Details
| Original language | English |
|---|---|
| Title of host publication | Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018 |
| Editors | Gianluca Buffa, Livan Fratini, Giuseppe Ingarao, Rosa Di Lorenzo |
| ISBN (electronic) | 9780735416635 |
| Publication status | Published - 3 May 2018 |
| Event | 21st International ESAFORM Conference on Material Forming, ESAFORM 2018 - Palermo, Italy Duration: 23 Apr 2018 → 25 Apr 2018 |
Publication series
| Name | AIP Conference Proceedings |
|---|---|
| Volume | 1960 |
| ISSN (Print) | 0094-243X |
| ISSN (electronic) | 1551-7616 |
Abstract
Hot forging is an effective production method producing safety relevant parts with excellent mechanical properties. The economic efficiency directly depends on the occurring wear of the tools, which limits service lifetime. Several approaches of the presenting research group aim at minimizing the wear caused by interacting mechanical and thermal loads by using enhanced nitriding technology. Thus, by modifying the surface zone layer it is possible to create a resistance against thermal softening provoking plastic deformation and pronounced abrasive wear. As a disadvantage, intensely nitrided surfaces may possibly include the risk of increased crack sensitivity and therefore feature the chipping of material at the treated surface. Recent projects (evaluated in several industrial applications) show the high technological potential of adapted treatments: A first approach evaluated localized treatments by preventing areas from nitrogen diffusion with applied pastes or other coverages. Now, further ideas are to use this principle to structure the surface with differently designed patterns generating smaller ductile zones beneath nitrided ones. The selection of suitable designs is subject to certain geo-metrical requirements though. The intention of this approach is to prevent the formation and propagation of cracks under thermal shock conditions. Analytical characterization methods for crack sensitivity of surface zone layers and an accurate system of testing rigs for thermal shock conditions verified the treatment concepts. Additionally, serial forging tests using adapted testing geometries and finally, tests in the industrial production field were performed. Besides stabilizing the service lifetime and decreasing specific wear mechanisms caused by thermal influences, the crack behavior was influenced positively. This leads to a higher efficiency of the industrial production process and enables higher output in forging campaigns of industrial partners.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
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Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018. ed. / Gianluca Buffa; Livan Fratini; Giuseppe Ingarao; Rosa Di Lorenzo. 2018. 040016 (AIP Conference Proceedings; Vol. 1960).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Adapted diffusion processes for effective forging dies
AU - Paschke, H.
AU - Nienhaus, A.
AU - Brunotte, K.
AU - Petersen, T.
AU - Siegmund, M.
AU - Lippold, L.
AU - Weber, M.
AU - Mejauschek, M.
AU - Landgraf, P.
AU - Braeuer, G.
AU - Behrens, B. A.
AU - Lampke, T.
N1 - Funding information: The presented investigations are results of the completed and current industrial research projects: “Prognosetool f. Plasmanitrierproz. z. Randschichtbehandlung v. Werkzeugen und Bauteilen” (18741 N), “Anwendung v. Plasma-borierverfahren z. Steigerung der therm. Belastbarkeit v. Schmiedegesenken” (19553 N), “Steigerung d. Lebensdauer nitrierter Schmiedegesenke durch Realisierung duktiler Oberflaechenbereiche z. Verbesserung d. Rissbestaendigkeit” (19529 N), “Angepasste Randschichtmod. z. Reduzierung des thermoschockbedingten Verschleißes bei Schmiedege-senken” (19302 N) embedded into the program “Industrielle Gemeinschaftsfoerderung (IGF)” funded by the Federal Ministry of Economics and Technology (BMWi) via the AiF and “Untersuchungen z. Einsatzverh. erodierter und nitrierter Schmiedewerkzeuge” (BE 1691/23-3) funded by German Research Foundation (DFG). The authors thank the German Research Foundation and the Federal Ministery of Economics and Technology for the financial support.
PY - 2018/5/3
Y1 - 2018/5/3
N2 - Hot forging is an effective production method producing safety relevant parts with excellent mechanical properties. The economic efficiency directly depends on the occurring wear of the tools, which limits service lifetime. Several approaches of the presenting research group aim at minimizing the wear caused by interacting mechanical and thermal loads by using enhanced nitriding technology. Thus, by modifying the surface zone layer it is possible to create a resistance against thermal softening provoking plastic deformation and pronounced abrasive wear. As a disadvantage, intensely nitrided surfaces may possibly include the risk of increased crack sensitivity and therefore feature the chipping of material at the treated surface. Recent projects (evaluated in several industrial applications) show the high technological potential of adapted treatments: A first approach evaluated localized treatments by preventing areas from nitrogen diffusion with applied pastes or other coverages. Now, further ideas are to use this principle to structure the surface with differently designed patterns generating smaller ductile zones beneath nitrided ones. The selection of suitable designs is subject to certain geo-metrical requirements though. The intention of this approach is to prevent the formation and propagation of cracks under thermal shock conditions. Analytical characterization methods for crack sensitivity of surface zone layers and an accurate system of testing rigs for thermal shock conditions verified the treatment concepts. Additionally, serial forging tests using adapted testing geometries and finally, tests in the industrial production field were performed. Besides stabilizing the service lifetime and decreasing specific wear mechanisms caused by thermal influences, the crack behavior was influenced positively. This leads to a higher efficiency of the industrial production process and enables higher output in forging campaigns of industrial partners.
AB - Hot forging is an effective production method producing safety relevant parts with excellent mechanical properties. The economic efficiency directly depends on the occurring wear of the tools, which limits service lifetime. Several approaches of the presenting research group aim at minimizing the wear caused by interacting mechanical and thermal loads by using enhanced nitriding technology. Thus, by modifying the surface zone layer it is possible to create a resistance against thermal softening provoking plastic deformation and pronounced abrasive wear. As a disadvantage, intensely nitrided surfaces may possibly include the risk of increased crack sensitivity and therefore feature the chipping of material at the treated surface. Recent projects (evaluated in several industrial applications) show the high technological potential of adapted treatments: A first approach evaluated localized treatments by preventing areas from nitrogen diffusion with applied pastes or other coverages. Now, further ideas are to use this principle to structure the surface with differently designed patterns generating smaller ductile zones beneath nitrided ones. The selection of suitable designs is subject to certain geo-metrical requirements though. The intention of this approach is to prevent the formation and propagation of cracks under thermal shock conditions. Analytical characterization methods for crack sensitivity of surface zone layers and an accurate system of testing rigs for thermal shock conditions verified the treatment concepts. Additionally, serial forging tests using adapted testing geometries and finally, tests in the industrial production field were performed. Besides stabilizing the service lifetime and decreasing specific wear mechanisms caused by thermal influences, the crack behavior was influenced positively. This leads to a higher efficiency of the industrial production process and enables higher output in forging campaigns of industrial partners.
UR - http://www.scopus.com/inward/record.url?scp=85047356981&partnerID=8YFLogxK
U2 - 10.1063/1.5034870
DO - 10.1063/1.5034870
M3 - Conference contribution
AN - SCOPUS:85047356981
T3 - AIP Conference Proceedings
BT - Proceedings of the 21st International ESAFORM Conference on Material Forming, ESAFORM 2018
A2 - Buffa, Gianluca
A2 - Fratini, Livan
A2 - Ingarao, Giuseppe
A2 - Di Lorenzo, Rosa
T2 - 21st International ESAFORM Conference on Material Forming, ESAFORM 2018
Y2 - 23 April 2018 through 25 April 2018
ER -