摘要
地铁用定位转臂其关键部位的内部质量要求达到ASTME446Ⅱ级,内部质量要求较高。在铸造工艺设计过程中,采用MAGMA模拟软件分析了流场、温度场以及凝固过程,并进一步优化了铸造工艺。采用酯硬化水玻璃石英砂造型,中频感应电炉复合脱氧熔炼铁液浇注铸件。实际生产应用表明:优化后的铸造工艺具有较好的补缩效果,可以有效确保定位转臂的内部及外部质量;铸件表面粗糙度可达到Ra=50μm,Ⅱ、Ⅳ型非金属夹杂物控制在1级范围以内,达到产品的技术要求。
The positioning rotary arms for the metro have extremely high demands for internal quality, especially in the key locations, NDT must meet the requirements of ASTM E446 Ⅱ. In the casting process design, the flow field, temperature field and solidification process of casting were simulated and analyzed by MAGMA software, and then the casting process was optimized. The castings were produced by the ester hardening sodium silicate quartz sand molding process and the medium frequency induction furnace combined deoxidization melting process. The application in actual production shows that the optimized casting process has a good feeding effect that can effectively ensure the internal quality of the positioning arm. The surface roughness of castings can reach Ra50, and the type II and IV non-metallic inclusions of castings can be controlled within the first level range. All the testing results meet the technical requirements of the products.
作者
李伟
杜天彬
曹健峰
曹松
姜伟航
吕昌略
LI Wei;DU Tian-bin;CAO Jian-feng;CAO Song;JIANG Wei-hang;LV Chang-lue(CRRC Qishuyan Institute Co.,Ltd.,Changzhou213011,Jiangsu,China)
出处
《铸造》
CAS
北大核心
2019年第6期640-643,共4页
Foundry
关键词
定位转臂
模拟分析
铸造工艺
positioning arm
simulation analysis
casting process