Investigations of Microstructure and Phase Composition of Different Self-Shield Flux-Cored Wire Slag System

Abstract:

A series of slag were fabricated by self-shield welding of different flux-cored wire. The microstructure and phase composition of those slag were investigated by means of metallographic microscope, SEM,EDX and X-ray diffraction respectively. The result demonstrated that the slag forming material of TiO₂ and Al₂O₃ tenders to form the framework structure of slag, while CaO and MnO₂ inclines to incorporate in the grain boundary. Furthermore, the dense and dendrite phase structure of slag was beneficial for the removal of slag. On the contrary the slag with tiny needle and skeleton-like structure was difficult to clear up. In conclusion, the detachability performance was not only affected by the microstructure, but also by the chemical composition of the slag system.

• Periodical: Materials Science Forum (Volume 850)
• Pages: 748-754
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.850.748
• Online since: March 2016
• Authors: Jiang Long Yi, Xin Xin Wang, Kai Wang, Shi Da Zheng, He Xin Chen, Chun Fu Guo, Ben Niu
• Keywords: Detachability, Flux-Cored Wire, Microstructure, Self-Shield Weld, Slag System

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