Production Practice of Eliminating Graphite Blooming in Nodular Cast Iron
Author of the article:JIANG Jianzhu;ZHANG Yalong;YANG Bo
Author's Workplace：Foundry Branch,Shaaxi Fast Auto Drive Group Co.,Ltd.,Baoji 722409,China
Key Words：graphite blooming degree of activity graphite floatation inoculation
Abstract：
In view of the problems of graphite blooming and the thickness of edge graphite layer exceeding the standard in the production of ferrite nodular cast iron,the causes of graphite blooming were analyzed.Ductile iron was produced by adjusting inoculation,reducing carbon equivalent,replacing burden and lowering pouring temperature.The results show that graphite blooming is easy to occur in castings with C04 high purity cast iron.By changing the ingredients,using Q10 pig iron instead of C04 high purity pig iron can eliminate the problems of graphite blooming and excessive thickness of graphite layer at the edge of casting.
