{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-PRXIZ9R7/47fa9174-75cb-4bd9-a5cb-33181c884b6c/HTML","dcterms:extent":"27 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-PRXIZ9R7/87620205-07d2-4dba-80eb-1ff9db18e001/PDF","dcterms:extent":"1456 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:doc-PRXIZ9R7/0c361ff7-c0ea-4f73-b9d3-3563bf52d98b/TEXT","dcterms:extent":"26 KB"}],"edm:TimeSpan":{"@rdf:about":"1992-1999","edm:begin":{"@xml:lang":"en","#text":"1992"},"edm:end":{"@xml:lang":"en","#text":"1999"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:doc-PRXIZ9R7","edm:isNextInSequence":{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:doc-L7YQT2J5"},"dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/URN:NBN:SI:spr-QKUCN2BD"},{"@xml:lang":"sl","#text":"Kovine zlitine tehnologije"}],"dcterms:issued":"1995","dc:creator":["Leskovšek, Vojteh","Rodič, Alenka","Ule, Boris"],"dc:format":[{"@xml:lang":"sl","#text":"letnik:29"},{"@xml:lang":"sl","#text":"številka:3/4"},{"@xml:lang":"sl","#text":"8 strani"},{"@xml:lang":"sl","#text":"str. 397-404"}],"dc:identifier":["ISSN:1318-0010","COBISSID:6826","URN:URN:NBN:SI:doc-PRXIZ9R7"],"dc:language":"en","dc:publisher":[{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},{"@xml:lang":"sl","#text":"Železarna Jesenice"},{"@xml:lang":"sl","#text":"Železarna Ravne"},{"@xml:lang":"sl","#text":"Železarna Štore"}],"dc:subject":[{"@xml:lang":"sl","#text":"jeklo"},{"@xml:lang":"sl","#text":"trdota"},{"@xml:lang":"sl","#text":"vakuumska obdelava"},{"@xml:lang":"sl","#text":"žilavost"},{"@rdf:resource":"http://www.wikidata.org/entity/Q486802"}],"dcterms:temporal":{"@rdf:resource":"1992-1999"},"dc:title":{"@xml:lang":"sl","#text":"Influence of fracture toughness on vacuum hardened HSS| Vpliv lomne žilavosti na vakuumsko toplotno obdelano hitrorezno jeklo|"},"dc:description":[{"@xml:lang":"sl","#text":"Fractures, macro-chipping and micro-chipping are all effects by which curtting edges are destroyed. The ability of a steel to resist these phenomena is known as its toughness. HSS, however, possess an appreciable ductility, although the notched or even unnotched specimens tested in the pendulum test are not sensitive enough to discriminate between high and low levels of toughness. Therefore, it becomes important to use a method of testing which can detect small variations in ductility. To establish the fracture toughness, the round-notched tensile specimens with a fatigue crack at the notch root was used. Fatiguing was done in as soft annealed condition. After that, the vacuum heat treatment for the achievement of optimal working properties was carried out and the final testing was performed. Our experiments confirm that the correlation based on the round-notched tension test can be successfully used to calculate the critical fracture toughness. On the basis of the above-mentioned experimental results, we were able to compose a diagram which simultaneously scoops the technological parameters of vacuum heat-treatment, the mechanical properties and the micro structure of vacuum heat-treated HSS M2"},{"@xml:lang":"sl","#text":"Lomni, makrookruški in mikrookruški so vzrok propadanja rezilnih robov. Sposobnost jekla, da se upira tem pojavom, pa je poznana kot žilavost. Hitrorezno jeklo ima upoštevanja vredno duktilnost, četudi preizkušanci z zarezo ali celo brez zareze pri Charpyjevem preizkusu niso dovolj selektivni, med katere spada hitrorezno jeklo, je pomembno, da izberemo metodo preizkušanja, ki zazna že majhne spremembe duktilnosti jekla ter je selektivna in reproduktivna. Poleg standardnega načina deformacijskega stanja, uporabljamo tudi nestandardni način merjenja lomne žilavosti, s cilindričnimi nateznimi preizkušanci z zarezo po obodu. Problemi pri ustvarjanju razpoke v korenu zareze, so nas navedli na idejo, da metodo za določevanje lomne žilavosti s pomočjo cilindričnih preizkušancev z zarezo po obodu modificiramo. Doseženi rezultati so pokazali, da je modificirana metoda tudi dovolj selektivna. Osnovni namen modifikacije je, ustvariti razpoko kontrolirane globine v korenu zareze na mehko žarjenih cilindričnih preizkušancih z zarezo po obodu. Predpulzirane cilindrične preizkušance zatem vakuumsko toplotno obdelamo, temu pa sledi natezni preizkus. Na osnovi rezultatov dobljenih s pomočjo modificirane metode, smo uspeli na istem diagramu zajeti mehanske lastnosti, tehnološke parametre vakuumske toplotne obdelave in mikrostrukturo vakuumsko toplotno obdelanih preizkušancev iz hitroreznega jekla M2"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:doc-PRXIZ9R7","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:doc-PRXIZ9R7"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:doc-PRXIZ9R7/87620205-07d2-4dba-80eb-1ff9db18e001/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:doc-PRXIZ9R7/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:doc-PRXIZ9R7"}}}}