بررسی اثر ترکیبی عملیات کیفی مذاب و روش سطح شیبدار بر مورفولوژی سیلیسیم در آلیاژ Al-17% Si

نوع مقاله : علمی و پژوهشی

نویسندگان

1 جکیم سبزواری

2 حکیم سبزواری

چکیده

در این تحقیق، فرایند ریختن بر روی سطح شیب‌دار به‌همراه تأثیر توأم دمای فوق ذوب و عملیّات کیفی مذاب بر اصلاح ساختار و سختی آلیاژهای هایپریوتکتیک آلومینیم- سیلیسیم بررسی شده است. نتایج حاصل نشان دادند که کاربرد هم‌زمان عملیّات فوق ذوب و سطح شیب‌دار باعث کاهش اندازه‌ی ذرات سیلیسیم اولیّه و تغییر مُرفولوژی آن ازتیغه‌ای وگل‌برگی به شبه‌کروی می‌شود. افزون بر این، با ریزتر شدن و اصلاح مُرفولوژی سیلیسیم اولیّه، سختی آلیاژ افزایش یافت.

کلیدواژه‌ها


عنوان مقاله [English]

Effect of slope casting method combined with melt treatment on morphology of silicon in Al-17% Si alloy

نویسندگان [English]

  • bahman korojy 1
  • kaveh ghorbani 2
1 Hakim Sabzevari University
2 Hakim Sabzevari University
چکیده [English]

Inthis investigation, the slope casting method was used and its combined effect with melt overheating and melt treatmenton microstructural modification and hardness of hypereutectic Al–Si alloy was studied. The results showed that the combined method leads to the refinement of primary silicon and a change in its morphology from plate-like to quasi-spherical shape. In addition, the modification and refinement of primary silicon increased the hardness of hypereutectic Al-Si alloy.

کلیدواژه‌ها [English]

  • Al-Si alloy
  • slop casting
  • melt treatment
  • silicon morphology
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