Alloy sheet for shadow mask
US5562783A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1994 |
| Grant date | Oct 8, 1996 |
| Priority date | — |
| Expiry date | Jan 6, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01J2229/0733
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An alloy sheet for making a shadow mask consists essentially of 34 to 38 wt. % Ni, 0.07 wt. % or less Si, 0.001 wt. % or less B, 0.003 wt. % or less O, 0.002 wt. % or less N, and the balance being Fe and inevitable impurities. The alloy sheet has an average austenite grain size (Dav) of 10.5 to 15.0 .mu.m, a ratio of a maximum size to the minimum size of austenite grains (Dmax/Dmin) of 1 to 15, a Vickers hardness (Hv) of 165 to 220 and satisfying a relation of EQU 10.times.Dav+80.gtoreq.Hv.gtoreq.10.times.Dav+50; and gathering degree of crystal planes on said alloy sheet surface of PA1 14% or less for {111} plane, PA1 5 to 75% for {100} plane, PA1 5 to 40% for {110} plane, PA1 20% or less for {311} plane, PA1 20% or less for {331} plane, PA1 20% or less for {210} plane, and PA1 20% or less for {211} plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.