The Solubility of Zr in Molten Mg. (On Al, Fe, Mn and Si as Impurities in Mg-Zr Alloys (1st Report))

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  • 熔融Mg中のZrの溶解度
  • ヨウユウMg チュウ ノ Zr ノ ヨウカイド

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Abstract

The grain-refining effect of Zr on magnesium is caused by Zr which is soluble in molten magnesium and Al, Fe, Mn and Si as impurities have unfavorable effects on this grain refining by making insoluble compounds with Zr. The grain-refining effects of Zr on magnesium containing the unfavorable elements above depend on the amounts of Zr and Al, Fe, Mn and Si which are soluble in molten magnesium together. Upon researches on the relation between Zr and Al, Fe, Mn and Si which are solubl in magnesium together at 700° and 800° the results obtained were follows: The solubility of Zr in magnesium was drastically decreased by presence of Al, Fe, Mn and Si The limits of the solubility in these cases were determined. When Zn was contained as alloying elements, the solubility of Zr in magnesium containing Al, Fe, Mn and Si was not so much decreased as in the case without Zn. The liquidus of the phase diagrams of Mg-Al-Zr, Mg-Fe-Zr, Mg-Mn-Zr, Mg-Si-Zr and Mg-Zn-Zr systems at Mg corners at 700° and 800° were obtained.

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