球墨铸铁曲轴铸造缺陷分析  

Analysis of Casting Defects of Nodular Cast Iron Crankshaft

作　　者：马冬威 张元好 赵齐 董森森 MA Dongwei;ZHANG Yuanhao;ZHAO Qi;DONG Sensen(College of Materials and Engineering,Hubei University of Automotive Technology,Shiyan 442002,China)

机构地区：[1]湖北汽车工业学院材料科学与工程学院,湖北十堰442002

出　　处：《热加工工艺》2020年第7期160-162,共3页Hot Working Technology

基　　金：湖北汽车工业学院大学生创新训练计划资助项目(SJ201744);湖北省自然科学基金资助项目(2018CFB77)。

摘　　要：通过宏观分析、金相分析,扫描电镜、能谱分析,XRD分析对某型球墨铸铁曲轴油孔部位铸造缺陷进行了分析。结果表明:型芯原砂中含有Al元素的砂粒在浇注过程中与铁水发生反应,造成型芯耐火度不足,进而导致型芯局部软化、坍砂,形成铸造缺陷。The casting defects in oil hole of a nodular cast iron crankshaft were analyzed by means of macroscopic analysis, metallographic analysis, scanning electron microscopy, energy spectrum analysis and XRD analysis. The results show that the raw sand particles containing Al element in the core sand react with molten iron in the pouring process, resulting in the insufficient refractory degree of the core. It leads to the local softening of the core and the collapse of sand, and forms casting defects.

关 键 词：球墨铸铁 曲轴 铸造缺陷 芯砂 

分 类 号：TG245[金属学及工艺—铸造]