Effect of Chromium on Hardness and Tensile Properties of Fe-0.35 wt% P Based P/M Alloys

摘要

High density Fe-P binary and Fe-P-Cr ternary alloys were made by hot powder preform forging technique. The hot forged preforms were hot rolled and annealed to relieve the residual stresses. These alloys were characterized in terms of microstructure, porosity content/densification, hardness and tensile properties. Microstructures of these alloys consist of single-phase ferrite only. Phosphorous causes more hardening of ferrite than chromium in solid solution with iron. It was observed in this present investigation that the alloying addition of Cr to Fe-P based alloys caused increase in strength associated with the reduction in ductility. Alloys developed in the present investigation were capable of hot/cold working to very thin gage of sheets.