51 KB679 KB46 KB200020242011Jurči, Peterletnik:45številka:5str. 383-394ISSN:1580-2949COBISSID:879530URN:URN:NBN:SI:doc-5CFCSCRBenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijelomna žilavostmikrostrukturaorodna jeklatoplotna obdelavatrdnosttrdotaCr-V ledeburitic cold-work tool steels| Ledeburitna jekla Cr-V za delo v hladnem|Cold-work tool steels based on Cr-V alloying belong to the most important toolmaterials for large series manufacturing. To enable high production stability, the tools must withstand various types of degradation processes, concerning firstly plastic deformation and wear. Therefore, the materials should have a high hardness, tensile and/or compressive strength and wear resistance. On the other hand, the materials have to resist brittle fracture, e.g., they must exhibit sufficiently high impact toughness and fracture toughness. This paper deals with an overview of the heat-treatment procedures and surface engineering techniques suitable for Cr-V tool steels. The effect of each of them on the main mechanical properties is also demonstrated and discussed. As a typical example, P/M made from the Cr-V ledeburitic steel Vanadis 6 is presentedOrodna jekla za delo v hladnem legirana s Cr-V spadajo med najbolj pomembne materiale za orodja za delo v velikih serijah. Omogočajo veliko stabilnost proizvodnje in prenašajo različne procese degradacije zaradi plastične deformacije in obrabe. Zato morajo imeti visoko trdoto, raztržno in tlačno trdnost ter obrabno obstojnost. Po drugi strani morajo biti jekla dovolj odporna proti krhkemu lomu, kar pomeni, da morajo imeti tudi visoko udarno žilavost in žilavost loma. Članek je pregled postopkov toplotne obdelave in tehnologije površine, primernih za orodna jekla Cr-V, vpliv vsakega postopka pa je opisan in analiziran. Kot tipičen zgled, je obravnavano P/M ledeburitno jeklo Cr-V Vanadis 6TEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije