抄録
Ridging phenomenon of 18% Cr stainless steel is studied in connection with the segregation-pattern of Cr and C which shows undulations very similar to the ridging on the transverse section of hot rolled and cold rolled sheet.
(1) A laminated segregation pattern is observed at the center layer of transverse cross-section of hot rolled sheet. The segregation-pattern becomes wavy and extends through the thickness of cold rolled and annealed sheet.
(2) The segregation-pattern shows undulations very similar to the profile of ridging after stretching of 20% in the rolling direction.
(3) The height of ridging is well correlated with that of undulated segregation-pattern.
(4) Ridging phenomenon is thought to be a manifestation of underlying pattern of undulated segregation of Cr and C, which is farmed and retained in the hot and cold rolling process, by tensile elongation.
