TOOL MATERIALS AND TOOLS PRODUCED BY SPECIAL PROCEDURES

U ovom radu je opisano općenito o alatnim materijalima i alatima koji su proizvedeni posebnim postupcima, o njihovim svojstvima te primjerima primjene za određenu skupinu materijala. Prvim dijelom prikazana su tri postupka lijevanja alata, razlike u tim postupcima, različita mehanička svojstva i mogućnosti primjene. U drugom dijelu rada priča se temelji na postupku sinteriranja, alatima koji su dobiveni tim postupkom, njihovim mogućnostima te na opisivanju sinteriranih tvrdih metala i njihovoj podjeli. Treći dio pokazuje razliku triju tvrdih metala: WC-Co, WC-TiC-Co, WC-TiC-TaC-Co; njihove primjene te značajke karbida i kobalta za njihova svojstva. Četvrtim dijelom opisuje se značenje keramike kao alatnog materijala, njene prednosti spram alatnih čelika, te razlika između dvije najvažnije podskupine: oksidne keramike i neoksidne keramike. Peti dio pokazuje glavna dva predstavnika neoksidne keramike, silicijev i natrijev karbid, te njihova svojstva i primjenu.This work is generally about tool material and tools which are produced by special procedures, about their properties and examples of application for a particular group o materials. The first part displayed three procedures of casting tools, differences in that procedures, different mechanical properties and application possibilities. In second part story is based on the process of sintering, tools that have been obtained with that process, their possibilities and on describing sintered hard metals and their classification. The third part show differences of three type of hard metals: WC-Co, WC-TiC-Co, WC-TiC-TaC-Co; their applications and features of carbides and cobalt for their properties. The fourth part describes meaning of ceramics as a tool material, its advantages over tool steels and differences between the two most important subgroups: oxide ceramic and non-oxide ceramic. The fifth part shows the two main representatives of non-oxide ceramics: silicon carbide and sodium carbide, their properties and applications