چکیده مقاله
In this study, failure causes of the welding side area of austenitic stainless steel pipes AISI321 of the direct reduction unit’s recuperator were investigated The main problemwas the impossibility of replacing the pipes after the fracture For this purpose, the cracks created in the pipes were repaired by filler metal ER347 and ERNiCr 3 using the melting welding method GTAW The microstructures of base and weld metals were evaluated by light and scanning electron microscopes using a reverse detector The cracks are knife attack grooves created next to the weld and about 3 to 5 mm in the weld area The results showed that the way to prevent cracks is to modify the welding method by selecting the appropriate parameters and inlet temperature It was found that the use of ERNiCr 3 filler metal to repair cracks due to having sufficient amounts of alloying elements can have optimal metallurgical properties and Improves working life and does not cause Sensitivity in the base metal
کلیدواژهها
نویسندگان
Parisa Arbabzadeh
Bachelor graduate, Department of Materials Engineering Isfahan University of Technology
Abdoulmajid Eslami
Assistant Professor, Department of Materials Engineering Isfahan University of Technology
Abbas bahrami
Assistant Professor, Department of Materials Engineering Isfahan University of Technology
Iman hajiannia
PhD in material science and engineering at MSE Co
شیوه ارجاع
Arbabzadeh, Parisa and Eslami, Abdoulmajid and bahrami, Abbas and hajiannia, Iman,1399,Investigation of the cause of failure and knifeline attack in the welds of tubes of the direct reduction unit's recuperator,3rd International Conference on Welding and Non-Destructive Testing of Iran, 21st National Conference on Welding and Inspection and 10th National Conference on Non-Destructive Testing,Isfahan
ارائهشده در
مجموعه مقالات سومین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب ایران، بیست و یکمین کنفرانس ملی جوش و بازرسی و دهمین کنفرانس ملی آزمایش های غیرمخرب13 اسفند 1399 · اصفهان