Hirofumi Miyaji1 and Satoshi Watanabe1
1National Research Institute for Metals, Tokyo
In order to clarify an influence of the distribution of the martensite phase in a hot-rolled sheet on the ridging phenomenon 17 Cr stainless steel, the effect of the homogenizing treatment at a temperature immediately above or under the region, in which both austenite and ferrite coexist, on the ridging phenomenon was investigated. The results are as follows.
(1) The uniform distribution of the martensite phase in a ferrite matrix was obtained by homogenizing and subsequent quenching.
(2) The favourable effect of the homogenizing treatment was confirmed from the fact that the ridging was prevented perfectly by this treatment. This treatment can randomize the texture almost completly also in the local region within a sheet.
(3) The occurrence of ridging can not be simply estimated from the texture determined by the usual pole figure method.
(4) Ridging phenomenon depends on the distribution feature of some texture components in a local region within a sheet and at the same time on thier size and shape.
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