摘要
针对壳型工艺生产EA211发动机主轴承盖存在的内部缩孔、缩松缺陷,通过调整化学成分、降低铁液温度和铁丸冷却温度、改进浇注系统和冒口形式等措施,采用计算机模拟和生产试验相结合的方式进行了大量的工艺改进和攻关试验,最终通过将原来的一型6组铸件改为一型4组铸件、铁液从冒口中进入的工艺方案,解决了EA211发动机球墨铸铁主轴承盖缩孔、缩松质量问题,使缩孔、缩松废品率由原来的26.3%降到2.3%,取得了较好的质量攻关效果。
In order to solve the defects problem of shrinkage cavities and porosities existing in the main bearing cover casting of EA211 engine produced with shell mold easting process,by adopting measures including adjusting chemical composition, decreasing temperature of iron meh and cooling temperature of iron pills,improving gating system and riser type et al,and by combining computer simulation and productive experiments,a great lot method improving experiments were earried out. Finally by adopting the casting method that changed original 6 groups castings per mob] into 4 groups castings per mold,and the iron meh entered through the riser into casting cavity,the shrinkage cavities and porosities problem of the nodular iron bearing cover casting of EA211 engine was solved that reduced the rejecteing rate due to shrinkage cavtities and porosities from original 26.3% to 2.3%,obtaining quite good result of quality problem solution experiments.
出处
《现代铸铁》
CAS
2017年第3期58-61,共4页
Modern Cast Iron
关键词
球墨铸铁
主轴承盖
缩孔
缩松
工艺改进
nodular iron
main hearing cover
shrinkage caity
shrinkage porosity
method improvement
