Production of a strip made from an iron-nickel alloy, used for shadow masks in flat monitors and TV screens, comprises continuous or batch-type annealing a strip made from an iron alloy containing nickel, molybdenum and chromium

摘要

The invention relates to a method for producing a strip from an iron-nickel alloy for tensioned shadow masks used in flat monitors and display screens, whereby the strip comprised of a chemical composition (in mass %) 35-38 % Ni, 0.4-0.8 % Mo, 0.1-0.3 % Cr, 0.08-0.12 % C, max. 1 % Mn, max. 1 % Si, max. 1 % Nb, the rest being Fe and production-related impurities is subjected, after being cold rolled to a final thickness, to a continuous annealing or batch annealing within a preset temperature range, during which the coercive field strength Hc directly assumes the lowest value after its steep decrease and remains essentially unchanged when the annealing temperature is increased.