Yates, L.J. (1980). Some Effects of Friction and Lubrication During Hot Forging Steel. Masters thesis, Aston University.
Abstract
A thorough literature search showed that there is no satisfactory test to aid the selection of a lubricant in hot forging of steel. Lubricant effectiveness under difficult forging conditions has therefore been investigated. An experimental test rig was designed, developed and constructed in which hot specimens of temperature 900°C to 1300°C were forged. The forging condition was such that as in industry a lubricant would be used. Stresses were monitored by means of a Wheatstone bridge network using resistance strain gauges in conjunction with an ultra violet recorder (U.V.R.). The findings were critically compared with previous investigations on friction during hot forging. Relationships between the known conventional values for the co-efficient of friction and the force required to eject from a conical die were considered. reduction in the ejection load when using a lubricant was consistently demonstrated. The results confirmed that the concept of a simple numerical value of a co-efficient of friction, could not be applied to practical not working operations. Regression analysis techniques were therefore employed to examine the results in order to find relationships between variables. Changes in the 'slug' temperature, lubricated or dry condition and die draft angle were made and significant differences in forging loads were obtained. A method for measuring lubricant effectiveness by direct comparison of loads for a dry condition and lubricated condition is suggested. Key Words: Hot Forging - Steel - Lubrication - Friction
| Divisions: | College of Engineering & Physical Sciences > Aston Institute of Materials Research (AIMR) |
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| Additional Information: | Copyright © L.J. Yates, 1980. L.J.Yates asserts their moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately. |
| Institution: | Aston University |
| Uncontrolled Keywords: | friction and lubrication,hot forging steel |
| Last Modified: | 30 Sep 2024 08:21 |
| Date Deposited: | 19 Mar 2014 16:30 |
| Completed Date: | 1980-01 |
| Authors: |
Yates, L.J.
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