Analyse des Eigenspannungszustands in der Bohrungsrandzone tiefgebohrter Probekörper aus 42CrMo4+QT und X5CrNi18-10

Strodick, S.1, a; Walther, F.1, b; Schmidt, R.2, c; Zabel, A.2, d; Biermann, D.2, e

1)
Fachgebiet Werkstoffprüftechnik (WPT), TU Dortmund
2)
Institut für Spanende Fertigung, Technische Universität Dortmund, Baroper Str. 303, 44227 Dortmund

a) simon.strodick@tu-dortmund.de; b) frank.walther@tu-dortmund.de; c) robert2.schmidt@tu-dortmund.de; d) andreas.zabel@tu-dortmund.de; e) dirk.biermann@tu-dortmund.de

Kurzfassung

The production of BTA deep-drilled components proves to be very cost-intensive due to high component lengths of up to l = 10 m and high-quality requirements. At the same time, the demand for products from areas such as petrochemistry and petroleum exploration remains strong. Consequently, there is a large request for fast, reliable and non-destructive characterization of bore quality. Against this backdrop, the conditioning of the surface edge zone by the drilling process is of major importance. The residual stresses in the surface edge zone of BTA deep-drilled specimens made of the quenched and tempered steel 42CrMo4+QT and the austenitic steel X5CrNi18-10 were investigated. For this purpose, analyses of the magnetic Barkhausen noise and X-ray diffraction measurements of the residual stresses were performed. The results show that in the drilling process significant residual compressive stresses are built up in the surface edge zone of the bore. In addition, significant differences in the intensity of the residual stresses between the investigated materials were observed.

Veröffentlichung

Werkstoffprüfung 2019 - Fortschritte in der Werkstoffprüfung für Forschung und Praxis, Hrsg.: Christ, H.-J., INVENTUM GmbH, ISBN 978-3-88355-418-1, (2019), S. 287-292