Cutting tip of metal ceramic based on titanium carbonitride toughened by crystal whisker, and preparation method

A technology of titanium carbonitride and cutting blades, which is applied in the field of tool making materials, can solve the problems of inferior bending strength and impact toughness, low friction coefficient, etc., and achieve the effects of high strength, good wear resistance and high toughness

Inactive Publication Date: 2007-12-26
SECTION OF SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with traditional cemented carbide cutting inserts, this cermet cutting insert has the advantages of high red hardness, low friction coefficient, good wear resistance, and high corrosion resistance, but its bending strength and impact toughness are far inferior to traditional hard alloy cutting inserts. carbide cutting inserts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Weigh the weight of titanium carbonitride and SiC whisker respectively, and the weight ratio of titanium carbonitride and SiC whisker is 70:30; put SiC whisker into the mixture of polar solvent ethanol and dispersant, through mechanical Stirring and ultrasonic vibration are made into a suspension solution to ensure that the SiC whiskers are stably dispersed for later use; the percentage of weight [Ti (CN) and SiC whisker weight sum] added to titanium carbonitride is 17.8% Mo, 20 % Ni, 13% Co, 10.5% Ta, 43.5% TiC, 27% WC, 16% NbC, and mixed wet grinding for 80 hours; the wet ground mixture was then mixed with the dispersed The SiC whiskers are uniformly mixed, then pressed into shape, and vacuum sintered at a temperature of 1460 °C. The mechanical properties of the product are tested, and the results are as follows: the bending strength is 1600MPa, the fracture toughness is 13.8MPa.ml / 2, and the hardness is HAC94.5.

Embodiment 2

[0019] Weigh the weight of titanium carbonitride and SiC whisker respectively, the weight ratio of titanium carbonitride and SiC whisker is 65:35, put SiC whisker into the mixture of polar solvent ethylene propanol and dispersant, through Mechanical agitation and ultrasonic vibration are made into a suspension solution to ensure that the SiC whiskers are stably dispersed for later use; in titanium carbonitride, the percentage of weight [Ti (CN) and SiC whisker weight sum] is 19.5% Mo, 22% of Ni, 12.6% of Co, 10.8% of Ta, 42% of TiC, 27% of WC, 17% of NbC, and mixed wet grinding for 90 hours; the mixture after wet grinding was mixed with The dispersed SiC whiskers are uniformly mixed, then pressed into shape, and vacuum sintered at a temperature of 1510°C. The mechanical properties of the product are tested, and the results are as follows: the bending strength is 1620MPa, the fracture toughness is 14.2MPa.ml / 2, and the hardness is HAC94.2.

Embodiment 3

[0021] Weigh the weight of titanium carbonitride and SiC whisker respectively, the weight ratio of titanium carbonitride and SiC whisker is 76:24, put the SiC whisker into the mixture of water and dispersant, through mechanical stirring and ultrasonic wave Oscillate to make a suspension solution to ensure that the SiC whiskers are stably dispersed and ready for use; add the weight [Ti(CN) and SiC whisker weight sum] to titanium carbonitride, the percentage is 17% Mo, 20% Ni , 13% Co, 11.6% Ta, 40.2% TiC, 25% WC, 19% NbC, and mixed wet milling for 90 hours; the wet milled mixture was mixed with the dispersed SiC crystal It must be uniformly mixed, then pressed into shape, and vacuum sintered at a temperature of 1570°C. The mechanical properties of the product are tested, and the results are as follows: the bending strength is 1590MPa, the fracture toughness is 13.2MPa.lm / 2, and the hardness is HAC93.5.

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Abstract

This invention relates to a method for preparing SiC whiskers toughened Ti(CN)-based metal ceramic tool blade. The tool blade is composed of Ti (CN) as the major phase, SiC whiskers as the toughening agent, and metal binding phase and carbide hard phase as the additives. The method comprises: mixing the above components, molding, and sintering in vacuum to obtain a high compactness. Compared with traditional TN metal ceramic tool blade, the SiC whiskers toughened Ti(CN)-based metal ceramic tool blade has such advantages as high strength, high toughness, high wear resistance, high heat resistance, and high cuttability, and can be used for high speed milling, finish turning or semi-finish turning of carbon steel, stainless steel, hardened steel, wear-resistant cast iron and high-strength steel.

Description

technical field [0001] The invention relates to a material for making tools, in particular to a class of whisker-toughened composite titanium carbonitride [Ti(CN)]-based cermet cutting tool materials. The present invention also relates to a manufacturing method of the above-mentioned material. Background technique [0002] People are accustomed to directly refer to TiC / Ti(CN)-based cermet composites as cermets, and traditional WC-Co cemented carbide composites as cemented carbide. At present, most of the cermet cutting inserts produced in large quantities are made of titanium carbonitride [Ti(CN)] as the main phase, with metal binder phase and carbide hard phase as additives, which are prepared by high temperature sintering after mixed molding of. Compared with traditional cemented carbide cutting inserts, this cermet cutting insert has the advantages of high red hardness, low friction coefficient, good wear resistance, and high corrosion resistance, but its bending streng...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/58C04B35/56C04B35/563C04B35/81C04B35/63C04B35/64C04B35/622
Inventor 丁燕鸿
Owner SECTION OF SCI & TECH DEV
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