Analysis of Investment Casting Defects

Pan Yuhong; Zhu Weijie

doi:10.15980/j.tzzz.2017.04.015

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Analysis of Investment Casting Defects
Vol. 37, Issue 4, Pages: 398-400(2017)
Published： 2017 ，
DOI： 10.15980/j.tzzz.2017.04.015

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[1]潘玉洪,朱伟杰.熔模铸件缺陷分析[J].特种铸造及有色合金,2017,37(04):398-400.

Pan Yuhong, Zhu Weijie. Analysis of Investment Casting Defects. [J]. Special Casting & Nonferrous Alloys 37(4):398-400(2017)
[1]潘玉洪,朱伟杰.熔模铸件缺陷分析[J].特种铸造及有色合金,2017,37(04):398-400. DOI： 10.15980/j.tzzz.2017.04.015.

Pan Yuhong, Zhu Weijie. Analysis of Investment Casting Defects. [J]. Special Casting & Nonferrous Alloys 37(4):398-400(2017) DOI： 10.15980/j.tzzz.2017.04.015.

摘要

论述了熔模铸件缺陷分析的方法

对难以鉴别的熔模铸件缺陷

可借助金相分析法、化学法、酸浸法、低倍显微镜观察法、无损探伤等手段鉴别缺陷类型

继而采取有效措施。着重分析了熔模铸件的热裂纹缺陷

通过提高浇注温度、增加型壳退让性、减少铸造应力

以及改变铸件结构和铸件凝固顺序

可消除铸件热裂纹

降低废品率。

Abstract

The analysis methods and program of investment casting defects were described briefly.Defects difficult to identification can use microstructure analysis

chemical analysis

acidic immersion

OM and XRD.Hot crack in investment castings was analyzed.Through increasing pouring temperature and shell-mold deformability to decrease stress

and modifying casting structure to realize sequential solidification

hot crack is eliminated and waste rate is decreased.