控制铁液共晶度和再辉度提高球墨铸铁球化等级  

Improving Ductile-iron Nodulizing Grade by Controlling the Degree of Eutectic and Reradiance of Iron Liquid

作　　者：吕猛 王玉国 LU Meng;WANG Yu-guo(TaiYuan Heavy Machinery Group Yuci Hydraulic Industry Co.,Ltd.,Yuci Shanxi 030600,China)

机构地区：[1]太重集团榆次液压工业有限公司,山西榆次030600

出　　处：《铸造设备与工艺》2023年第2期45-48,共4页Foundry Equipment & Technology

摘　　要：共晶度决定铁水的流动性,决定球铁的石墨形态、球墨分布和缩孔率。再辉度决定球铁的球化率和缩松率。控制住铁水的共晶度和再辉度,就能获得满意的组织性能。本文研究采用不同的孕育处理工艺,来控制铁液共晶度与再辉度,提高球墨铸铁球化等级,生产高质量的球墨铸铁件。Eutectic degree determines the fluidity o£molten iron,graphite morphology,spheroidal ink distribution and shrinkage porosity of ductile iron.The reradiance degree determines the spheroidization rate and shrinkage rate of nodular iron.Satisfactory microstructure properties can be obtained by controlling the eutectic degree and rebrightness of molten iron.In this paper,in order to improve the spheroidization grade of nodular cast iron and produce high quality nodular cast iron,different inoculation processes were used to control the eutectic degree and rebrightness of liquid iron.

关 键 词：孕育处理 共晶度 再辉度 球化等级 

分 类 号：TG255[金属学及工艺—铸造]