Baoshan Iron & Steel Co., Ltd.

Mingzhe Bian

Shiwei Xu

Pijun Zhang

Haomin Jiang

Weineng Tang

Nick Birbilis

Zhuoran Zeng

Christopher Huw John Davies

Jianfeng Nie

Jian-Feng Nie

The present disclosure provides a high-efficient rolling process for magnesium alloy sheet. Parameters of the rolling process are: the rolling speed of each rolling pass is 10-50 m/min, the rolling reduction of each rolling pass is controlled to be 40-90%, and both the preheating temperature before rolling and the rolling temperature of each rolling pass are 250-450&#xb0; C. The present disclosure also provides a preparation method for magnesium alloy sheet, comprising: 1) preparing rolling billets; 2) high-efficient hot rolling; and 3) performing annealing. The rolling process can improve the mechanical performance especially, the strength and ductility of the sheet.

Rolling and preparation method of magnesium alloy sheet

A method of strengthening a dilute magnesium alloy sheet includes providing a dilute magnesium alloy sheet, which includes a magnesium alloy consisting essentially of (wt %): &#x3e;0 to 3.0 of Zn; &#x3e;0 to 1.5 of Ca; 0 to 1.0 of Zr; 0 to 1.3 of a rare earth element or mixture of the same; 0 to 0.3 of Sr; 0 to 0.7 of Al, the balance of Mg and other unavoidable impurities, wherein the total weight % of alloying elements is less than 3%; subjecting the dilute magnesium alloy sheet to plastic deformation, in which the tensile plastic strain should exceed 0.5%, but be less than 8% to form a pre-deformed magnesium alloy sheets; and subjecting the pre-deformed magnesium alloy sheets to an ageing treatment in a temperature range of 80 to 250&#xb0; C. for at least 1 minute, thereby forming a strengthened magnesium alloy sheet.

Strain-induced age strengthening in dilute magnesium alloy sheets

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Mingzhe Bian