Initial Assessment of Abrasive Wear Resistance of Austempered Cast Iron with Vermicular Graphite

• Main Authors: Soiński M. S., Jakubus A.
• Format: Article
• Language: English
• Published: Polish Academy of Sciences 2014-10-01
• Series: Archives of Metallurgy and Materials
• Subjects: silica sand; patternless process; cutting parameters; gypsum
• Online Access: http://www.degruyter.com/view/j/amm.2014.59.issue-3/amm-2014-0183/amm-2014-0183.xml?format=INT

The work compares the abrasive wear resistance of cast iron containing vermicular graphite, measured in the as-cast state and after austempering carried out at 290°C, 340°C, or 390°C. Theexaminations were performed by means of the T-01M tribological tester using the pin-on-disc configuration. Specimens used for examinations were taken from the end tabs of the tensile specimens, these being cut out of the test walls of the double-leg keel block test castings. Examinations proved that the austempering process increases the abrasive wear resistance of vermicular cast iron by several times as compared with the as-cast material. A tendency for a slight decrease in abrasive wear with an increase in austempering temperature can be stated. The coefficient of friction took a little higher values for cast iron after thermal treatment than for the as-cast material. The work was completed with roughness examination by means of electron scanning microscopy.