Hot Rolling of Sendust Alloy in Relation to Alloy Composition and Magnetic Properties

Abstract

Deformability by hot rolling of Sendust alloy and magnetic properties of hot rolled sheets have been investigated as a function of composition of the alloy. With increasing silicon at a constant aluminum content, deformability decreases, while it is not changed by increasing aluminum at a constant silicon content. These results are qualitatively explained on the basis of mechanical tests at lower strain rates. Magnetic properties are improved by hot rolling, and especially the initial permeability is raised in the low frequency range. Molding and μ_i-temperature characteristics of cast and hot rolled Sendust are quite sensitive to composition. Segregation of alloying elements introduced during solidification is homogenized by hot rolling.