铁基多孔材料除用粉末冶金法生产外,也可用铸造法来制造,而且后者还具有:无需压制设备、零件尺寸和形状不受限制、成本较低等优点。五十年代出现了生长铸铁。此种铸铁系利用铸铁“生长”的原理,藉十余次反复加热、冷却,在石墨四周形成孔隙而制得的。这种铸铁的主要用途是制作含油轴承,特别是用粉末冶金法难以制造的大型含油轴承,可使用于纺织机械、冶金机械、机床、车辆等工业部门。这种材料的缺点是热处理周期甚长。近年来又出现了另一种新的多孔铸铁-脱石墨铸铁。这种材料是将特殊成分的过共晶灰铸铁于氧化性气氛中进行加热处 In addition to iron-based porous materials produced by powder metallurgy, but also can be used to create casting method, and the latter also has: no need to suppress the equipment, parts size and shape is not limited, the advantages of low cost. Fifties grew cast iron. This cast iron system uses the principle of “growth” of cast iron by repeatedly heating and cooling more than ten times to form pores around the graphite. The main purpose of this cast iron is to make oil-impregnated bearings, especially large oil-lubricated bearings that are difficult to manufacture by powder metallurgy and can be used in textile, metallurgy, machine tools, vehicles and other industrial sectors. The disadvantage of this material is the long heat treatment cycle. In recent years, another new type of porous cast iron - graphite off iron. This material is the special composition of the hypereutectic gray cast iron in an oxidizing atmosphere for heating