Factors Influencing Mechanical Properties of Sintered Steels: Density And Carbon Content
19th International Metallurgy & Materials Congress (IMMC 2018), İstanbul, Turkey, 25 - 27 October 2018, pp.774-777, (Full Text)
- Publication Type: Conference Paper / Full Text
- City: İstanbul
- Country: Turkey
- Page Numbers: pp.774-777
- Open Archive Collection: AVESIS Open Access Collection
- Istanbul University Affiliated: No
Abstract
Abstract
Powder metallurgy (PM) materials provide a cost efficient solution for a wide range of applications. As these materials and processes improve, they can be applied to components with tougher requirements. The mechanical properties of sintered materials depend mainly on the microstructure and density. Theoretical applicability of the experimental studies in this regard is not enough. The results of this study are obtained in mass production trials. The number of tested parts is more than usual. Sintered specimens having densities 6.9, 6.95, 7.0 g/cm3 were produced from 0.5 and 0.8 wt. % carbon added Ni-Mo-Cu alloyed powders. The influence of manufacturing parameters such as density and carbon ratios on the mechanical properties of the sintered steels was investigated. Specimens were sintered at 1120 °C under endothermic atmosphere for 25 minutes in an industrial sintering furnace. Mechanical properties (hardness and tensile strength) were measured. Results show the mechanical properties increased by increasing density and carbon contents. Effect of the increased density is more prominent on the properties than carbon additive. Also the open and closed porosity contents of the specimens were determined and the effect was discussed.
Keywords: Sintering, Density, Carbon content, Mechanical properties, Hardness