Investigation of compound layer formed during ion nitriding of AISI 4140 steel

Celik A., KARADENIZ S.

SURFACE & COATINGS TECHNOLOGY, cilt.80, sa.3, ss.283-286, 1996 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 80 Sayı: 3
  • Basım Tarihi: 1996
  • Doi Numarası: 10.1016/0257-8972(95)02471-9
  • Dergi Adı: SURFACE & COATINGS TECHNOLOGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.283-286
  • Anahtar Kelimeler: ion nitriding, compound layer
  • Atatürk Üniversitesi Adresli: Evet

Özet

Low alloy AISI 4140 steel was ion nitrided at temperatures of 500, 550 and 600 degrees C for various times in a 50%N-2-50%H-2 gas mixture. The nature of the compound layer formed was studied by X-ray diffraction and optical metallography. The X-ray analysis shows the existence of a gamma-Fe4N compound zone on the surface at all three temperatures. The thickness of the compound layer increases with increasing time at 500 and 550 degrees C; however, it begins to decrease with increasing time at 600 degrees C.