Influence of austempering of as-cast medium carbon high-silicon steel on wear resistance

Sedlaček, Marko (author), Klančnik, Grega (author), Nagode, Aleš (author), Burja, Jaka (author)

The aim of this study was to evaluate the effect of austempering compared to quenching and low-temperature tempering on wear resistance of an as-cast medium carbon high-silicon steel intended for rock breaking. Austempering was done by isothermal holding at 270, 300 and 350 °C in molten salt baths, while quenching was done in water. The austempering treatments resulted in microstructural combinations of bainite and martensite. The isothermal holding at 270 °C resulted in bainite and self-tempered martensite, while isothermal holdings at 300 and 350 °C resulted in bainite and untempered martensite. The two quench and temper treatments resulted in tempered martensite. In general austempering resulted in lower hardness values when compared to quenching and tempering but higher impact toughness. The wear resistance was best for quenching and low temperature tempering, followed by austempering at 270 °C, but at slightly lower hardness and 25% higher impact toughness. The other two austempering treatments resulted in worse wear resistance.

• Language: English
• Keywords: austempering wear, lower bainite, wear, impact toughness, hardness
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: NTF - Faculty of Natural Sciences and Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 12 str.
• Numbering: Vol. 14, iss. 24, art. 7518
• PID: 20.500.12556/RUL-136686
• UDC: 620.1:669.1:67.017
• ISSN on article: 1996-1944
• DOI: 10.3390/ma14247518
• COBISS.SI-ID: 88748035
• Publication date in RUL: 16.05.2022

Record is a part of a journal

• Title: Materials
• Shortened title: Materials
• Publisher: MDPI
• ISSN: 1996-1944
• COBISS.SI-ID: 33588485

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 08.12.2021

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0050
• Name: Kovinski materiali in tehnologije