پديد آورنده :
ناظمي، فرانك
عنوان :
بررسي تاثير پارامترهاي فرآيند توليد بر خواص مكانيكي و ريز ساختار فولادهاي نيكل دار متالوژي پودر
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
مهندسي مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
هجده، 132، [II]ص: مصور، جدول، شكل، نمودار
استاد راهنما :
حسين ادريس، غلامرضا آريانپور
توصيفگر ها :
سينتيك شيميايي، انتقال , افشانش(اتميزه كردن) , فولادهاي كم آلياژي , تفجوشي , سختي ماكرو و ميكرو , لايه دكربوره , فركتوگرافي , نمونه هاي استوانه اي ، دمبلي , نيكل و كربن , شكست نگاري , ميزان همگني
استاد داور :
حميد خرسند، مرتضي شمعانيان
تاريخ ورود اطلاعات :
1396/10/23
چكيده فارسي :
به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي
چكيده انگليسي :
ABSTRACT The development of new steel powders and processesduring the last decadeshas lead to a considerably increase of the applications for P M structural parts by reason of materials and cost saving and high perfonnance product and better dimensional tolerances Some of these applications in automotive industry are seat guide gear piston and connecting rods Green compact after compacting operation although it has acceptable density but obviously needed strength will be obtain after sintering operation In this regard this study emphasizes the influence of manufacturing parameters such as sintering time and temperature and chemical composition on the mechanical properties and microstructures of nickel alloyed P M steels In order to investigation the effect of additional nickel different amounts ofNi with graphite and lubricant was added to base iron powder water atomized WPL200 that partially diffused with Mo and Cu Mi ed powders after compaction were sintered at two temperature 1120 and 1250 C and two times 30 and 60 min in controlled atmosphere The average green density of specimens was about 6 8 i 0 05 g cm3 According to the change of time and temperature the degree of uniformity and diffusion of nickel in base powder and morphology of porosity with light and electron microscope and image tool were investigated In this project the mechanical properties such as ultimate tensile strength elongation and hardness and homogenization in research samples have been investigated d I u lifl V l J I f
استاد راهنما :
حسين ادريس، غلامرضا آريانپور
استاد داور :
حميد خرسند، مرتضي شمعانيان
