The mechanism of recrystallization texture development is changed by the chemical composition of materials, cold-rolling reduction, and annealing conditions. This study discusses the development of recrystallization texture for severely cold-rolled pure iron. In cold-rolled iron with 99.8% reduction, the deformation texture was a strong α-fiber (RD// < 011 > ) with high strain. During annealing in a temperature range from 20°C to 800°C, in this highly strained α-fiber, the microstructure started to recover from a low temperature. Thereafter, recrystallized grains began to appear at 350°C, and many recrystallized grains were generated at random locations. Their textural components were {100}, {211}, {111}, and {411}, which were already included in the α-fiber. At 550°C, recrystallization was completed, and the resulting recrystallization texture was similar to the original cold-rolling texture. This texture was developed by unique microstructural changes, which could be classified as continuous recrystallization. During grain growth stage, the recrystallization texture changed into the {100} < 012 > component presumably by the selective growth of recrystallized grains governed by the size effect.

緒言The mechanism of recrystallization texture development is changed by the chemical composition of materials, cold-rolling reduction, and annealing treatment conditions. In this paper, we have discussed the development of the recrystallization texture for cold-rolled iron with 99.8% reduction.In cold-rolled iron with 99.8% reduction, the deformation texture was a strong α-fiber (RD//<110>) with high strain. During annealing in a temperature range from 200 to 800˚C, in this highly strained α-fiber, the microstructure started to recover from quite a low temperature. Then recrystallized grains began to appear at 350˚C, and many recrystallized grains were generated at rather random locations. Their textural components were {100}, {211}, {111}, and {411}, which were included in the α-fiber. At 550˚C, recrystallization was completed, and the texture after full recrystallization was similar to that of the cold-rolled iron. This texture developed by unique microstructural changes, which could be classified into continuous recrystallization. The recrystallization texture: α-fiber was changed into the {100}<012> component by selective growth of recrystallized grains following the completion of recrystallization.

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