered in a pressureless furnace at 1550° C. for 1.5 hours to prepare a cermet.

[0033] Performance test: the density of the obtained cermet is 99.4%, the bending strength is 2063Mpa, and the Vickers hardness is 1620HV.

Embodiment 3

[0035] 1. Put AlFeNiCoCr (the molar ratio of metal element is 1:1:1:1:1) in a high-energy ball mill into a WC-coated ball mill tank for 40 hours, and the ball-to-material ratio is 20:1 to prepare high-entropy alloy powder ;according to TiC 0.5 N 0.5 The mass ratio of , WC, AlFeNiCoCr, Mo and NbC is 57:15:13:10:5, the powder is prepared, and the ball milling time is 36h on a roller ball mill;

[0036] 2. After the dried powder is pressed into shape, it is sintered in a pressureless furnace at 1550° C. for 1 hour to prepare a cermet.

[0037] Performance test: the density of the obtained cermet is 99.6%, the bending strength is 2154Mpa, and the Vickers hardness is 1726HV.

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Abstract

The invention belongs to the technical field of cutting tools, and discloses a metal ceramic based on a novel binder as well as a preparation method and application thereof. The preparation method ofthe metal ceramic comprises the following steps of mixing TiC0.5N0.5, WC, AlFeNiCoCr, Mo and NbC, and then adding WC hard alloy balls and absolute ethyl alcohol for carrying out ball milling; and leaving the mixed slurry at 80 DEG C-100 DEG C for drying, and then carrying out compression molding on the dried powder, and finally heating the dried powder to 1500 DEG C-1550 DEG C for sintering. The AlFeNiCoCr binder adopted in the method is a high-entropy alloy, and due to the fact that Cr and Al of the AlFeNiCoCr binder can form an anti-oxidation layer on the surface of the metal ceramic, oxidation resistance of the metal ceramic can be improved. The metal ceramic has the advantages of high strength, good wear resistance, good thermal stability and the like.

Description

technical field [0001] The invention belongs to the technical field of cutting tools, and more specifically relates to a cermet based on a novel binder and its preparation method and application. Background technique [0002] Ti(C,N)-based cermets are widely used in cutting tools and molds due to their excellent properties such as high strength, high hardness, high temperature resistance, acid and alkali resistance, and wear resistance. During high-temperature cutting, cermet tools not only have excellent anti-adhesion and thermal stability, but also have better high-temperature red hardness, wear resistance and oxidation resistance than cemented carbide tools, and have self-lubricating properties. Compared with traditional cutting, high-speed cutting can obtain lower cutting temperature and higher processing efficiency, and has been widely used in the machinery manufacturing industry. However, high-speed machining puts forward higher requirements on the red hardness of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/05C22C29/08B22F1/00B22F3/02B22F3/10C22C1/10
CPCC22C1/051C22C29/08C22C29/067B22F3/02B22F3/10B22F1/10
Inventor 郭伟明宋邦超谭大旺林华泰
Owner GUANGDONG UNIV OF TECH