MgO对球墨铸铁件皮下气孔形成的影响分析  

Analysis of Influence of MgO on Forming Surface Blowhole in Ductile Cast Iron

作　　者：孙少东[1] 何时剑[1] 张孟群[2] 刘笛[2] 

机构地区：[1]淮安信息技术学院机电工程系,江苏淮安223001 [2]南京大学现代分析中心,江苏南京210018

出　　处：《铸造》2004年第12期1031-1034,共4页Foundry

摘　　要：通过对以往所做皮下气孔试验的分析总结,认为MgO的存在是产生该缺陷的关键因素;设计了新的试验方案、给出了试验结果;在对相关现象进行了理论分析的基础上,提出了MgO促进皮下气孔形成的机理,同时讨论了生产实践中常见的解决方案。After summarizing some tests having been done by others,it is found that MgO plays an important role in forming surface blowhole in ductile cast iron.Based on these,a new test method has been proposed and the result has also been given.On the base of theoretical analysis on relevant facts,the mechanism that MgO promotes the forming of surface blowholes has been proposed.Some usual preventive methods in production practice were also discussed in detail.

关 键 词：球墨铸铁 皮下气孔 MGO 氧化膜 

分 类 号：TG250.6[金属学及工艺—铸造]