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金属学报  1998 

氧化钙坩埚在高纯净化合金研究中的应用

, PP. 731-734

Keywords: 真空感应熔炼,合金净化,氧化钙坩埚

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Abstract:

研究了在真空感应炉中使用氧化钙坩埚熔炼金属和合金的净化工艺.采用炉内打结感应烧结的方法,在10kg真空感应炉中制成了具有良好精炼和保温性能的氧化钙坩埚通过添加A1,La和Ca对纯铁和GH169合金进行了净化实验结果显示,采用氧化钙坩埚,在真空度为1.5—2.5Pa,1400℃下精炼,添加A1和La作为净化剂,精炼45min后氧和氮含量均降至20×10-4%(质量分数)以下,硫含量降至3×10-4%(质量分数)以下、还对氧化钙坩埚参与去除合金中硫、氧及氮杂质的机理进行了讨论

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