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在10Cr-15Co-Ni基高溫合金中彎曲晶界形成的研究

  • 摘要: 本文研究了熱處理因素對W+Mo含量達12%的10Cr-15Co-Ni基高溫合金彎曲晶界形成的影響。指出在固溶處理后以1-10℃/分冷卻和固溶處理后空冷至1020-1130℃并在這一溫度范圍保溫一定時間均可獲得彎曲晶界。
    在彎曲晶界上同時并存有參與熱處理過程的兩種性質不同的r'和MbC型碳化物相,MbC型碳化物的生核并迅速長大是該類型合金引起晶界彎曲的主導因素,這一觀點與傳統的看法即在高合金化Ni基合金中r'相的不連續沉淀引起晶界彎曲是截然不同的。
    同時提出了在該類型合金中彎曲晶界形成的模型以及討論了彎曲晶界形成的機理。

     

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