高温合金薄壁件铸造工艺优化设计

Design and Optimization of Casting System of a Superalloy Thin-Walled

高温合金缘板铸件曲面形状复杂,壁厚不均匀,易产生缩孔、显微疏松、气孔等铸造缺陷。本文针对高温合金缘板铸件在研制时遇到的主要问题,采用华铸CAE铸造分析软件对顶注和侧注两种工艺进行模拟,发现采用侧注充型工艺可有效防止铸件的显微疏松、气孔、冷隔、浇不足等缺陷。并对模拟优化后的工艺进行了验证,结果表明,采用侧注充型方案实现了缘板薄壁结构件的充型完整性和内部无超标冶金缺陷。

The curved surface shape of platform castings is complex,and the wall thickness is uneven,which is prone to casting defects such as shrinkage,micro-porosity,and porosity.This paper mainly focuses on the main problems encountered in the development of superalloy platform castings.Intecast CAE is used to simulate the top gating and the side gating system processes of platform castings.The results show that the side injection process effectively control defects such as micro-porosity,porosity,cold lap,and misrun in the castings.Experimental verification was conducted on the side injection scheme.The results show that the filling integrity of thin-walled structural platform castings has been achieved and there are no internal defects exceeding the standard by adopting a side gating system scheme.