Microstructure and wear resistance of electro-thermal explosion sprayed stellite coating used for remanufacturing

Abstract

Electro-thermal explosion directional spraying was used to prepare the stellite coating on substrate of the AISI 1045 steel. The morphologies of cross-section and worn scar, porosity, distribution of elements, micro-hardness and wear resistance of the coating were determined by means of SEM, EDAX, micro-hardness tester and sliding wear tester. Because of the compact construction, good bonding and high hardness, the coating is characterized by good wear resistance. The results show that the mainly failure mode of the stellite coating is micro-plowing.

Keywords

stellite coating / microstructure / wear resistance / electro-thermal explosion directional spraying

References

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