Enhancing wear resistance of R220 rail steels by quenching and partitioning (Q&P) treatment

GECÜ R.

Materials Letters, cilt.354, 2024 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 354
  • Basım Tarihi: 2024
  • Doi Numarası: 10.1016/j.matlet.2023.135400
  • Dergi Adı: Materials Letters
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Corrosion, Metals and alloys, Microstructure, Wear and tribology
  • Yıldız Teknik Üniversitesi Adresli: Evet

Özet

In this study, R220 steels were subjected to the Q&P treatment after austenitization at 900 °C for 15 min. The austenitized samples were immersed in cold, warm, and boiled water baths. The quenching step was interrupted, and the specimens were immediately placed in a furnace at 500 °C and held there for 5 min. The multiphase structure, including tempered martensite, retained austenite, bainitic ferrite, and fresh martensite, was achieved by the Q&P treatment. The wear rate of the untreated R220 rail steel was decreased by up to 89 % with a slight increase in corrosion losses. The best wear resistance was obtained in the sample cooled in warm water due to the balance between its tensile strength, toughness, and hardness.