摘要
介绍了风电轴承座的铸件结构及技术要求,利用数值模拟软件MAGMA对2种铸造工艺设计方案的充型过程进行对比分析。利用MAGMA模拟软件对充型相对平稳的方案进行凝固过程模拟分析,结果发现铸件局部区域有产生缩孔、缩松的倾向。最后通过在该处加设冒口和冷铁,使缩孔、缩松问题得以解决。将最后确定的工艺方案用于实际生产,结果显示,经超声波检测,铸件内部致密,不存在缩孔缺陷,轴承座检测区域、金相组织及力学性能完全能满足客户要求。
Configuration and technical requirements of bearing pedestal casting used for wind power were introduced. By using numerical simulation software MAGMA,mold filling process of two casting method design schemes was simulated,compared and analyzed. The solidification process of the casting method showing relatively smooth mold filling process was simulated and analyzed by using MAGMA software,the result indicated that there was shrinkage cavity and porosity-occurring tendency in a local area. This defect problem was finally solved by setting riser and denseners at defect area. The decided casting method has been put into practical production and result of the ultrasonic defect detection showed that the internal structure of the casting was dense with no shrinkage defect,the quality of detection area,the microstructure and mechanical properties fully met client's requirements.
出处
《现代铸铁》
CAS
2015年第1期75-80,共6页
Modern Cast Iron
