Preparation method of nanocrystalline and amorphous composite structure multilayer hard film of water turbine guide vane

Abstract

The invention discloses a preparation method of a nanocrystalline and amorphous composite structure multilayer hard film of a water turbine guide vane. The hard film comprises a Cr bottom layer, a TiSi transition layer, a TiSiN nanocrystalline and amorphous composite structure transition layer and a sediment erosive wear resistant TiSiCN nanocrystalline and amorphous composite structure film layer which are sequentially deposited on the surface of the water turbine guide vane. The preparation method comprises the following steps that the surface of the water turbine guide vane is cleaned, the water turbine guide vane is placed on a rotating device in a vacuum chamber to be rotated, and plasma cleaning is conducted; and the Cr bottom layer, the TiSi transition layer, theTiSiN nanocrystalline and amorphous composite structure transition layer and the sediment erosive wear resistant TiSiCN nanocrystalline and amorphous composite structure film layer are sequentially deposited on the surface of the water turbine guide vane through a multi-arc ion plating physical vapor deposition method, and a nano composite multilayer hard film of the water turbine guide vane is obtained. The service life of the water turbine guide vane can be effectively prolonged, and the preparation method is simple.

Description

technical field [0001] The invention relates to the technical fields of material science and surface wear-resistant coating protection, in particular to a preparation method of a nanocrystalline and amorphous composite structure multilayer hard film that strengthens the surface of a guide vane of a water turbine. Background technique [0002] The sediment erosion and wear of the flow-passing parts of the turbine seriously cause the hydropower equipment to be replaced frequently, wasting a lot of manpower and material resources, and at the same time affect the economic benefits of the hydropower station. Therefore, it is very urgent to solve the problem of water turbine flow parts, especially water turbine guide vane resistant to sediment erosion and wear. As a power machine, water turbines play an important role in hydropower generation. However, the water environment in rivers is complex and there is a large amount of sediment, which is easy to cause erosion and wear to the...

AI Technical Summary

Problems solved by technology

However, these methods often have some shortcomings, such as polluting the environment, complicated process, expensive equipment, long production cycle, and high cost. Therefore, it is urgent to develop a simple and feasible method with high production efficiency to enhance the erosion resistance of turbine guide vanes. , prolong its service life

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