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Determining process parameters for successful material reclamation of lead-free brass chips using hot forging operations: Lubrication

Johansson, J. LU ; Gutnichenko, O. LU ; Ståhl, J. E. LU ; Bushlya, V. LU and Schultheiss, F. LU (2019) 26th CIRP Conference on Life Cycle Engineering, LCE 2019 In Procedia CIRP 80. p.108-113
Abstract

When small and hollow components are being manufactured, it is not uncommon that a majority of the workpiece material is removed by machining. A demand for parts made with lead-free brass alloys can potentially increase the manufacturing cost and therefore it is necessary to investigate ways to increase the material utilization. As part of a more resource efficient production, a method for reusing chips from metal cutting in brass using hot forging operations is investigated. In this study, the brass alloy CW724R is used. Different lubrication agents are used, including mineral oil and vegetable oil with and without addition of nano-sized graphite platelets, GnP, in the production of green compacts. Material properties of the green... (More)

When small and hollow components are being manufactured, it is not uncommon that a majority of the workpiece material is removed by machining. A demand for parts made with lead-free brass alloys can potentially increase the manufacturing cost and therefore it is necessary to investigate ways to increase the material utilization. As part of a more resource efficient production, a method for reusing chips from metal cutting in brass using hot forging operations is investigated. In this study, the brass alloy CW724R is used. Different lubrication agents are used, including mineral oil and vegetable oil with and without addition of nano-sized graphite platelets, GnP, in the production of green compacts. Material properties of the green compacts and the finished products are analyzed using mechanical testing and microscopy. Quality of the finished product is evaluated using multi-variable regression analysis. The results of the statistical analysis indicate the best mechanical properties when using 0.2 - 0.25 vol. % GnP suspension in oil and 0.15 - 0.2 wt. % oil mixed with the chips before compaction. Microscopy shows diffusion bonding between the chips after forging, yet some porosities is still observed. This indicates potential for the investigated material reclamation method.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hot Forging, Lead-Free Brass, Material Reclaimation, Resource Efficient Production
in
Procedia CIRP
volume
80
pages
6 pages
publisher
Elsevier
conference name
26th CIRP Conference on Life Cycle Engineering, LCE 2019
conference location
West Lafayette, United States
conference dates
2019-05-07 - 2019-05-09
external identifiers
  • scopus:85067209998
ISSN
2212-8271
DOI
10.1016/j.procir.2019.01.086
language
English
LU publication?
yes
id
9ed4d19d-6003-414a-b19a-7014f11afb69
date added to LUP
2019-06-28 15:35:14
date last changed
2020-01-13 02:08:54
@article{9ed4d19d-6003-414a-b19a-7014f11afb69,
  abstract     = {<p>When small and hollow components are being manufactured, it is not uncommon that a majority of the workpiece material is removed by machining. A demand for parts made with lead-free brass alloys can potentially increase the manufacturing cost and therefore it is necessary to investigate ways to increase the material utilization. As part of a more resource efficient production, a method for reusing chips from metal cutting in brass using hot forging operations is investigated. In this study, the brass alloy CW724R is used. Different lubrication agents are used, including mineral oil and vegetable oil with and without addition of nano-sized graphite platelets, GnP, in the production of green compacts. Material properties of the green compacts and the finished products are analyzed using mechanical testing and microscopy. Quality of the finished product is evaluated using multi-variable regression analysis. The results of the statistical analysis indicate the best mechanical properties when using 0.2 - 0.25 vol. % GnP suspension in oil and 0.15 - 0.2 wt. % oil mixed with the chips before compaction. Microscopy shows diffusion bonding between the chips after forging, yet some porosities is still observed. This indicates potential for the investigated material reclamation method.</p>},
  author       = {Johansson, J. and Gutnichenko, O. and Ståhl, J. E. and Bushlya, V. and Schultheiss, F.},
  issn         = {2212-8271},
  language     = {eng},
  month        = {05},
  pages        = {108--113},
  publisher    = {Elsevier},
  series       = {Procedia CIRP},
  title        = {Determining process parameters for successful material reclamation of lead-free brass chips using hot forging operations: Lubrication},
  url          = {http://dx.doi.org/10.1016/j.procir.2019.01.086},
  doi          = {10.1016/j.procir.2019.01.086},
  volume       = {80},
  year         = {2019},
}