Thermal degradation of cemented-carbide cutting inserts and influence of dry cutting on repen limestoneKortnik, Jože (Avtor) Zupančič, Matej (Avtor) Zaky, Adam (Avtor) Markoli, Boštjan (Avtor) chainsaw machinedimension stonethermographic analysiscutting insertsThis paper presents the results of a thermographic analysis of Fantini Sandvik H6T cutting inserts during the dry cutting of dimension stone – Repen limestone – using a Fantini 70-RA-BU bank chainsaw machine in the underground rooms of the Debela Griža quarry, Slovenia. It is known from literature that the temperature reached at the contact between a cutting insert and stone is also an important factor affecting the service life and cutting performance when cutting dimension stone. Furthermore, the critical temperature for thermal damage during granite cutting was identified as 100–200°C, while for cutting sandstone or limestone, it was 100°C. Specimens of the used H6T cutting inserts were subjected to a detailed metallographic investigation to evaluate the changes in the surface structure and hardness. Additionally, possible reasons for the wear of cutting inserts due to the contact temperature and surface tension were discussed.Inštitut za kovinske materiale in tehnologije20252026-01-10 04:30:35Članek v reviji177859UDK: 666.61:544.016.2:543.573ISSN pri članku: 1580-2949DOI: 10.17222/mit.2025.1554COBISS_ID: 261778435sl