Abstract
The effect of modes of heterogenizing annealing (in the temperature range of 130 – 230°C with exposure of 6 – 24 h) before cold rolling on the grain size after recrystallization annealing of alloy 1565ch is determined. The mode of heterogenizing annealing, which provides formation of recrystallized grains less than 17 μm in size in sheets after rolling reduction of at most 50% and growth in the ductility characteristics of the alloy, is determined. The conditions of formation of recrystallized grains with a size below 10 μm and the parameters of treatment for a superplastic condition are obtained. The parameters of superplasticity of large-thickness sheets produced by the developed process are assessed.
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