پديد آورنده :
هاماني جزي، مرتضي
عنوان :
بررس تاثير پارامترهاي شكل ريزي كوبشي بر خصوصيات يك قطعه آلومينيومي
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسائي و انتخاب مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
سيزده، 105، [II]ص.: مصور، جدول، شكل، نمودار
استاد راهنما :
بهزاد نيرومند
توصيفگر ها :
ريخته گري كوبشي , دماي باريزي مذاب , پوشان قالب , جدايش ماكروسكوپي , گاززدائي , تلقيح , تعيين دانسيته , پراكندگي تخلخلها , مشاهدات متالوگرافي
استاد داور :
محمود مراتيان، فرشاد اخلاقي
تاريخ ورود اطلاعات :
1396/01/15
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
Effect of Squeeze Casting Parameters on the Properties of an Aluminum Cast Component Abstract Aluminum pistons are routinely produced by gravity die casting method which results in medium yield and mechanical properties Squeezecasting has been utilized recently to overcome these shortcomings In this process which combines permanent mould casting with die forging into a single operation molten metal is solidified under an external pressure This can result in a fine grained structure with excellent surface finish and almost no porosity In this study the effects of squeezecasting parameterson the surface quality microstructure and mechanical properties of a piston like component cast from LM13 aluminum alloy were investigated The experimental parameters include pouring temperature die temperatureand application of pressureduring solidification The results showed that improvements in microstructure mechanical properties dendrite arm spacing Si particles morphology porosity and surface quality of the castings could be achieved by proper application of pressure during solidification The optimum pouringtemperature and die temperature to attain the best combination of the above mentionedproperties was found to be about 680 and 250 C respectively Density of both squeeze cast and gravity cast components showed an increase followed by a decrease withincreasing the pouring temperature Dendrite arm spacingand Si particles shape factor ofsqueezecast components were found to be smaller than those of gravity cast ones andthey increasedat higher pouring and die temperaturesfor both cases Tensile strengthandhardnessof squeeze cast components were observed to be higher than those of gravitycast ones in all experimental conditions These properties showed an increase followedby a decrease when either pouring temperature or die temperature was raised Theexperimental results were explained based on the interaction of microstructure surfaceand internal defects cooling rate and solidification progress in the die prior to pressureapplication The optimum cooling rate to reach the best combination of microstructure mechanicalproperties and surface quality was estimatedto be about 3 7 3 9 C Sec it 1 1 1 t J VJtJY i v JJJv g
استاد راهنما :
بهزاد نيرومند
استاد داور :
محمود مراتيان، فرشاد اخلاقي
