Material for aperture grill for color picture tube, process for making the same,aperture grill, and picture tube

摘要

A material for an aperture grill for a color picture tube having excellent yield and high-temperature creep strengths and magnetic characteristics superior to those of the existing material; a process for making the material; an aperture grill; and a picture tube having the aperture grill assembled therein. A low-carbon steel sheet containing 0.05 to 2.5 wt.% of Cu, or 0.05 to 2.5 wt.% of Cu and 0.001 to 0.4 wt.% of P is cold rolled and then aged at 300 to 700 DEG C, or cold rolled, intermediately annealed at 500 to 800 DEG C, secondarily cold rolled, and then aged.