Influences of Cold Rolling and Annealing on Orientations of Recrystallization Nuclei and Grain Growth in Invar Alloy

Abstract

Synopsis : Fe-36Ni(Invar) steel sheet is used for shadow masks in color cathode ray tubes. For using shadow masks, it is necessary to obtain a low yield strength, high r-value and excellint etching property after annealing. So, nuclei orientations of recrystallization, and grain growth of invar alloy were studied by transmission electron microscopy (TEM). The results are as follows :( 1 )In case of cold rolling with light cold rolling reduction and annealing, nuclei orientations of recrystallization are mainly ( 011) and ( 011) nuclei orientations have matrices of (011) orientation.( 2 )In case of cold rolling with heavy cold rolling reduction and annealing, nuclei orientations of recrystallization are mainly ( 011) and ( 011). Both orientations have matrices of (011) orientation.( 3 )The grains of (011) orientation in sample with heavy cold rolling reduction are increased with progressing annealing.