Selective surface oxidation and segregation upon short term annealing of model alloys and industrial steel grades
- Segregation and selective oxidation phenomena of minor alloying elements during annealing of steel sheets lead to the formation of bare spots after hot-dip galvanizing. This thesis highlights the influence of annealing conditions and the effect of alloying elements on the selective oxidation in model alloys and some industrial steel grades. Model alloys of binary (Fe-2Si, Fe-2Mn, Fe-0.8Cr), ternary (Fe-2Mn-2Si, Fe-2Mn-0.8Cr, Fe-1Mn-0.8Cr, Fe-1Si-0.8Cr, Fe-2Si-0.8Cr) and quarternary (Fe-2Mn-2Si-0.8Cr) systems were studied. In the case of steels, standard grade interstitial free (IF) steels and experimental grade tensile strength 1000 MPa steel were investigated. All specimens were annealed at 820 °C in N\(_{2}\)-5%H\(_{2}\) gas atmospheres with the wide range of dew points (i.e. -80 to 0 °C). The surface chemistry after annealing and its wettability with liquid Zn have been correlated as a function of dew points by simulating the hot-dip galvanizing process at laboratory scale.
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| Author: | Srinivasan Swaminathan |
|---|---|
| URN: | urn:nbn:de:hbz:294-20938 |
| Referee: | Andreas D. WieckORCiDGND, Michael SpiegelGND |
| Document Type: | Doctoral Thesis |
| Language: | English |
| Date of Publication (online): | 2008/01/09 |
| Date of first Publication: | 2008/01/09 |
| Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
| Granting Institution: | Ruhr-Universität Bochum, Fakultät für Physik und Astronomie |
| Date of final exam: | 2007/12/11 |
| Creating Corporation: | Fakultät für Physik und Astronomie |
| GND-Keyword: | Segregation (Technik); Selektive Oxidation; Feuerverzinken; IF-Stahl; Legierung |
| Institutes/Facilities: | Max-Planck-Institut für Eisenforschung, Düsseldorf |
| Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Physik |
| Licence (German): |  Keine Creative Commons Lizenz - es gelten der Veröffentlichungsvertrag und das deutsche Urheberrecht |
