DETERMINATION OF FREQUENCY FACTOR AND ACTIVATION ENERGY FOR BORONIZING OF C15 STEEL

U teorijskom dijelu rada objašnjeni su osnovni pojmovi boriranja, osnovni mehanizmi i zakoni difuzije, te teorijske osnove kristalne građe metalnih materijala. U eksperimentalnom dijelu rada provedenom u laboratoriju Strojarskog fakultera u Slavonskom Brodu proveden je postupak boriranja na čeliku C15 te su izmjerene debljine boridnih slojeva. Na osnovu izmjerenih vrijednosti te uz primjenu klasične kinteičke teorije određeni su aktivacijska energija i faktor frekvencije te je dobiven izraz za računanje vrijednosti debljine boridnog sloja ukoliko su poznati podaci temperature i trajanja boriranja.In the theoretical part of the paper, the basic concepts of boronizing, basic mechanisms and diffusion laws and the theoretical basis of crystal structure of metal materials are explained. In the experimental part of the work which has been carried out in the laboratory of the Faculty of mechanical engineering in Slavonski Brod, a process of boronizing of steel C15 was performed and the thickness of the boride layers was measured. Based on the measured values and using the classical kinetic theory, the activation energy and frequency factor were determined and an expression was obtained for the calculation of the thickness of the boride layer if the temperature and duration of the boronizing process are known