Abstract
Hot stamping is a forming process used in the automotive industry to form structural
parts. A sheet metal blank is austenitized in a furnace, formed at high temperatures (600-
800 °C) and quenched in the press such that a martensitic structure is obtained. In this
way, high strength (~1500 MPa) can be combined with good formability and good
geometrical tolerances. However, due to forming at high temperatures, the friction is
relatively high and tool wear is severe. The tool wear causes scratches on the parts,
leading to lower heat transfer and high maintenance costs.
In this thesis, the friction and wear mechanisms in hot stamping are addressed and a
physics-based multi-scale friction model is coupled with FE analysis.
parts. A sheet metal blank is austenitized in a furnace, formed at high temperatures (600-
800 °C) and quenched in the press such that a martensitic structure is obtained. In this
way, high strength (~1500 MPa) can be combined with good formability and good
geometrical tolerances. However, due to forming at high temperatures, the friction is
relatively high and tool wear is severe. The tool wear causes scratches on the parts,
leading to lower heat transfer and high maintenance costs.
In this thesis, the friction and wear mechanisms in hot stamping are addressed and a
physics-based multi-scale friction model is coupled with FE analysis.
| Original language | English |
|---|---|
| Qualification | Doctor of Philosophy |
| Awarding Institution |
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| Supervisors/Advisors |
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| Thesis sponsors | |
| Award date | 25 Sept 2019 |
| Place of Publication | Enschede |
| Publisher | |
| Print ISBNs | 978-90-365-4817-5 |
| DOIs | |
| Publication status | Published - 25 Sept 2019 |
Keywords
- Hot stamping
- Tribology
- Friction
- Wear
- Sheet metal forming
- FE analysis