SURFACE CHARACTERISTICS OF LOW-TEMPERATURE GAS NITRIDED 316 Ti AUSTENITIC STAINLESS STEELS


Celik O., Kayali E. S., Çimenoğlu H.

138th TMS Annual Meeting and Exhibition, San-Francisco, Kostarika, 15 - 19 Şubat 2009, ss.305-311 identifier

  • Yayın Türü: Bildiri / Tam Metin Bildiri
  • Basıldığı Şehir: San-Francisco
  • Basıldığı Ülke: Kostarika
  • Sayfa Sayıları: ss.305-311
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

Uniform, compact and precipitate free hybrid solution layer (nitrogen and carbon rich) was succesfully formed on the surface of a 316Ti austenitic stainless steel by low temperature nitriding process (below 450 degrees C) in a fluidized bed furnace. After the nitriding, 316 Ti austenitic steel exhibited extremely high surface hardness (1690 HV0.05) when compared to the hardness of as-received state (295 HV0.05). Formation of solid solution layer, which did not lead any embrittlement effect during tensile and bending tests, enhanced the pitting corrosion resistance, remarkably.