Aluminum &Aluminum alloy, due to the reasonable cost, mature techniques, rich supply ,lightweight as well as recycling, become the best choice of promoting green development all around world.  As high performance and diversification are widely used in transportation, mechanical equipment, packing, printing, building decoration, mouldmanufacture,cooker, electronics, oil refinery, power supply, aviation and so on.Now aluminum is a most produced in the world only second to iron, it has replaced many traditional materials in many areas.