Rezalna orodja, merilna orodja, kalupi itd., ki se uporabljajo v mehanski proizvodnji, morajo imeti zadostno trdoto, da zagotovijo njihovo delovanje in življenjsko dobo. Danes se bom z vami pogovarjal o temi "trdota".
Trdota je merilo sposobnosti materiala, da se upre lokalnim deformacijam, zlasti plastičnim deformacijam, vdolbinam ali praskam. Običajno je trši material, boljša je njegova odpornost proti obrabi. Na primer, mehanske komponente, kot so zobniki, zahtevajo določeno stopnjo trdote, da zagotovijo zadostno odpornost proti obrabi in življenjsko dobo.
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