Setting an ultrafine grain at forged preforms by using cross wedge rolling
Final Report Abstract
During this reporting period, it was investigated whether the grain fineness of a cylindrical semifinished product can be improved by cross rolling and whether the ultra-fine grain specification can be achieved. In the first work package (WP), FE simulations were used to investigate whether a stable rolling process can be developed. A rolling process was set up which locally changed the shape of the semi-finished product in the first part and returned the second part to its original shape. Thus, the input and output shape was a cylinder. A parameter study was used to identify favorable rolling parameters, from which a parameter window to produce good parts was established and a parameter combination in the parameter window for the experimental investigation of WP 2 was selected. The investigation of the microstructure showed that rolling has a positive influence on the microstructural properties and thus confirmed previous theoretical investigations. The result of ultra-fine grain size could not be achieved.
Publications
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Ultrafeines Gefüge mittels Querkeilwalzen erzeugen. In: stahl + eisen 11/2020, Seite 60-61
Hedicke-Claus, Y.; Kriwall, M.; Stonis, M. & Behrens, B.-A.
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Verbesserung der Werkstoffeigenschaften durch Querkeilwalzen. In: Umformtechnik Massiv + Leichtbau
Hedicke-Claus, Y.; Langner, J.; Stonis, M. & Behrens, B.-A.
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Kornfeinung mittels Flachbackenwalzen. Zeitschrift für wirtschaftlichen Fabrikbetrieb, 118(7-8), 471-475.
Peter, Roe Christopher; Viertel, Lars; Kriwall, Mareile; Hedicke-Claus, Yorck; Stonis, Malte & Behrens, Bernd-Arno
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Feinkornwalzen – Kornfeinung durch Querwalzen. Zeitschrift für wirtschaftlichen Fabrikbetrieb, 119(7-8), 499-502.
Roe, Christopher Peter; Kriwall, Mareile; Stonis, Malte & Behrens, Bernd-Arno
