Heat treatment process for improving electromagnetic shielding performance of high-strength wrought magnesium alloy

The invention provides a heat treatment process for improving the electromagnetic shielding performance of high-strength wrought magnesium alloy, which comprises the steps of: carrying out solution treatment on a magnesium alloy board treated by extrusion plastic deformation at 380-420 DEG C, and carrying out heat preservation for 4-6 hours; carrying out water quenching till room temperature is achieved; then, heating up to 130-190 DEG C for aging, carrying out heat preservation for 4-50 hours, and cooling to the room temperature by air; and directly heating the magnesium alloy board up to 130-200 DEG C for aging, carrying out heat preservation for 4-90 hours, and cooling to the room temperature by air. The process provided by the invention can remarkably improve the electromagnetic shielding performance of the high-strength wrought magnesium alloy when guaranteeing good mechanical property. After being treated by the heat treatment technology, the wrought magnesium alloy is wide in application scope and can meet the actual demand of fields such as 3C (computer, communication and consumer electronic) products, aerospace, national defense military industry and the like; furthermore, the heat treatment technology is simple in equipment, lower in cost and easy to operate.