Details
| Original language | English |
|---|---|
| Title of host publication | Tribology in Manufacturing Processes and Joining by Plastic Deformation II |
| Editors | Niels Bay, Chris V. Nielsen |
| Pages | 163-170 |
| Number of pages | 8 |
| Publication status | Published - 24 Apr 2018 |
| Event | 8th International Conference on Tribology in Manufacturing Processes and Joining by Plastic Deformation, ICTMP 2018 - Elsinore, Denmark Duration: 24 Jun 2018 → 26 Jun 2018 |
Publication series
| Name | Key Engineering Materials |
|---|---|
| Volume | 767 KEM |
| ISSN (Print) | 1013-9826 |
| ISSN (electronic) | 1662-9795 |
Abstract
Lubrication is essential in metal forming processes. As an example, it has a significant effect on the extent of homogeneity of forming and the resulting component surface. Thus, an adequate lubrication technique is required for a consistent part quality. In this contribution a new lubrication approach for cold bulk metal forming is presented. By exploiting the process-related porosity of powder metallurgical (PM) components as a lubricant storage, the resulting pressure of a forming process forces the stored oil to leak out lubricating the process. As a result, advantages like a decrease of process time because of the omission of the additional lubrication step, and an increased deformability due to compensation of lubricating film break are expected. Besides that, the porosity of the PM component is reduced leading to improved mechanical properties. Experimental investigations with cylindrical PM components were carried out by compression tests in dependence of initial porosity, impregnation time and lubricant. It was found that the required maximum load is reduced by up to 39 % by applying the new lubrication method. In addition, relative densities up to 99 % are reached after deformation.
Keywords
- Densification, Endogenous lubrication, Powder metallurgy, Upsetting
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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Tribology in Manufacturing Processes and Joining by Plastic Deformation II. ed. / Niels Bay; Chris V. Nielsen. 2018. p. 163-170 (Key Engineering Materials; Vol. 767 KEM).
Research output: Chapter in book/report/conference proceeding › Conference contribution › Research › peer review
}
TY - GEN
T1 - Experimental Investigation of Endogenous Lubrication during Cold Upsetting of Sintered Powder Metallurgical Components
AU - Behrens, Bernd Arno
AU - Brunotte, Kai
AU - Bohr, Dieter
N1 - Funding Information: The presented results are based on the research project “Substitution of conventional mold lubrication by using self-lubricating raw parts in sinter forging”, Project number Be1691 184-1. The authors would like to thank the German Research Foundation (DFG) for the financial support. Publisher Copyright: © 2018 Trans Tech Publications, Switzerland.
PY - 2018/4/24
Y1 - 2018/4/24
N2 - Lubrication is essential in metal forming processes. As an example, it has a significant effect on the extent of homogeneity of forming and the resulting component surface. Thus, an adequate lubrication technique is required for a consistent part quality. In this contribution a new lubrication approach for cold bulk metal forming is presented. By exploiting the process-related porosity of powder metallurgical (PM) components as a lubricant storage, the resulting pressure of a forming process forces the stored oil to leak out lubricating the process. As a result, advantages like a decrease of process time because of the omission of the additional lubrication step, and an increased deformability due to compensation of lubricating film break are expected. Besides that, the porosity of the PM component is reduced leading to improved mechanical properties. Experimental investigations with cylindrical PM components were carried out by compression tests in dependence of initial porosity, impregnation time and lubricant. It was found that the required maximum load is reduced by up to 39 % by applying the new lubrication method. In addition, relative densities up to 99 % are reached after deformation.
AB - Lubrication is essential in metal forming processes. As an example, it has a significant effect on the extent of homogeneity of forming and the resulting component surface. Thus, an adequate lubrication technique is required for a consistent part quality. In this contribution a new lubrication approach for cold bulk metal forming is presented. By exploiting the process-related porosity of powder metallurgical (PM) components as a lubricant storage, the resulting pressure of a forming process forces the stored oil to leak out lubricating the process. As a result, advantages like a decrease of process time because of the omission of the additional lubrication step, and an increased deformability due to compensation of lubricating film break are expected. Besides that, the porosity of the PM component is reduced leading to improved mechanical properties. Experimental investigations with cylindrical PM components were carried out by compression tests in dependence of initial porosity, impregnation time and lubricant. It was found that the required maximum load is reduced by up to 39 % by applying the new lubrication method. In addition, relative densities up to 99 % are reached after deformation.
KW - Densification
KW - Endogenous lubrication
KW - Powder metallurgy
KW - Upsetting
UR - http://www.scopus.com/inward/record.url?scp=85046441480&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/kem.767.163
DO - 10.4028/www.scientific.net/kem.767.163
M3 - Conference contribution
AN - SCOPUS:85046441480
SN - 9783035712995
T3 - Key Engineering Materials
SP - 163
EP - 170
BT - Tribology in Manufacturing Processes and Joining by Plastic Deformation II
A2 - Bay, Niels
A2 - Nielsen, Chris V.
T2 - 8th International Conference on Tribology in Manufacturing Processes and Joining by Plastic Deformation, ICTMP 2018
Y2 - 24 June 2018 through 26 June 2018
ER -