Effects of cooling rate upon annealing on the microstructure and properties of the FeCo49V2Nb0.2 alloy

Abstract

In this paper, the influence of heat treatment on the magnetic properties of permendur the FeCo49V2Nb0.2 alloy used as the rotor core of a generator is investigated. The as-cast alloy is forged, hot and cold rolled to a thickness of 0.2 mm. The alloy samples were annealed in an argon gas furnace at different cooling rates. The results of measuring properties using the vibrating sample magnetometer method and measuring hardness show that the cooling rate has a significant impact on the properties of the FeCo49V2Nb0.2 alloy. Combining X-ray diffraction analysis and microstructure analysis allows us to explain the changes in properties obtained. From the results obtained, a conclusion can be drawn about the appropriate cooling rate for this alloy to achieve the best magnetic properties.