THE POSSIBLE APPLICATION OF SPRAYED LAYERS TO EXTEND THE USEFUL PARTS AND EQUIPMENT

Svojstva površinskih slojeva strojnih dijelova i alata veoma često određuju njihovu vrijednost jer ona presudno utječu na trajnost u eksploataciji, a time i na ekonomičnost primjene. Iz tog se razloga posvećuje sve veća pažnja inženjerstvu površina i tehnologijama površina. U ovom diplomskom radu ukratko su opisane metode oplemenjivanja površina s glavnim osvrtom na toplinsko naštrcavanje. Toplinsko naštrcani slojevi koriste se za zaštitu materijala od mehanizama trošenja s ciljem produljena vijeka trajanja i otpornosti na koroziju. U eksperimentalnom dijelu rada opisane su tvrdoće, mikrostruktura i kemijski sastav dvije prevlake AISI 431 i Fe-Mo-Al nanešene postupkom plamenog naštrcavanja, a kao osnovni materijal korišten je 42CrMo4 .The properties of surface layers of machine parts and tools often determine their value because they have a crucial effect on durability in exploitation and therefore on the economy of application. For this reason, paying attention to the surface engineering and surface technologies is increasing. In this graduate thesis, the methods of surface finishing with the main focus on thermal spraying are briefly described. Heat-sprayed layers are used to protect materials from wear mechanisms to extend durability and corrosion resistance. In the experimental part of the thesis, described are the hardness, microstructure and chemical composition of the two coatings AISI 431 and Metco 350NS that were carried out using the flame spraying method and 42CrMo4 was used as a base material