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Register a new userHardening of Aluminum
تقسـية الألمنـيوم
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اكتسبت سبائك الألمنيوم أهمية صناعية بالغة منذ بداية القرن التاسع عشر حتى اليوم. فهي تدخل في العديد من الصناعات الخفيفة و الثقيلة، و يقسى الألمنيوم بإشابته و بالمعالجات الحرارية تبعـاً للتطبيقـات الصناعية المطلوبة. حضر في هذه الدراسة سبائك من الألمنيوم – نحاس (تحـوي 5.0 % مغنيـسيوم)، حيث أُضيفت كميات من النحاس إلى الألمنيوم بنسب 5.2% 4% 5.4% بحيث لا تتعـدى حـد التـشبع للألمنيوم و هي 6 % نحاس بغرض تقسية الألمنيوم. و بعد إضافة نسب معينة من النحاس إلـى الألمنيـوم تُصهر العينات (الألمنيوم مع النحاس) ليمتزجا تماماً بحيث تنتشر ذرات النحاس في الألمنيوم، و يتم الصب بطرائق و شروط معينة، و من ثم تعالج السبائك المحضرة حرارياً بالتزمين في المجال 8-30 ساعة حـسب الشروط المفروضة. و عند درجات حرارة معينة مفروضة أيضاً بغرض دراسة تغير القساوة تبعـاً لنـسبة النحاس و زمن المعالجة الحرارية. درس في هذا البحث تأثير دور النحاس في تقسية الألمنيوم و العوامـل الأخرى الأساسية اللازمة للحصول على أعلى قساوة ممكنة .
Aluminum alloys have got extreme industrial importance since 19th century until now. They enter into several light and heavy industries. aluminum is hardened by impurity due to industrial application. In this study, aluminumcupper alloys (with 0.5% Mg) were prepared, where cupper amount was added to aluminum in different percentages (2.5%,4%,4.5%) ,no overtaking degree of saturation 6% of the weight of cupper. After adding definite percentage of cupper to aluminum, the compounds are fusioned for complete blending, where cupper atoms diffuse into aluminum. Samples are infusioned by definite methods and circumstances. The prepared alloys were thermally treated during 8-30 hours for hardening. In this research we will concentrate on the influence of cupper content on hardening of aluminum and other basic conditions, which are needed to obtain higher hardness for aluminum alloys.
References used
Burg,T., Crosky, A. (2001). School of Material Science and Engineering University of New South Wales
Huang, R. (2003). Web site. Dept of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin Fall
Lecture7-8. (2003). Heat treatable aluminum alloys. Engineering Mechanics The University of Texas at Austin Fall
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