Influence of microstructure on mechanical properties of molybdenum alloyed P/M steels

Complex effects of alloy composition and porosity on the phase transformations and mechanical properties of powder metallurgy steels

“…For low-alloy P/M steels, which have great potential for use in powertrain components, Cr and Mo have extensively been employed to improve the mechanical and wear properties [11][12][13][14][15][16][17][18][19][20][21]. The presence of Cr may induce solution hardening and carbide precipitation and can further increase the response to thermal processes, thereby enhancing the impact toughness and tensile strength [11][12][13].…”

“…The presence of Cr may induce solution hardening and carbide precipitation and can further increase the response to thermal processes, thereby enhancing the impact toughness and tensile strength [11][12][13]. The addition of Mo can also improve the tensile strength by promoting bainitic phase transformation and, moreover, minimize dimensional changes of the final specimen after sintering [14,15]. Furthermore, these alloying elements, which are used as ferrite stabilizers and carbide formers, have the potential to produce high-strength phases by retarding the continuous cooling transformation (CCT) curve [16,17].…”

Effect of molybdenum addition on the mechanical properties of sinter-forged Fe–Cu–C alloys

“…Maximum hardness (50-55 HRC) was obtained for water quenched condition while least was observed for furnace cooled condition (33)(34)(35)(36)(37)(38)(39)(40). Beyond 1.5wt% Mo addition, no significant increase in hardness was observed.…”

“…Addition of Mo provides solid solution strengthening and mechanical properties were reported to increase in both as sintered and heat treated state [30][31]. H. higher carbon content and at high sintering temperature [37]. J. Wang and H. Danninger showed that the wear behaviour of Fe-3.5%Mo-1.0%C steels depends on the PM processing parameters, heat treatment as well as on the wear conditions [38].…”

Aceros sinterizados al Mo con gradiente funcional

“…Las posibilidades y calidades de los aceros sinterizados son muy numerosas, entre estos, destacan aquellos que proporcionan mejores propiedades mecánicas y mejores tolerancias dimensionales, como pueden ser los aceros sinterizados al molibdeno (Tengzelius, 2005). Además, estos aceros pueden incrementar sus interesantes propiedades con tratamientos térmicos (Torralba et al, 1995b, Candela et al, 2005.…”