KINETIC INVESTIGATION OF AISI 304 STAINLESS STEEL BORONIZED IN INDIRECT HEATED FLUIDIZED BED FURNACE

Topuz P., Cicek B., Akar O.

JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY, cilt.52, sa.1, ss.63-68, 2016 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52 Sayı: 1
  • Basım Tarihi: 2016
  • Doi Numarası: 10.2298/jmmb150301007t
  • Dergi Adı: JOURNAL OF MINING AND METALLURGY SECTION B-METALLURGY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.63-68
  • Anahtar Kelimeler: Boronizing, AISI 304, Indirect heated fluidized bed furnace, Kinetics of boron, DIFFUSION KINETICS, BORIDING KINETICS, STAINLESS-STEEL
  • Marmara Üniversitesi Adresli: Hayır

Özet

In this study, kinetic examinations on boronized AISI 304 Stainless Steel samples were described. Samples were boronized in indirect heated fluidized bed furnace consists of Ekabor 1 (TM) boronizing agent at 1123, 1223 and 1323 K for 1,2 and 4 hours. Morphologically and typically examinations of borides formed on the surface of steel samples were studied by optical microscope, scanning electron microscope (SEM) and X-Ray diffraction (XRD). Boride layer thickness formed on the steel XSCrNi 18-10 ranges from 12 to 176 mu m. The hardness of the boride layer formed on the steel XSCrNi 18-10 varied between 1709 and 2119 H nu(0.1). Layer growth kinetics were analyzed by measuring the extent of penetration of FeB and Fe2B sublayers as a function of boronizing time and temperature. The kinetics of the reaction has been determined with K=Ko exp (-Q/RT) equation. Activation energy (Q) of boronized steel X5CrNi 18-10 was determined as 244 kj/mol.