Affiliation:
1. Shanghai University of Engineering Science
Abstract
Abstract
The dissimilar 05Cr17Ni4Cu4Nb stainless steel and HR-2 stainless steel were welded without groove and wire filling by laser deep fusion welding. The weld metals (WM) microstructure characteristics of different laser power and its mechanical properties and Crep on the corrosion resistance of welded joints resistance were investigated in detail. The dissimilar the WM illustrated ferritic-austenitic mode of solidification with different welding processes. The weld joints have fine grain size and excellent mechanical properties with lower laser powers. The test specimens of mechanical properties failed at the HR-2 side with massive dimples distributing on the fracture surfaces, indicating typical ductile fracture characteristics of weld joints. The EDS results of the WM show that the white granular carbides are mainly NbC and M(Cr, Fe)23C6 precipitated phases in the WM. The results of electrochemical testing of welded joints show that the best corrosion resistance of welded joints is achieved with higher Crep in the WM.
Publisher
Research Square Platform LLC
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