Ni-base Eutectic alloy article and heat treatment
    3.
    发明授权
    Ni-base Eutectic alloy article and heat treatment 失效
    镍基共晶合金制品和热处理

    公开(公告)号:US4305761A

    公开(公告)日:1981-12-15

    申请号:US121627

    申请日:1980-02-14

    IPC分类号: C30B33/00 C22F1/10

    摘要: An improved columnar grained, polycrystalline, anisotropic article is provided of a Ni-base, carbide fiber reinforced eutectic alloy by a method of providing a unidirectionally solidified cast body which includes such fibers aligned and embedded in a gamma-gamma prime structure. Such body is heated at a first temperature to fully solution the gamma-gamma prime without melting the carbide fibers; exposed to a second, lower, temperature to precipitate fine gamma prime in substantially cuboidal shape within the size range of 1-4 microns; and exposed to a third, still lower, temperature to perfect such cuboidal structure without refinement or coarsening. The resultant article is characterized by improved longitudinal stress rupture life.

    摘要翻译: 通过提供单向凝固的铸造体的方法,由Ni基碳化物纤维增强的共晶合金提供改进的柱状晶粒,多晶,各向异性制品,该铸造体包括对准并嵌入γ-γ原子结构的这种纤维。 将这种体在第一温度下加热以完全溶解γ-γ原料而不熔化碳化物纤维; 暴露于第二个较低的温度以在1-4微米的尺寸范围内以基本上呈立方形的形状沉淀出细小的γ原子; 并暴露于第三,仍然较低的温度以完善这种立方体结构,而不会细化或粗化。 所得制品的特征在于改善纵向应力断裂寿命。