Fe-Ni BASED ALLOY FOR PRESS FORMING DIE FLAT MASK AND FLAT MASK AND COLOR CATHODE-RAY TUBE USING THE SAME

摘要

PROBLEM TO BE SOLVED: To develop an Fe-Ni based alloy for a press forming die perfect flat mask improved in strength (falling impact deformation resistance) and having low thermal expansibility.;SOLUTION: This Fe-Ni based alloy for a press forming die perfect flat mask maintaining low thermal expansibility, and whose proof stress and Young's modulus are improved as well has a composition containing 33 to 37% Ni and 0.001 to 0.1% Mn, voluntarily containing 0.01 to 2% Co and further containing one or more kinds selected from 0.01 to 0.8% Nb, 0.01 to 0.8% Ta and 0.01 to 0.8% Hf by 0.01 to 0.8% in total, and the balance Fe with inevitable impurities, in which, preferably, as the impurities, C is controlled to ≤0.01%, Si to ≤0.04%, P to ≤0.01%, S to ≤0.01% and N to ≤0.005%. The flat mask and color cathode-ray tube use the same.;COPYRIGHT: (C)2002,JPO