Details
Originalsprache | Englisch |
---|---|
Seiten (von - bis) | 271-280 |
Seitenumfang | 10 |
Fachzeitschrift | Steel research international |
Jahrgang | 88 |
Ausgabenummer | 2 |
Publikationsstatus | Veröffentlicht - 1 Feb. 2017 |
Abstract
Modified press-hardening processes are very attractive for manufacturing safety-relevant vehicle body parts from steels with martensitic–ferritic microstructures. In the process developed, the formation of the two-phase microstructure and the hot sheet forming simultaneously occur subsequently to an intercritical annealing. By contrast, previously used process chains do not integrate setting of a multi-phase microstructure within the forming step. In order to successfully combine the intercritical annealing with the actual forming, comprehensive knowledge of the microstructural evolution and the resulting mechanical properties is needed. Specifically, different heat-treating routes are used to obtain different microstructures of ferritic–martensitic dual-phase steels and partial martensitic steels. As a result of intercritical annealing in the temperature range of Ac1–Ac3, it is possible to vary the martensite volume fractions from 7 to 96 vol%. The data obtained can be employed for numerically describing the microstructural transformation and for designing the heat treatment process. It is demonstrated that this combined process allows for designing steels that feature properties that are similar to complex-phase steels.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Chemie (insg.)
- Physikalische und Theoretische Chemie
- Werkstoffwissenschaften (insg.)
- Metalle und Legierungen
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
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in: Steel research international, Jahrgang 88, Nr. 2, 01.02.2017, S. 271-280.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - The Effect of Intercritical Annealing on the Microstructure and Mechanical Properties of Ferritic–Martensitic Two-Phase Steels
AU - Wolf, Lars Oliver
AU - Nürnberger, Florian
AU - Rodman, Dmytro
AU - Maier, Hans Jürgen
N1 - Funding Information: The authors thank the German Research Foundation (DFG) for financial support of project A2 “Process Adapted Dual Phase Steels” within the framework of the International Research and Training Group (IRTG) 1627.
PY - 2017/2/1
Y1 - 2017/2/1
N2 - Modified press-hardening processes are very attractive for manufacturing safety-relevant vehicle body parts from steels with martensitic–ferritic microstructures. In the process developed, the formation of the two-phase microstructure and the hot sheet forming simultaneously occur subsequently to an intercritical annealing. By contrast, previously used process chains do not integrate setting of a multi-phase microstructure within the forming step. In order to successfully combine the intercritical annealing with the actual forming, comprehensive knowledge of the microstructural evolution and the resulting mechanical properties is needed. Specifically, different heat-treating routes are used to obtain different microstructures of ferritic–martensitic dual-phase steels and partial martensitic steels. As a result of intercritical annealing in the temperature range of Ac1–Ac3, it is possible to vary the martensite volume fractions from 7 to 96 vol%. The data obtained can be employed for numerically describing the microstructural transformation and for designing the heat treatment process. It is demonstrated that this combined process allows for designing steels that feature properties that are similar to complex-phase steels.
AB - Modified press-hardening processes are very attractive for manufacturing safety-relevant vehicle body parts from steels with martensitic–ferritic microstructures. In the process developed, the formation of the two-phase microstructure and the hot sheet forming simultaneously occur subsequently to an intercritical annealing. By contrast, previously used process chains do not integrate setting of a multi-phase microstructure within the forming step. In order to successfully combine the intercritical annealing with the actual forming, comprehensive knowledge of the microstructural evolution and the resulting mechanical properties is needed. Specifically, different heat-treating routes are used to obtain different microstructures of ferritic–martensitic dual-phase steels and partial martensitic steels. As a result of intercritical annealing in the temperature range of Ac1–Ac3, it is possible to vary the martensite volume fractions from 7 to 96 vol%. The data obtained can be employed for numerically describing the microstructural transformation and for designing the heat treatment process. It is demonstrated that this combined process allows for designing steels that feature properties that are similar to complex-phase steels.
KW - 22MnB5
KW - dual-phase steel
KW - intercritical annealing
KW - LH800
KW - partial martensitic steel
UR - http://www.scopus.com/inward/record.url?scp=84973365228&partnerID=8YFLogxK
U2 - 10.1002/srin.201600107
DO - 10.1002/srin.201600107
M3 - Article
AN - SCOPUS:84973365228
VL - 88
SP - 271
EP - 280
JO - Steel research international
JF - Steel research international
SN - 1611-3683
IS - 2
ER -