Abstract
Spheroidal graphite cast iron is one of the most favorable materials in cast iron family due to its wide range of mechanical and tribological properties. In the current research priority is given towards the investigation of wear system response of spheroidal graphite cast iron subjected to various heat treatment conditions. Pearlitic/ferritic and upper bainitic matrix was obtained through normalizing and austempering treatment for an austenitizing temperature of 1000°C. Dry sliding wear test was performed at 10N, 20N, 30N for a sliding distance of 7.54m. With increase in load weight loss was observed for as-cast specimen whereas normalized specimen showed very less weight loss with increasing load. On the other hand the austempered specimen observed to lose weight when operated at 10N, whereas at 20N and 30N drastic gain in weight was observed.
Highlights
Spheroidal graphite cast iron has gained its reputation in structural, automotive, agriculture and many other industries due to its good mechanical and tribological properties
It was reported in their result that one of the major constituent of the austempered iron, i.e., bainitic ferrite, which is less prone to thermal instability than martensite, might undergo strain hardening during wear resulting in an increased hardness
It was found that normalized specimen having pearlitic/ferritic matrix had highest and austempered specimen with upper bainitic matrix had the lowest hardness value among all the three specimens
Summary
Spheroidal graphite cast iron has gained its reputation in structural, automotive, agriculture and many other industries due to its good mechanical and tribological properties. The wear rate in both the specimen was found to be increasing with increase in sliding distance It was reported in their result that one of the major constituent of the austempered iron, i.e., bainitic ferrite, which is less prone to thermal instability than martensite, might undergo strain hardening during wear resulting in an increased hardness. The present investigation is concentrated to study the wear behavior of as-cast pearlitic/ferritic ductile iron compared with higher amounts of pearlite in normalized and upper bainitic austempered ductile iron subjected to dry sliding condition
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