风电机组球墨铸铁件缩松缺陷分析与改进方法  

Analysis and Improvement of Shrinkage Defect in Wind Turbine Castings of Spheroidal Graphite Iron

作　　者：胡鹏[1] 杨兆忠[1] 周贝[1] 陈文权[1] 谭斌[1] 

机构地区：[1]株洲电力机车研究所有限公司,湖南株洲412001

出　　处：《铸造技术》2016年第3期585-587,共3页Foundry Technology

摘　　要：针对风电机组主机架在两种不同铸造工艺方案下不同位置出现的缩松进行分析,结果表明,其缩松原因主要为三壁交叉和厚大断面处容易形成铸造热节,导致最后凝固时形成缩松缺陷。通过主机架结构优化和工艺方案调整的方法可降低缩松率。Aimed at main frame castings in wind turbine produced by two different processes, the cause of the shrinkage defect in different location was analyzed. The results show that the main cause of forming defect is that there are casting hot spots in three wall cross and thick section, resulting in inner shrinkage porosity defect in final solidification psocess.Through the optimization of the mainframe structure and the casting process, the shrinkage rate is greatly reduced.

关 键 词：风电机组 主机架 球墨铸铁 缩松 

分 类 号：TG255[金属学及工艺—铸造]