某些硬铝及超硬铝的力学性能已接近普通钢材。铝合金较，耐蚀，耐磨性及抗振性好，在汽车、拖拉机及林业机械中应用较广。为了提高产品的力学性能，铝合金普遍采用淬火及时效工艺。在大生产中，因护大料多，淬火时常常出现材料力学性能偏低，整根或局都强度低，甚至有混料现象 Some hard and super-hard aluminum mechanical properties are close to ordinary steel. Aluminum alloy, corrosion resistance, abrasion resistance and vibration resistance, widely used in automobiles, tractors and forestry machinery. In order to improve the mechanical properties of products, aluminum commonly used quenching and aging process. In large-scale production, due to the protection of large amount of material, often quenching the mechanical properties of the material is low, the whole root or the intensity is low, and even mixed phenomenon