Home Kovove Materialy-Metallic Materials 2013 Metallic Materials Vol. 51 (2013), no. 4, pp.241-249

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Metallic Materials Vol. 51 (2013), no. 4, pp.241-249

Title: The effect of nozzle orifice diameter on penetration depth and mechanical properties of AISI430/AISI1040 dissimilar steel joined by keyhole PTA welding process

Abstract: In this study, AISI 430/AISI 1040 steel couple 10 mm thick were welded in the butt position without any pre-treatment using keyhole plasma transferred arc (KPTA) process. Welded joints were manufactured selecting constant welding speed (0.01 m min-1) and two different nozzle orifice diameter (2.4 and 3.2 mm), three different welding currents (130, 135 and 140 A), at a constant plasma gas flow (1.2 l min-1), a shielding gas flow (25 l min-1). The microstructural changes that occurred in the interface regions of the welded samples were examined by microhardness, Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD) and Energy Dispersive Spectrometer (EDS). In order to determine mechanical properties of samples, the V-notch Charpy tests were performed. In addition, fracture types in the notch impact strength tests of samples were determined from the fractographic examinations using SEM.

Keywords: plasma transferred arc welding, keyhole, AISI 430, AISI 1040, nozzle orifice diameter
Published online: 20-Sep-2017
Year: 2013, Volume: 51, Issue: 4 Page From: 241, Page To: 249
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