Extrude-curving forming process of magnesium alloy thick plate coated with steel plate

Magnesium alloy thick plate is difficult to deform for its poor plasticity, especially in high deformation rate. This paper explored a new extrude-curving forming process, in which a steel plate was used to coat magnesium plate during the preparation of U-shape structural components. The results showed that the tension stress acted on local of thick plate was dangerous factor during new extrude-curving forming. The use of coating steel plate on magnesium alloy thick plate can change the stress state and decrease the tension stress acting magnesium alloy plate. U-shape structural components with high quality were achieved by this new extrude-curving forming process under proper procedure and warming-up temperature.