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Grain refinement in coarse-grained heat-affected zone of Al–Ti–Mg complex deoxidised steel
- Source :
- Science and Technology of Welding and Joining. 24:43-51
- Publication Year :
- 2018
- Publisher :
- Informa UK Limited, 2018.
-
Abstract
- The particles and microstructure characteristics of coarse-grained heat-affected zone (CGHAZ) in Al–Ti–Mg killed steels with different Al contents were investigated. The results show that inclusion in high Al steel consists of Al–Mg oxide surrounded with a layer of MnS. However, inclusion in low Al steel is Al–Ti–Mg oxide covered with a layer of MnS, effectively promoting the formation of acicular ferrite. The precipitates of both steels are (Ti, Nb)N, the finer and more dispersed inclusions and precipitates in low Al steel can effectively inhibit austenite grain growth by grain boundary pinning during the thermal cycle. The fine-grained microstructure is obtained in CGHAZ of the low Al steel due to the pinning effect of finer particles and the high density of acicular ferrite.
- Subjects :
- 0209 industrial biotechnology
Heat-affected zone
Materials science
Metallurgy
Oxide
02 engineering and technology
021001 nanoscience & nanotechnology
Condensed Matter Physics
Microstructure
Acicular ferrite
Grain size
chemistry.chemical_compound
020901 industrial engineering & automation
chemistry
General Materials Science
Grain boundary
Inclusion (mineral)
0210 nano-technology
Layer (electronics)
Subjects
Details
- ISSN :
- 17432936 and 13621718
- Volume :
- 24
- Database :
- OpenAIRE
- Journal :
- Science and Technology of Welding and Joining
- Accession number :
- edsair.doi...........bfcde44c2700f0829998852d34878a2d