Heat treatment process of 6014 aluminum alloy cold rolled sheets for automobile

doi:10.13251/j.issn.0254-6051.2024.07.051

Abstract

Abstract: Effect of solution treatment time on mechanical properties, electrical conductivity and microstructure of 6014 aluminum alloy cold-rolled sheet after artificial aging at 170 ℃ for 12 h was studied using room temperature stretching, electrical conductivity measurement, metallographic microscopy (OM) and scanning electron microscopy (SEM). The results show that with the extension of solution treatment time, the black Mg₂Si phase gradually dissolves back, and the size of the rich iron phase gradually decreases. When the solution treatment time is 120 min, β-Al₅FeSi phase to α-AlFeSi phases transition process is basically completed. The trend of the tensile properties is first increasing, then remaining unchanged, and then decreasing. When the solution time is 10 min, the properties of the aged sheets is the best, with tensile strength of 321.33 MPa, yield strength of 300.26 MPa, elongation of 10.93%, and conductivity of 51.53%IACS.

Key words: 6014 aluminum alloy, heat treatment, mechanical properties, microstructure

CLC Number:

Zhang Xinyu, Sui Xin, Luo Xudong, Cheng Suling, Zhang Yi, Chen Jinsheng, Zhang Wei. Heat treatment process of 6014 aluminum alloy cold rolled sheets for automobile[J]. Heat Treatment of Metals, 2024, 49(7): 331-335.

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