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消除球墨铸铁开花状石墨的生产实践
Production Practice of Eliminating Graphite Blooming in Nodular Cast Iron
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- DOI:
- 作者:
- 姜建柱 张亚龙 杨波
JIANG Jianzhu;ZHANG Yalong;YANG Bo
- 作者单位:
- 陕西法士特汽车传动集团有限责任公司铸造分公司
Foundry Branch,Shaaxi Fast Auto Drive Group Co.,Ltd.,Baoji 722409,China
- 关键词:
- 石墨开花 活度 石墨漂浮 孕育处理
graphite blooming degree of activity graphite floatation inoculation
- 摘要:
- 针对铁素体球墨铸铁生产中所出现的石墨开花及边沿石墨层厚度超标问题,分析了石墨开花产生的原因。通过调整孕育,降低碳当量,更换炉料,降低浇注温度等试验,生产了球墨铸铁。结果表明,长期使用C04高纯生铁配料,铸件容易出现石墨开花现象。通过改变配料,采用Q10生铁代替C04高纯生铁,可以消除石墨开花及铸件边沿石墨层厚度超标问题。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.