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相分計算在鐵基合金中的應用

  • 摘要: 本文提出了在復雜多元鐵基高溫合金中判斷σ相析出傾向的相分計算方法。對相當數量的工業合金和試驗合金的驗證,說明提出的方法是可靠的。進而簡化處理的相分計算方法也是可行的。以15Cr/25Ni型鐵基高溫合金為例。提出的△N'v=Ni-3Ti-3.5Al-1.7Si-0.9Cr-4.7計算式可以方便地根據△N'v<0,或>0,來判斷650℃長期時效時σ相的析出與否。同時,還可以應用△N'v的值來分析σ相對合金有關性能的影響。

     

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