低压铸造ZL210A合金铸件流线缺陷研究

周中波; 何益可; 林琳; 李小军; 黄旗

doi:10.15980/j.tzzz.2019.08.004

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低压铸造ZL210A合金铸件流线缺陷研究
Analysis of Streamline Defects in ZL210A Alloy Castings by Counter-gravity Casting
2019年39卷第8期页码：828-831
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.08.004

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[1]周中波,何益可,林琳,李小军,黄旗.低压铸造ZL210A合金铸件流线缺陷研究[J].特种铸造及有色合金,2019,39(08):828-831.

Zhou Zhongbo, He Yike, Lin Lin, et al. Analysis of Streamline Defects in ZL210A Alloy Castings by Counter-gravity Casting[J]. Special Casting & Nonferrous Alloys, 2019,39(8):828-831.
[1]周中波,何益可,林琳,李小军,黄旗.低压铸造ZL210A合金铸件流线缺陷研究[J].特种铸造及有色合金,2019,39(08):828-831. DOI： 10.15980/j.tzzz.2019.08.004.

Zhou Zhongbo, He Yike, Lin Lin, et al. Analysis of Streamline Defects in ZL210A Alloy Castings by Counter-gravity Casting[J]. Special Casting & Nonferrous Alloys, 2019,39(8):828-831. DOI： 10.15980/j.tzzz.2019.08.004.

摘要

通过OM、SEM、EDS、XRD以及室温拉伸试验等措施

对ZL210A合金铸件的流线缺陷进行了研究。结果表明

低压铸造条件下

ZL210A合金铸件流线缺陷会导致缺陷部位抗拉强度、伸长率、硬度有所降低

但其力学性能仍可以满足铸件的使用要求;流线缺陷试样断口主要以细小韧窝和冰糖状形貌为主

无缺陷试样断口全部由细小韧窝组成

流线缺陷试样具有转变为脆性断裂的趋势;在ZL210A合金流线区域

Cu含量低于标准要求

最终导致ZL210A合金力学性能的降低。

Abstract

The streamline defects in ZL210A alloy castings were investigated by OM

XRD

SEM

EDS and room temperature tensile testing.The results show that the streamline defects can lead to the slight decrease of tensile strength

elongation

hardness at ZL210A defect sample position by counter-gravity casting

however the mechanical properties of streamline defect samples still meet the use requirements.Crack morphology of sample with streamline defects is characterized by fine dimple structure and rock candy shape.The sample with defects-free is characterized by fine dimple hole.The streamline defect sample is the precursor of brittle fracture.The Cu element in the streamline defects area in ZL210A alloy is less than the standard values

resulting in the decrease of the mechanical properties of ZL210A alloy.