Structure And Mechanical Properties Of Stainless Steel Coatings Deposited By Arc Wire Spraying.

In this work, two different stainless steel namely (X10CrNi 18-8 and X30Cr13) were sprayed onto a steel blasted substrate E335 using arc spraying process. The chemical composition of the phases that are present in the coatings were characterized by using an X-ray diffraction (XRD), Measurements of Vickers hardness, under a load of 300g, were also performed on the coatings. The tribological tests were carried out on a type of tribometer pin-on-disc at differents loads (5N, 10, 15, 20 and 30N) for sliding duration of 30 minutes in order to determine the rate wear under two different sliding velocities. The results showed It was found that the solid solution (bcc) (Fe, Cr, Ni), while chrome carbide Cr7C3 and Ni3C phases are formed for X10CrNi18-8. However X30Cr13 revealed the presence of body-centered cubic (bcc) (Fe, Cr) structure that corresponds to the solid solution and the formation of only carbides of chrome such as CCr and C7Cr3, dealing with the large statistical variations of composition. We also note the presence of a large fraction of oxides type Fe3O4.The Vickers microhardness of X30Cr13 is the higher due to the emergence of Oxides which is not appears in another stainless coating X10CrNi18-8. The wear resistance of the two stainless coatings X10CrNi18-8 and X30Cr13 is affected by sliding velocities under different applied loads. The stainless coating X10CrNi18-8 exhibits remarkably bad wear rate than X30Cr13 coating.