Metallographic structure display method for hafnium metal, hafnium metal and plasma torch cathode core

Abstract

The invention provides a metallographic structure display method for hafnium metal, hafnium metal and a plasma torch cathode core. The metallographic structure display method for the hafnium metal comprises the following steps of: grinding and polishing a hafnium metal metallographic sample step by step; placing the polished hafnium metal metallographic sample in a metallographic etchant so as to erode the sample; and taking out the hafnium metal metallographic sample, cleaning and drying the hafnium metal metallographic sample, and observing the microscopic metallographic structure of the hafnium metal metallographic sample. According to the method, the hafnium material is ground and polished step by step to remove defects and damage on the surface of the hafnium material, so that a smooth surface is obtained, the hafnium metal sample with extremely few embossing defects between different position phases is obtained, meanwhile, the damage caused to the surface of the hafnium material can be reduced to the minimum, the damage can be efficiently removed in the polishing process; a grain boundary is clearly corroded out through the erosion liquid, a clear and complete microstructure is obtained; and the preparation process of the cathode core is adjusted according to grain characteristics, so that the cathode core with ideal hafnium material microcosmic grain characteristics can be prepared.

Description

technical field [0001] The invention relates to the technical field of plasma torch cathode cores, in particular to a method for displaying the metallographic structure of hafnium metal, hafnium metal and plasma torch cathode cores. Background technique [0002] Modern plasma technology has great promotion potential in technological transformation and development of green energy with the goal of energy saving, environmental protection and safety. Its device has been applied in the fields of plasma chemical industry, plasma cutting, plasma spray welding and hazardous waste treatment. [0003] One of the difficulties in the application and promotion of plasma technology lies in the life of the plasma torch. For the existing plasma torch, the length of its service life is mainly affected by the electrodes arranged inside. Especially in the water vapor plasma torch, the life of the cathode material is relatively short, so the cathode head needs to be replaced frequently during ...

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention proposes a method for displaying the metallographic structure of hafnium metal and hafnium metal and the cathode core of the plasma torch, aiming at solving the problem that the microstructure of the existing hafnium-based metal is difficult to clearly display

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