Prediction of Shrinkage Porosity （Hole） in TiAl Based Alloy Blade and Its Processing Optimization Based on the ProCAST

Pan Liwen1; Gao Yong1; Gao Wenli3; Hu Zhiliu2; Zheng Lijing1; Zhang Hu1

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Prediction of Shrinkage Porosity （Hole） in TiAl Based Alloy Blade and Its Processing Optimization Based on the ProCAST
Vol. 30, Issue 6, Pages: 504-507(2010)
Published： 2010 ，
DOI：

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[1]潘利文,高永,高文理,胡治流,郑立静,张虎.基于ProCAST的TiAl叶片缩孔缩松预测及工艺优化[J].特种铸造及有色合金,2010,30(06):504-507+592.

Pan Liwen1, Gao Yong1, Gao Wenli3, et al. Prediction of Shrinkage Porosity （Hole） in TiAl Based Alloy Blade and Its Processing Optimization Based on the ProCAST. [J]. Special Casting & Nonferrous Alloys 30(6):504-507(2010)
[1]潘利文,高永,高文理,胡治流,郑立静,张虎.基于ProCAST的TiAl叶片缩孔缩松预测及工艺优化[J].特种铸造及有色合金,2010,30(06):504-507+592. DOI：

Pan Liwen1, Gao Yong1, Gao Wenli3, et al. Prediction of Shrinkage Porosity （Hole） in TiAl Based Alloy Blade and Its Processing Optimization Based on the ProCAST. [J]. Special Casting & Nonferrous Alloys 30(6):504-507(2010) DOI：

摘要

应用铸造模拟软件ProCAST预测了精密铸造Ti-47Al-2Cr-2Nb合金叶片缩孔、缩松的形成情况

并与试验结果进行对照

吻合良好

表明ProCAST软件对缩孔、缩松的预测准确可靠。鉴于单独靠冒口的补缩作用无法全部消除叶片的缩孔缩松

因此通过模拟方法比较了底部铜板+型壳预热法、型壳纵向外加温度梯度法及型壳整体预热法对TiAl叶片缩孔缩松的消除效果。结果表明

最佳的工艺是模壳整体预热法

当型壳预热温度达到1000℃时

能够完全消除叶片的宏观缩孔缩松缺陷。

Abstract

Shrinkage porosity （hole ）in the investment casting Ti-47Al-2Cr-2Nb alloy blade was predicted by the ProCAST software. The simulated results were well in agreement with experimental ones

showing the reliability and precision of the software. Shrinkage porosity （hole） defects in the blade could not totally be eliminated by only feeding effect of riser. Effects of some ways

such as bottom copper plate and mold shell preheating

mold longitudinal gradient temperature and whole mold shell preheating

on elimination of shrinkage porosity （hole） in the blade were simulated comparatively. The results show that the whole mold shell preheating method is an ideal selection for totally eliminating shrinkage porosity （hole） in the blade with preheating up to 1000℃.