球墨铸铁具有多种独特的综合机械性能和优越的工艺性,制造周期短,成本低,在国内外都得到广泛应用,如在汽车、造船、机车、化工机械、农机等领域。目前在我国钢产量不高,废钢少的情况下,以球墨铸铁代替钢材尤其重要。不同牌号的球铁对不同承载性质的机件有着广泛的适应性,不同负载性质的机件应选用不同牌号的球铁,才能发挥其材质的性能和使用水平。不同机件的负荷都有以其种性能为主 Nodular cast iron with a variety of unique comprehensive mechanical properties and superior technology, short manufacturing cycle, low cost, are widely used at home and abroad, such as cars, shipbuilding, locomotives, chemical machinery, agricultural machinery and other fields. At present, China’s steel production is not high, the case of scrap less, to ductile iron instead of steel is particularly important. Ductile iron of different grades has a wide range of adaptability to different load-bearing parts. Different types of ductile iron with different grades should be used in order to exert the performance and use level of the materials. Different parts have their load-based performance