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, Costa Rica, 15 - 19 February 2009, pp.305-311 identifier

  • Publication Type: Conference Paper / Full Text
  • City: San-Francisco
  • Country: Costa Rica
  • Page Numbers: pp.305-311

Abstract

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.