Transactions of Materials and Heat Treatment

Title：Influence of hot rolling on microstructure and properties of AZ31 magnesium alloy sheet processed by continuous extrusion

Authors： Chen Chongyang Guo Lili

Unit： Dalian Jiaotong University

KeyWords： AZ31 magnesium alloy continuous extrusion hot rolling mechanical properties texture

ClassificationCode：TG339

year,vol(issue):pagenumber：2019,44(9):17-22

Abstract：

The AZ31 magnesium alloy sheet with 8 mm thickness processed by continuous extrusion was thinned by hot rolling, and the AZ31 magnesium alloy sheet with good surface quality was obtained by experiments. Then, the change rules of its microstructure and pole intensity of (0002) basal texture after rolling were studied, and the tensile mechanical properties of the hot rolled sheet after annealing were analyzed. The results show that the microstructure uniformity of the hot rolled AZ31 magnesium alloy sheet is modified, and the average grain size is 9 μm. Therefore, the properties of sheet metal are significantly improved, namely, the tensile strength is 266.4 MPa and the elongation is 10.2%. The average grain size of 7.4 μm is obtained after annealing at 300 ℃ for 1 h, and the mechanical properties are significantly improved again with the tensile strength of 257.3 MPa and the elongation of 27.0%. In addition, the (0002) basal texture of hot rolled sheet is improved, and the pole intensity increases gradually with the increasing of rolling pass.

Funds：

国家自然科学基金资助项目（51401043）

陈重阳(1993-),女, 硕士研究生 E-mail：chenchongyang444@163.com 通讯作者：郭丽丽(1974-),女,博士, 副教授 E-mail：guolili@djtu.edu.cn

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