Self-lubricating ceramic tool material with nickel-phosphorus alloy coated calcium fluoride composite powder and preparation method thereof

A composite powder and calcium fluoride-coated technology, applied in the field of self-lubricating ceramic tool materials and their preparation, can solve the problems of unsatisfactory improvement in bending strength and hardness, difficult maintenance of plating solution, and unsuitable for mass production.

Active Publication Date: 2017-06-09
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention realizes the improvement of the fracture toughness of the ceramic tool material, the improvement of its bending strength and hardness is not ideal
In addition, the patent document uses ultrasonic chemical plating to prepare nickel-boron-coated calcium fluoride composite powder, and there are still the following disadvantages: First, the calcium fluoride sensitization and activation process before chemical plating adopts a two-step method. It is relatively complicated, and the number of cleanings after sensitization has a great influence on the subsequent activation and electroless plating effect, it is difficult to control the quality consistency of differe

Method used

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  • Self-lubricating ceramic tool material with nickel-phosphorus alloy coated calcium fluoride composite powder and preparation method thereof
  • Self-lubricating ceramic tool material with nickel-phosphorus alloy coated calcium fluoride composite powder and preparation method thereof
  • Self-lubricating ceramic tool material with nickel-phosphorus alloy coated calcium fluoride composite powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Example 1: Adding CaF 2 @Ni-P composite powder self-lubricating ceramic tool material, the mass percentage of each component is: α-Al 2 o 3 31.8%, (W,Ti)C 62.5%, CaF 2 @Ni-P according to the CaF in the composite powder 2 5.2% by mass, MgO 0.5%. The preparation method is as follows:

[0059] (1) Weigh 31.8gα-Al 2 o 3 and 62.5g (W,Ti)C powder were added to an appropriate amount of absolute ethanol, ultrasonically dispersed and mechanically stirred for 20 minutes, and formulated into α-Al 2 o 3 suspension and (W,Ti)C suspension.

[0060] (2) Mix the above two suspensions, then add 0.5 g of MgO powder, ultrasonically disperse and mechanically stir for 20 min to obtain a multi-phase suspension.

[0061] (3) Pour the multi-phase suspension obtained in step (2) into a ball mill jar, add 900 g of cemented carbide grinding balls, and perform ball milling for 48 hours with nitrogen as a protective atmosphere.

[0062] (4) Prepare 100ml of sodium hydroxide solution with...

Embodiment 2

[0078] Example 2: Adding CaF 2 @Ni-P composite powder self-lubricating ceramic tool material, the mass percentage of each component is: α-Al 2 o 3 32.6%, (W,Ti)C 63.9%, CaF 2 @Ni-P according to the CaF in the composite powder 2 3% by mass, MgO 0.5%. The preparation method is as follows:

[0079] (1) Weigh 32.6gα-Al 2 o 3 and 63.9g (W,Ti)C powder were added to an appropriate amount of absolute ethanol, ultrasonically dispersed and mechanically stirred for 20min to form α-Al 2 o 3 suspension and (W,Ti)C suspension.

[0080] (2) Mix the above two suspensions, then add 0.5 g of MgO powder, ultrasonically disperse and mechanically stir for 25 min to obtain a multi-phase suspension.

[0081] (3) Pour the multiphase suspension obtained in step (2) into a ball mill jar, add 950 g of cemented carbide grinding balls, and perform ball milling for 45 hours with nitrogen as a protective atmosphere.

[0082] (4) Prepare 100ml of sodium hydroxide solution with a mass fraction of 1...

Embodiment 3

[0097] Example 3: Adding CaF 2 @Ni-P composite powder self-lubricating ceramic tool material, the mass percentage of each component is: α-Al 2 o 3 44.4%, (W,Ti)C 45.6%, CaF 2 @Ni-P according to the CaF in the composite powder 2 9% by mass, MgO1%. The preparation method is as follows:

[0098] (1) Weigh 44.4gα-Al 2 o 3 and 45.6g (W,Ti)C powder were added to an appropriate amount of absolute ethanol, ultrasonically dispersed and mechanically stirred for 25min, and formulated into α-Al 2 o 3 suspension and (W,Ti)C suspension.

[0099] (2) Mix the above two suspensions, then add 1 g of MgO powder, ultrasonically disperse and mechanically stir for 30 min to obtain a multi-phase suspension.

[0100] (3) Pour the multi-phase suspension obtained in step (2) into a ball mill jar, add 850 g of cemented carbide grinding balls, and perform ball milling for 50 h with nitrogen as a protective atmosphere.

[0101] (4) Prepare 200ml of sodium hydroxide solution with a mass fraction...

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Abstract

The invention relates to self-lubricating ceramic tool material with nickel-phosphorus alloy coated calcium fluoride composite powder and a preparation method thereof; the self-lubricating ceramic tool material comprises 30-48% of Alpha-Al2O3, 42-66.5% of (W, Ti)C, CaF2@Ni-P accounting for 3-12% by weight of CaF2, and 0.4-1.5% of MgO, wherein preparation of the CaF2@Ni-P includes: washing CaF2 powder, coarsening, adding the coarsened CaF2 powder into sensitizing-activating liquid for ultrasonic vibration, and chemically plating under the ultrasonic vibration with pH of 8.5-9.5 and the temperature of 35-45 DEG C. The invention also provides a preparation method of the self-lubricating ceramic tool material with nickel-phosphorus alloy coated calcium fluoride composite powder. The coating of nickel-phosphorus alloy can improve microscopic structure of the self-lubricating ceramic material; the self-lubricating ceramic tool material can be toughened and reinforced.

Description

technical field [0001] The invention relates to a self-lubricating ceramic tool material with nickel-phosphorus alloy coated calcium fluoride composite powder and a preparation method thereof, belonging to the technical field of ceramic tool materials. Background technique [0002] With the advancement of industrial manufacturing technology, machining technology is developing in the direction of high efficiency, high precision and greening. Tool is one of the key factors affecting the efficiency, precision and cost of machining. Compared with traditional tool materials such as high-speed steel and cemented carbide, ceramic tool materials have the advantages of high hardness, wear resistance, high temperature resistance and good chemical stability. However, due to the inherent low toughness and low thermal shock resistance of ceramic materials, it is not suitable to use cutting fluid for cooling and lubrication of ceramic tools during high-speed cutting, resulting in high cu...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/622C04B35/63
CPCC04B35/5611C04B35/5626C04B35/622C04B35/6303C04B2235/3206C04B2235/3217C04B2235/405C04B2235/445C04B2235/96
Inventor 许崇海吴光永衣明东肖光春陈照强
Owner QILU UNIV OF TECH
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