Abstract
The dissertation deals with the optimization of the hot-dip galvanizing process in the coating of hot-rolled steel strips with a zinc-aluminum-magnesium (ZM) alloy. The aim is to improve the surface quality of the product and increase the process stability by investigating thermodynamic and kinetic aspects of the oxidation and reduction reactions on steel. The two focal points of the work are the analysis of oxidation and reduction reactions at relevant process temperatures up to a maximum of 500 °C and the mathematical modelling of the plant components relating to the hot phase of the steel. The aim of the literature research is to answer the question of whether and to what extent oxidation and reduction reactions are possible in the temperature range mentioned and whether indications of their kinetics can already be derived from this work. In addition, the basic description of different models for the reaction kinetics is carried out for a possible later evaluation of experimental results. The experimental part should in turn make it possible to demonstrate the influence of different atmospheric compositions on the steel strip surface in order to develop a mathematical model of oxidation and reduction on the basis of these findings. The experiments conducted for this purpose were carried out on a test rig specially designed and set up for this work, which was intended to enable all production parameters to be adequately tested.
| Translated title of the contribution | Modelling a continuous hot-dip galvanising line for hot-rolled strip |
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| Original language | German |
| Qualification | Dr.mont. |
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| Publication status | Published - 2025 |
Bibliographical note
embargoed until 09-04-2030Keywords
- Hot-rolled-Strip
- Heat-to-Coat
- Galvanizing
- Hot-Dip-Galvanizing
- Oxidation