Dissimilar Laser Welding of AISI 321 and AISI 1010

Tehnički Vjesnik

Ionelia Voiculescu¹  Iosif Hulka²  Alexandru Pascu³  Ionut Claudiu Roata³  Elena Manuela Stanciu³  Mircea Horia Tierean³  Catalin Croitoru³ 

[1] Politehnica University of Bucharest, Faculty of Engineering and Management of Technological Systems, Splaiul Independentei, 313, Bucharest, Romania;Polytechnic University of Timisoara, Victoriei Sqare, 2, 300006, Timişoara, Romania;Transilvania University of Brasov, Department of Materials Engineering and Welding, Colina Univeristatii, 1, Brasov, Romania;

关键词: dissimilar welding;    laser;    microhardness;    stainless steel;    tensile behaviour;   

DOI  :  

来源: DOAJ

【 摘 要 】

This paper presents the dissimilar laser welding of AISI 321 stainless steel and AISI 1010 carbon steel thin sheets in butt joint geometry using a 1 kW diode laser. Influence of the welding speed on the geometry and microstructure of the joints is discussed. Structural characterisation of the welds is realised through optical, electron microscopy and EDS analysis, observing distinct mixed and unmixed areas in the weld bead because of the high cooling rate. The weld bead presents an austenitic-martensitic-ferrite structure, characterized by austenitic twin grains with ferrite particles precipitated on grain boundaries, and islands comprising a ferrite-martensite structure. Chromium and nickel migration in the weld bead area was observed. Good tensile behaviour of the dissimilar joints was obtained, as all the specimen failure occurs far-off the weld zone.

【 授权许可】

Unknown