Load-Adapted Surface Modifications to Increase Lifetime of Forging Dies

authored by: Hanno Paschke, Martin Weber, Kai Brunotte, Marcel Rothgänger, Tom Petersen, Martin Siegmund, Julius Peddinghaus
Abstract: Diffusion treatments offer possibilities to enhance the performance and the service lifetime of hot forging tools. In combination with coating after nitriding, the surface layer hardness can be further increased. Within the scope of this study, a surface layer hardness above 2,000 HV0.005 was determined for borided or DLC (diamond-like carbon) coated surface layers. An increased surface layer hardness improves the abrasive wear resistance of forging dies. Furthermore, the plastic deformation of thermally softened forging die areas can be reduced. Beside these desirable effects, the ductility of diffusion treated or coated near surface layers is reduced and thermomechanical cracks are promoted. Therefore, additional approaches were developed to improve the thermomechanical crack behavior of forging dies. Patterned plasmanitriding by the use of coverages to prevent areas from nitrogen diffusion, new combination processes of plasmanitrocarburizing (PNC) followed by plasmanitriding (PN) and the innovative boriding were investigated on different abstraction levels. A system of several testing rigs was set up to enable the abstraction of the thermal shock conditions in different stages. The patterned nitriding, boriding and combination plasma process (PN + PNC) were evaluated in a series of industrial field tests to derive recommendations for suitable tool treatments.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
External Organisation(s): Fraunhofer-Institute for Surface Engineering and Thin Films (IST)
Type: Conference contribution
Pages: 1178-1187
No. of pages: 10
Publication date: 22.07.2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Materials Science(all), Mechanics of Materials, Mechanical Engineering
Electronic version(s): https://doi.org/10.4028/p-5l24m7 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{4ecd01c28c554d1493cc259d7663d407,
title = "Load-Adapted Surface Modifications to Increase Lifetime of Forging Dies",
abstract = "Diffusion treatments offer possibilities to enhance the performance and the service lifetime of hot forging tools. In combination with coating after nitriding, the surface layer hardness can be further increased. Within the scope of this study, a surface layer hardness above 2,000 HV0.005 was determined for borided or DLC (diamond-like carbon) coated surface layers. An increased surface layer hardness improves the abrasive wear resistance of forging dies. Furthermore, the plastic deformation of thermally softened forging die areas can be reduced. Beside these desirable effects, the ductility of diffusion treated or coated near surface layers is reduced and thermomechanical cracks are promoted. Therefore, additional approaches were developed to improve the thermomechanical crack behavior of forging dies. Patterned plasmanitriding by the use of coverages to prevent areas from nitrogen diffusion, new combination processes of plasmanitrocarburizing (PNC) followed by plasmanitriding (PN) and the innovative boriding were investigated on different abstraction levels. A system of several testing rigs was set up to enable the abstraction of the thermal shock conditions in different stages. The patterned nitriding, boriding and combination plasma process (PN + PNC) were evaluated in a series of industrial field tests to derive recommendations for suitable tool treatments.",
keywords = "boriding, diamond-like carbon, diffusion treatment, Forging, load adapted modification, thermal shock condition, wear",
author = "Hanno Paschke and Martin Weber and Kai Brunotte and Marcel Rothg{\"a}nger and Tom Petersen and Martin Siegmund and Julius Peddinghaus",
note = "Funding Information: The presented investigations are results of the completed industrial research projects: {"}Application of plasmaboriding processes to increase the thermal load resistance of forging dies{"} (19553 N), {"}Increasing the service life of nitrided forging dies by ductile surface layers to improve crack resistance{"} (19529 N) and {"}Adapted surface layer modifications to reduce thermal shock induced wear of forging dies{"} (19302 N) embedded into the program {"}Industrial collaborative research (IGF){"} funded by the Federal Ministry of Economics and Technology (BMWi) via the AiF. The authors thank the Federal Ministery of Economics and Technology for the financial support. Additional results presented in this paper were obtained within the project (BE 1691/194-1): “Investigation for the application of metallic DLC coatings as wear protection measure for forging dies“. The authors thank the German Research Foundation (DFG) for their financial support. Funding Information: The presented investigations are results of the completed industrial research projects: {"}Application of plasmaboriding processes to increase the thermal load resistance of forging dies{"} (19553 N), {"}Increasing the service life of nitrided forging dies by ductile surface layers to improve crack resistance{"} (19529 N) and {"}Adapted surface layer modifications to reduce thermal shock induced wear of forging dies{"} (19302 N) embedded into the program {"}Industrial collaborative research (IGF){"} funded by the Federal Ministry of Economics and Technology (BMWi) via the AiF. The authors thank the Federal Ministery of Economics and Technology for the financial support. Additional results presented in this paper were obtained within the project (BE 1691/194-1): “Investigation for the application of metallic DLC coatings as wear protection measure for forgingdies“. The authors thank the German Research Foundation (DFG) for their financial support.; 25th International Conference on Material Forming, ESAFORM 2022 ; Conference date: 27-04-2022 Through 29-04-2022",
year = "2022",
month = jul,
day = "22",
doi = "10.4028/p-5l24m7",
language = "English",
isbn = "9783035717594",
series = "Key Engineering Materials",
publisher = "Trans Tech Publications Ltd",
pages = "1178--1187",
editor = "Gabriela Vincze and Fr{\'e}d{\'e}ric Barlat",
booktitle = "Achievements and Trends in Material Forming- Peer-reviewed extended papers selected from the 25th International Conference on Material Forming, ESAFORM 2022",
}