Growth stages and hexagonal-rhombohedral structural arrangements in spheroidal graphite observed in ductile iron
نویسندگان
چکیده
منابع مشابه
Graphite Phase Formation in Al Alloyed Ductile Irons
The influence of aluminum, within the range of 0.08 - 6.16 wt.%, on the microstructure and hardness of as-cast ductile cast iron has been studied. A number of irons of different composition have been made by green sand casting and gravity die casting of appropriate design to provide the experimental materials. It has been found that Al addition and higher cooling rates in permanent mould castin...
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Graphite crystallizes in both hexagonal (2H) and rhombohedral (3R) systems. It is known that the 3R modification in graphite occurs locally by grinding of 2H crystal, and disappears by annealing at high temperature or decomposition of its intercalation compounds [Boehm 1955]. It was reported that the 3R phase content in artificial graphite, which was estimated from the integrated intensities of...
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M. Górny, R. Dańko, M. Holtzer. AGH University of Science and Technology, Faculty of Foundry Engineering, Kraków, Poland This article addresses the effect of mold filling and wall thickness on the flake graphite layer in ductile iron. The research was conducted for castings with different wall thickness (3-8 mm) and using molding sand with furan resin. A thermal analysis has been performed alon...
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The influence of post-inoculation and of cerium and antimony additions on the solidification process and on the formation of chunky graphite in ductile iron heavy-section parts have been studied previously in the case of near-eutectic alloys. It appeared of interest to complement these works by analysing the effect of carbon equivalent on graphite degeneracy. In the present work, hypo-, hyperan...
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The effect of heat treatment and alloying elements of copper and tin on the microstructure and mechanical properties of austempered ductile cast iron alloys is investigated. The austenitizing temperature of 890°C, the isothermal transformation (austempering) temperatures of 285, 335 and 375°C, and austempering times of 15, 30, 75 and 150 minutes are studied. The alloying elements of copper and ...
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ژورنال
عنوان ژورنال: Carbon
سال: 2017
ISSN: 0008-6223
DOI: 10.1016/j.carbon.2017.01.063