Self-lubrication and abrasion-resistantcomposite modification method for nano copper/microalloy layer on surface of metal

Abstract

The invention provides a self-lubrication and abrasion-resistant composite modification method for a nano copper / micro alloy layer on the surface of metal. The self-lubrication and abrasion-resistantcomposite modification method includes the following steps that nano copper oxide and an adhesion agent are evenly mixed to form paste, the viscosity of the paste is adjusted by adding ethyl alcohol absolute, and modified nano copper oxide paste is obtained; the modified nano copper oxide paste coats the surface of a workpiece; and the dried workpiece is put into a gas nitriding furnace to be subjected to surface in-situ reduction and surface nitriding treatment. According to the self-lubrication and abrasion-resistant composite modification method for the nano copper / micro alloy layer on thesurface of the metal,hydrogen and active nitrogen atoms produced in the gas nitriding process are utilized, through reduction of the nano copper oxide coating surfacelayers of parts, nitridation of the parts is realized, a hard nitriding layer is obtained, meanwhile, a nano copper coating is further obtained on the surface, and the anti-stripping ability of the copper coating is improved; meanwhile, nano copper formed in situ has self-lubricating property; and the processing temperature is low, deformation of the workpiece is small, the processing requirements of precision parts can be met, the production cost is low, and pollution to the environmentis avoided.

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...

AI Technical Summary

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

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