Abstract
In this investigation, steel P355NH was successfully cladded with Inconel 625 through the method of explosive welding. Explosively welded bimetal was subjected to the two separated heat treatment processes: stress relief annealing (at 620 °C for 90 min) and normalizing (at 910 °C for 30 min). In order to examine the quality of joint and effects of heat treatments, the mechanical properties of the obtained samples were evaluated by tensile test, shear test, Charpy impact test and bend test. It was found that tensile strength of explosively welded bimetal is higher than tensile strength of the base material in the as-received state. Compared to the bimetal clad plate without heat treatment, bimetal subjected to the stress relief annealing has improved mechanical properties. It was stated that stress relief annealing is recommended heat treatment for Inconel 625/steel P355NH bimetal clad plate obtained by explosive welding.
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