Numerical Simulation and Analysis of Investment Casting Process of a Fe-Cr-Ni Alloy for Sleeve

Zhou Zigang; Yuan Zizhou; Li Yulai; Le Wenkai; Ouyang Minghui

doi:10.15980/j.tzzz.2015.12.016

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Numerical Simulation and Analysis of Investment Casting Process of a Fe-Cr-Ni Alloy for Sleeve
Vol. 35, Issue 12, Pages: 1286-1289(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.12.016

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[1]周子刚,袁子洲,李玉来,乐文凯,欧阳明辉.一种Fe-Cr-Ni合金轴套熔模铸造过程数值模拟与分析[J].特种铸造及有色合金,2015,35(12):1286-1289.

Zhou Zigang, Yuan Zizhou, Li Yulai, et al. Numerical Simulation and Analysis of Investment Casting Process of a Fe-Cr-Ni Alloy for Sleeve. [J]. Special Casting & Nonferrous Alloys 35(12):1286-1289(2015)
[1]周子刚,袁子洲,李玉来,乐文凯,欧阳明辉.一种Fe-Cr-Ni合金轴套熔模铸造过程数值模拟与分析[J].特种铸造及有色合金,2015,35(12):1286-1289. DOI： 10.15980/j.tzzz.2015.12.016.

Zhou Zigang, Yuan Zizhou, Li Yulai, et al. Numerical Simulation and Analysis of Investment Casting Process of a Fe-Cr-Ni Alloy for Sleeve. [J]. Special Casting & Nonferrous Alloys 35(12):1286-1289(2015) DOI： 10.15980/j.tzzz.2015.12.016.

摘要

应用ProCAST软件对Fe-Cr-Ni合金轴套的熔模铸造过程进行了数值模拟与分析

主要包括充型过程

凝固时间、缩孔、缩松的形成过程和应力场。模拟结果预测了轴套中存在的热裂缺陷

与实际生产情况基本符合。分析结果表明

轴套铸件产生热裂纹的主要原因是在凝固过程中冒口圈与铸件之间产生了缩松、缩孔

该缺陷的产生使得此部位的强度降低

合金收缩时该部位的拉应力大于其强度极限

因此容易产生裂纹。采取扩大横浇道截面的方法

使得铸件有足够的补缩量

通过生产得到了合格的铸件。

Abstract

The investment casting process including filling process

solidification time

shrinkage porosity formation and stress field

of a Fe-Cr-Ni alloy sleeve was simulated and analyzed by ProCAST software.The hot tearing defect was predicted

and the simulated results were well in agreement with the practical product.The analysis results reveal that the hot tearing of the sleeve is attributed to the shrinkage porosity occurred between the riser ring and the casting during solidification process resulting in the decrease of strength.When the tensile stress is more than the ultimate strength

hot tearing is generated.Through expending the section of the runner cross-gate to take enough feeding for the castings

the qualified castings were produced successfully.