کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
831169 | 1470364 | 2012 | 9 صفحه PDF | دانلود رایگان |
High pressure heat-resistant cast stainless steel (HP steel) tubes produced by centrifugal casting are used in petrochemical industries for pyrolysis furnaces. They have appropriate ductility and weldability in as-cast conditions. These steels lose their ductility and weldability after being used in service and, hence, require repair. In the present study, the effect of metallurgical changes on weldability and ductility was investigated. The life span of the studied tubes was 5 years. Using electrodes with a chemical composition close to the base metal analysis, welding was done by gas-tungsten arc welding (GTAW) process. Solution treatment was used to recover the properties of tubes which can be useful, depending on metallurgical changes.
► To investigate the weldability and property changes of high pressure heat-resistant cast stainless steel (HP) tubes.
► Welding was done by gas-tungsten arc welding (GTAW) process.
► Composition of precipitates was characterized by means of SEM and EDS analyses.
► The solution treatment was used to recover the properties of tubes.
► To investigate mechanical strength of specimens, tensile tests were carried out at room temperature.
Journal: Materials & Design - Volume 33, January 2012, Pages 476–484