【无定形石墨砂特性及其在铸造中的应用研究】潘应君.pdf
ADissertationsubmittedtoEvaluationCommitteeofHUST fortheDegreeofDoctorofPh.DinEngineering Studyon theCharacteristicsandApplications of Crypto-crystallineGraphiteSand inCasting DoctoralCandidate:Pan Yingjun Speciality:Foundry Adviser:Prof.LinHantong Ass.Adviser:Ass.Porf.
缩松缺陷而导致的废品率,有效地提高了生产率和经济效益.在温度场测试的基础上,对比研究了冷铁和石墨砂激冷块对铸铁组织的影 响,并结合球铁曲轴进行了生产试验。利用球铁三维凝固模拟软件,模拟了球铁 曲轴在冷铁、石墨砂、无激冷块三种工艺条件下的凝固过程,并在现场进行曲轴 和铸型的温度场测试,试验分析及组织观察的结果表明,石墨砂可以有效地消 除曲轴的缩松缺陷,达到与冷铁相同的效果。这一结论为石墨砂的广泛应用开 辟了新领域。
process andmicrostructure of cast ironwere studied andthe different chilling mechanism of cast iron chill and the graphite sandchillingpiece were inquired comparatively.At the same time,thesolidificationprocess of ductileiron crankshaft under 3different technologicalconditionsusingcastiron chill,the