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    Isothermal and high retained strain forging of Ni-base superalloys
    1.
    发明授权
    Isothermal and high retained strain forging of Ni-base superalloys 失效
    Ni基超级合金的等温和高保留应变锻造

    公开(公告)号：US6059904A

    公开(公告)日：2000-05-09

    申请号：US862448

    申请日：1997-05-23

    申请人： Mark Gilbert Benz ,  Michael Francis Henry ,  Charles Philip Blankenship, Jr. ,  Aldo Enrique Murut

    发明人： Mark Gilbert Benz ,  Michael Francis Henry ,  Charles Philip Blankenship, Jr. ,  Aldo Enrique Murut

    IPC分类号： B22F3/24 ,  C22F1/10 ,  B22F3/00

    CPC分类号： C22F1/10 ,  B22F3/24 ,  B22F2998/00 ,  Y10S72/709

    摘要： A method combining isothermal and high retained strain forging is described for Ni-base superalloys, particularly those which comprise a mixture of .gamma. and .gamma.' phases, and most particularly those which contain at least about 40 percent by volume of .gamma.'. The method permits the manufacture of forged articles having a fine grain size in the range of 20 .mu.m or less. The method comprises the selection of a fine-grained forging preform formed from a Ni-base superalloy, isothermal forging to develop the shape of the forged article, subsolvus forging to impart a sufficient level of retained strain to the forged article to promote subsequent recrystallization and avoid critical grain growth, and annealing to recrystallize the microstructure. The method permits the forging of relatively complex shapes and avoids the problem of critical grain growth. The method may also be used to produce location specific grain sizes and phase distributions within the forged article.

    摘要翻译： 描述了一种组合等温和高保留应变锻造的方法，用于Ni基超级合金，特别是包含γ和γ'相的混合物的那些，特别是包含至少约40体积％的γ'的那些。 该方法允许制造具有20μm以下的细粒度的锻造制品。 该方法包括选择由Ni基超级合金形成的细粒锻造预成型体，等温锻造以形成锻造制品的形状，以进行锻造以赋予锻造制品足够的保留应变水平以促进随后的重结晶， 避免临界晶粒生长，退火再结晶组织。 该方法允许锻造相对复杂的形状并避免关键晶粒生长的问题。 该方法还可用于在锻造制品内产生特定位置的粒度和相分布。