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Tribological behavior and characterization of borided cold-work tool steel = Tribološko vedenje in karakterizacija boriranega orodnega jekla za delo v hladnemGunes, IbrahimIn the present study, tribological and characterization properties of the borides formed on cold-work tool steel were investigated. Boriding was performed in a solid medium consisting of Ekabor-II ... powders at 850 °C and 950 °C for 2 h and 6 h. The boride layer was characterized with light microscopy, X-ray diffraction technique and a micro-Vickers hardness tester. An X-ray diffraction analysis of the boride layers on the surface of the steel revealed the existence of FeB, Fe2B, CrB, Cr2B and MoB compounds. Depending on the chemical compositions of the substrates and the boriding time, the boride-layer thickness on the surface of the steel ranged from 13.14 micro m to 120.82 micro m. The hardness of the boride compounds formed on the surface of the steel ranged from 1806 HV0.05 to 2342 HV0.05, whereas the Vickers-hardness value of the untreated steel was 428 HV0.05. The wear tests were carried out in a ball-disc arrangement under a dry friction condition at room temperature with an applied load of 10 N and with a sliding speed of 0.25 m/s at a sliding distance of 1000 m. The wear surfaces of the steel were analyzed using SEM microscopy and X-ray energy-dispersive spectroscopy (EDS). It was observed that the wear rate of the unborided and borided cold-work tool steels ranged from 11.28 mm3/(N m) to 116.54 mm3/(N m).Source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 48, št. 5, sep.-oct. 2014, str. 765-769)Type of material - article, component part ; adult, seriousPublish date - 2014Language - englishCOBISS.SI-ID - 1097130
Author
Gunes, Ibrahim
Topics
cold-work tool steel |
boriding |
tribological properties |
microhardness |
friction coefficient |
orodno jeklo |
boriranje |
tribološke lastnosti |
mikrotrdota |
koeficient trenja
source: Materiali in tehnologije = Materials and technology. - ISSN 1580-2949 (Letn. 48, št. 5, sep.-oct. 2014, str. 765-769)
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