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Refractory material for casting a rare-earth alloy and its production method as well its use 发明授权

2023-08-21 4040 897K 0

专利信息

申请日期 2025-07-11 申请号 EP05024232
公开(公告)号 EP1659102B1 公开(公告)日 2010-05-26
公开国别 EP 申请人省市代码 全国
申请人 SHOWA DENKO K K
简介 Rare-earth alloy is cast into a sheet (6) or the like by using a tundish (3, 13). The refractory material of the tundish used for casting does not necessitate preheating for improving the flowability of the melt (2). The refractory material used essentially consists of 70 wt% or more of Al 2 O 3 and 30 wt% or less of SiO 2 , or 70 wt% or more of ZrO 2 and 30 wt% or less of one or more of Y 2 O 3 , Ce 2 O 3 , CaO, MgO, Al 2 O 3 , TiO 2 and SiO 2 . The refractory material has 1g/cm 3 or less of bulk density, has 0.5 kcal/(mh°C) or less of thermal conductivity in the temperature range of from 1200 to 1400°C, and has 0.5 wt% or less of ratio of ignition weight-loss under the heating condition of 1400°C for 1 hour.


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