Details

Autor(en) / Beteiligte

• Zhang, Chenyang
• Liu, Minglang
• Shi, Xinying
• Wang, Xuyang
• Wang, Gang
• Wang, Mengmeng
• Huang, Zhongjia

Titel

Microstructure and mechanical property of CO2 laser welding of additive manufacturing and rolling plates of 420 stainless steels

Ist Teil von

• Welding in the world, 2023-08, Vol.67 (8), p.1937-1949

Ort / Verlag

Berlin/Heidelberg: Springer Berlin Heidelberg

Erscheinungsjahr

2023

Quelle

SpringerLink (Online service)

Beschreibungen/Notizen

• Since the rapid development of additive manufacturing, it has been urgent to figure out the mechanism and performance of the welding between additively and traditionally prepared samples. In this paper, the plate samples of 420 stainless steel (420SS) with the thickness of 2 mm were fabricated by selective laser melting (SLM) and rolling methods, respectively. The two kinds of plates were joined by CO 2 laser welding with the power ranging from 1.0 to 1.3 kW, and the mechanical properties, microstructures, and cross-sectional morphologies of the welds were investigated. The average tensile strength of different laser welding powers were approximately 472.12 ± 16 MPa for 1.0 kW, 500.62 ± 7 MPa for 1.1 kW, 502.09 ± 5 MPa for 1.2 kW, and 501.87 ± 4 MPa for 1.3 kW, respectively. The grains in the heat-affected zone become coarser with increasing input laser power. Interestingly, such grain coarsening of the SLM prepared part is much more limited than that of the rolled part, suggesting the better welding performance given by the SLM technology. Different from the rolled samples, SLM processing leads to much narrower heat-affected zones. The weldability between SLM formed and rolled plates is acceptable.