Abstract
The most important subject in the steelmaking process is the control of non-metallic inclusions. Nonmetallic inclusions with a high melting point do not deform during a hot working process because they are relatively hard. Hence, the inclusion composition should be controlled in order to achieve a low melting point to prevent product defects. Therefore, an MnO-SiO 2-based inclusion is considered to be one of the preferred systems. Moreover, the heat treatment of austenitic stainless steel has been reported to influence the composition of MnO-SiO 2-type inclusions; these inclusions change into MnO-Cr 2O 3-type, MnO-Nb 2O 5-type, and MnO-V 2O 3-type inclusions. In this study, we investigated the influence of heat treatment on the composition of the inclusions in the martensitic stainless steel. In general, a scanning electron microscope-energy dispersive x-ray spectrometer (SEM-EDS) is used for the quantitative analysis of inclusions; however, SEM-EDS cannot simultaneously analyze a large number of inclusions. Therefore, a new technique using the SEM-EDS along with the image analysis software "Particle Analysis" was used for the chemical analysis and the size measurement of a large number of inclusions (hereafter abbreviated as the PA method). The heat-treatment-induced compositional change of the inclusions in martensitic stainless steel was evaluated by using both the analysis methods.
Original language | English |
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Pages (from-to) | 1957-1966 |
Number of pages | 10 |
Journal | Isij International |
Volume | 51 |
Issue number | 12 |
DOIs | |
Publication status | Published - 2011 |
Keywords
- Alumina
- Analysis method
- Calcia
- Change
- Composition
- Crystallization
- Glass
- Heat treatment
- Inclusion
- Magnesia
- Manganese oxide
- Martensitic stainless
- Silica
ASJC Scopus subject areas
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry