چکیده مقاله
This study evaluated the mechanical strength of 304L austenitic stainless steel welds at minus 190 ° C for GTAW welding steel unit, which was in fact a case study To introduce the oxygen unit, it should be said that the best and cheapest way to achieve pure oxygen is to use ambient air, which first takes the ambient air with high power compressors and then this compressed air enters the turbine This turbine cools the air to a temperature of minus 190 degrees Celsius and enters the separator to be stored in separate tanks after separating the liquids 304L austenitic stainless steel pipe is one of the most widely used steels in the industry In this study, the oven, ion and welding instructions of 304L pipes were evaluated by GTAW welding method, and then all nondestructive tests, including radiography, were performed to ensure that the welds did not oxidize and did not have any defects Then, the necessary mechanical tests wereperformed to ensure the connection of 304L steel pipes at very low temperatures The results of welding samples showed that the specimens were stretched in the appropriate range and failed in the standard range, as well as no cracks in the specimens Weld surface and root bending test was not observed and finally the most important test that was performed in three areas of base metal, heat affected area and welding Charpi impact test, although at this temperature the impact energy was very low but showed soft failure results Finally, these connections were approved for operation for the steelmaking oxygen unit
کلیدواژهها
نویسندگان
Jamshid Ali Babaei
Manager of Technology and Development of Chaharmahal and Bakhtiari Steel Complex, Sefid Dasht
Iman Hajiannia
Chaharmahal and Bakhtiari Steel Complex, Sefid Dasht, MSE ,
شیوه ارجاع
Babaei, Jamshid Ali and Hajiannia, Iman,1400,Evaluation of mechanical strength of 304L austenitic stainless steel pipe welds at of -190 ° C for operation in steel making oxygen unit,4th International Conference on Welding and Non Destructive Testing & 22nd National Conference on Welding & Inspection & 11th National Conference on NDT,Isfahan
ارائهشده در
مجموعه مقالات چهارمین کنفرانس بین المللی جوشکاری و آزمایش های غیرمخرب و بیست و دومین کنفرانس ملی جوش و بازرسی و یازدهمین کنفرانس ملی آزمایش های غیرمخرب18 اسفند 1400 · اصفهان