Experimental evaluation on weld zone of thin–laminated stacked sheets post-GTA weld of CRNO electrical steel
作者： N K Lautre , Bhushan Y Dharmik
DOI: 10.1007/S12046-021-01589-1
关键词: Base metal 、 Grain size 、 Optical microscope 、 Ultimate tensile strength 、 Materials science 、 Welding 、 Tungsten 、 Electrical steel 、 Scanning electron microscope 、 Composite material
摘要: Electric motor industries widely use cold-rolled non-oriented (CRNO) electrical steel sheets (ESSs) as the magnetic core. The are of low carbon–silicon, thin (0.5 mm), and laminated joined a stack with gas tungsten arc (GTA) welding. A weld zone is affected by welding heat dependent on current (30–110 A). fusion (FZ) heat-affected (HAZ) analyzed for variation in base metal (BM) microstructural properties using scanning electron microscope (SEM) optical (OM). effects depth, width, stress–strain relationship, filler material, grain size investigated change. Tensile micro-hardness testing FZ HAZ revealed change failure zones, maximum fracture load, micro-hardness. effect completely ferritic phases (α-phase γ-phase) also studied. All variations compared correlated to input thin–laminated, non-grain-oriented ESS.
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