Microstructure and texture development during ring rolling of 100Cr6
Paper in proceedings, 2008

Pre-turned 100Cr6 steel rings with spheroidised annealed microstructure have been cold ring rolled to two levels: expanding the outer diameter by 10 and 20%. The final microstructure was shown to be varying throughout the cross-section of the ring, where the largest deformation was found close to the surface of the inner diameter. This was reflected in the hardness profile showing the highest hardness values close to the inner surface. Scanning electron microscopy showed that the microstructure below the surface of the outer diameter consisted of a greatly refined ferrite. Close to the surface of the inner diameter the structure was even more refined. Electron back scatter diffraction together with X-ray diffractometry showed that cold ring rolling changed the existing texture of the ring blanks, where {110}-planes were parallel to the axial direction of the rings, towards {110}-planes becoming parallel to the rolling direction. This resulted in a weak {110}-texture. Close to the surface of the outer diameter the greatly refined ferrite had decomposed into a more random orientation distribution.

Author

Kristina Ryttberg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Maria Knutson Wedel

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Lars Nyborg

Chalmers, Materials and Manufacturing Technology, Surface and Microstructure Engineering

Patrik Dahlman

SKF Group

Ceramic Transactions

1042-1122 (ISSN)

Vol. 200 301-309

Subject Categories

Materials Engineering

Manufacturing, Surface and Joining Technology

Other Materials Engineering

ISBN

978-1-57498-296-1

More information

Created

10/7/2017