热浸渗铝钢是一种复合材料。其基材一般为普通碳钢或低合金钢,表面为冶金结合的纯铝及铝铁合金层。它具有良好的抗腐性、耐高温氧化、防磨损、抗渗碳及对光、热的反射等性能。与不锈钢、耐热钢相比,生产成本低,强度和硬度高于纯铝材,加之生产工艺较简单,周期短,适于大批量生产。在工业发达国家已广泛用于石油、化工、冶金、机械、轻工、交通运输、建筑、电力、通讯、太阳能及海洋工程等部门。五十年代中期,美国、日本的热浸渗铝钢已进入工业性生产。1962年英国建成第一条年产3万吨热镀铝生产线,1968年第二条年产3万吨渗铝钢的自动线又投入生产。到七十年代,美国年产热浸渗铝钢25 Hot-dipped aluminum is a composite material. The substrate is generally ordinary carbon steel or low alloy steel, the surface of pure aluminum and aluminum alloy with metallurgical alloy layer. It has good corrosion resistance, high temperature oxidation, anti-wear, anti-carburizing and light, heat reflection and other properties. Compared with stainless steel, heat-resistant steel, low production costs, strength and hardness higher than pure aluminum, combined with the production process is relatively simple, short cycle, suitable for mass production. In industrialized countries, it has been widely used in petroleum, chemical, metallurgy, machinery, light industry, transportation, construction, power, telecommunications, solar and marine engineering departments. The mid-fifties, the United States, Japan’s hot-dip aluminized steel has entered industrial production. 1962 Britain built the first annual output of 30,000 tons of hot-dip aluminum production line in 1968, the second with an annual output of 30000 tons of aluminized steel automatic line put into production. By the 1970s, the United States had an annual output of hot-dip aluminized steel 25