Details
| Originalsprache | Englisch |
|---|---|
| Titel des Sammelwerks | 31st International Conference on Metallurgy and Materials, METAL 2022 |
| Seiten | 233-238 |
| Seitenumfang | 6 |
| ISBN (elektronisch) | 9788088365068 |
| Publikationsstatus | Veröffentlicht - 30 Juni 2022 |
| Veranstaltung | 31st International Conference on Metallurgy and Materials, METAL 2022 - Brno, Tschechische Republik Dauer: 18 Mai 2022 → 19 Mai 2022 |
Publikationsreihe
| Name | International Conference on Metallurgy and Materials |
|---|---|
| ISSN (elektronisch) | 2694-9296 |
Abstract
The surface layer of hot working tools is subject to alternating thermo-mechanical loads during forging. It experiences a fast increase in temperature on contact with the heated billets, followed by a steep temperature decline during application of the spray-coolant. This can lead to a cyclic surface rehardening of the tool surface layer due to the formation of a martensitic structure, which can either delay or accelerate tool failure. The microstructural changes in the tool surface layer mainly depend on the thermal, mechanical and tribological loads during forging. The influence of these loads is of particular interest to understand the effect of cyclic surface rehardening. The goal of this research is to investigate the influence of cooling parameters on microstructural changes in the tool surface layer during die forging. Mechanical and tribological loads are kept constant while cooling parameters are varied. Three internal thermocouples are applied to forging tools to measure the base tool temperature. To keep the amount of lubricant in each forging cycle at constant levels, cooling and lubrication are separated by use of boron nitride as lubricant, which is applied by electrostatic adherence. For cooling, the duration of water application is varied while maintaining pressure and spray pattern. Fourtools with differenttool base temperatures are investigated and the influence of the thermal loads on the wear behaviour displayed.
ASJC Scopus Sachgebiete
- Ingenieurwesen (insg.)
- Werkstoffmechanik
- Werkstoffwissenschaften (insg.)
- Metalle und Legierungen
- Werkstoffwissenschaften (insg.)
- Oberflächen, Beschichtungen und Folien
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- BibTex
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31st International Conference on Metallurgy and Materials, METAL 2022. 2022. S. 233-238 (International Conference on Metallurgy and Materials).
Publikation: Beitrag in Buch/Bericht/Sammelwerk/Konferenzband › Aufsatz in Konferenzband › Forschung › Peer-Review
}
TY - GEN
T1 - Influence of cooling parameters on the surface layer structure of hot working tools
AU - Behrens, Bernd Arno
AU - Brunotte, Kai
AU - Peddinghaus, Julius
AU - Lorenz, Uwe
N1 - Funding Information: The presented investigations are carried out within the project ID 349885770 "Influence of cooling of forging dies on the process-related microstructural changes in the surface zone and their effect on wear behaviour" of the German Research Foundation (DFG). We are thankful for the assistance provided.
PY - 2022/6/30
Y1 - 2022/6/30
N2 - The surface layer of hot working tools is subject to alternating thermo-mechanical loads during forging. It experiences a fast increase in temperature on contact with the heated billets, followed by a steep temperature decline during application of the spray-coolant. This can lead to a cyclic surface rehardening of the tool surface layer due to the formation of a martensitic structure, which can either delay or accelerate tool failure. The microstructural changes in the tool surface layer mainly depend on the thermal, mechanical and tribological loads during forging. The influence of these loads is of particular interest to understand the effect of cyclic surface rehardening. The goal of this research is to investigate the influence of cooling parameters on microstructural changes in the tool surface layer during die forging. Mechanical and tribological loads are kept constant while cooling parameters are varied. Three internal thermocouples are applied to forging tools to measure the base tool temperature. To keep the amount of lubricant in each forging cycle at constant levels, cooling and lubrication are separated by use of boron nitride as lubricant, which is applied by electrostatic adherence. For cooling, the duration of water application is varied while maintaining pressure and spray pattern. Fourtools with differenttool base temperatures are investigated and the influence of the thermal loads on the wear behaviour displayed.
AB - The surface layer of hot working tools is subject to alternating thermo-mechanical loads during forging. It experiences a fast increase in temperature on contact with the heated billets, followed by a steep temperature decline during application of the spray-coolant. This can lead to a cyclic surface rehardening of the tool surface layer due to the formation of a martensitic structure, which can either delay or accelerate tool failure. The microstructural changes in the tool surface layer mainly depend on the thermal, mechanical and tribological loads during forging. The influence of these loads is of particular interest to understand the effect of cyclic surface rehardening. The goal of this research is to investigate the influence of cooling parameters on microstructural changes in the tool surface layer during die forging. Mechanical and tribological loads are kept constant while cooling parameters are varied. Three internal thermocouples are applied to forging tools to measure the base tool temperature. To keep the amount of lubricant in each forging cycle at constant levels, cooling and lubrication are separated by use of boron nitride as lubricant, which is applied by electrostatic adherence. For cooling, the duration of water application is varied while maintaining pressure and spray pattern. Fourtools with differenttool base temperatures are investigated and the influence of the thermal loads on the wear behaviour displayed.
KW - Bulk metal forming
KW - cooling
KW - surface zone rehardening
KW - wear
UR - http://www.scopus.com/inward/record.url?scp=85144114890&partnerID=8YFLogxK
U2 - 10.37904/metal.2022.4391
DO - 10.37904/metal.2022.4391
M3 - Conference contribution
AN - SCOPUS:85144114890
T3 - International Conference on Metallurgy and Materials
SP - 233
EP - 238
BT - 31st International Conference on Metallurgy and Materials, METAL 2022
T2 - 31st International Conference on Metallurgy and Materials, METAL 2022
Y2 - 18 May 2022 through 19 May 2022
ER -