Fe-Ni-Co ALLOY THIN STRIP FOR SHADOW MASKS HAVING HIGH STRENGTH AND LOW THERMAL EXPANSION COEFFICIENT, ALONG WITH EXCELLENT MAGNETIC PROPERTIES

摘要

It provides an Fe-Ni-Co-based alloy having a low thermal expansion coefficient which combines both high strength and excellent magnetic properties.; Ni: 30~35%, Co: 2~6%, Nb: 0.1~0.4%, Mn: 0.2~0.5%, the balance Fe and unavoidable impurities is made of, among unavoidable impurities, C: 0.005% or less, S: 0.002 % or less, N: 0.005% or less, crystal grain size prior to etching the punched JIS G is determined from 7.0 to 10.0 with a particle size number defined in the 0551, precipitate of 0.2㎛~5㎛, through the total 0.5㎍ / ㎜ ³ ~ of the volume by a 1.5㎍ / ㎜ ³ it is a high strength can be obtained magnetic properties are excellent and also the low thermal expansion coefficient of the shadow mask Fe-Ni-Co-based alloy for keeping the thin ribbons.