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    Method for producing of a low thermal expansion Ni-base superalloy
    1.
    发明公开
    Method for producing of a low thermal expansion Ni-base superalloy 有权
    瑞士法郎赫尔斯泰伦

    公开(公告)号：EP1591548A1

    公开(公告)日：2005-11-02

    申请号：EP05009211.3

    申请日：2005-04-27

    申请人： Daido Steel Co., Ltd. ,  MITSUBISHI HEAVY INDUSTRIES, LTD.

    发明人： Ueta, Shigeki c/o Daido Steel Co., Ltd. ,  Noda, Toshiharu c/o Daido Steel Co., Ltd. ,  Yamamoto, Ryuichi c/o Takasago R & D Center ,  Kadoya, Yoshikuni c/o Takasago R & D Center ,  Magoshi, Ryotaro c/o Takasago Machinery Works ,  Nishimoto, Shin

    IPC分类号： C22F1/10 ,  C22C19/05

    CPC分类号： C22C19/056 ,  C22C19/03 ,  C22C19/057 ,  C22C19/058 ,  C22F1/10

    摘要： The present invention provides a method for producing a low thermal expansion Ni-base superalloy, which includes: preparing an alloy including, by weight%, C: 0.15% or less, Si: 1% or less, Mn: 1% or less, Cr: 5 to 20%, at least one of Mo, W and Re, which satisfy the relationship Mo + 1/2(W + Re): 17 to 27%, Al: 0.1 to 2%, Ti: 0.1 to 2%, Nb and Ta, which satisfy the relationship Nb + Ta/2: 1.5% or less, Fe: 10% or less, Co: 5% or less, B: 0.001 to 0.02%, Zr: 0.001 to 0.2%, a reminder of Ni and inevitable components; subjecting the alloy to a solution heat treatment under the condition of at a temperature of 1000 to 1200°C; subjecting the alloy to either a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides under the conditions of at a temperature of not less than 850°C and less than 1000°C and for 1 to 50 hours, or a carbide stabilizing treatment for making aggregated carbides on grain boundaries and stabilizing the carbides by cooling from the temperature in the solution heat treatment to 850°C at a cooling rate of 100°C or less per hour; subjecting the alloy to a first aging treatment for precipitating y' phase under the conditions of at a temperature of 720 to 900°C and for 1 to 50 hours; and subjecting the alloy to a second aging treatment for precipitating A 2 B phase under the conditions of at a temperature of 550 to 700°C and for 5 to 100 hours.

    摘要翻译： 一种低热膨胀Ni基超合金的制造方法，包括以下步骤：在1000〜1200℃的温度条件下进行固溶热处理，对合金进行碳化物稳定化处理 在不低于850℃，小于1000℃的温度和1〜50小时的条件下，在晶界上形成碳化物，使碳化物稳定化，或碳化物稳定处理，使晶界上形成集碳化物 并通过从固溶热处理中的温度冷却到850℃，以每小时100℃或更低的冷却速度来稳定碳化物。 该方法还包括以下步骤：使合金进行第一时效处理以在720-900℃的温度和1至50小时的条件下使y'相析出，并对合金进行第二时效处理 用于在550-700℃的温度和5-100小时的条件下沉淀A2B相。