Warm forming is most commonly used in production of die forgings manufactured by precise forging. As compared with cold forming, using warm forging we are able to reduce size of forging forces considerably. The development of forging technology is connected to research of forgeability and plasticity of formed material at warm temperatures. The contribution brings a description of methodology used for determination of optimal forging temperature from recommended warm temperature interval concerning the chromium - manganic steel 16MnCr5. The mentioned steel is applicable for case hardening and manufacture of precise die forgings. In order to verify the steel forgeability within the recommended warm forging temperatures interval 600, 650, 700 a 750 Â°C the upsetting test according to Å½idek was used. The computer simulation of technologic test by means of program MSC.SuperForge confirmed correct selection of warm temperatures because testing samples showed good formability and after pressing in a notch area no cracks or defects were revealed. The crucial plasticity factor for selection of optimal warm temperature from examined temperature interval was a value of reduction of area determined by tensile test.
Warm Forming, Warm Temperature, Plasticity, Forgeability, Pressure test, Simulation
- M. Kapustova: Innovations in production trends for drop forging, 1st ed., Scientific Monographs, Hochschule Anhalt, KÃ¶then (2010), 86 p. ISBN 978-3-86011-034-8
- T. Altan, et al.: Cold and Hot Forging: Fundamentals and Applications (ASM International, Ohio 2005). ISBN 0-87170-805-1
- M. MilutinoviÄ, et al.: Precision forging - tool concepts and process design, in: Journal for Technology of Plasticity Vol. 33 No. 1-2 (2008), pp. 73-88 ISSN 0354-3870
- K. NovotnÃ½: Possibilities of warm forming application, FORM 2000, Brno (2000), pp. 211-213 ISBN 80-214-1661-0
- B. A. Behrens, et al.: Warm forging: new forming sequence for the manufacturing of long flat pieces, in: Production Engineering Research and Development No. 2 (2008), pp. 261-268
- I. HrivÅˆÃ¡k: Theory of weldability of metals and alloys, Materials Science Monographs 74. (Elsevier, Amsterdam-London-New York-Tokyo 1992). ISBN 0-44498707-X
- M. Forejt, M. PÃÅ¡ka: Theory of machining, forming and tools (CERM, Brno 2006). ISBN 80-214-2374-9
- R. S. Lee, J. L. Jou: Application of numerical simulation for wear analysis of warm forging die, in: Journal of material processing technology Vol.140 (2003), pp. 43-48
- L. KravÃ¡rik: Research on precision forging in closed dies. Dissertation theses. MTF STU, Trnava, (2012), 106 p.
- R. MoravÄÃk: Tool Steels of the Ledeburite Type, 1st Edition, Scientific Monographs, Dresden (2013), 111 p. ISBN 978-3-9808314-4
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