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Preparation method of metal-matrix self-lubricating material

A lubricating material and metal technology, applied in the field of self-lubricating material preparation, can solve the problems of weakening the mechanical and tribological properties of composite materials, stress concentration, poor wettability, etc. Effects of improved impact toughness and improved relative density

Active Publication Date: 2017-01-04
重庆弘蒙华鼎科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: for the current common metal-based self-lubricating materials are mainly composed of solid lubricant graphite and metal matrix materials, due to the poor wettability of graphite and metal matrix, the interface bonding strength is low, and there are gaps at the interface junction , the splitting of the matrix is ​​more serious, it is easy to cause stress concentration, and the defects of weakening the mechanical and tribological properties of the composite material are provided. A method for preparing a metal-based self-lubricating material is provided. Extract the enzymatic solution, use it to modify the surface of graphite powder to improve the hydrophilicity of graphite powder, and then coat a layer of metal palladium on the surface of graphite powder to play the role of catalysis and crystal nucleation center, and finally electroless plate a layer of copper, Metal-based self-lubricating material
The present invention improves the interface structure and wettability of the base material and the graphite by modifying the graphite surface, and enhances the interface bonding between the base material and the graphite, which helps to improve the comprehensive mechanical properties and tribology of the copper-based graphite self-lubricating composite material It solves the problems of poor wettability between graphite and metal substrates, low interface bonding strength, easy to cause stress concentration, and weakens the mechanical and tribological properties of composite materials. It has broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] Weigh 700g eel, manually remove the fish bones and mash the eel meat in a stone mortar to obtain eel pulp, then weigh 4kg pineapple, peel off the skin and cut into pieces, put it in a juicer for 15 minutes, and use gauze Filter and remove the filter residue to obtain pineapple juice; mix the eel meat slurry and pineapple juice prepared above and put them together in a ceramic enzymolysis tank as an enzymolysis substrate, and add 10% of the total mass of the enzymolysis substrate to the enzymolysis tank. For alkaline protease, use 0.5mol / L sodium hydroxide solution to adjust the pH of the substrate to 8.0, put the enzymolysis tank in a 25°C incubator, and keep it warm for 6 hours; after the end of the enzymolysis, centrifuge the enzymolysis product Separate and remove the precipitate to obtain the supernatant, mix the 200-mesh graphite powder and the supernatant evenly according to the solid-liquid ratio of 1:3, pour it into the Erlenmeyer flask, place it on a shaker and ...

example 2

[0023]Weigh 750g eel, manually remove the fish bones and mash the eel meat in a stone mortar to obtain eel pulp, then weigh 4kg pineapple, peel off the skin and cut into pieces, put it into a juicer for 18 minutes, and use gauze Filter and remove the filter residue to obtain pineapple juice; mix the eel meat slurry and pineapple juice prepared above and put them together in a ceramic enzymolysis tank as an enzymolysis substrate, and add 10% of the total mass of the enzymolysis substrate to the enzymolysis tank. For alkaline protease, use 0.5mol / L sodium hydroxide solution to adjust the pH of the substrate to 8.3, put the enzymolysis tank in a 30°C incubator, and keep it warm for 7 hours; after the end of the enzymolysis, centrifuge the enzymolysis product Separate and remove the precipitate to obtain the supernatant, mix the 250-mesh graphite powder and the supernatant according to the solid-to-liquid ratio of 1:3, pour it into the Erlenmeyer flask, place it on a shaker and vib...

example 3

[0026] Weigh 800g eel, manually remove the fish bones and mash the eel meat in a stone mortar to obtain eel pulp, then weigh 5kg pineapple, peel off the skin and cut into pieces, put it into a juicer for 20 minutes, and use gauze Filter and remove the filter residue to obtain pineapple juice; mix the eel meat slurry and pineapple juice prepared above and put them together in a ceramic enzymolysis tank as an enzymolysis substrate, and add 10% of the total mass of the enzymolysis substrate to the enzymolysis tank. For alkaline protease, use 0.5mol / L sodium hydroxide solution to adjust the pH of the substrate to 8.5, put the enzymolysis tank in a 35°C incubator, and keep it warm for 8 hours; after the end of the enzymolysis, centrifuge the enzymolysis product Separate and remove the precipitate to obtain the supernatant, mix the 300-mesh graphite powder and the supernatant evenly according to the solid-liquid ratio of 1:3, pour it into the Erlenmeyer flask, place it on a shaker an...

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Abstract

The invention relates to a preparation method of a metal-matrix self-lubricating material and belongs to the field of preparation of self-lubricating materials. The method comprises the following steps of performing compound enzymic hydrolysis on an eel rich in amino acid and a pineapple to extract enzymatic hydrolysate; performing surface modification on graphite powder by using the enzymatic hydrolysate to improve the hydrophilicity of the graphite powder; then coating the surface of the graphite powder with a layer of metal palladium to realize effects of catalyzing and crystallizing a nucleation center; finally, chemically plating a layer of copper, thus obtaining the metal-matrix self-lubricating material. According to the preparation method disclosed by the invention, by performing surface modification on graphite, an interface structure and the wettability between a matrix material and the graphite are improved, interface bonding between the matrix and the graphite is enhanced, and comprehensive mechanical properties and tribological properties of a copper-matrix graphite self-lubricating composite material are favorably improved; the problems that the wettability of the graphite and the metal matrix is poorer, the interface bonding strength is low, stress concentration is easily caused, and the mechanical and properties and the tribological properties of the composite material are weakened are solved; the preparation method has a broad application prospect.

Description

technical field [0001] The invention relates to a method for preparing a metal-based self-lubricating material, belonging to the field of self-lubricating material preparation. Background technique [0002] Metal-based solid self-lubricating materials are composed of metal matrix materials and solid lubricating components. It can be used under special conditions such as high vacuum. [0003] Copper-based self-lubricating composite materials are an important part of metal-based self-lubricating materials, and are the first choice for solving industrial tribological problems at 400-500 °C. Pure copper, also known as red copper, has high thermal conductivity, which ensures good heat dissipation during friction and has good plasticity. Copper powder is easy to press and form. Copper has low affinity with oxygen, and has the characteristics of anti-oxidation and corrosion resistance. However, due to the low strength and hardness of pure copper, pure copper is rarely used as the...

Claims

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Application Information

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IPC IPC(8): C22C1/10
CPCC22C1/101
Inventor 金峰林茂平
Owner 重庆弘蒙华鼎科技有限公司
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