The working performance of alloy coating and after its alloying of HT250 gray cast iron machine elements surface was studied.Utilizing the electronic microscope(EM) and Optical microscope(OM) an analysis upon surface appearance
structure of sub-surface and longitudinal section
surface roughness
composition of alloy coating and micro hardness
binding strength between alloy coating and matrix metal.Etc
was carried out.Testing result of contacting fatigue shows that the coating could enhance notably the contacting fatigue life.