Low-Stress Abrasive Wear Behaviour of a 0.2% C Steel: Influence of Microstructure and Test Parameters

摘要: A low (0.2%) carbon steel has been subjected to heat treatment form varying quantities of ferrite plus martensite in its microstructure. This was achieved by holding the samples two-phase (ferrite austenite) region at three different temperatures (750, 780, and 810 °C) for a specific duration followed quenching ice water. In another exercise, also annealing austenitizing 890 °C furnace cooling comparison purposes. The were low-stress (three-body) abrasion tests using an ASTM rubber wheel test apparatus speeds (150, 273 400 rpm corresponding linear 1.79, 3.26 4.78 m/s respectively) sliding distances fixed load 49 N. Crushed silica sand particles size ranging from 212 300 μm used as abrasive medium. wear rate decreased progressively with distance until (nearly) steady-state condition attained. considered be due abrasion-induced work hardening subsurface regions well greater tendency protrusion harder martensite/pearlite phase longer distances, thereby providing resistance wear. Decreasing increasing temperature 750–810 could attributed volume fraction hard containing martensite. lower observed case over annealed ones comprising pearlite higher bulk hardness former. Increasing speed 1.79 led increase rate. create deeper scratches scouping (digging). reduction further change mechanism predominantly rolling view increased plastic deformability characteristics specimens frictional heating. present investigation clearly suggests that it is possible attain desired combination microstructure (consisting martensite) leading optimum low-carbon steels. quantity two phases turn varied suitably controlling heat-treatment temperature.