专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

2. 发明授权

US06632298B1 Casting slab for shadow mask, method for heat treatment thereof and material for shadow mask 失效
标题翻译：荫罩用铸片，热处理方法及荫罩材料
公开(公告)号：US06632298B1
公开(公告)日：2003-10-14
申请号：US09979780
申请日：2002-02-26
申请人： Syun-ichi Morita , Taizo Sato , Jun Agari , Tsutomu Omori , Tatsuya Itoh , Shigeru Hirata
发明人： Syun-ichi Morita , Taizo Sato , Jun Agari , Tsutomu Omori , Tatsuya Itoh , Shigeru Hirata
IPC分类号： C22C3808
CPC分类号： H01J9/142 , B22D11/00 , B22D21/00 , C21D6/001 , C21D8/005 , C22C30/00 , C22C38/08 , H01J2229/0733
摘要： The present invention aims at providing a sophisticated segregation reducing technique which a conventional technique cannot achieve by finding the relationship between the casting structure and the segregation of components at the time of solidification and the heat treatment conditions. That is, the present invention aims at providing material for shadow masks which exhibits excellent quality with respect to streaks. A material for a shadow mask of the present invention is formed of a casting slab for preparing the shadow mask which comprises an Ni—Fe alloy containing 30 to 45% of Ni. The casting slab has a cast structure comprising a columnar crystal and/or a chill crystal in an amount of 99% or more. In particular, it is preferred that the casting slab contains no equiaxed crystal. To this end, such casting slab is prepared by a continuous casting method in which casting operation is carried out with no electromagnetic stirring and with maintaining a melt temperature of the non-solidificated part in the slab at a temperature equal to or more than the liquidus thereof. Further, the resultant slab is subjected to a heat treatment at a temperature for a time such that the K value becomes 150 &mgr;m or more, to thereby diffuse the segregation of Ni.
摘要翻译：本发明旨在提供一种复杂的偏析减少技术，其通过在凝固时和热处理条件下发现铸造结构与组分偏析之间的关系而无法实现。也就是说，本发明旨在提供一种相对于条纹表现出优良品质的荫罩材料。本发明的荫罩用材料由含有30〜45％的Ni的Ni-Fe合金制成荫罩的铸造板构成。铸造板具有含有99％以上的柱状晶体和/或冷却晶体的铸造结构体。特别地，优选铸造板不含等轴晶体。为此，这种铸造板坯通过连续铸造方法制备，其中在没有电磁搅拌的情况下进行铸造操作，并且将板坯中非固化部分的熔融温度保持在等于或大于液相线的温度其中。此外，将所得板坯在K值变为150μm以上的温度下进行热处理，由此扩散Ni的偏析。

IPRDB

热门服务

关于我们

友情链接

联系方式