Shadow mask sheet, method of producing same and cathode ray tube

Details Shadow mask sheet, method of producing same and cathode ray tube Shadow mask sheet, method of producing same and cathode ray tube

1993-04-27

1995-03-07

Brinich, Stephen

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

C22C 3808

Patent

active

053961463

ABSTRACT:
The shadow mask sheet having excellent etchability and made of an Fe-Ni invar alloy consisting essentially of 30-40 weight % of Ni, the balance being substantially Fe and inevitable impurities, having a percentage of {100} texture of 85% or more in a rolled surface and a fibrous microstructure in a transverse cross section can be produced by hot-rolling the Fe-Ni invar alloy; conducting cold rolling at a rolling reduction ratio of 85% or more and annealing at 700.degree. C. or higher in this order at least once; and then conducting cold rolling at a rolling reduction ratio not exceeding that in the previous cold rolling step and annealing at a temperature of 850.degree. C. or lower in this order.

REFERENCES:
patent: 5209900 (1993-05-01), Nakamura et al.

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