孕育方法对铸铁孕育效果影响研究
毕业论文关键词：孕育剂；孕育工艺；灰铸铁；石墨组织
Study the effects of inoculation method
on cast iron inoculation
Abstract: This paper used the ferrosilicon inoculant for gray cast iron inoculation, The effects of inoculant amount, inoculant particle size, different inoculation of process on graphite morphology and microstructure, compressive strength have been investigated. The experimental results showed that: after inoculation of gray cast iron, the graphite, graphite type level increased significantly, the inoculation effect good gray cast iron graphite structure more uniform, more fine. Inoculant addition amount is 0.1%, inoculant particle size is 0.3-0.06mm sample inoculation effect best, the maximum compressive strength, 810MPa, graphite morphology in A type, length of the graphite grade 5 level, and the distribution was more uniform. The experimental conditions of induction furnace temperature was difficult to control, the use of high temperature radiation thermometer for temperature measurement, so not good control of pouring temperature, may affected the results.
Keywords: Inoculant; Inoculation process; Gray cast iron; Graphite organization
目 录
1. 前言 1
1.1 铸铁概述 1
1.2孕育机理 1
1.3孕育剂 2
1.3.1 75SiFe 2
1.3.2 含Sr 孕育剂 2
1.3.3 含Ba 孕育剂 2
1.3.4 稀土复合孕育剂 2
1.4孕育剂的贮存与干燥 3
1.5孕育方法 3
1.5.1 包内孕育 3
1.5.2 瞬时孕育 3
1.6孕育效果 6
1.7课题研究的目的和意义 7
1.8课题的研究内容和目标 7
1.8.1课题的研究内容 7
1.8.2课题的研究目标 7
2.实验 8
2.1实验用原材料 8
2.2实验设备 8
2.2.1干燥箱 8
2.2.2 SHN辗轮式混砂机 8
2.2.3ZG-10真空中频感应熔炼炉 9
2.2.4 2000KN液压万能试验机 9
2.2.5 金相显微镜 10
2.3实验方案 11
2.3.1包内孕育对铸铁石墨组织的影响 11
2.3.2采用型内孕育的铸铁石墨组织 11
2.3.3 不同粒度与加入量对铸铁抗压强度的影响 12
2.4实验过程 13
2.4.1模具 13
2.4.2混砂工艺 13
2.4.3造型 13
2.4.4制作炉衬 14
2.4.5浇铸与孕育 14
2.4.6铸铁石墨组织的金相观察 15
2.4.7抗压强度测试 16
3. 实验结果及讨论分析 17
3.1包内孕育的灰铸铁的金相组织的观察研究 17
3.2 型内孕育灰铸铁孕育剂加入量与粒度对金相组织的影响 18