20.500.12556/RUL-136433 Expression of the self-sharpening mechanism of a roller cone bit during wear due to the influence of the erosion protection carbide coating Roller cone drill bits are used in drilling larger diameter wells. The drilling efficiency of the roller cone drill bit depends on the wear rate of the materials that forms bit teeth, which crushes the rock at the bottom of the well. To prevent excessive wear, research has largely focused on the study and determination of abrasion-resistant materials. In our work, we investigated the wear mechanism of a roller cone drill bit whose wear-resistant teeth are protected by a hard metal coating welded onto the teeth. The difference between material properties of erosion-protective carbide coating and the tooth steel leads to uneven wear of bit teeth. In order to determine the material changes, we carried out detailed studies of the rock through which drilling was carried out, the drilling parameters and the materials of which the roller cone bit is made. The principle of wear of the tooth materials and their carbide coating, determined by our research, indicated the guidelines which could be basis for the development of abrasion-resistant materials could be carried out, as well as the problem of applying an erosion protection to the teeth of the studied type of roller cone bits. carbide coating erosion effect micro channel disintegration drilling true false true Angleški jezik Ni določen Članek v reviji 2022-05-04 09:00:23 2022-05-04 09:00:23 2022-09-15 04:13:52 0000-00-00 00:00:00 2021 0 0 15 str. iss. 11, art. 1308 Vol. 11 2021 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 622 2079-6412 10.3390/coatings11111308 83235075 coatings-11-01308.pdf coatings-11-01308.pdf 1 370ACD58D4F92F46A3FC6199D05D7476 9ef9b5c0659304f427a12697029f1a6f4acf2a64d4bb383edea4c20db646dc0b 66a05ea7-cb78-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156085 https://www.mdpi.com/2079-6412/11/11/1308 0 e9965ab1-cb77-11ec-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=156084 Naravoslovnotehniška fakulteta 0 0 0