Effect of Manganese Addition and Sintering Conditions on Mechanical Properties of Low Carbon 3Cr Prealloyed Steels
Mechanical properties, microstructure and fracture of Fe-3Cr-0.5Mo-xMn steels sintered laboratory at 1250°C and industrially at 1180°C, and of Fe-3Cr-0.3Mo-0.3V-xMn steels laboratory sintered at 1200°C are presented; all steels with 0.24% C. The highest tensile strength of 806 and 856 MPa attained the steels with 2% Mn based on Fe-3Cr-0.5Mo powder and of 929 MPa the Fe-3Cr-0.3Mo-0.3V-1.5Mn-0.24C steels. Linear increase of hardness and relatively linear decrease of impact energy in dependence on Mn addition was recorded. Tested steels exhibited lower heterogeneity of the microstructures. The fracture of steel containing vanadium with 2% Mn showed more metallic inclusions adversely affecting the strength properties.
Ionel Chicinaş and Liviu Brânduşan
A. Šalak and M. Selecká, "Effect of Manganese Addition and Sintering Conditions on Mechanical Properties of Low Carbon 3Cr Prealloyed Steels", Materials Science Forum, Vol. 672, pp. 55-58, 2011