High-performance metal ceramic cutting tool and preparation method thereof

A cermet, high-performance technology, applied in metal processing equipment, transportation and packaging, etc., can solve the problems of insufficient impact toughness and hardness, and achieve the effect of high cutting rate, high surface finish, good toughness and hardness

Inactive Publication Date: 2019-07-12
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Ti(C,N)-based cermet knives have better high-temperature red hardness, wear resistance and oxidation resistance than traditional carbide knives, their fatal shortcomings are insufficient impact toughness and hardness.

Method used

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  • High-performance metal ceramic cutting tool and preparation method thereof
  • High-performance metal ceramic cutting tool and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A high-performance cermet cutter, which is prepared from the following components in parts by mass:

[0028] TiC 0.5 N 0.5 55%, WC 15%, Ni7%, Co 7%, Mo 2 C 12%, NbC 4%, C, N ratio is 0.5. C, N ratio is 0.5.

[0029] The preparation method of above-mentioned cermet cutter is as follows:

[0030] Mix the powder according to the above ratio, put the prepared powder into a nylon ball mill tank and pour an appropriate amount of absolute ethanol, and use a cemented carbide ball with a diameter of 10mm for planetary ball milling for 36 hours at a speed of 150r / min;

[0031] Put the mixed slurry into a drying oven with a temperature set at 350K, dry for 24 hours, add 8wt% polyvinyl alcohol solution with a concentration of 10% after drying for granulation, and put it into a mold for pressing after granulation. The pressing pressure is 250Mpa, put it into a vacuum furnace for degreasing, the highest sintering temperature is 1500°C, and the holding time is 1.5h.

Embodiment 2

[0033] A high-performance cermet cutter, which is prepared from the following components in parts by mass:

[0034] TiC 0.5 N 0.5 55%, WC 15%, Ni7%, Co 7%, Mo 2 C 12%, NbC 4%; of which TiC 0.5 N 0.5 The particle size is 100-150nm, and the ratio of C and N is 0.5.

[0035] The preparation method of above-mentioned cermet cutter is as follows:

[0036] Mix the powder according to the above ratio, put the prepared powder into a nylon ball mill tank and pour an appropriate amount of absolute ethanol, and use a cemented carbide ball with a diameter of 10mm for planetary ball milling for 36 hours at a speed of 150r / min;

[0037] Put the mixed slurry into a drying oven with a temperature set at 350K, dry for 12 hours, add 8wt% polyvinyl alcohol solution with a concentration of 10% after drying for granulation, and put it into a mold for pressing after granulation. The pressing pressure is 250Mpa, put it into a vacuum furnace for degreasing, the highest sintering temperature is...

Embodiment 3

[0039] A high-performance cermet cutter, which is prepared from the following components in parts by mass:

[0040] TiC 0.5 N 0.5 60%, WC 10%, Ni7%, Co 7%, Mo 2 C 12%, NbC 4%; of which TiC 0.5 N 0.5 The particle size is 100-150nm, and the ratio of C and N is 0.5.

[0041] The preparation method of above-mentioned cermet cutter is as follows:

[0042] Mix the powder according to the above ratio, put the prepared powder into a nylon ball mill tank and pour an appropriate amount of absolute ethanol, and use a cemented carbide ball with a diameter of 15mm for planetary ball milling for 48 hours at a speed of 180r / min;

[0043] Put the mixed slurry into a drying oven with a temperature set at 400K, dry for 16 hours, add 8wt% polyvinyl alcohol solution with a concentration of 10% after drying for granulation, and put it into a mold for pressing after granulation. The pressing pressure is 245Mpa, put it in a vacuum furnace for degreasing, the highest sintering temperature is 1...

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Abstract

The invention relates to a high-performance metal ceramic cutting tool and a preparation method thereof. The high-performance metal ceramic cutting tool is prepared from the following components in parts by mass: 55 to 65 percent of TiC0.5N0.5, 5 to 15 percent of WC, 6 to 9 percent of Ni, 5 to 8 percent of Co, 10 to 14 percent of Mo2C, and 3 to 6 percent of NbC, wherein the particle size of the TiC0.5N0.5 is 100 to 150nm, and the C-N ratio is 0.5. The method comprises the following steps of S1, putting the materials in a nylon ball-milling tank, adding ethyl alcohol, and adopting a sintered carbide ball for carrying out planetary ball milling; S2, drying a slurry mixed in the S1 in a drying box, adding a polyvinyl alcohol solution for pelletizing after drying, and then putting in a mold for pressing; and S3, degreasing a material obtained in the S2 in a vacuum furnace, wherein the sintering temperature is 1480 to 1500 DEG C, and the heat preservation time is 1.5 to 3h. The metal ceramic cutting tool provided by the invention has good toughness and hardness, and in the cutting process, the metal ceramic cutting tool not only has high wear resistance but also can bear a larger impactat the same time.

Description

technical field [0001] The invention relates to the technical field of cutting tools, in particular to a high-performance cermet tool and a preparation method thereof. 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, resistance and oxidation resistance than cemented carbide tools, and have self-lubricating properties. [0003] In Japan, the application of cermet knives accounts for more than 35% of all knives, and it also reaches more than 20% in Europe, America and other countries. In my country, cermet knives and ceramic knives mainly rely on imports, and the usage of cermet knives only accounts for 3% of the total amount o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C29/04C22C1/05B22F5/00
CPCC22C29/04C22C1/051B22F5/00B22F2005/001B22F2998/10B22F1/10B22F3/1021B22F3/02B22F2009/043
Inventor 郭伟明宋邦超谭大旺林华泰
Owner GUANGDONG UNIV OF TECH
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