Metallic ceramic arc spraying cored-wires for surface modification of cranshaft

Cored-wires with Al₂O₃ and NiCr-Cr₃C₂ as filler materials for surface modification of cranshaft were produced.Microstructures,bonding strength and wear-resistance of coatings produced with these two cored-wires were tested.The results showed that,with Al₂O₃ as filler material of the cored-wire,content of ceramic phase in the coating was high,and the coating was fairly bonded to the substrate.Aahesive strength was as high as 21.23 MPa,and the shear strength of the coating was 31.27 MPa.Resistance to wear of the coating was good.With same wear conditions,the wear loss of mass was only one-fourth of that of the cast iron sample.Addition of Ni₃Al and graghite was the most important reason for high adhesive strength.