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Study on Non-Metallic Inclusions in Laser-Welded TRIP-Aided Nb-Microalloyed Steel

Study on Non-Metallic Inclusions in Laser-Welded TRIP-Aided Nb-Microalloyed Steel

Authors :
B. Grzegorczyk
Maciej Różański
Adam Grajcar
M. Kamińska
Source :
Archives of Metallurgy and Materials, Vol 59, Iss 3, Pp 1163-1169 (2014)
Publication Year :
2014
Publisher :
Polish Academy of Sciences Chancellery, 2014.

Abstract

The work concerns the studies on non-metallic inclusions occuring in laser-welded Si-Al TRIP steel containing Nb and Ti microadditions. Laser welding tests of 2 mm thick thermomechanically rolled sheets were carried out using keyhole welding and a solid-state laser. The results of laser welding in the air atmosphere for the heat input value of 0.048 kJ/mm are included. The distribution, type and chemical composition of non-metallic inclusions formed in the base metal, heat-affected zone, and fusion zone are analysed in detail. It was found that the base metal contains rare, fine oxysulphides. Their chemical composition was modified by rare earth elements. Numerous oxide inclusions of a various size and a chemical composition occur in the fusion zone. The dependence between a size of particles and their chemical composition was observed. A microstructure of steel was assessed using light microscopy and scanning electron microscopy techniques.

Details

ISSN :
23001909
Volume :
59
Database :
OpenAIRE
Journal :
Archives of Metallurgy and Materials
Accession number :
edsair.doi.dedup.....f32edbf4d39e545910f59ca66dae8a95
Full Text :
https://doi.org/10.2478/amm-2014-0203