XXX. Lattice distortion and hardness of heat-treated tungsten magnet steels

Abstract

The changes in lattice distortion in tungsten magnet steels are followed as the steels are subjected to various heat treatments. It is found that the decrease in magnetic quality and hardness on heating about 900°C. is due to disappearance of lattice distortion, and that the recovery of these properties by heating at 1250°C. is due to re-introduction of the distortion. Lattice distortion is advanced as the main factor underlying the spoiling and recovery of this type of steel. It is further shown that the particular nature of the changes exclude possible complications arising from the deformation of grains by slip or the formation of submicroscopic crystals.