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Self-lubricating and anti-corrosion composite modification method of nano-copper/micro-alloy layer on metal surface

A metal surface, composite modification technology, applied in metal material coating process, coating, solid diffusion coating, etc. High energy consumption and improved lubrication

Active Publication Date: 2020-11-06
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In order to overcome the deficiencies of the prior art, the present invention provides a self-lubricating and anti-corrosion composite modification method of nano-copper / micro-alloy layer on the metal surface, which solves the problems of high energy consumption and environmental pollution in the electroplating copper process, and the process The implementation is not limited by the size of the workpiece and has wide applicability

Method used

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  • Self-lubricating and anti-corrosion composite modification method of nano-copper/micro-alloy layer on metal surface
  • Self-lubricating and anti-corrosion composite modification method of nano-copper/micro-alloy layer on metal surface
  • Self-lubricating and anti-corrosion composite modification method of nano-copper/micro-alloy layer on metal surface

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Embodiment 1

[0046] Preferred embodiment 1 of the present invention provides a method for self-lubricating and anti-corrosion composite modification of a nano-copper / micro-alloy layer on the surface of a metal workpiece. The metal workpiece is a QT500-7 ductile iron crankshaft, which includes the following steps:

[0047]S1 uniformly mix nano-copper oxide particles and binder to form a slurry, and adjust the viscosity of the slurry to 2100cps by adding absolute ethanol to obtain a modified nano-copper oxide slurry; the particle size of the nano-copper oxide particles is ≤ 100nm , the binder is a mixture of terpineol and ethyl cellulose (the mass ratio of the two is 9:1), and the mass ratio between the nano-copper oxide particles and the binder is 1.8:1. Among them, the viscosity is adjusted to make the coating better applied to the surface of the workpiece, and absolute ethanol can volatilize during the drying process, avoiding the introduction of impurity elements, and the volatilization p...

Embodiment 2

[0052] Preferred embodiment 2 of the present invention provides a method for self-lubricating and anti-corrosion compound modification of a nano-copper / micro-alloy layer on the surface of a metal workpiece. The metal workpiece is a QT500-7 ductile iron crankshaft, comprising the following steps:

[0053] S1 uniformly mix the nano-copper oxide particles and the binder to form a slurry, and adjust the viscosity of the slurry to 2100cps by adding absolute ethanol to obtain a modified nano-copper oxide slurry; wherein, the particle size of the nano-copper oxide particles ≤100nm, the binder is a mixture of terpineol and ethyl cellulose (the mass ratio of the two is 9:1), and the mass ratio between the nano copper oxide particles and the binder is 1.8:1.

[0054] After the semi-finishing of the S2 workpiece, it is vacuum annealed at 600°C for 4 hours to eliminate stress, and then it is finished, and then the modified nano-copper oxide slurry is coated on the surface of the workpiece....

Embodiment 3

[0074] The preferred embodiment 3 of the present invention provides a self-lubricating and anti-corrosion composite modification method of nano-copper / micro-alloy layer on the surface of a metal workpiece. The metal workpiece is a 42CrMo quenched and tempered gear, comprising the following steps:

[0075] S1 uniformly mix nano-copper oxide particles and binder to form a slurry, and adjust the viscosity of the slurry to 2000cps by adding absolute ethanol to obtain a modified nano-copper oxide slurry; wherein, the particle size of the nano-copper oxide particles ≤100nm, the binder is a mixture of terpineol and ethyl cellulose (the mass ratio of the two is 6:4), and the mass ratio between the nano copper oxide particles and the binder is 1.6:1.

[0076] S2 The workpiece is cleaned to remove oil and rust, and then apply the modified nano-copper oxide slurry on the surface of the workpiece. The thickness of the coated slurry is 7 μm, and then place the workpiece in a drying oven to ...

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Abstract

The invention provides a self-lubricating and anti-corrosion composite modification method of nano-copper / micro-alloy layer on metal surface, comprising the following steps: uniformly mixing nano-copper oxide and binder to form a slurry, and adjusting the slurry by adding absolute ethanol The viscosity of the modified nano-copper oxide slurry is obtained; the modified nano-copper oxide slurry is coated on the surface of the workpiece; the dried workpiece is placed in a gas nitriding furnace for in-situ surface reduction and surface nitriding treatment. The invention utilizes the hydrogen and active nitrogen atoms generated in the gas nitriding process to reduce the nano-copper oxide coated on the surface of the part, not only realizes the nitriding of the part, obtains a harder nitriding layer, but also obtains a The nano-copper coating is improved, and the anti-stripping ability of the copper coating is improved, and the nano-copper formed in situ has self-lubricating properties. The method of the invention has low processing temperature and small workpiece deformation, can meet the processing requirements of precision components, has low production cost, and has no pollution to the environment.

Description

technical field [0001] The invention relates to the technical field of metal surface treatment, in particular to a self-lubricating and anti-corrosion composite modification method of nano-copper / micro-alloy layer on the metal surface. Background technique [0002] Copper has high conductivity (resistivity 1.724×10 -8 Ω·m), high thermal conductivity (thermal conductivity 373.56W·(m·K) -1 ), corrosion resistance, suitable strength (200~360MPa), easy processing and formability and other comprehensive physical and mechanical properties. Pure copper is a non-magnetic metal, and copper can be plated very well. At the same time, copper can inhibit the growth of microorganisms such as bacteria, and 99% of bacteria in the water will be killed in a copper environment for 5 hours. Therefore, copper is widely used in industries such as wear reduction of mechanical parts, antibacterial and electronic power instruments. [0003] Among them, nano-copper has remarkable self-lubricating...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C24/02C23C8/24
Inventor 孙金全赫庆坤刘赞谢鲲崔洪芝
Owner SHANDONG UNIV OF SCI & TECH
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