论文部分内容阅读
1.非合金球铁慢速凝固时碎块状石墨的形成及防止《Fonderie Fondeur Aujourd’hui》〔法〕,1985,Vol.46,P14～23在实验室以模拟厚铸件的凝固(凝固时间约为90分钟)做了约40个试验。结果表明,在原铁水纯净时,附加过量的 FeSiMg 和含碱土金属的孕育剂或附加稀土元素(如0.02%),会产生碎块状石墨。加入微量锑(如0.02%)有助于消除这种缺陷。最后,阐述了防止这种缺陷的各种方法。参202.含 Al3.5%的球墨铸铁的金相《Fonderie
1. Formation and Preventing of Fibrous Graphite during Slow Solidification of Non-alloyed Ductile Iron Fonderie Fondeur Aujourd’hui [Act], 1985, Vol.46, P14-23 Simulate the Solidification of Thick Castings in the Laboratory (Setting Time About 90 minutes) made about 40 experiments. The results show that when the original molten iron is pure, additional excess of FeSiMg and alkaline earth containing inoculant or additional rare earth elements (eg, 0.02%) will produce crumb-like graphite. Addition of trace amounts of antimony (eg 0.02%) helps to eliminate this defect. Finally, the various ways to prevent such defects are described. Senate 202. Al3.5% containing ductile iron metallograph "Fonderie