铝及其合金具有重量轻、耐腐蚀、易加工、无低温脆性、反射能力强等优良性能而受到人们的青睐,特别在交通运输、国防、航空、建筑材料、容器、包装材料等方面有突出的节能效果、故铝的应用领域越来越广,用量越来越大。在铝材加工行业中,挤压型材又以它优异的特性,成为现代建筑和厨窗装璜方面的重要材料。近年来,随着我国经济建设的发 Aluminum and its alloys are favored by people for their excellent properties such as light weight, corrosion resistance, easy processing, no low temperature brittleness and strong reflection ability, and are especially outstanding in transportation, defense, aviation, construction materials, containers and packaging materials Of the energy-saving effect, so the application of aluminum is more and more widely used more and more. In the aluminum processing industry, extruded profiles with its excellent features, as modern building and kitchen window decoration important material. In recent years, with the economic development of our country