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Preparing method of wear-resistant coating on surface of steam turbine rotor wheel groove gauge

A technology of steam turbine rotor and wear-resistant coating, which is applied in the direction of coating, overlay coating, metal material coating process, etc., which can solve problems affecting measurement accuracy, gauge surface wear, gauge failure, etc., and achieve low deposition temperature , Improve wear resistance, good diffraction effect

Active Publication Date: 2016-06-15
SHANGHAI INST OF TECH +1
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  • Claims
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AI Technical Summary

Problems solved by technology

During the use of the gauge, the outer surface is in frictional contact with the workpiece, and repeated use will easily cause the surface of the gauge to wear, affect the measurement accuracy, and cause the gauge to fail quickly
In addition, if the gauge is not treated in time after use, it is easy to cause corrosion and other behaviors on its surface.

Method used

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  • Preparing method of wear-resistant coating on surface of steam turbine rotor wheel groove gauge

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Embodiment Construction

[0029] The present invention will be described in detail below in terms of specific embodiments in conjunction with the accompanying drawings. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It is to be noted that other embodiments may be utilized or structural and functional modifications may be made to the embodiments set forth herein without departing from the scope and spirit of the invention.

[0030] The invention forms a TiN / DLC composite coating on the surface of the steam turbine rotor wheel groove gauge, thereby making the steam turbine rotor wheel groove gauge have wear resistance. The purpose of the invention is to improve the TiN / DLC composite coating and The binding force and the small surface friction coefficient of the surface of the steam turbine rotor wheel groove gauge further improve the wear resistance of the surface of the steam turbine rotor wheel g...

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Abstract

The invention provides a preparing method of a wear-resistant coating on the surface of a steam turbine rotor wheel groove gauge. The method comprises the steps that 1, a steam turbine rotor wheel groove gauge without a coating and a vacuum furnace are provided, and a Ti target material is arranged in the vacuum furnace; 2, the steam turbine rotor wheel groove gauge without the coating is placed into the vacuum furnace, and the surface of the steam turbine rotor wheel groove gauge without the coating is subjected to target adding activation; 3, TiN coating deposition is carried out on the steam turbine rotor wheel groove gauge with the activated surface, wherein temperature of a furnace chamber of the vacuum furnace is adjusted to be 180 DEG C-200 DEG C, N2 gas is introduced into the chamber of the vacuum furnace, flow of the N2 gas is 150-180 sccm, the Ti target material is electrified to serve as an evaporation source, electrification currents are 120-140 A, bias voltage added to the steam turbine rotor wheel groove gauge is 150-180 V, after 15-20 minutes passes, TiN coating deposition is completed, and the next step is executed; 4, DLC coating deposition is carried out on the surface of the TiN coating.

Description

technical field [0001] The invention relates to the field of metal gauge surface protection, in particular to a method for preparing a wear-resistant coating on the surface of a wheel groove gauge of a steam turbine rotor. Background technique [0002] Metal gauges play an extremely important role in the field of material processing. Its main function is to control the dimensions of the workpiece and check whether the workpiece is qualified. During the use of the gauge, the outer surface is in frictional contact with the workpiece, and repeated use will easily cause the surface of the gauge to wear, affect the measurement accuracy, and cause the gauge to fail quickly. In addition, if the gauge is not treated in time after use, it is very easy to cause corrosion and other behaviors on its surface. The surface modification technology of materials can prepare a protective coating with high hardness, wear resistance and corrosion resistance on the surface of metal gauges, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C28/04C23C14/34C23C14/06C23C16/44C23C16/27
CPCC23C14/0641C23C14/34C23C16/27C23C16/44C23C28/042
Inventor 张东民张而耕姚松骏恽庞杰刘铭心盛育东冯全华曹启伟陈厚良
Owner SHANGHAI INST OF TECH
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