Manufacturing of β-Titanium Ti-10V-2Fe-3Al spin extruded hollow shafts for high strength power train applications in aerospace and automotive industries

Machai, C.^{1, a}; Biermann, D.^{1, b}

1)

Institut für Spanende Fertigung, Technische Universität Dortmund, Baroper Str. 301, 44227 Dortmund

a) machai@isf.de; b) biermann@isf.de

Kurzfassung

The aerospace and automobile sector strives to increase the efficiency of turbines and internal combustion engines. Fuel efficient engines demand components with a good combination of low mass and appropriate mechanical properties. Powertrain components consisting of a spinextruded hollow shaft made of β-titanium alloy offer high specific strength in addition to good fatigue and corrosion resistance. The process route for manufacturing the hollow β-titanium shaft consists of an incremental forming-process followed by a turning operation to remove surface damages induced by the preceding forming processes. The content of this paper are investigations of the machining operation of the undeformed titanium raw material and the heat treated material samples to develop suitable cutting data. Different tool materials and machining data are investigated with regard to the static and dynamic process forces and the tool wear. Further analyses consider surface quality and metallographic samples of the deformed chip.

Schlüsselwörter

β-titanium, machining, turning, spin extrusion, hollow shaft

Veröffentlichung

In: Proceedings of the TMS 2010, Volume 1: Materials Processing and Properties, 139th Annual Meeting and Exhibition, 14.2.-18.2. 2010, Seattle, USA, ISBN 978-0-87339-751-3, S. 307-314