Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 22nd International ESAFORM Conference on Material Forming |
| Subtitle of host publication | ESAFORM 2019 |
| Editors | Pedro Arrazola, Eneko Saenz de Argandona, Nagore Otegi, Joseba Mendiguren, Mikel Saez de Buruaga, Aitor Madariaga, Lander Galdos |
| Number of pages | 7 |
| ISBN (electronic) | 9780735418479 |
| Publication status | Published - 2 Jul 2019 |
| Event | 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019 - Vitoria-Gasteiz, Spain Duration: 8 May 2019 → 10 May 2019 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Number | 1 |
| Volume | 2113 |
| ISSN (Print) | 0094-243X |
| ISSN (electronic) | 1551-7616 |
Abstract
A cold roll bonding (CRB) process for the symmetrical bonding of two sheets of the steel DX-51 (1.0226) with a galvanized zinc coating is presented. The coating was applied to form an intermediate layer between the two steel substrates during the bonding. The study is divided in two sections describing the role of the heat treatment prior to the CRB process (heat pre-treatment) as well as after the CRB process (heat post-treatment). The filming theory supposes that for establishing a firm bond, the superficial layers should feature an increased hardness in comparison to the substrate to overcome the oxide film on the surface. Since zinc is more ductile than iron, a bonding of galvanized steel sheets according to this mechanism is rather unlikely. By applying a heat pre-treatment prior to the roll bonding, the formation of brittle intermetallic Fe and Zn phases can be facilitated. These brittle phases fracture during rolling, and thus, allow for a contact of the juvenile formed steel layers. Within this study, steel sheets were heat pre-treated in an oxygen-free atmosphere in the temperature range from 450 °C to 550 °C. Additionally, the influence of the coating's thickness was investigated. A heat post-treatment was performed to strengthen the bond by increased diffusion activity. The influence of the zinc diffusivity was analyzed by heat treatment of the bonded samples in the relevant temperature range for zinc diffusion at 180 °C. The bonds were analyzed by scanning electron microscopy and tensile shear tests.
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Ecology, Evolution, Behavior and Systematics
- Environmental Science(all)
- Ecology
- Agricultural and Biological Sciences(all)
- Plant Science
- Physics and Astronomy(all)
- General Physics and Astronomy
- Environmental Science(all)
- Nature and Landscape Conservation
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Proceedings of the 22nd International ESAFORM Conference on Material Forming: ESAFORM 2019. ed. / Pedro Arrazola; Eneko Saenz de Argandona; Nagore Otegi; Joseba Mendiguren; Mikel Saez de Buruaga; Aitor Madariaga; Lander Galdos. 2019. 050017 (AIP Conference Proceedings; Vol. 2113, No. 1).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - The Role of Heat-Treatments performed before and after a Cold Roll Bonding Process of Galvanized Steel Sheets
AU - Hordych, Illia
AU - Herbst, Sebastian
AU - Nürnberger, Florian
AU - Schmidt, Hans Christian
AU - Orive, Alejandro Gonzalez
AU - Homberg, Werner
AU - Grundmeier, Guido
AU - Maier, Hans Jürgen
N1 - Funding information: The present study is funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) – project number 227635593 within the SPP 1640 framework. For the assistance with the rolling experiments, special thanks go to Dr. M. Rodman, A. Hausmann and S. Werwein.
PY - 2019/7/2
Y1 - 2019/7/2
N2 - A cold roll bonding (CRB) process for the symmetrical bonding of two sheets of the steel DX-51 (1.0226) with a galvanized zinc coating is presented. The coating was applied to form an intermediate layer between the two steel substrates during the bonding. The study is divided in two sections describing the role of the heat treatment prior to the CRB process (heat pre-treatment) as well as after the CRB process (heat post-treatment). The filming theory supposes that for establishing a firm bond, the superficial layers should feature an increased hardness in comparison to the substrate to overcome the oxide film on the surface. Since zinc is more ductile than iron, a bonding of galvanized steel sheets according to this mechanism is rather unlikely. By applying a heat pre-treatment prior to the roll bonding, the formation of brittle intermetallic Fe and Zn phases can be facilitated. These brittle phases fracture during rolling, and thus, allow for a contact of the juvenile formed steel layers. Within this study, steel sheets were heat pre-treated in an oxygen-free atmosphere in the temperature range from 450 °C to 550 °C. Additionally, the influence of the coating's thickness was investigated. A heat post-treatment was performed to strengthen the bond by increased diffusion activity. The influence of the zinc diffusivity was analyzed by heat treatment of the bonded samples in the relevant temperature range for zinc diffusion at 180 °C. The bonds were analyzed by scanning electron microscopy and tensile shear tests.
AB - A cold roll bonding (CRB) process for the symmetrical bonding of two sheets of the steel DX-51 (1.0226) with a galvanized zinc coating is presented. The coating was applied to form an intermediate layer between the two steel substrates during the bonding. The study is divided in two sections describing the role of the heat treatment prior to the CRB process (heat pre-treatment) as well as after the CRB process (heat post-treatment). The filming theory supposes that for establishing a firm bond, the superficial layers should feature an increased hardness in comparison to the substrate to overcome the oxide film on the surface. Since zinc is more ductile than iron, a bonding of galvanized steel sheets according to this mechanism is rather unlikely. By applying a heat pre-treatment prior to the roll bonding, the formation of brittle intermetallic Fe and Zn phases can be facilitated. These brittle phases fracture during rolling, and thus, allow for a contact of the juvenile formed steel layers. Within this study, steel sheets were heat pre-treated in an oxygen-free atmosphere in the temperature range from 450 °C to 550 °C. Additionally, the influence of the coating's thickness was investigated. A heat post-treatment was performed to strengthen the bond by increased diffusion activity. The influence of the zinc diffusivity was analyzed by heat treatment of the bonded samples in the relevant temperature range for zinc diffusion at 180 °C. The bonds were analyzed by scanning electron microscopy and tensile shear tests.
UR - http://www.scopus.com/inward/record.url?scp=85068844367&partnerID=8YFLogxK
U2 - 10.1063/1.5112581
DO - 10.1063/1.5112581
M3 - Conference contribution
AN - SCOPUS:85068844367
T3 - AIP Conference Proceedings
BT - Proceedings of the 22nd International ESAFORM Conference on Material Forming
A2 - Arrazola, Pedro
A2 - Saenz de Argandona, Eneko
A2 - Otegi, Nagore
A2 - Mendiguren, Joseba
A2 - Saez de Buruaga, Mikel
A2 - Madariaga, Aitor
A2 - Galdos, Lander
T2 - 22nd International ESAFORM Conference on Material Forming, ESAFORM 2019
Y2 - 8 May 2019 through 10 May 2019
ER -