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Self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added and preparation method thereof

A technology of hexagonal boron nitride and composite powder, which is applied in the field of ceramic tool materials, can solve the problems of inability to balance friction reduction performance and mechanical performance, and achieve the effects of improving mechanical performance and cutting performance, improving effect, and improving sensitization effect.

Active Publication Date: 2021-10-22
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to solve the problem that the anti-friction performance and mechanical performance of self-lubricating ceramic cutting tools in the prior art cannot be balanced by developing and applying a new solid lubricant with high mechanical performance

Method used

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  • Self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added and preparation method thereof
  • Self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added and preparation method thereof
  • Self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1: A self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added, the mass percentage of each component is: α-Al 2 o 3 32.65%, (W,Ti)C 66%, BNNS@Ni 0.35% based on the mass of BNNS in the composite powder, MgO 0.5%, Y 2 o 3 0.5%. The preparation method is as follows:

[0060] (1) Weigh 3.5g SnCl 2 2H 2 O, add 100mL of isopropanol, stir to dissolve, add isopropanol to 350mL, ultrasonically oscillate and stir evenly to obtain a sensitized solution, then add 3g of tin particles; weigh 0.35g of BNNS powder and add it to 300mL of isopropanol for ultrasonication Disperse for 20 minutes, centrifuge and add to the sensitization solution, ultrasonically shake and stir for 10 minutes, filter out the tin particles, centrifuge and wash once with distilled water to obtain sensitized BNNS powder.

[0061] (2) Weigh 0.15g PdCl 2 , add 3mL concentrated hydrochloric acid, stir to dissolve, add distilled water to 500m...

Embodiment 2

[0072] Example 2: A self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added, the mass percentage of each component is: α-Al 2 o 3 34%, (W,Ti)C 64.5%, BNNS@Ni 0.5% based on the mass of BNNS in the composite powder, MgO 0.5%, Y 2 o 3 0.5%. The preparation method is as follows:

[0073] (1) Weigh 6g SnCl 2 2H 2 O, add 200mL of isopropanol, stir to dissolve, add isopropanol to 500mL, ultrasonically oscillate and stir evenly to obtain a sensitized solution, then add 4g of tin particles; weigh 0.5g of BNNS powder and add it to 400mL of isopropanol for ultrasonication Disperse for 25 minutes, centrifuge and add to the sensitization solution, ultrasonically shake and stir for 12 minutes, filter out tin particles, centrifuge and wash once with distilled water to obtain sensitized BNNS powder.

[0074] (2) Weigh 0.2g PdCl 2 , add 4mL concentrated hydrochloric acid, stir to dissolve, add distilled water to 500mL, then ad...

Embodiment 3

[0082] Example 3: A self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added, the mass percentage of each component is: α-Al 2 o 3 38.3%, (W,Ti)C 60%, BNNS@Ni 0.7% based on the mass of BNNS in the composite powder, MgO 0.5%, Y 2 o 3 0.5%. The preparation method is as follows:

[0083] (1) Weigh 7.5g SnCl 2 2H 2O, add 300mL of isopropanol, stir to dissolve, add isopropanol to 500mL, ultrasonically oscillate and stir evenly to obtain a sensitized solution, then add 5g of tin particles; weigh 0.7g of BNNS powder and add it to 500mL of isopropanol for ultrasonication Disperse for 30 minutes, centrifuge and add to the sensitization solution, ultrasonically shake and stir for 15 minutes, filter out the tin particles, centrifuge and wash once with distilled water to obtain sensitized BNNS powder.

[0084] (2) Weigh 0.4g PdCl 2 , add 8mL concentrated hydrochloric acid, stir to dissolve, add distilled water to 800mL, th...

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Abstract

The invention relates to a self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder added and a preparation method thereof. The self-lubricating ceramic tool material uses α-phase alumina as the matrix, tungsten carbide and titanium as the reinforcing phase, nickel-coated hexagonal boron nitride nanosheet (BNNS@Ni) composite powder as the solid lubricant, and magnesium oxide and Yttrium oxide is used as a sintering aid through wet ball milling and vacuum hot pressing sintering. The invention also provides a preparation method of the self-lubricating ceramic cutting tool material. The invention improves the dispersion of BNNS in the ceramic matrix, improves the uniformity of the microstructure of the ceramic material, and generates a liquid phase during the sintering process, improves the sintering density of the self-lubricating ceramic material, and can also improve the self-lubricating ceramic tool material Toughening and strengthening. At the same time, it takes into account the mechanical properties and cutting performance of self-lubricating ceramic tool materials.

Description

technical field [0001] The invention relates to a self-lubricating ceramic tool material with nickel-coated hexagonal boron nitride nanosheet composite powder and a preparation method thereof, belonging to the technical field of ceramic tool materials. Background technique [0002] In recent years, with the continuous improvement of the overall strength of my country's equipment manufacturing industry, the development of advanced equipment represented by high-speed rail transit equipment, large aircraft, and high-efficiency precision machine tools has achieved rapid development. Development and application of difficult-to-process materials such as strength, high temperature resistance, and corrosion resistance. At the same time, social progress has put forward high-efficiency, energy-saving and environmental protection requirements for the processing and manufacturing industry, which has given birth to advanced cutting processes such as high-speed dry cutting and hard cutting...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/56C04B35/645
Inventor 许崇海吴光永张静婕肖光春陈照强衣明东
Owner QILU UNIV OF TECH
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