dc.identifier.uri |
http://dx.doi.org/10.15488/14268 |
|
dc.identifier.uri |
https://www.repo.uni-hannover.de/handle/123456789/14382 |
|
dc.contributor.author |
Golovko, Oleksandr
|
|
dc.contributor.author |
Stolte, Max-Henry
|
|
dc.contributor.author |
Wölki, Kai
|
|
dc.contributor.author |
Hübner, Sven
|
|
dc.contributor.author |
Behrens, Bernd-Arno
|
|
dc.contributor.author |
Maier, Hans Jürgen
|
|
dc.contributor.author |
Nürnberger, Florian
|
|
dc.date.accessioned |
2023-07-24T07:18:39Z |
|
dc.date.available |
2023-07-24T07:18:39Z |
|
dc.date.issued |
2020 |
|
dc.identifier.citation |
Golovko, O.; Stolte, M.-H.; Wölki, K.; Hübner, S.; Behrens, B.-A. et al.: Tailoring Soft Local Zones in Quenched Blanks of the Steel 22MnB5 by Partial Pre-cooling with Compressed Air. In: Journal of Materials Engineering and Performance 29 (2020), Nr. 7, S. 4379-4389. DOI: https://doi.org/10.1007/s11665-020-04916-5 |
|
dc.description.abstract |
The high-strength boron steel 22MnB5 steel is widely used for automotive lightweight constructions. A novel approach is promising to tailor strength and ductility in the hardened condition using locally pre-tempered sheets for the hot stamping process. It results in the formation of locally soft spots where mechanical joining is subsequently intended. A slow pre-cooling of the later joining zones with cooling rates below a certain critical cooling rate for obtaining a decreased strength in these regions is required. A tubular air cooling system suited for this task is presented and tested in a process where the subsequent quenching of the overall sheet is realized by rapid cooling in a water bath. Varying the air pressure and cooling duration allows controlling the size of the softened local spot in a wide range and still obtaining a bainitic microstructure. Using two-stage cooling with point jet nozzles and a subsequent hot stamping process with water-cooled dies resulted in a main sheet hardness of about 470 HV5 and of 260 HV5 in the pre-cooled spots, respectively. |
eng |
dc.language.iso |
eng |
|
dc.publisher |
New York, NY : Springer |
|
dc.relation.ispartofseries |
Journal of Materials Engineering and Performance 29 (2020), Nr. 7 |
|
dc.rights |
CC BY 4.0 Unported |
|
dc.rights.uri |
https://creativecommons.org/licenses/by/4.0 |
|
dc.subject |
air pre-cooling |
eng |
dc.subject |
press hardening |
eng |
dc.subject |
process-integrated heat treatment |
eng |
dc.subject.ddc |
620 | Ingenieurwissenschaften und Maschinenbau
|
|
dc.subject.ddc |
660 | Technische Chemie
|
|
dc.subject.ddc |
670 | Industrielle und handwerkliche Fertigung
|
|
dc.title |
Tailoring Soft Local Zones in Quenched Blanks of the Steel 22MnB5 by Partial Pre-cooling with Compressed Air |
eng |
dc.type |
Article |
|
dc.type |
Text |
|
dc.relation.essn |
1544-1024 |
|
dc.relation.issn |
1059-9495 |
|
dc.relation.doi |
https://doi.org/10.1007/s11665-020-04916-5 |
|
dc.bibliographicCitation.issue |
7 |
|
dc.bibliographicCitation.volume |
29 |
|
dc.bibliographicCitation.firstPage |
4379 |
|
dc.bibliographicCitation.lastPage |
4389 |
|
dc.description.version |
publishedVersion |
eng |
tib.accessRights |
frei zug�nglich |
|