【摘要】 生产条件不同,球铁铸件性能的差异很大。分析球铁生产中S与Mg、RE的关系,以及这3个元素含量对球铁质量的影响。针对厚壁铸件中经常出现的碎块状石墨提出了相应的改进措施:适当增加碳,降低硅,提高残余Mg量,降低残余RE量,采用冷铁提高冷却速度。更多还原

【Abstract】 Different production conditions could cause big difference in properties of ductile irons. The relationship between S, Mg and RE in ductile iron production, as well as influences of these 3 elements on the quality of ductile irons were analyzed. Some measures to prevent chunk graphite formation in heavy ductile iron were proposed as follows: properly increasing C content, decreasing Si content; enhancing residual Mg content; decreasing residual RE content; using chills to increase cooling rate.更多还原