International Conference on Advanced Materials Science & Engineering and High Tech Devices Applications; Exhibition (ICMATSE 2020), Ankara, Türkiye, 2 - 04 Ekim 2020, ss.120-124
Production of High Carbon Powder Metallurgy specimens, ATOMET 1001 pure iron powders produced by
atomization method and 1.5% by weight graphite powder as a carbon source were mixed and then pressed in a single
action press with 700 Mpa pressure. The pressed specimens were then sintered in Ar atmosphere in the atmosphere
controlled furnace to produce high carbon powder metal steel with a rate of 1.5% carbon. Firstly, specimens were
austenitized at 950 °C for 4 minutes and martempering heat treatment was applied in a neutral salt bath with a
temperature of 350 °C - 400 °C for different periods. It was observed that the hardness decreased due to the decrease in
martensitic regions in the microstructure with increasing martempering times.
Keywords: Powder Metallurgy Steel, Martempering, Bainite, Martensite.