Abstract
To determine the effect of austenite stabilizer element on the microstructure and behaviour of as–cast high Cr white cast iron Fe-21Cr-3Ni-1.7Mo-2.4C, different percentages of Mn (0.4, 0.9, 1.3, 1.7, 2.2 and 2.6 wt%) were added. Detailed investigations were carried out using scanning electron microscopy, energy dispersive spectroscopy analysis (EDS), X-ray diffraction and hardness test. It showed that with increasing Mn addition, the austenite phase (γ) of the as-cast alloys refine clearly. The morphology of the austenite phase for all alloys is a mixture of dendrite and plate like. The austenite phase refines clearly with increasing manganese addition. The major carbide phase formed in the as- cast alloys is M7C3 with minor carbides of (Fe,Cr)23C6 and Mo2C. Microstructure analysis showed the presence of small amounts of martensite and delta ferrite in all as-cast alloys. The hardness was decreased continuously with increasing Mn content. This is mainly attributed to the morphology of carbides rather than to small variation in carbides content. It was observed that considerable amounts of Mn were found in the carbides lower than that in the austenite matrix.
Highlights
High alloyed chromium cast irons were used in applications with extreme demanding requirements such as abrasive, erosion, heat and corrosion resistance (Carpenter, Carpenter and Pearce, 2004; Komarov, Sadovski, Urbanovich and Lifshits, 2002)
High chromium white cast irons are usually produced as hypoeutectic composition, with austenite dendrites, either partially or substantially transformed to martensite and eutectic containing carbides and austenite
They compose of primarily proeutectic austenite dendrites and eutectic which consists of eutectic austenite and eutectic carbides
Summary
High alloyed chromium cast irons were used in applications with extreme demanding requirements such as abrasive, erosion, heat and corrosion resistance (Carpenter, Carpenter and Pearce, 2004; Komarov, Sadovski, Urbanovich and Lifshits, 2002). These cast irons were employed with unusual physical properties, such as low thermal expansion or non magnetic properties are desired (Ogi, Yamomoto and MiyaKawat, 2003; Chenje, Simbi and Navara, 2006; Tabrett and Sare, 2000).
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
