Surface modification of atmospheric plasma sprayed cermet coatings by plasma transferred arc method

BAYAR İ., ULUTAN M.

TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING, cilt.97, sa.6, ss.298-304, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 97 Sayı: 6
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1080/00202967.2019.1668123
  • Dergi Adı: TRANSACTIONS OF THE INSTITUTE OF METAL FINISHING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.298-304
  • Anahtar Kelimeler: Atmospheric plasma spray, plasma transferred arc welding, wear, microstructure, WEAR-RESISTANCE, BEHAVIOR, STEEL
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

AISI 8620 steel substrates were coated with WC?Co and Cr3C2?NiCr by using the atmospheric plasma spraying (APS) method. Subsequently, surface melting of samples coated with APS was performed at different current values using the plasma transfer arc (PTA) method. Microstructure, microhardness, and wear properties of as-sprayed and surface-modified coatings were investigated. The microstructure of the APS-coated surface had some voids, cracks and nonhomogeneous areas. These defects were eliminated with the PTA surface modification process and microstructural properties of coatings were improved. The wear resistance of PTA modified coatings was also increased. The highest wear resistance and microhardness were obtained in WC?Co coating modified by PTA at a current of 80?A. The wear resistance of this coating was 8.5 times higher than that of the substrate. The coating hardness reached values as high as 980?HV0,1 in this coating.