پديد آورنده :
عطاء الهي، مليحه
عنوان :
ارزيابي فرايند پاشش حرارتي آلياژ منگنز - نيكل جهت لحيم كاري سخت فولاد زنگ نزن
مقطع تحصيلي :
كارشناسي ارشد
گرايش تحصيلي :
شناسايي و انتخاب مواد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان، دانشكده مواد
صفحه شمار :
شانزده، 113ص.: مصور، جدول، نمودار
استاد راهنما :
فخرالدين اشرفي زاده
استاد مشاور :
حميدرضا سليمي جزي
توصيفگر ها :
پاشش شعله اي پودري , پاشش پلاسماي اتمسفري , ذوب مجدد
تاريخ نمايه سازي :
1394/06/08
استاد داور :
مهران نحوي، مرتضي شمعانيان
تاريخ ورود اطلاعات :
1396/10/04
چكيده فارسي :
به فارسي و انگليسي
چكيده انگليسي :
114 Evaluation the thermal spray process of manganese nickel alloy for stainless steel brazing Maliheh Ataollahi m ataollahi@ma iut ac ir Date of Submission 2 6 2015 Department of Materials Engineering Isfahan University of Technology Isfahan 8415683111 Iran Degree M Sc Language Farsi Supervisor Fakhreddin Ashrafizadeh Prof email ashrafif@cc iut ac ir Abstract Manganese nickel chromium alloy is used as filler metal in brazing of the stainless steel and nickel base superalloys The melting point of this alloy is in the range of 1080 1100 C and is usually produced by casting in vacuum In this study the possibility of using mixture of manganese nickel and chromium powders in atmospheric plasma spraying and powder flame spray for brazing of stainless steel has been evaluated Appropriate weight percentages of the powders were mixed and spray coated on the surface of 304 stainless steel substrates The powders used for plasma spray process were mechanically alloyed for 15 and 50 hours in two different energy planetary ball mills Samples of the powders after15 hours ball milling were annealed at 800 C for 5 h to form Mn Ni solid solution For flame spraying the powders used of two different sizes were prepared in order to examine the effect of particle size on the rate of oxidation Experimental results showed that in both conditions the phases formed were similar but the amount of phases was different In the atmospheric plasma spray coatings the phases in mechanical alloyed powder for 15 h and annealed powder were similar and include manganese oxide nickel solid solution Mn Ni Mn YNi1 YO and NiMn2O4 oxides In both processes the powders reacted with oxygen and formed manganese oxide phases including MnO and MnYNi1 YO leading to increase in the melting point of coatings Thus annealing in the temperature range of 1080 1200 C caused only superficial and partial melting From the experimental results it was concluded that due to excessive oxidation neither atmospheric plasma spraying nor powder flame spray process can be used in brazing of conventional manganese nickel chromium alloy Keywords flame spray plasma spray mechanical alloying spray and fuse braizing manganese nickel alloy
استاد راهنما :
فخرالدين اشرفي زاده
استاد مشاور :
حميدرضا سليمي جزي
استاد داور :
مهران نحوي، مرتضي شمعانيان
