Modeling of alloy composition and TMT on magnetic properties of Fe-28Cr-15Co-1Si alloy

In this work, the effects of the alloy composition in a Fe- 28Cr-15Co-1Si permanent alloy on the magnetic properties of the prepared alloys were evaluated. The study not only paid particular attention to the concentration and type of additive (Mo and Ti) but also investigated the effect of thermomagnetic treatment temperature. A user-defined design related to response surface methodology was applied to model the effect of the mentioned parameters and optimize the magnetic performance. Two models fitted with experimental data obtained from Br and Hc measurement. The optimum conditions were determined at T = 645 °C with 3% Mo. According to the derived models, this formulation would give a Magnetic alloy with a magnetic parameters of, Hc = 18.15 kA m−1 and Br = 0.87 T during TMT treatment. The magnetic properties of sample in optimum condition after step aging obtained as Br = 0.98 T and Hc = 67.66 kA m−1.