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A kind of al with nano-encapsulated solid lubricant 2 o 3 /ti(c,n) nanocomposite ceramic cutting tool material and preparation method thereof

A solid lubricant, ceramic tool technology, applied in the field of ceramic tool materials and their preparation, can solve the problems of reduced mechanical properties such as tool material hardness, damage to tool material mechanical properties, low friction coefficient of tool materials, etc. The effect of low cost and excellent performance

Active Publication Date: 2020-05-15
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the solid calcium fluoride material is directly added, the mechanical properties of the tool material will be seriously damaged. Therefore, seeking a reasonable design method to improve the performance of self-lubricating tools has become a current research hotspot, which is also an urgent need for self-lubricating tools. The problem
[0004] Chinese patent document CN1583660A provides a self-lubricating ceramic tool, which uses a solid lubricant directly added to the ceramic tool matrix, so that the tool material has a lower friction coefficient, but the mechanical properties such as the hardness of the tool material have been greatly reduced. Performance is not as expected
However, the addition of micron lubricating phase still affects the overall performance of the tool to a certain extent
Chinese patent document CN103011784A will nanometer solid lubricant CaF 2 Successfully introduced into the interior of ceramic matrix grains, improved the performance of self-lubricating ceramic tools, and obtained high-performance nano-composite alumina-based self-lubricating tool materials, but during the sintering process of tools, there is agglomeration and growth of nano-calcium fluoride. In large cases, and the nano-calcium fluoride existing in the grain boundary will affect the performance of the tool to a certain extent

Method used

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  • A kind of al with nano-encapsulated solid lubricant <sub>2</sub> o <sub>3</sub> /ti(c,n) nanocomposite ceramic cutting tool material and preparation method thereof
  • A kind of al with nano-encapsulated solid lubricant <sub>2</sub> o <sub>3</sub> /ti(c,n) nanocomposite ceramic cutting tool material and preparation method thereof
  • A kind of al with nano-encapsulated solid lubricant <sub>2</sub> o <sub>3</sub> /ti(c,n) nanocomposite ceramic cutting tool material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1: adding nano-CaF 2 @Al 2 o 3 Powdered Al 2 o 3 / Ti(C,N) Nanocomposite Ceramic Cutting Tool

[0049] Al 2 o 3 / Ti(C,N)-based ceramic cutter, the volume content ratio of raw materials is: Ti(C,N) is 22.16%, MgO is 0.5%, nano-CaF 2 @Al 2 o 3 Powder is 10%, the balance is Al 2 o 3 .

[0050] First, weigh the raw materials, add polyvinylpyrrolidone into absolute ethanol, ultrasonically disperse and mechanically stir for 20-30min, add nano-CaF 2 @Al 2 o 3 For the powder, continue ultrasonic dispersion and mechanical stirring for 60-120 minutes to obtain a dispersion. Add polyethylene glycol to absolute ethanol respectively, ultrasonically disperse and mechanically stir for 20-30min, add A1 2 o 3 For powder, continue to ultrasonically disperse and mechanically stir for 20-30 minutes to obtain A1 2 o 3 Dispersions. Add polyethylene glycol into absolute ethanol, ultrasonically disperse and mechanically stir for 20-30 minutes, and wait until it is ...

Embodiment 2

[0053] Embodiment 2: adding nano-CaF 2 @Al 2 o 3 Powdered Al 2 o 3 / Ti(C,N) Nanocomposite Ceramic Cutting Tool

[0054] Al 2 o 3 / Ti(C,N)-based ceramic cutter, the volume content ratio of raw materials is: Ti(C,N) is 23.4%, MgO is 0.5%, nano-CaF 2 @Al 2 o 3 Powder is 5%, the balance is Al 2 o 3 .

[0055] First, weigh the raw materials, add polyvinylpyrrolidone into absolute ethanol, ultrasonically disperse and mechanically stir for 20-30min, add nano-CaF 2 @Al 2 o 3 For the powder, continue ultrasonic dispersion and mechanical stirring for 60-120 minutes to obtain a dispersion. Add polyethylene glycol to absolute ethanol respectively, ultrasonically disperse and mechanically stir for 20-30min, add A1 2 o 3 For powder, continue to ultrasonically disperse and mechanically stir for 20-30 minutes to obtain A1 2 o 3 Dispersions. Add polyethylene glycol into absolute ethanol, ultrasonically disperse and mechanically stir for 20-30 minutes, and wait until it is co...

Embodiment 3

[0057] Embodiment 3: adding nano-CaF 2 @Al 2 o 3 Powdered Al 2 o 3 / Ti(C,N) Nanocomposite Ceramic Cutting Tool

[0058] Al 2 o 3 / Ti(C,N)-based ceramic cutter, the volume content ratio of raw materials is: Ti(C,N) is 20.92%, MgO is 0.5%, nano-CaF 2 @Al 2 o 3 Powder is 15%, the balance is Al 2 o 3 was 63.58%.

[0059] First, weigh the raw materials, add polyvinylpyrrolidone into absolute ethanol, ultrasonically disperse and mechanically stir for 20-30min, add nano-CaF 2 @Al 2 o 3 For the powder, continue ultrasonic dispersion and mechanical stirring for 60-120 minutes to obtain a dispersion. Add polyethylene glycol to absolute ethanol respectively, ultrasonically disperse and mechanically stir for 20-30min, add A1 2 o 3 For powder, continue to ultrasonically disperse and mechanically stir for 20-30 minutes to obtain A1 2 o 3Dispersions. Add polyethylene glycol into absolute ethanol, ultrasonically disperse and mechanically stir for 20-30 minutes, and wait unt...

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Abstract

The invention discloses an Al2O3 / Ti(C,N) nano-composite ceramic tool material with a nano coated solid lubricant and a preparation method of the ceramic tool material. The ceramic tool material is prepared from the following components in percentage by volume: 1%-30% of CaF2@Al2O3 nano powder, 0.1%-3% of MgO, 1%-55% of Ti(C,N), and the balance of Al2O3, wherein the average particle size of Ti(C,N)is 50-200nm, the average particle size of Al2O3 is 50-500nm, the average particle size of MgO is 0.1-5 micrometers, and the average particle size of CaF2@Al2O3 nano powder is 20-100nm. A ceramic toolmanufactured with the Al2O3 / Ti(C,N) nano-composite ceramic tool material has the characteristics of high hardness, high fracture toughness and high strength, and can effectively overcome the defect of poor mechanical property of a self-lubricating ceramic tool.

Description

technical field [0001] The present invention relates to a kind of ceramic cutter material and preparation method thereof, particularly to a kind of Al 2 o 3 / Ti(C,N) nano-based ceramic cutting tool material and its preparation method. [0002] technical background [0003] Because of its inherent high hardness and good stability, ceramic cutting tools play an important role in the field of cutting processing. The self-lubricating ceramic tool material has a low friction coefficient throughout the cutting life of the tool, especially in the field of high-speed dry cutting, the self-lubricating ceramic tool material has unique advantages. The unity of friction reduction and wear resistance of self-lubricating tools can be realized through reasonable design. Calcium fluoride is a solid lubricant that can be applied to self-lubricating tools, which can make the tool have a lower friction coefficient when it reaches a certain cutting temperature, and show a better lubrication e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/628C04B35/645
Inventor 陈照强郭润鑫许崇海衣明东季良刚
Owner QILU UNIV OF TECH
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