Method for producing a Fe-Ni alloy sheet and a Fe-Ni alloy shadow mask
    32.
    发明授权
    Method for producing a Fe-Ni alloy sheet and a Fe-Ni alloy shadow mask 失效
    Fe-Ni合金薄片和Fe-Ni合金荫罩的制造方法

    公开(公告)号:US6099669A

    公开(公告)日:2000-08-08

    申请号:US812499

    申请日:1997-03-07

    摘要: Composition segregation which results in streaks in an Fe--Ni alloy sheet shadow-mask is prevented by the following conditions. Heat-treatment from 1150.degree. C. to a temperature lower than the melting point for longer than 1 hour and not longer than 30 hours. Subsequent rough-rolling or forging at a reduction of area of 40% or more. A slab is subjected to removal of oxide scale on its surface and then heated in hydrogen atmosphere having dew point of 10.degree. C. or lower at a temperature of not less than 1100.degree. C. and lower than the melting point for time (t - hour) which is defined by:t.gtoreq.[3.8.times.10.sup.-7 exp (23830/T)]/R,where R is reduction area (%) at the slab production.

    摘要翻译: 通过以下条件可防止导致Fe-Ni合金薄片荫罩中的条纹的组成偏析。 从1150℃热处理至低于熔点的温度超过1小时,不超过30小时。 随后的粗轧或锻造面积减小40%以上。 在其表面上除去氧化皮,然后在不低于1100℃的温度并低于熔点的时间(t-)下在露点为10℃或更低的氢气氛中加热, 小时),其由以下定义:t> / = [3.8×10 -7 exp(23830 / T)] / R,其中R是板坯生产时的还原面积(%)。