制御圧延過程でのオーステナイトからフェライトへの変態温度の測定

概要

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For the purpose of measuring austenite-to-ferrite transformation temperatures in niobium-bearing steels during controlled rolling, various methods were investigated. The change in texture intensity as well as those in microstructure and strengths produced by deformation in the austenite-ferrite region was found to be useful for this purpose, those giving the same Ar_3 temperature. Ar_3 temperature rises with the increase in the amount of deformation in non-recrystallization region. The increment is, however, much larger for a coarse austenite grain structure than for a fine one. Regardless of the difference in initial austenite grain sizes, Ar_3 temperature reaches the same value when the deformation in non-recrystallization region is increased to ∿70%. The rise in Ar_3 temperature is due to strain-induced transformation and grain fragmentation caused by deformation bands.
社団法人日本鉄鋼協会の論文
1978-08-01