Microstructural evolution during austempering of a ASTM A-532 CLASS III type high chromium white cast iron undergoing abrasive wear

This paper studies the influence of variables such as holding temperatures and times during austempering of High Chromium White Cast Iron (HCWCI), with the following chemical composition: Cr 25 %, C 3 %, Si 0.47 %, Mn 0.74 % and Mo 1.02 %. The aim of the austempering was to modify the percentage of...

Szczegółowa specyfikacja

Opis bibliograficzny
Główni autorzy:	Higuera-Cobos, Oscar Fabián, Bucurú-Vasco, Jeison, Loaiza-Patiño, Andrés Felipe, Monsalve-Arias, Mónica Johanna, Mesa-Grajales, Dairo Hernán
Format:	Online
Język:	eng
Wydane:	Universidad Pedagógica y Tecnológica de Colombia 2017
Hasła przedmiotowe:	Austempered Retained austenite Abrasive wear High chromium white cast iron Chromium carbides Austemperado Austenita retenida Desgaste abrasivo Fundiciones al alto cromo Carburos de cromo
Dostęp online:	https://revistas.uptc.edu.co/index.php/ingenieria/article/view/7319

Opis
Streszczenie:	This paper studies the influence of variables such as holding temperatures and times during austempering of High Chromium White Cast Iron (HCWCI), with the following chemical composition: Cr 25 %, C 3 %, Si 0.47 %, Mn 0.74 % and Mo 1.02 %. The aim of the austempering was to modify the percentage of retained austenite and its correlation to abrasive wear resistance under different conditions.Microhardness tests, SEM-EDS and XRD were performed to determine mechanical properties, chemical composition, and type of carbides and microstructures present, respectively. The tests complied with the ASTM G-65 standard. Results showed that the best performance against abrasion was achieved for austempering at 450 ºC with holding time of 6 hours.