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Self-lubricating ceramic cutting tool material added with metal-coated nano-solid lubricant composite powder and preparation method thereof

A technology of solid lubricants and composite powders, which is applied in the direction of metal material coating technology, lubricating compositions, liquid chemical plating, etc., can solve the problem of large differences in anti-friction and wear resistance of self-lubricating ceramic tools and weakening of self-lubricating ceramics. Improve the mechanical properties and wear resistance, good sintering density and high bonding strength to improve the cutting performance of cutting tools

Active Publication Date: 2019-05-07
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the directional arrangement of micron hexagonal boron nitride leads to a large difference in the anti-friction and wear resistance of the front and flank surfaces of the self-lubricating ceramic tool, which in turn weakens the cutting performance of the self-lubricating ceramic tool

Method used

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  • Self-lubricating ceramic cutting tool material added with metal-coated nano-solid lubricant composite powder and preparation method thereof
  • Self-lubricating ceramic cutting tool material added with metal-coated nano-solid lubricant composite powder and preparation method thereof
  • Self-lubricating ceramic cutting tool material added with metal-coated nano-solid lubricant composite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] Example 1: A self-lubricating ceramic tool material with metal-coated nano-solid lubricant composite powder, the mass percentage of each component is: α-Al 2 o 3 37%, (W,Ti)C 60.5%, h-BN n @Ni according to h-BN in composite powder n 1.5% by mass, MgO 0.5%, Y 2 o 3 0.5%.

[0064] The preparation steps are as follows:

[0065] (1) Weigh 1.5g NH 4 F, Add 100mL of distilled water, ultrasonically oscillate and stir to dissolve, slowly add 25mL of concentrated nitric acid under the condition of ultrasonic oscillating and stirring, add distilled water to 150mL, then add 1.5mg of polyvinylpyrrolidone, ultrasonically oscillate and stir to dissolve, and obtain a rough solution . Weigh 1.5g h-BN n Add the powder into the coarsening solution, ultrasonically shake for 30 minutes, and wash with distilled water to neutral after centrifugation to obtain roughened h-BN n Powder.

[0066] (2) Weigh 12g SnCl 2 2H 2 O and 2g Na 2 SnO 3 ·3H 2 O, add 10mL concentrated hydroch...

Embodiment 2

[0082] Example 2: A self-lubricating ceramic tool material with metal-coated nano-solid lubricant composite powder added, the mass percentage of each component is: α-Al 2 o 3 35%, (W,Ti)C 61%, h-BN n @Ni according to h-BN in composite powder n 3% by mass, MgO 0.5%, Y 2 o 3 0.5%.

[0083] The preparation steps are as follows:

[0084] (1) Weigh 9g NH 4 F, Add 400mL of distilled water, ultrasonically oscillate and stir to dissolve, slowly add 120mL of concentrated nitric acid under the conditions of ultrasonic oscillation and stirring, add distilled water to 600mL, then add 9mg of polyvinylpyrrolidone, ultrasonically oscillate and stir to dissolve, and obtain a rough solution. Weigh 3g h-BN n Add the powder into the coarsening solution, ultrasonically shake for 40 minutes, and wash with distilled water after centrifugation until neutral to obtain roughened h-BN n Powder.

[0085] (2) Weigh 30g SnCl 2 2H 2 O and 6g Na 2 SnO 3 ·3H 2 O, add 24mL of concentrated hydr...

Embodiment 3

[0097] Example 3: A self-lubricating ceramic tool material with metal-coated nano-solid lubricant composite powder added, the mass percentage of each component is: α-Al 2 o 3 38%, (W,Ti)C 56%, h-BN n @Ni according to h-BN in composite powder n 5% by mass, MgO 0.5%, Y 2 o 3 0.5%.

[0098] The preparation steps are as follows:

[0099] (1) Weigh 16g NH 4 F, Add 500mL of distilled water, ultrasonically oscillate and stir to dissolve, slowly add 200mL of concentrated nitric acid under the conditions of ultrasonic oscillation and stirring, add distilled water to 800mL, then add 16mg of polyvinylpyrrolidone, ultrasonically oscillate and stir to dissolve, and obtain a rough solution. Weigh 5g h-BN n Add the powder into the coarsening solution, ultrasonically shake for 50 minutes, and wash with distilled water after centrifugation until neutral to obtain roughened h-BN n Powder.

[0100] (2) Weigh 45g SnCl 2 2H 2 O and 10g Na 2 SnO 3 ·3H 2 O, add 37.5mL of concentrated...

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Abstract

The invention relates to a self-lubricating ceramic cutting tool material added with metal-coated nano-solid lubricant composite powder and a preparation method thereof. The self-lubricating ceramic cutting tool material is prepared by: taking h-BNn@Ni composite powder as the solid lubricant, adopting alpha-Al2O3 as the matrix, using (W, Ti)C as the reinforcement phase, and employing magnesium oxide and yttrium oxide as the sintering aids, and conducting wet ball-milling mixing and vacuum hot pressing sintering. Specifically, the h-BNn@Ni composite powder is obtained by: coarsening h-BNn powder in a coarsening liquid, then performing treatment in a sensitizing-activating solution, and then conducting plating in a chemical plating solution. The self-lubricating ceramic cutting tool materialprovided by the invention has good sintering density, h-BNn and the ceramic matrix have high bonding strength, thus toughening and reinforcing the self-lubricating ceramic cutting tool material, andthe synergistic effect can improve the mechanical properties and wear resistance of the self-lubricating ceramic cutting tool material.

Description

technical field [0001] The invention relates to a self-lubricating ceramic cutting tool material added with metal-coated nanometer solid lubricant composite powder and a preparation method thereof, belonging to the technical field of ceramic cutting tool materials. Background technique [0002] Compared with traditional tool materials such as high-speed steel and cemented carbide, ceramic tool materials have the advantages of high hardness, good wear resistance, high temperature resistance and good chemical inertness. They are suitable for cutting difficult-to-machine materials such as high hardness and high strength. Known as one of the most promising cutting tool materials in the 21st century. However, due to the inherent low toughness and low thermal shock resistance of ceramic materials, cutting fluid cannot be used for cooling and lubrication of ceramic tools during high-speed cutting. The large amount of cutting heat generated will cause severe thermal wear of the tool...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/10C04B35/622C04B35/64C04B35/63C10M169/04B22F1/02C23C18/18C23C18/32C10N30/06C10N40/22
Inventor 许崇海吴光永陈照强衣明东张静婕肖光春
Owner QILU UNIV OF TECH
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