Abstract:
It has been established that in weld metal of microalloyed steel the ferritic
structure dominates, occurring in different morfologic forms. Acicular ferrite
is the most desirable morphology of ferrite, so this paper analyses influence
of the composition of gas mixture on the ferrite modification in the weld
metal, specially on the morphology of acicular ferrite. At the same time, this
morphological form of ferrite is very significant, because it has great influence
on the mechanical properties, toughness specially. Five different gas
mixtures (Ar,CO2,O2) were used to determine the optimal gas shielded metal
arc process. For investigated microalloyed steel, the optimum gas mixture
has been established (5% CO2, 0.91% O2, balance Ar), providing
maximum
impact energy due to microstructure, consisting dominantly of acicular ferrite.
CITATION:
IEEE format
O. Popović, R. Prokić - Cvetković, N. Milošević, D. Cvetković, “The Effects of Composition of Shielding Gas Mixture on the Microstructure and Toughness of Microalloyed Steel Weld Metal,” in Sinteza 2016 - International Scientific Conference on ICT and E-Business Related Research, Belgrade, Singidunum University, Serbia, 2016, pp. 226-229. doi:10.15308/Sinteza-2016-226-229
APA format
Popović, O., Prokić - Cvetković, R., Milošević, N., Cvetković, D. (2016). The Effects of Composition of Shielding Gas Mixture on the Microstructure and Toughness of Microalloyed Steel Weld Metal. Paper presented at Sinteza 2016 - International Scientific Conference on ICT and E-Business Related Research. doi:10.15308/Sinteza-2016-226-229