High performance alumina composite ceramic cutting tool material and preparation method thereof

A technology of composite ceramics and cutting tool materials, which is applied in the field of new materials, can solve problems such as the limitation of mechanical properties of materials, and achieve the effect of improving comprehensive mechanical properties

Inactive Publication Date: 2018-12-07
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defect that the single addition of particles is limited to the improvement of the mechanical properties

Method used

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  • High performance alumina composite ceramic cutting tool material and preparation method thereof
  • High performance alumina composite ceramic cutting tool material and preparation method thereof
  • High performance alumina composite ceramic cutting tool material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Carry out batching according to mass percentage, take by embodiment parameter attached table: the total amount of aluminum oxide powder is 65~55%; The total amount of titanium carbonitride powder is 20%, and the total amount of tungsten carbide titanium powder is 15~25%; The aluminum oxide powder, titanium carbonitride powder, and tungsten carbide titanium powder are poured into the mixing tank in proportion, and absolute ethanol is added as the medium, and ball milled on a ball mill for 48 hours to make the materials of each phase mix more evenly, and then vacuum dried , and sieve to obtain a well-dispersed composite ceramic material powder, which is packaged for later use. Put the mixed composite ceramic material powder into a graphite mold, and use a uniformly pressurized hot-press sintering process in a vacuum environment; start heating from room temperature to 1650°C, and the heating rate is 50°C / min, and the pressure is pre-increased to 4Mpa; the subsequent pressu...

Embodiment 2

[0047] 1) Using absolute ethanol as the medium, separate ball milling of alumina, titanium carbonitride and tungsten carbide titanium raw material powders, the ball milling process is carried out on a cylinder ball mill, wherein the alumina powder is ball milled for 65 hours to break up a larger The agglomerated particles were obtained to obtain a more uniform powder with a particle size of 0.5 μm; titanium carbonitride powder was ball milled for 65 hours to break up larger agglomerated particles to obtain a more uniform powder with a particle size of 0.5 μm; titanium tungsten carbide powder Ball milling for 230 hours to reduce the particle size of the powder to 0.5 μm, and then vacuum-dried, sieved, and packaged for later use;

[0048] 2) Pour 50 parts by weight of alumina powder with a particle size of 0.5 μm, 15 parts by weight of titanium carbonitride powder with a particle size of 0.5 μm, and 15 parts by weight of tungsten carbide titanium powder with a particle size of 0....

Embodiment 3

[0052] 1) Using absolute ethanol as the medium, separate ball milling of alumina, titanium carbonitride and tungsten carbide titanium raw material powders, the ball milling process is carried out on a cylinder ball mill, wherein the alumina powder is ball milled for 65-79 hours to break up Larger agglomerated particles to obtain a more uniform powder with a particle size of 1.0 μm; titanium carbonitride powder ball milled for 72 hours to break up larger agglomerated particles to obtain a more uniform powder with a particle size of 1.0 μm; tungsten carbide Titanium powder was ball milled for 240 hours to reduce the powder particle size to 1.0 μm, after which it was vacuum dried, sieved, and packaged for later use;

[0053] 2) Pour 60 parts by weight of alumina powder with a particle size of 1.0 μm, 20 parts by weight of titanium carbonitride powder with a particle size of 1.0 μm, and 20 parts by weight of tungsten carbide titanium powder with a particle size of 1.0 μm into a mix...

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Abstract

The invention relates to a high performance alumina composite ceramic cutting tool material and a preparation method thereof. The preparation method includes the following steps: 1) preparing raw materials; 2) pouring 50-70 parts by weight of alumina powder with particle sizes being 0.5-1.5 [mu]m, 15-25 parts by weight of titanium carbonitride powder with particle sizes being 0.5-1.5 [mu]m and 15-25 parts by weight of titanium tungsten carbide powder with particle sizes being 0.5-1.5 [mu]m into a mixing bucket, adding absolute ethanol as a medium, performing ball milling on a ball mill for 43-53 h so that the mixing of all phase materials can be more uniform, obtaining composite ceramic material powder with good dispersion through vacuum drying and sieving, and packaging for later use; and3) performing charging and sintering. The defects of the limitation of single particle addition on enhancing the mechanical properties of materials can be overcome, and the comprehensive mechanical properties of ceramic cutting tool materials can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to an alumina high-performance composite ceramic tool material and a preparation method thereof. Background technique [0002] Ceramic tool materials have high hardness, wear resistance and good high-temperature mechanical properties. They have low affinity with metals, low coefficient of friction, and good chemical stability. They are not easy to bond with metals during cutting. Therefore, ceramic tools have many advantages such as being able to process superhard materials that are difficult or impossible to process with traditional tools. However, the inherent brittleness of ceramic knives limits its practical application. Therefore, how to effectively improve its brittleness and improve its reliability in practical applications while maintaining the advantages of super strength and high hardness has become the research and development of ceramic knives materials. key issue...

Claims

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Application Information

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IPC IPC(8): C04B35/10
CPCC04B35/10C04B2235/3843C04B2235/3847C04B2235/3856C04B2235/6562C04B2235/6567C04B2235/66C04B2235/96
Inventor 于金伟黄传真刘含莲邹斌朱洪涛
Owner SHANDONG UNIV
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