The Effect Of Alloy Elements On The Texture And Deformation Of Fe-6.5wt%Si Electrical Steel

Abstract: It is well known that Fe-6.5wt %Si electrical steel is one kind of soft magnetic materials with higher relative permeability, lower coercive force and iron loss than those of conventional industrial silicon steel(Si content<4.5wt%).However, their room- temperature embrittleness and poor workability limit their practical applications in the industry.The influence of manganese, boron, niobium and niobium in combination with boron on microstructure and properties of the Fe-6.5wt %Si alloys was analyzed in this thesis. Micro hardness of the grains and the compressive properties of the 10-mm diameter cylinders of the alloys were investigated at room-temperature. It was found that the addition of manganese caused coarsening of grains, which reduce compressive failure strain of the alloys. Boron had no effect on reducing the grain size, and no positive effect of adding boron was observed on improving compressive failure strain of the alloys. Above a critical content, niobium, when used in niobium combination with boron caused reduction in the grain size and improved ductility for alloys studied.