Institute of Metals and Technology, Ljubljana (IMTLJ)
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Zaostale napetosti v plazma nitriranem jeklu za delo v vročem H11 = Residual stresses in plasma nitrided hot work tool steel H11Tandler, Marko ; Leskovšek, Vojteh ; Podgornik, BojanVzorci dimenzij [phi]24x10 mm, izdelani iz jekla za delo v vročem H11, so bili vakuumsko toplotno obdelani na izhodno trdoto 45,3 HRc in nitrirani v pulzirajoči plazmi pri različnih parametrih. ... Nitridne plasti smo preiskali z optičnim mikroskopom in ugotovili, da je na površini jekla faza - [delta]' (Fe[sub]4N) debeline od 2-6 [mu]m in pod njo ležeča difuzijska plast globine od 0,15-0,25 mm. Iz primerjave profila mikrotrdote in profila zaostalih tlačnih napetosti smo ugotovili, da ni enostavne korelacije med mikrotrdoto in zaostalimi tlačnimi napetostmi. Iz profila tlačnih napetosti vidimo, da so tlačne napetosti v obeh primerih povezane z globino nitriranja Nht. Pri manjši globini Nht je globina, na kateri dosežemo maksimalne tlačne napetosti bližje površini, prav tako pa tlačne napetosti prej preidejo v natezne, kot pri večji globini nitriranja. V obeh primerih je maksimum tlačnih napetosti dosežen na globini z mikrotrdoto okoli 850 HV[sub]0.1. Ugotovljeno je, da ni pomembne razlike pri doseženem maksimumu zaostalih napetosti glede na razlike v doseženi površinski mikrotrdoti HV[sub]0.1.Type of material - conference contributionPublish date - 2003Language - slovenian, englishCOBISS.SI-ID - 303018
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Tandler, Marko | 17081 |
Leskovšek, Vojteh | 07642 |
Podgornik, Bojan | 15269 |
Source: Personal bibliographies
and: SICRIS
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