Growth Kinetics and Microstructure of Iron Boride Layers on AISI 1050 Steel

İPEK AYVAZ S.

Metal Science and Heat Treatment, vol.65, no.11-12, pp.751-757, 2024 (SCI-Expanded, Scopus) identifier identifier

  • Publication Type: Article / Article
  • Volume: 65 Issue: 11-12
  • Publication Date: 2024
  • Doi Number: 10.1007/s11041-024-01001-9
  • Journal Name: Metal Science and Heat Treatment
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, Compendex, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.751-757
  • Keywords: growth kinetics, boriding, Fe2B, AISI 1050 steel, diffusion coefficient, microstructure
  • Manisa Celal Bayar University Affiliated: Yes

Abstract

Diffusion kinetics of boron in AISI 1050 steel is investigated. AISI 1050 steel samples are borided for 2, 4 and 6 h at 850, 900 and 950°C by the powder-pack boriding method using Ekabor-II boriding powder. After the powder-pack boriding, about 25.4 – 118.9 μm thick FeB/Fe2B boride layers are obtained on the surfaces of the samples. The boride layers have a typical tooth morphology and their hardness is 1071 – 1460 HV0.1. The growth rate constants for the boriding temperatures of 850, 900 and 950°C for the AISI 1050 steel are determined to be 1.522 × 10 –12, 2.964 × 10 –13 and 6.354 ×10 –12 m2 · sec –1, respectively. The boron diffusion activation energy in the AISI 1050 steel is 162.93 kJ · mol –1.