Effect of Al on austenite grain growth of SWRH62A steel

doi:10.13251/j.issn.0254-6051.2022.12.027

Abstract

Abstract: Effect of Al content on the austenite grain growth of SWRH62A steel during heating was investigated by using high temperature optical microscopy. The results show that addition of 0.015%-0.045% Al increases the grain boundary activation energy of the SWRH62A steel from 474.14 kJ/mol to 1175.73 kJ/mol, and decreases the austenite grain growth rate from 0.18 μm/℃ to 0.12 μm/℃ with a soaking temperature below 1050 ℃, which can significantly refine grains.

Key words: SWRH62A steel, grain size, high temperature metallographic, micro alloy, grain boundary, activation energy

CLC Number:

TG142.1

Wang Jintao, Li Zhanwei, Yu Xuesen, Zhang Yu. Effect of Al on austenite grain growth of SWRH62A steel[J]. Heat Treatment of Metals, 2022, 47(12): 158-161.

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