熔铸工艺对2618铝合金中难溶相尺寸与分布的影响

doi:10.11896/cldb.19090047

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Abstract In order to refine the undissolved phases in aluminum alloy 2618 and improve their distribution state, the effect of melt holding time and double liquid mixing process as well as mold temperature on the size and distribution of insoluble phases was investigated by means of optical microscope, scanning electron microscope and X-ray diffractometer. The results show that the proper increase of holding time not only changes the morphology of Al₉FeNi from coarse needle to fine needle, but also increases the uniformity of Al₉FeNi phase and Al₇Cu₂Fe phase. The double liquid mixing process could make the morphology of Al₉FeNi phase in alloy 2618 changed into fine needle-like. Besides, Al₉FeNi and Al₇Cu₂Fe phases are distributed very uniformly in the matrix of alloy 2618. After the melt of aluminum alloy 2618 is poured into metal mold at room temperature, the fine and uniform distribution of insoluble phases in alloy 2618 could be obtained due to rapid solidification. As the increase of the mold temperature, the size of the insoluble phases in the alloy increases and the aggregation occurs.

Key words： aluminum alloy 2618 insoluble phase melting process mold temperature

Published: 23 February 2021

CLC number:

TG292

Fund:This work was financially supported by the National Natural Science Foundation of China (51074030).

Corresponding Authors: wangjh@cczu.edu.cn

About author:: Zhenyu Zhu is currently pursuing his master degree at School of Materials Science and Engineering of Changzhou University. His research mainly focuses on high-performance non-ferrous metal materials.
Jianhua Wang received his Ph. D. degree at School of Materials Science and Engineering of Central South University. He is a professor and doctoral supervisor of the School of Materials Science and Engineering at Changzhou University. His main research fields are alloy thermodynamics and material design and high-performance non-ferrous metal materials.

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	ZHU Zhenyu
	TU Hao
	WU Changjun
	PENG Haoping
	WANG Jianhua
	SU Xuping

Cite this article:

ZHU Zhenyu,TU Hao,WU Changjun, et al. Effect of Melting and Casting Process on Size and Distribution of Insoluble Phase in Aluminum Alloy 2618[J]. Materials Reports, 2021, 35(4): 4129-4133.

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http://www.mater-rep.com/EN/10.11896/cldb.19090047 OR http://www.mater-rep.com/EN/Y2021/V35/I4/4129

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