| 摘要 |
PURPOSE:To manufacture shadow mask having good press formability and superior resistances for buckling and resonance, by cold rolling iron base alloy having a specified compsn. composed mainly of Fe-Ni-Cr finally by high draft. CONSTITUTION:Iron base alloy composed of <=0.10wt% C, <=0.30% Si, <=0.30% Al, 0.1-1.0% Mn, 30-45% Ni, 2.0-10.0% Cr, if necessary further 0.01-1.0% of >=1 kind among Ti, Zr, Mo, Nb, B, V, Be, and the balance Fe with inevitable impurities is cold rolled finally by >=20% draft, to obtain shadow mask material having good press formability, high stiffness and superior resistances for buckling and resonance. In said method, before the final cold rolling, the alloy is cold rolled by >=40% draft, or without said rolling, next, grain size is controlled to >=7.0 size number by annealing, thereby, press formability can be further improved. |
