مشاركة
دراسة انتقال الحرارة لمسبوكات المواد المنتجة بطريقة الطرد المركزي == A Study of The Heat Transfer For Alloys The Materials Produced By Use Centrifugal Casting
اسم المؤلف:
محمد قاسم محسن
اسم المشرف:
نوال عزت عبد اللطيف | كريمة اسماعيل عموري
الموضوع العام:
هندسة الانتاج والمعادن والمواد
السنة:
2009
الموضوع الدقيق:
هندسة المعادن
الدرجة:
ماجستير
الجامعة:
الجامعة التكنولوجية
اللغة:
العربية
مكان الجامعة:
بغداد
الصفحات الاولى:
50T170 - p.pdf
المستخلص:
تم كتابة برنامج حاسوبي بلغة فورتران (90) لدراسة الانتقال الحراري لبعدين(2 - D) بطريقة الفروقات المحددة المباشرة (Explicit Finite Difference Method) للمسبوكات ( Al - 4.5%Mg)،(Al - 7%Si)،المنتجة بطريقة السباكة بالطرد المركزي الافقية، اذ تم حساب سرعة دوران | Mathematical program writing completion by Fortran 90 to study the heat transfer in two dimensions(2 - D) by use explicit finite difference method for two alloys(Al - 4.5%Mg),(Al - 7%Si),this alloys were produced by the horizontal centrifugal casting, The mold rotation speed for the centrifugal casting was calculated and it was put in the mathematical program at the change of the mold rotation speed N=(100,1000,1500)rpm. And study the effect of the change of the mold rotation speed on the cooling rate and microstructure and hardness. We input to the mathematical program the boundary condition of the mold from (temperature ambient and heat transfer coefficient by convection of the alloys external)and input thermal physical properties of the alloys from (coefficient thermal conductivity of liquid and solidus,density of liquid and solidus, solid fraction, , specific heat of liquid and solidus, liquid temperature, latent heat of solidification, solidus temperature, alloys melting temperature),then we melted the alloys by use electric furnace and poured the melting alloys in the centrifugal casting mold after proceeding heating prematurely to the mold by used gaseous torch and fixing(digital thermal couple). We input to the mathematical program. And study the difference in mold rotation speed and it’s effected on the cooling rate of the both alloys and the mold and microstructure and hardness , and study the difference in the mold material effected on the cooling rate of the both alloys, and study effected the mold heating on the cooling rate of the both alloys. As a result we noted that the solidification time of the alloys is dependent upon the speed of rotation of the mold.
