|About this Abstract
||Materials Science & Technology 2011
||Processing, Microstructure and Properties of Cast Irons and Cast and Forged Specialty Steels
||Wear Behavior of Cu Alloyed Austemepered Ductile Iron
||Uma Batra, J D Sharma, Nimish Batra
|On-Site Speaker (Planned)
An investigation was carried out to examine the influence of austempering temperature on structural parameters and wear behavior of austemepered ductile iron. Ductile iron was austenitised at 850oC for 120 minutes and subsequently austemepered for 60 minute at three austempering temperature of 270, 330, and 380oC. Resulting microstructures were characterized through optical microscopy and X-ray diffraction. Wear test was carried out using pin-on-disc machine with a sliding speed of 500m min-1. Coarse ausferrite microstructure exhibited higher wear rate than fine ausferrite microstructure. At high austempering temperature, large volume fraction of austenite caused improvement in wear resistance through formation of deformation induced martensite. Study of wear surface using scanning electron microscope (SEM) revealed that, under dry sliding condition, wear occurred mainly due to adhesion and delamination. Wear rate is dependent on the yield strength, austenite content and its carbon content.
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