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Title:Vpliv procesnih parametrov pri postopku thixsocasting na mikrostrukturo zlitine AlSi7
Authors:Rudolf, Rebeka (Author)
Križman, Alojz (Author)
Files:URL http://www.dlib.si/details/URN:NBN:SI:doc-O69509NE
 
Language:Slovenian
Work type:Not categorized (r6)
Typology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Abstract:Postopek thixocasting se uporablja za izdelavo nekaterih Al zlitin s posebnimi lastnostmi. Pri tem postopku se spremeni neugodna dendritna morfologija primarnih kristalov v globulitno. Uporablja se pri izdelavi proizvodov s tlačnim litjem , z utopnim kovanjem, pri izdelavi kompozitov, itd. Kot etapno nalogo pri izdelavi kompozitov na osnovi aluminijevih zlitin smo raziskovali vpliv procesnih parametrov (temperatura in hitrost mešanja) na velikost in obliko globulitnih zrn. V prispevku podajamo analizo mikrostrukture tako izdelane zlitine AlSi7. Rxziskave kažejo, da je globulitna mikrostruktura [alfa]-primarnih zmesnih kristalov močno odvisna od hitrosti mešanja in temperature v dvofaznem področju. Na končno mikrostrukturo tako izdelanega materiala pa vpliva tudi hitrost ohlajevanja s temperature dvofaznega področja do sobne temperature.
Keywords:livarstvo, tiksotropno ulivanje, AlSi zlitine, globulitna mikrostruktura
Year of publishing:1997
Publisher:Inštitut za kovinske materiale in tehnologije
Number of pages:str. 29-31
Numbering:Letn. 31, št. 1/2
UDC:621.74
ISSN on article:1318-0010
COBISS_ID:2917654 New window
NUK URN:URN:SI:UM:DK:3UMHJZF1
Views:802
Downloads:23
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Categories:Misc.
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Record is a part of a journal

Title:Kovine zlitine tehnologije
Shortened title:Kovine zlit. tehnol.
Publisher:Inštitut za kovinske materiale in tehnologije
ISSN:1318-0010
COBISS.SI-ID:31742209 New window

Secondary language

Language:Unknown
Abstract:Thixocasting is used to manufacture some Al alloys with special properties. With this process the undesired dendritic morphology of primary crystals changes to spheroidal. The obtained alloys are used for high pressure casting,die forging, manufacture of composites, etc. For composite manufacturing the influence of process parameters (temperature and stirring velocity) on the size and shape of the spheroidal grains was investigated. The paper deals with the microstructure analysis of AlSi7. The results show a strong influence of the mechanical stirring velocity and temperature in the semisolid on the spheroidal microstructure of primary [alpha] crystals. The microstructure also depends on the cooling velocity from semisolid to room temperature.
Keywords:casting, thixocasting, Al-Si alloys, spheroidal microstructure


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