Ceramic cutter material and preparation method thereof

A technology of ceramic knives and raw materials, applied in the field of ceramic knives materials and their preparation, can solve the problems of low strength and toughness, and achieve the effects of strong crushing resistance, bending strength and fracture toughness

Inactive Publication Date: 2012-09-05
成都鑫三洋科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent brittleness of the ceramic tool material itself, its strength and toughness are low, which limits its further expanded application to a certain extent.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Choose a diameter of 0.8μm Al 2 o 3 Powder, WC powder with a diameter of 1.5 μm, and TiC powder with a diameter of 1.5 μm are used as raw material mixing ingredients, and 0.4% by weight of yttrium-containing rare earth additive is added to the mixed raw material; with absolute ethanol as the medium, the mixture added with the rare earth additive is passed through Wet ball milling for 100 hours to obtain a slurry; the slurry is vacuum-dried and sieved in a nitrogen flow to obtain a powder; then the powder is hot-pressed and sintered.

[0020] The flexural strength and fracture toughness were measured by 3-point bending method and indentation method respectively, and the hardness of the material was measured by Rockwell hardness tester Hv-120. The mechanical properties were measured as follows: the flexural strength and fracture toughness were as high as 853MPa and 6.03MPam 1 / 2 , the material hardness is 19.1GPa.

[0021] The cutting test was carried out on a CA6140 ma...

Embodiment 2

[0023] Choose a diameter of 0.9μm Al 2 o 3 Powder, WC powder with a diameter of 1.4 μm, and TiC powder with a diameter of 1.5 μm are used as raw material mixing ingredients, and 0.6% by weight of yttrium-containing rare earth additive is added to the mixed raw material; with absolute ethanol as the medium, the mixture added with the rare earth additive is passed through Wet ball milling for 100 hours to obtain a slurry; the slurry is vacuum-dried and sieved in a nitrogen flow to obtain a powder; then the powder is hot-pressed and sintered.

[0024] The flexural strength and fracture toughness were measured by 3-point bending method and indentation method, and the hardness of the material was measured by Rockwell hardness tester Hv-120. The mechanical properties were measured as follows: the flexural strength and fracture toughness were as high as 850MPa and 6.04MPam 1 / 2 , the material hardness is 19.2GPa.

[0025] The cutting test was carried out on a CA6140 machine tool, a...

Embodiment 3

[0027] Choose a diameter of 0.9μm Al 2 o 3 Powder, WC powder with a diameter of 1.6 μm, and TiC powder with a diameter of 1.7 μm are used as raw material mixing ingredients, and 1.0% by weight of yttrium-containing rare earth additive is added to the mixed raw material; with absolute ethanol as the medium, the mixture added with the rare earth additive is passed through Wet ball milling for 100 hours to obtain a slurry; the slurry is vacuum-dried and sieved in a nitrogen flow to obtain a powder; then the powder is hot-pressed and sintered.

[0028] The flexural strength and fracture toughness were measured by 3-point bending method and indentation method respectively, and the hardness of the material was measured by Rockwell hardness tester Hv-120, and its mechanical properties were measured as follows: the flexural strength and fracture toughness were respectively as high as 851MPa and 6.05MPam 1 / 2 , the material hardness is 19.1GPa.

[0029] The cutting test was carried o...

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Abstract

The invention discloses a novel ceramic cutter material and a preparation method thereof. The ceramic cutter material contains Al2O3, WC, TiC and a rare-earth additive. The preparation method of the ceramic cutter material comprises the following steps of: step 1, mixing Al2O3 powder, WC powder and TiC powder to obtain a raw material mixture; step 2, adding a rare-earth additive in the raw material mixture; step 3, by taking absolute ethyl alcohol as a medium, and carrying out wet ball-milling on the raw material mixture with the rare-earth additive for 100 hours to obtain a slurry; step 4, drying the slurry in vacuum and sieving in a nitrogen flow to obtain a powder; and step 5, carrying out hot-pressing formation on the powder. The ceramic cutter prepared by the ceramic cutter material has the obvious advantages of high bending strength, large fracture toughness, high hardness, good wear resistance and the like. The method is simple in process, high in production efficiency and suitable for large-scale production.

Description

technical field [0001] The invention relates to the technical field of ceramic cutting tools, in particular to a ceramic cutting tool material and a preparation method thereof. Background technique [0002] al 2 o 3 Because of its excellent physical and mechanical properties and cutting performance, ceramic tool materials have been increasingly widely used in metal cutting, especially in the field of difficult-to-machine materials. However, due to the inherent brittleness of the ceramic tool material itself, its strength and toughness are low, which limits its further expanded application to a certain extent. At present, many scholars have done a lot of research on its reinforcement and toughening, and have made great progress. For particle reinforced Al 2 o 3 It is a ceramic tool material, with hard materials such as TiC, TiN, TiB2, SiC and WC as the reinforcing phase, through various toughening mechanisms such as crack deflection, crack branching, crack bridging, micr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/645
Inventor 曾维松
Owner 成都鑫三洋科技发展有限公司
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