Method for manufacturing a shadow mask of a Fe-Ni alloy

Details Method for manufacturing a shadow mask of a Fe-Ni alloy Method for manufacturing a shadow mask of a Fe-Ni alloy

1990-11-14

1992-11-17

Yee, Deborah

Metal treatment

Process of modifying or maintaining internal physical...

Heating or cooling of solid metal

148635, 148636, C21D 812

Patent

active

051640210

ABSTRACT:
In composition of a Fe-Ni alloy used for television shadow masks and containing in, Co, Mn, Si and Cr as the major components, additional inclusion of Be assures high deformation resistance and easy pore formation via etching without impairing its inherent low thermal expansion. Introduction of annealing at 800.degree. to 1200.degree. C. temperature into production process sufficiently lowers proof stress of the product without causing any noticeable crystal coarseness. Increased mechanical strength enables production of a thin shadow mask material well suited for pore formation via etching, thereby assuring high grade screen display.

REFERENCES:
patent: 4827178 (1989-05-01), Higashinakagawa et al.

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