Casting processes, casting apparatuses therefor, and castings produced thereby
    27.
    发明授权
    Casting processes, casting apparatuses therefor, and castings produced thereby 有权
    铸造工艺,铸造设备和由此生产的铸件

    公开(公告)号:US08210240B2

    公开(公告)日:2012-07-03

    申请号:US12474475

    申请日:2009-05-29

    IPC分类号: B22C9/04 B22D27/04

    CPC分类号: B22D27/045

    摘要: A casting process and apparatus for producing directionally-solidified castings, and castings produced therewith. The process entails applying a facecoat slurry to a surface within a mold cavity to form a continuous solid facecoat on the surface, introducing a molten metal alloy into the mold cavity so that the molten metal alloy contacts the facecoat, and then immersing the mold in a liquid coolant to cool and solidify the molten metal alloy and form a casting of the metal alloy, during which an oxide layer forms on the casting surface. The facecoat is sufficiently adherent to the oxide layer such that at least a portion of the facecoat detaches from the mold surface and remains tightly adhered to the casting surface in the event the casting contracts during cooling. The facecoat contains at least 60 weight percent of a first phase of yttria, and the balance of the facecoat is a binder phase of an inorganic material.

    摘要翻译: 用于生产定向凝固铸件的铸造工艺和设备,以及由其制造的铸件。 该方法需要将表面涂层浆料施加到模腔内的表面以在表面上形成连续的实心面涂层,将熔融金属合金引入模腔中,使得熔融金属合金接触面涂层,然后将模具浸入 液体冷却剂以冷却和固化熔融金属合金,并形成金属合金的铸件,在此期间在铸造表面上形成氧化物层。 表面涂层与氧化物层充分贴合,使得至少一部分正面涂层在模具表面脱离并在冷却期间铸件收缩的情况下保持紧密地粘附于铸造表面。 面涂层含有至少60重量%的第一相的氧化钇,其余的表面涂层是无机材料的粘结相。