Mechanisms of extrusion wear of medium carbon steel

摘要

This study investigated extrusion wear mechanisms and transition of wear mechanisms of medium carbon steel by using a pin-on-disc configuration and micro-analyzing the wear surfaces. In an extrusion wear condition, layers of material on the contact surface of the tested pin were extruded continuously from the interface. Under such a condition, the oxides, mainly Fe₃O₄ and FeO, on the pin contact surface were very thin at about 2 μm, and likely generated during cooling in air after the wear test. The microstructure of the pin very close to the contact surface was fine pearlite, which was transformed from austenite at the end of the wear test. Compared with the microstructures of the same medium carbon steel cooled in air from a melting state, the debris collected from extrusion wear tests had a fine pearlite structure instead of coarse pearlite and ferrite. Thus, the real contact temperature in extrusion wear did not reach the melting point of medium carbon steel. Such changes of microstructures cannot be found in other types of wear.View full textDownload full textKeywordsextrusion wear, oxidational wear, sliding, scanning electronRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/02533839.2011.591556