Metallographic Preparation of Plasma Sprayed Tungsten Carbide Coating

Tungsten carbide coating by plasma spraying is mainly used for anti-sliding friction, vibration friction, wear resistance and corrosion protection of aero-engines below 500 ℃. It has been widely used in aero-engines at home and abroad.

The basic process of metallographic preparation is cutting mosaic polishing polishing. Some scholars have proposed a metallographic preparation method of plasma sprayed tungsten carbide coating, which is to determine the process and process parameters of the metallographic preparation method of Plasma Sprayed Tungsten Carbide coating. The utility model is characterized in that:

The WC coating was sampled by WEDM. The samples were mosaic, the volume ratio of Epofix epoxy resin to curing agent was 15:2, stirred, placed for 8 to 15 minutes, then poured into the sample ring for curing. Then, under 20 Newton/pressure, with 120 Finally, the polished samples were polished for 2 minutes at 300 rpm with non-flannel cloth, conventional lubricant and 1 mu diamond polishing agent.

It can be seen from the figure that the coating has clear structure and no cracks, and all kinds of damage to the sample can be minimized, which fundamentally improves the preparation level of the coating metallographic. The prepared tungsten carbide coating sample has excellent quality, which can more accurately determine the quality of the coating and improve the reliability of the application of the coating. It can meet the requirements of Metallographic Preparation in batch production of tungsten carbide coatings for military and civil aircraft, and bring huge social benefits and remarkable economic benefits.

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