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Stal dwufazowa
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ISBN10: 6200757585
ISBN13: 9786200757586
Publisher: Wydawnictwo Nasza Wiedza
Published: Jul 26 2025
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Polish
ISBN13: 9786200757586
Publisher: Wydawnictwo Nasza Wiedza
Published: Jul 26 2025
Pages: 80
Weight: 0.26
Height: 0.19 Width: 6.00 Depth: 9.00
Language: Polish
Niniejsza praca przedstawia charakterystykę mikrostrukturalną i ocenę wlaściwości mechanicznych stali o różnych mikrostrukturach dwufazowych, uzyskanych poprzez hartowanie stali ferrytyczno-perlitowej klasy LNE 500. Jej obszar międzykrytyczny i istniejące fazy, w zależności od temperatury, zostaly określone za pomocą oprogramowania THERMOCALC. Na podstawie tych wyników próbki zostaly hartowane w różnych temperaturach w celu uzyskania różnych frakcji objętościowych ferrytu i martenzytu. Charakterystykę mikrostrukturalną przeprowadzono za pomocą metalografii jakościowej i ilościowej. Wlaściwości mechaniczne zostaly określone za pomocą badań twardości, udarności i rozciągania jednoosiowego, które dostarczyly parametrów takich jak naprężenie plynięcia, granica wytrzymalości na rozciąganie oraz calkowite i równomierne wydlużenie, a także wykladnik utwardzenia i wspólczynnik wytrzymalości stali poddanej obróbce. Wyniki wykazaly, że obróbka cieplna hartowania spowodowala powstanie różnych mikrostruktur. Większa obecnośc fazy martenzytycznej przyczynia się do poprawy wlaściwości mechanicznych stali hartowanej, takich jak twardośc, energia pochlaniana przez uderzenie i wytrzymalośc mechaniczna bez utraty plastyczności.
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