answers electrical steels

1. 1. Role of chemical element inmagneticproperty inelectrical steels?
2. Magneticpropertiesmeanspermeabilityandcore/ironlooses
3. Pure ironin sheetformandMagneticpropertiesmeanspermeabilityandcore/ironlooses
1. role of chemical element in magnetic property in electrical steels? not the
element having magnetic property.
i) has a largercontributiontodecreasingthe energyloss density.
ii) decreasingthe value of the magnetic induction
iii) useful fordesignersandmanufacturersasthe saturationinductioncan be maximized
and the energydensityminimized.
2) Magnetic properties means and permeability core /iron losses
3) Pure iron sheet form and the magnetic properties like losses or permeability...
The results have shown that for electric steel grades with content of (0.5-2.5) wt.% Si and (0.02-1.2) wt.%
Al, the magnetic induction varies between (1.6-1.7) T. and magnetic energy indicator between (40-80) mJ/kg.
The model has shown that the increase of aluminium content has a larger contribution to decreasing the
energy loss density. On the other hand, both alloying elements have similar contributions to decreasing the
value of the magnetic induction. Nevertheless, additional measurements in the central part of the area of the
(wt.% Si, wt.% Al) plane are required to strengthen the model accuracy.
This analysis is useful for designers and manufacturers as the saturation induction can be maximized and the
energy density minimized.
The grain size is an important quantity as it has been foundto have a direct influence on the energy losses.
With increased grain dimension, the energy required to overcome the lattice distortions present at grain
boundaries decreases and, therefore, the energy losses decrease [28]. For grain diameters above 1 mm the
energy reducing effect is reversed due to the eddy-currents generated by the moving domain walls [29, 30].