Influence of intermediate annealing on Roping pattern, microstructure and properties of cold rolled 6016 aluminum alloy plate

doi:10.13251/j.issn.0254-6051.2021.11.025

Abstract

Abstract: Influence of intermediate annealing on Roping pattern, microstructure and properties of the 6016 aluminum alloy was investigated by using optical microscope and TEM. The hemming property of the plate was tested, and its microstructure was characterized. The results indicate that after intermediate annealing at 450 ℃ for 1 h, the banded distribution of grains with different orientations formed by rolling deformation in the matrix structure is weakened, and the uneven yield extension of the matrix structure is weakened. The intermediate annealing treatment at 450 ℃ makes the Roping pattern on the surface of 6016 aluminum alloy plate disappear completely, the hemming value is only 0.4, and the hemming property is the best. After intermediate annealing at 350 ℃ and 400 ℃, the surface coarse grain is obvious, and the grain size reaches 400-550 μm. The size and quantity of dispersed phase in the matrix are large, and the size reaches 50-100 nm. Coarse surface grains and a large number of precipitates at grain boundaries are the main reasons for the deterioration of hemming property.

Key words: 6016 aluminum alloy, Roping pattern, texture, properties, microstructure

CLC Number:

TG156.1

Li Dalin, Zhu Pengcheng, Wang Ping, Lü Zhengfeng, Zhang Shanshun. Influence of intermediate annealing on Roping pattern, microstructure and properties of cold rolled 6016 aluminum alloy plate[J]. Heat Treatment of Metals, 2021, 46(11): 157-160.

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