INFLUENCE OF HEAT TREATMENT PARAMETERS ON SOFTENING OF STEEL EN C45E

U okviru ovog rada proučavao se utjecaj parametara toplinske obrade (temperature i trajanja žarenja) na obradivost i tvrdoću čelika EN C45E. Nakon proučavanja literature izvršeno je planiranje pokusa na temelju kojeg su u laboratoriju pripremljeni uzorci (ukupno 14 uzoraka cilindričnog oblika) i toplinski obrađeni prema planu pokusa. Uzorcima je nakon toga mjerena tvrdoća i obradivost probnim rezanjem pomoću rezne pile. Dobiveni rezultati mjerenja su statistički obrađeni. Na temelju statističke analize konačno su doneseni zaključci.In this paper, the influence of heat treatment parameters (temperature and duration of annealing) on machinability and hardness of EN C45E steel was studied. After studying the literature, the planning of the experiment was performed, on the basis of which samples were prepared in the laboratory (a total of 14 samples of cylindrical shape) and heat-treated according to the plan of the experiment. The samples were then measured for hardness and workability by trial cutting using a cutting saw. The obtained measurement results were statistically processed. Based on statistical analyses, conclusion were finally drawn