katedra: KMT; přílohy: 1 CD ROM; rozsah: 55In the thesis the modification of surface through thermal-chemical treatment on final elements of MQ 200 gear box to carry out the analysis of possibility to replace the carbonitriding with sulfonitriding process is undertaken. In the theoretical part the typical processes of thermal-chemical treatments and the wear model arising during machine elements' mating are described. There is also the evaluation of sulfonitriding from technical, economical and ecological point of view brought up. In the experimental part the characteristics of obtained layers by using of following testing techniques: optical microscopy, X-ray microanalysis, microhardness measurements and tribological tests using the Pin-On...