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Fe-Ni-Cr-W-Mo系750℃與900℃部分相區圖

Partial Isothermal Sections of Phase Diagram at 750℃ and 900℃ in FeNiCr-W-Mo System

  • 摘要: 用X-線與電子衍射方法測定Fe-Ni-Cr-W-Mo系750℃與900℃部分相區圖,得出在750℃與900℃時,當含鉬量分別大于1.5%與1.0%時就可以產生μ相。在實驗合金成分范圍內,900℃時,當Mo含量不定,含W量>7%時就可以產生μ+Laves相,而750℃時不管W、Mo含量多少都不會產生Laves相。另外,證明傳統的控制μ相生成的電子空們數Nv=2.30,不適合本系統合金。

     

    Abstract: The partial isothermal sections of phase diagram at 750℃ and 900℃ in FeNiCr-W-Mo system have been determined by X-ray and TEM methods. Experimental results show, that when the content of Mo% is higher than 1.5% and 1.0% the μ phase can be formed at 750℃ and 900℃ respectively. When the content of tungsten is higher than 7% the μ and Laves phase can be formed at 900℃ in the chemical composition regime of tested alloys, however the Laves phase can not be formed at 750℃ regardless of the total amount of tungsten and molybdenum. In addition, experimental results have also proved that the traditional electron vacanr number Nv=2.30 for μ phase formation can not be vised in the investigated system.

     

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