4258

4029

كارشناسي ارشد

مكانيك

اصفهان : دانشگاه صنعتي اصفهان، دانشكده مكانيك

1387

ده، 124، [II] ص. : مصور، جدول، نمودار

ص. ع. به: فارسي وانگليسي

محسن ثقفيان

احمد رضا پيشه ور

23/7/1387

احمد صابونچي، احمد صداقت

مهندسي مكانيك

ID4029

به فارسي و انگليسي: قابل رويت در نسخه ديجيتال

Abstract One of the problem in galvanized strip production lines in the world is edge overcoating In hot dip coating process after passing the zinc pot and after small distance frommelt surface air jet flow contact to strip and coating thickness is controled by variousparameters such as jet supply pressure line speed geometric distances and angle of jetflow At first in this work coating thickness was measured in galvaniziation laboratoryexperimentally in many production conditions in lateral direction and then coatingthickness was determined in center to edge of strip Measuring was done by chemical andtool measurement According to lack of information for pressure and shear stressdistribution in Mobarakeh Steel corporation air knives this work was validated with pastwork Then jet flow of Mobarakeh Steel corporation air knives was simulated bycommercial code and pressure and shear stress which was determined on moving strip Then sensitive analysis was done to some of production parameters such as line speed supply jet pressure Pressure and shear stress is as an initial condition to thickness code todetermine coating thickness To prevent edge over coating some devices was presented Atfirst these devices was simulated and then cylinder device by 10 mm diameter was testedin galvanizing by personnel assistance experimentally Coating thickness was measured bytool measurement Results of measuring display that edge over coating was reduced Reducing of edge over coating cause to low consumption of zinc and usag of this strip inspecification consumptions

محسن ثقفيان

احمد رضا پيشه ور

احمد صابونچي، احمد صداقت