Microstructure and properties of martensite stainless steel coating by different spraying methods

The mantensite stainless steel coatings were prepared on substrate of AISI 1045 steel with the electro-thermal explosion directional spraying (EEDS) technology and high velocity arc spraying (HVAS)technology. The microstructure, element distributions, phases, hardness and elastic modulus were analysed by means of scanning electronic microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), X-ray diffraction (XRD)and nano-tester, respectively.Results showed that the coatings of EEDS are more compact than that of HVAS, and EEDS coatings possess higher nano-hardness and plastic modulus. The bond of EEDS coatings is a metallurgical bond, but that of HVAS coatings is a mechanical one.