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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Uhe, Johanna
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2024Numerical investigation of rotational friction welding for C22.8 - 41Cr4 joints using a substitute model
- 2024Prevention of scaling by means of recycled process waste gases
- 2023KNN-Entwicklung in der Halbwarmumformung/ANN development in semi-hot forming
- 2023Investigation of the joining zone formation of impact extruded hybrid components by varied forming sequence and partial cooling
- 2023Investigation of the joining zone formation of impact extruded hybrid components by varied forming sequence and partial coolingcitations
- 2023Modelling failure of joining zones during forming of hybrid parts
- 2022Comparison of the Joining Zone Development of Hybrid Semi-Finished Products after Different Extrusion Processes
- 2022Investigations on Additively Manufactured Stainless Bearingscitations
- 2022Tailored Forming of hybrid bulk metal components
- 2022Tailored Forming: Drucküberlagertes Warmfließpressen
- 2021Joining zone evaluation of hybrid semi-finished products after backward can extrusion
- 2021Numerical evaluation of forging process designs of a hybrid co-extruded demonstrator consisting of steel and aluminium.
- 2021Influence of degree of deformation on welding pore reduction in high-carbon steelscitations
- 2021Process chain for the manufacture of hybrid bearing bushingscitations
- 2021Challenges in the Forging of Steel-Aluminum Bearing Bushings
- 2021Contact Geometry Modification of Friction-Welded Semi-Finished Products to Improve the Bonding of Hybrid Componentscitations
- 2020Characterization and modeling of intermetallic phase formation during the joining of aluminum and steel in analogy to co-extrusion
- 2020Characterization and modeling of intermetallic phase formation during the joining of aluminum and steel in analogy to co-extrusioncitations
- 2020Numerical investigations regarding a novel process chain for the production of a hybrid bearing bushingcitations
- 2020Lateral angular co-extrusioncitations
- 2020Lateral angular co-extrusion: Geometrical and mechanical properties of compound profiles
- 2019Numerical modeling of the development of intermetallic layers between aluminium and steel during co-extrusioncitations
- 2017Mechanical properties of co-extruded aluminium-steel compounds
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document
Prevention of scaling by means of recycled process waste gases
Abstract
<jats:p>Abstract. During hot forging of steel materials, the blanks are subjected to various heating processes. During these processes, scale is formed, which can lead to a mass loss of up to 3%. The additional mass required to compensate this material loss for a given forging component has a significant impact on the process emissions, as the production of the billet material has the highest impact on the overall CO₂ footprint of metal forming products [1]. Additionally, descaling operations such as upsetting are required to guarantee forging quality and process stability. At the same time, large quantities of process waste gas are emitted in the production of raw materials and components. These burnt gases have lower oxygen concentration due to the prior chemical combustion reaction. This work addresses the question, whether these burnt gases can be utilized as a forging process atmosphere. This would not only reduce material loss, but would also result in a reuse of the process waste gas. In order to retrofit existing forging infrastructure, a tooling system with a gas-tight enclosure was constructed and realized in a forming press. Defined gas combinations were fed into the enclosure to create an oxygen-reduced atmosphere. First, different gas combinations were investigated in annealing tests. The three most promising ones were then selected for the forging tests. The enclosure contained a heating, transport, forming and collecting unit. The blanks were fed in through a magazine and inductively heated to 1200 °C, formed and cooled under the defined atmosphere. In each atmosphere, 100 components were forged from the material 42CrMo4. Furthermore, it was investigated whether forming under a gas atmosphere has an influence on tool wear as scale can act as an abrasive. The investigations showed that both the surface of the starting material and the oxygen concentration of the atmosphere have a significant influence on scale formation. The amount of scale formed was reduced by up to 74% compared to an oxygen atmosphere. The adhesive layer on the upper dies was reduced with decreasing oxygen concentration. On the lower dies was an increased adhesive build-up. </jats:p>