Effects of Electromagnetic Stirring on Microstructure and Properties of In-Situα-Al<sub>2</sub>O<sub>3p</sub>/ZL109 Composites for Pistons

Xu Jinkang; Chen Gang; Zhang Zhenya; Zhao Yutao; Zhou Xiang; Liu Xin; Yan Qing

doi:10.15980/j.tzzz.2018.06.021

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Effects of Electromagnetic Stirring on Microstructure and Properties of In-Situα-Al₂O_3p/ZL109 Composites for Pistons
Vol. 38, Issue 6, Pages: 651-656(2018)
Published： 2018 ，
DOI： 10.15980/j.tzzz.2018.06.021

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[1]徐进康,陈刚,张振亚,赵玉涛,周祥,刘新,严庆.电磁搅拌对Al_2O_(3p)/ZL109复合材料组织与性能的影响[J].特种铸造及有色合金,2018,38(06):651-656.

Xu Jinkang, Chen Gang, Zhang Zhenya, et al. Effects of Electromagnetic Stirring on Microstructure and Properties of In-Situα-Al₂O_3p/ZL109 Composites for Pistons. [J]. Special Casting & Nonferrous Alloys 38(6):651-656(2018)
[1]徐进康,陈刚,张振亚,赵玉涛,周祥,刘新,严庆.电磁搅拌对Al_2O_(3p)/ZL109复合材料组织与性能的影响[J].特种铸造及有色合金,2018,38(06):651-656. DOI： 10.15980/j.tzzz.2018.06.021.

Xu Jinkang, Chen Gang, Zhang Zhenya, et al. Effects of Electromagnetic Stirring on Microstructure and Properties of In-Situα-Al₂O_3p/ZL109 Composites for Pistons. [J]. Special Casting & Nonferrous Alloys 38(6):651-656(2018) DOI： 10.15980/j.tzzz.2018.06.021.

摘要

采用半固态机械搅拌法

结合电磁搅拌技术成功制备了α-Al

体积分数为5%的ZL109复合材料

研究了电磁搅拌对α-Al

颗粒分散性、力学性能及布氏硬度的影响

并测定了复合材料的线性热膨胀系数。结果表明

在电流为250A、频率为5Hz、磁感应强度为0.039T、时间为10 min的工艺条件下

α-Al

增强颗粒取得最佳的分散效果

基本无团聚。经T6热处理后

复合材料的抗拉强度和（HB）硬度为325 MPa和148

与基体相比

分别提高了10.2%和18.4%;因硬质α-Al

颗粒的引入

伸长率（2.7%）下降了20.6%。在30

00℃区间

复合材料的线性热膨胀系数值均低于ZL109基体合金。在30℃和400℃

复合材料的线性热膨胀系数与ZL109合金相比

分别降低了7.97%和3.79%。

Abstract

5%Al

/ZL109composites were fabricated successfully by semi-solid mechanical stirring with aid of electromagnetic stirring technology in A1/SiO

system.The effects of electromagnetic stirring on the dispersion ofα-Al

particles

tensile property and Brinell hardness of the composites were investigated.And the linear thermal expansion coefficient（LTEC）of ZL109and composites were also tested.The results reveal thatα-Al

particles present the desirable dispersion effect with current of250A

frequency of 5Hz

magnetic induction intensity of 0.039Tfor 10min

and agglomeration phenomenon can be ignored.Tensile strength and Brinell hardness of T6-treated composites reach 325MPa and 148HB

increased by 10.2%and 18.4%

respectively

compared with those of the matrix alloy.Because of the introduction of hardα-Al

particles

the elongation（2.7%）of composite is decreased by20.6%compared with that of ZL109 matrix alloy.At 30

00℃

the LTEC values of the composites are lower than those of ZL109.At 30℃and 400℃

the LTEC values of composites are decreased by7.97%and 3.79%compared with those of ZL109

respectively.

关键词

Al/SiO2体系熔体直接反应法复合材料线性热膨胀系数

Keywords

Al/SiO2 SystemDirect Melt ReactionCompositesLinear Thermal Expansion Coefficient

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Effects of Electromagnetic Stirring on Microstructure and Properties of In-Situα-Al2O3p/ZL109 Composites for Pistons

DOI： 10.15980/j.tzzz.2018.06.021

摘要

Abstract

关键词

Keywords

references

Effects of Electromagnetic Stirring on Microstructure and Properties of In-Situα-Al₂O_3p/ZL109 Composites for Pistons