Effect of cold rolling reduction rate on texture and formability of IF steel after annealing treatment

doi:10.13251/j.issn.0254-6051.2024.10.021

Abstract

Abstract: The texture and formability of IF steel with different cold rolling reduction rates after annealing at 800 ℃ for 300 s were studied. The microstructure and texture of annealed specimens at different cold rolling reduction rates were measured by metallographic microscopy and electron backscatter diffraction (EBSD). The tensile tests of the IF steel specimens were carried out by means of universal tensile testing machine. The experimental results show that the recrystallization grain size decreases gradually with the increase of cold rolling reduction rate. The texture uniformity along the gamma-orientation line increases first and then decreases with the increase of cold rolling reduction rate. When the reduction rate is 75%, the uniform shape of the texture is optimal. By comparing the plastic strain ratio (r value) and anisotropy Δr of the different IF steel specimens, it can be seen that IF steel has the largest r value and the smallest anisotropy Δr when the cold rolling reduction rate is 75%. Therefore, it has excellent formability.

Key words: interstitial free steel, cold-rolled, texture, EBSD

CLC Number:

TG161

Ma Yi, Zhang Liwen, Song Kangjie, Luo Yalong, Miao Luyang, Zhang Chi, Wu Xin, Wang Yinzhou. Effect of cold rolling reduction rate on texture and formability of IF steel after annealing treatment[J]. Heat Treatment of Metals, 2024, 49(10): 121-125.

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