Streamline Defects in ZL205A Aluminum Alloy Castings

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Streamline Defects in ZL205A Aluminum Alloy Castings
Vol. 30, Issue 11, Pages: 984-987(2010)
Published： 2010 ，
DOI：

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[1]陈邦峰,贾泮江.ZL205A铝合金铸件流线缺陷研究[J].特种铸造及有色合金,2010,30(11):984-987+973.

Streamline Defects in ZL205A Aluminum Alloy Castings. [J]. Special Casting & Nonferrous Alloys 30(11):984-987(2010)
[1]陈邦峰,贾泮江.ZL205A铝合金铸件流线缺陷研究[J].特种铸造及有色合金,2010,30(11):984-987+973. DOI：

Streamline Defects in ZL205A Aluminum Alloy Castings. [J]. Special Casting & Nonferrous Alloys 30(11):984-987(2010) DOI：

摘要

以实际生产过程中ZL205A铸件的流线缺陷为研究对象

采用SEM、EDS、DSC分析手段

研究了流线缺陷对铸件力学性能、组织、成分和熔点的影响。结果表明

流线缺陷对试样力学性能有一定程度的影响

但绝大多数满足I级指标要求;流线缺陷试样断口形貌主要为细小的韧窝孔洞

表现出较好的塑性;流线缺陷合金基体以α-Al固溶体为主

并含有Ti、V、Mn、Cu等合金元素

以及片状灰白物质Al3Ti相;流线缺陷试样吸热峰初始温度、相变峰值温度和合金熔化结束温度均比无缺陷试样吸热峰值高13、5和6℃。

Abstract

Effects of streamline defects in practically produced ZL205A alloy castings on mechanical properties

microstructure

composition and melting point of the alloy were investigated by SEM（scanning electron microscope）

EDS（energy dispersive spectrometer）and DSC.It is found that the streamline defects have a little effect on the mechanical properties of the alloy castings

and the major can meet the requirements of I grade.Crack morphology of samples with streamline defects is characterized by fine dimple hole

exhibiting acceptable toughness.The matrix alloy is mainly composed of Al solid solution

and Ti

Cu element as well as grey-white Al3Ti plate.Compared with those of samples without streamline defects

peak temperature of initial melting

phase and final melting of samples with streamline are increased by 13 ℃

5℃ and 6℃

respectively.