Effect of Modes of Heterogenizing Annealing Before Cold Rolling on the Structure and Properties of Sheets from Alloy 1565ch


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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.

About the authors

M. S. Kishchik

National Research Technological University “MISiS,”

Email: mihaylovskaya@misis.ru
Russian Federation, Moscow

A. V. Mikhailovskaya

National Research Technological University “MISiS,”

Author for correspondence.
Email: mihaylovskaya@misis.ru
Russian Federation, Moscow

A. D. Kotov

“Higher School of Economics”, National Research University

Email: mihaylovskaya@misis.ru
Russian Federation, Moscow

A. M. Drits

“Alcoa SMZ” Company

Email: mihaylovskaya@misis.ru
Russian Federation, Moscow

V. K. Portnoy

National Research Technological University “MISiS,”

Email: mihaylovskaya@misis.ru
Russian Federation, Moscow

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