This work was performed to characterize the dissimilar austenitic grade SS304 L and martensitic grade creep strength of an enhanced P92 steel welded joint. The welded joint was prepared using the autogenous gas tungsten arc welding process. The welded joint was subjected to conventional heat treatment consisting of tempering at 760 °C for 2 hours, followed by air cooling and unconventional heat treatment (UHT) consisting of normalizing (1040 °C/40 min), further followed by air cooling and, finally, stabilized tempering at 760 °C for 2 hours. The heat-treated welded joint was subjected to the microstructural characterization and mechanical testing. The room temperature Charpy toughness (CT) testing for both the weld fusion zone (WFZ) and heat-affected zone, tensile testing, and hardness testing were performed to characterize the dissimilar welded joint. Stabilized microstructure associated with improved mechanical properties were observed for UHT. The CT and tensile strength were optimum for the UHT.

进行这项工作是为了表征增强的P92钢焊接接头的奥氏体等级SS304 L和马氏体等级蠕变强度。焊接接头采用自生气体钨极电弧焊工艺制备。对焊缝进行常规热处理，包括在760°C下回火2小时，然后进行空气冷却和常规热处理（包括正火处理（1040°C / 40分钟）），然后进行空气冷却，以及最后，在760°C下稳定回火2小时。对热处理过的焊接接头进行了显微组织表征和机械测试。焊缝熔合区（WFZ）和热影响区的室温夏比韧性（CT）测试，拉伸测试，进行了硬度测试以表征不同的焊接接头。对于UHT，观察到与改善的机械性能相关的稳定的微观结构。CT和拉伸强度对于UHT是最佳的。