| 摘要 |
PROBLEM TO BE SOLVED: To obtain an alloy which is suitable for an alloy sheet for an electron gun electrode without causing any drawing cracks even in recent more severe drawing process. SOLUTION: This Fe-Cr-Ni alloy has a composition containing, by weight, 15 to 20% Cr, 9 to 15% Ni, <=0.12% C, 0.005 to 1.0% Si, 0.005 to 2.5% Mn, <=0.03% P, 0.0003 to 0.0100% S, <=2.0% Mo, 0.001 to 0.2% Al, <=0.005% O, <=0.1% N, <=0.1% Ti, <=0.1% Nb, <=0.1% V, <=0.1% Zr, <=0.05% Ca and <=0.02% Mg, and the balance Fe with inevitable impurities. When the Fe-Cr-Ni alloy is rolled into a sheet having a thickness of 0.1 to 0.7 mm, in the surface layer, the number of inclusion groups ranged in a width of 10 to <20μm and in a length of >=20μm is <=20 pieces/mm2, and also, the number of inclusion groups ranged in a width of >=20μm and in a length of >=20μm is <=5 pieces/mm2.
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