立式离心场下钛合金铸件缩孔缩松数值模拟

历长云; 崔红保; 吴士平; 郭景杰; 王狂飞; 米国发; 王惠玲

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立式离心场下钛合金铸件缩孔缩松数值模拟
Modeling of Shrinkage Porosity （Hole） in Ti Alloy Castings in Vertical Centrifugal Field
2008年第10期页码：759-761
纸质出版日期： 2008 ，
DOI：

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[1]历长云,崔红保,吴士平,郭景杰,王狂飞,米国发,王惠玲.立式离心场下钛合金铸件缩孔缩松数值模拟[J].特种铸造及有色合金,2008(10):759-761+734.

Li Changyun1, Cui Hongbao1, Wu Shiping2, et al. Modeling of Shrinkage Porosity （Hole） in Ti Alloy Castings in Vertical Centrifugal Field[J]. Special Casting & Nonferrous Alloys, 2008,(10):759-761.
[1]历长云,崔红保,吴士平,郭景杰,王狂飞,米国发,王惠玲.立式离心场下钛合金铸件缩孔缩松数值模拟[J].特种铸造及有色合金,2008(10):759-761+734. DOI：

Li Changyun1, Cui Hongbao1, Wu Shiping2, et al. Modeling of Shrinkage Porosity （Hole） in Ti Alloy Castings in Vertical Centrifugal Field[J]. Special Casting & Nonferrous Alloys, 2008,(10):759-761. DOI：

摘要

立式离心场下

合金熔体的临界补缩固相率随铸型转速及旋转半径的变化而变化

研究结果显示

随着铸型转速以及旋转半径的增加

临界补缩固相率逐渐增大。通过试算法建立了立式离心场下动态临界补缩固相率。同时通过数值模拟方式

研究了铸型转速、旋转半径、熔体过热度以及铸型型温对钛合金铸件缩孔、缩松的影响。结果显示

随着铸型转速和旋转半径的增加以及熔体过热度及铸型温度的升高

铸件的缩孔、缩松逐渐减少。

Abstract

Critical solid fraction of （CSF） Ti alloy melt is controlled by rotating velocity of the mould and rotating radius in vertical centrifugal field. The results indicate that critical solid fraction is gradually increased with increasing in rotating velocity of mould and rotating radius. Dynamic critical solid fraction in centrifugal field was established through a trial-calculation method. Meanwhile

effects of rotating velocity

rotating radius

melt super-heating degree and temperature of mould on shrinkage hole （porosity） were predicted by the numerical simulation method. The results reveal that with increasing in rotating velocity and rotating radius as well as melt super-heating degree and mould temperature

the shrinkage porosity（hole） is reduced.