Effects of Super-heat Treatment on the Solidification Microstructure and Subtle Structure in ZL114A Alloy

Chen Liang; Zhang Rong; Zhang Limin; Yang Zhihuai; Cui Wenfeng

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Effects of Super-heat Treatment on the Solidification Microstructure and Subtle Structure in ZL114A Alloy
Vol. 29, Issue 7, Pages: 669-671(2009)
Published： 2009 ，
DOI：

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[1]陈亮,张蓉,张利民,杨志怀,崔文峰.熔体超熔点高温处理对ZL114A凝固组织的影响[J].特种铸造及有色合金,2009,29(07):669-671+587.

Chen Liang, Zhang Rong, Zhang Limin, et al. Effects of Super-heat Treatment on the Solidification Microstructure and Subtle Structure in ZL114A Alloy. [J]. Special Casting & Nonferrous Alloys 29(7):669-671(2009)
[1]陈亮,张蓉,张利民,杨志怀,崔文峰.熔体超熔点高温处理对ZL114A凝固组织的影响[J].特种铸造及有色合金,2009,29(07):669-671+587. DOI：

Chen Liang, Zhang Rong, Zhang Limin, et al. Effects of Super-heat Treatment on the Solidification Microstructure and Subtle Structure in ZL114A Alloy. [J]. Special Casting & Nonferrous Alloys 29(7):669-671(2009) DOI：

摘要

以ZL114A合金为研究对象

研究不同超熔点高温温度对其凝固组织和精细结构的影响。结果表明

经过925℃超温处理后

α-Al相枝晶明显细化

并且随着超温温度的升高

晶格常数随之增大

α-Al基体的位错密度和显微硬度得到提高

共晶硅相的尺寸逐渐减小

其形貌由针片状逐渐向球状转化。

Abstract

Effects of varied super-heated temperatures on the solidification microstructure and subtle structure in ZL114A alloy have been observed by OM （optical microscope） and SEM （scanning electron microscope） and XRD （X-ray diffraction）. The results reveal that α-phase dendrite in the alloy can be greatly refined with super-heated treatment at 925℃. Furthermore

with increasing in temperatures

the lattice constant is increased and dislocation density and micro-hardness of the α-matrix are improved

meanwhile

the morphology of the α-phase is converted from acicular structure into spherical structure with decreasing in size of eutectic phase.