75硅铁型内孕育和非型内孕育的比较研究
毕业论文关键词：孕育剂；型内孕育；铸铁；石墨组织
Study on the Inoculation In mould and Non-in mould within inoculation
Abstract
Silicon as inoculation was used in this experiments.The effects of inoculation method，pouring temperature，quantity of inoculation on inoculation of cast iron have been studied.The results showed that:After inoculating gray cast iron，graphite-type graphite grades improved significantly，the inoculation effect good gray iron graphite structure which is more uniform and more detailed.Inoculation on the particle size and the certain circumstances, for the amount of inoculation castings compressive strength decreases with the increase of pouring temperature, The pouring temperature of 1370-1450℃was more appropriate to the cast iron Inoculation on the particle size and the certain circumstances, for the amount of inoculation castings compressive strength decreases with the increase of pouring temperature, The best amount of inoculation was 0.1-0.15%.In pouring temperature and the inoculation addition amount of a certain situation, the compressive strength of castings as nucleating agent increases with increasing of the particle size, Inoculation particle size of 0.3-0.06mm gestation best.
Keywords:Inoculation;In mould Inoculation;Gray cast iron;Graphite organization
目录
1前言 1
1.1铸铁 1
1.2铸铁孕育机理 2
1.3铸铁孕育工艺方法 2
1.3.1包内孕育 2
1.3.2瞬时孕育 4
1.4型内孕育 4
1.4.1工艺因素对型内孕育的影响 4
1.5研究目的及意义 7
1.6课题的研究内容和目标 7
1.6.1研究内容 7
1.6.2研究目标 7
2实验 8
2.1实验原材料 8
2.2实验设备 8
2.3实验方案 9
2.3.1采用型内孕育方法孕育的铸铁 9
2.4实验过程 11
2.4.1型内孕育实验过程 11
3实验结果与分析讨论 13
3.1灰铸铁中存在的石墨形态 13
3.2型内孕育的灰铸铁金相组织及抗压强度分析 15
3.2.1孕育剂加入量对型内孕育效果的影响 15
3.2.2浇注温度对型内孕育效果的影响 21
3.2.3孕育剂粒度对型内孕育效果的影响 24
4结论 29
致谢 30
参考文献 31