期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：5
页码：12259
出版社：S&S Publications
摘要：The spheroidal graphite iron (ductile iron) is kno wn for its good elongation (ductility) property at casting process at the part of low tensile strength. If the SGI is to produce good tensile strength, the elongation is gradually decreases. So an experimental research was conducted b y chemical composition (high percentage of Cu) to improve the tensile strength, hardness as well as elongation together with the variatio n of austempering temperature and different time period. The variables, austempering temperature were varied fro m 250 0 C to 300 0 C and for holding time period of 10, 20 and 30 minutes. The results of experiments showed that with an increase of austempering temperature and time, the tensile strength and hardness decreases whereas the elongation increases.
