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Microstructure and texture development during ring rolling of 100Cr6

Kristina Ryttberg (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Maria Knutson Wedel (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Lars Nyborg (Institutionen för material- och tillverkningsteknik, Yt- och mikrostrukturteknik) ; Patrik Dahlman
Ceramic Transactions: Materials Processing and Texture - 15th International Conference on Textures of Materials, ICOTOM 15; Pittsburgh, PA; United States; 1 June 2008 through 6 June 2008 Vol. 200 (2008), p. 301-309.
[Konferensbidrag, refereegranskat]

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.



Denna post skapades 2008-10-07. Senast ändrad 2016-08-15.
CPL Pubid: 74899