Effect of 0·5 mass Cu Addition on Ductility and Magnetic Properties of Fe-6·5Si Alloy

摘要

The effect of adding 0·5 mass% Cu on ductility and magnetic properties of Fe-6·5Si (mass%)alloy was investigated.The alloys with and without 0·5 mass% Cu addition were warm rolled into thin sheets of thickness no more than 0·3 mm at temperature below 600 ℃.It was found that the alloy with 0·5 mass% Cu addition was more easily warm rolled than Cu-free alloy.Tensile tests were carried out to further investigate this phenomenon,which confirmed that the ductility of the alloy with 0·5 mass% Cu addition was significantly higher than that of Cu-free al-loy at 550 ℃.Based on the results of transmission electron microscopy analysis,the ductility increase of the alloy with 0·5 mass% Cu addition was attributed to the effect of Cu on the promotion of dynamic recovery and suppression of long-range order in the alloy during warm rolling process.It was also observed that the iron loss was lower and in-ductance was higher for the alloy with 0·5 mass% Cu addition.Thus,it can be concluded that adding a suitably small amount of Cu would not only increase the ductility of Fe-6·5Si alloy at warm rolling temperatures but also im-prove its magnetic properties.