Mn對噴射沉積Al-25Si-xFe-yMn合金中Fe相的影響

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基金項目:

國家重點基礎研究發展計劃資助項目（No.2006CB605204）

Effect of Mn on Fe phases in spray-deposited Al-25Si-xFe-yMn alloys

1. State Key Laboratory of Environmental Adaptability for Industrial Products, China Electric Apparatus Research Institute, Guangzhou 510300, China;
2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China

摘要: 通過噴射沉積工藝制備了Al-25Si-xFe-yMn(Mn/Fe質量比在0～1之間)系列合金的沉積坯,利用SEM、XRD和EDX對這些沉積坯的微觀組織進行分析.結果表明,添加Mn元素,將生成顆粒狀的α-Al₁₅(Fe,Mn)₃Si₂,取代了針狀的δ-Al₄FeSi₂和β-Al₅FeSi相,從而顯著地改善高硅鋁合金中的Fe相的形貌,并且隨著Mn/Fe質量比的提高,沉積坯中顆粒狀的α-Al₁₅(Fe,Mn)₃Si₂含量也增加,而針狀相的含量卻減少,當Mn/Fe質量比增加到0.83或1時,在沉積坯中只發現顆粒狀的α-Al₁₅(Fe,Mn)₃Si₂.
- 硅鋁合金 /
- 鐵相 /
- 錳 /
- 噴射沉積
Abstract: Al-25Si-xFe-yMn alloys with the mass ratio of Mn to Fe between 0 and 1 were synthesized by spray deposition.The microstructure of the spray-deposited preforms was investigated by SEM,XRD and EDX.The results indicated that Mn addition could improve the morphology of Fe phases through forming particulate α-Al₁₅ (Fe,Mn)₃Si₂ phase to replace acicular δ-Al₄FeSi₂ and β-Al₅FeSi phases.When the mass ratio of Mn to Fe increased,the amount of particulate α-Al₁₅ (Fe,Mn)₃Si₂ phase would increase,whereas the amount of acicular phases reduced.When the mass ratio of Mn to Fe increased to 0.83 or 1,only particulate α-Al₁₅ (Fe,Mn)₃Si₂ phase could be observed in the deposited preform.
- hypereutectic Al-Si alloys /
- iron phase /
- manganese /
- spray deposition