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Vorlesungsmitschrift bausoffkunde
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Eisen und StahlWS 2022/23
Dichte Stahl 7,85 kglchn
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Herstellung
Hochofenprozess
_____________________
Rohstoffe Eisenerz, Koks, (Kalkstein, Quarz...)
Zuschläge
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Reduktion Reduktion der Eisenoxid durch Rohstoff
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Endprodukte Gichtgase, Roheisen (Kohlenstoffgehalt:4-4,7%) Hochofenschlacke (Zementherstellung)
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Konverterverfahren
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Frischen Kohlenstoffgehaltreduzierten, durch Einblasen von Sauerstoff
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Endprodukte Stahl (Walzwerk), Stahlguss(Dieerei)
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Unterschiede Gusseisen und Stahl
Gusseisen Kohlenstoffgehalt 2M%, Formgebung durch gieen, sehr spröd
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Stahlguss Kohlenstoffgehalt 2My, Formgebung durch green
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Stahl Kohlenstoffgehalt,
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durch walzen, schmieden, ziehen
Formgebung
Stahl
Nachbehandlung Feuerverzinkung (Korrasionsschutz) erhöht stalqualität
_______________________________________________________________
->
Spannungsaban
Wärmebehandlung _______________________________________________________________
Erwärmen, schnelles Abkühlen, Anlass (langsames Wiedererwämen)
Härten des
=> Stahls
Kaltverformung höhere Streckgrenze
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Legierungen _______________________________________________________________
Beimischen von anderen Metallen zur Verbesserung der
Eigenschaften (z.B Chrom
↳Korrasionsschutz)
Benennung Baustahl
M
~Mindesstreckgrenze
Stahl EN 10025-2 - S - 355 J2 + AR -Gütegruppe Betonstabstahl DIN 488 – B 500 B – 200 - Stabdurch -
Buktilitätsklasse
messer
I ↓
Kerbschlagarbeit I
I
Regelwerck/ Mindeststreck
Beton
-
Norm greate Norm
(N/mm2)
Kaltverfestigt/ Naturhart
Die Merkblätter sind die essenziellen Grundlagen. Diese reichen nicht zum Bestehen der Klausur.
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