Numerical Simulation of ZQCr2 Low Chromium White Cast Iron Grinding Ball during Solidification and Processing Optimization

Ding Hengmin; Zhang Yanhua

doi:10.15980/j.tzzz.2016.01.007

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Numerical Simulation of ZQCr2 Low Chromium White Cast Iron Grinding Ball during Solidification and Processing Optimization
Vol. 36, Issue 1, Pages: 23-26(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.01.007

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[1]丁恒敏,张艳华.ZQCr2磨球凝固过程数值模拟及工艺优化[J].特种铸造及有色合金,2016,36(01):23-26.

Ding Hengmin, Zhang Yanhua. Numerical Simulation of ZQCr2 Low Chromium White Cast Iron Grinding Ball during Solidification and Processing Optimization. [J]. Special Casting & Nonferrous Alloys 36(1):23-26(2016)
[1]丁恒敏,张艳华.ZQCr2磨球凝固过程数值模拟及工艺优化[J].特种铸造及有色合金,2016,36(01):23-26. DOI： 10.15980/j.tzzz.2016.01.007.

Ding Hengmin, Zhang Yanhua. Numerical Simulation of ZQCr2 Low Chromium White Cast Iron Grinding Ball during Solidification and Processing Optimization. [J]. Special Casting & Nonferrous Alloys 36(1):23-26(2016) DOI： 10.15980/j.tzzz.2016.01.007.

摘要

针对尺寸为100mm的ZQCr2低铬合金铸铁磨球的铸造工艺

利用华铸CAE软件对磨球的凝固过程进行了流动场和温度场的数值模拟

预测了100mm低铬合金铸铁磨球在铸造中可能产生的缺陷位置

并对磨球内部产生缩孔、缩松的原因进行了分析。通过增加上铁型及砂套

缩短内浇道尺寸等进行了修改和优化

并对浇冒系统优化前、后的铸造方案进行了温度场的数值模拟对比。结果表明

优化后的浇冒系统实现了顺序凝固

缩孔缺陷从磨球内部转移到了冒口内

模拟结果与实际浇注结果相符。

Abstract

The temperature field and flow field in low chromium white cast iron grinding ball in sand mold during solidification process were simulated by the InteCast software.The possible defect position in the100mm grinding ball was forecasted.The origination of shrinkage holes in the grinding ball was analyzed.The gating system was modified to optimize design by adding sand sleeves

shortening ingates and reducing the riser size as well as other methods.The temperature field of the gating system before and after optimization was simulated.The simulated results show that the optimized gating system can realize the sequential solidification

and shrinkage holes are transferred from the ball to the riser.The simulated results are consistent with the actual casting ones.