低过热度倾斜板流变压铸对ADC12组织及力学性能的影响

汪鹏程; 柳飞洪; 闫赛飞; 张龙

doi:10.15980/j.tzzz.2022.05.003

研究·半固态加工 | 浏览量 : 0 下载量: 27 CSCD: 0

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低过热度倾斜板流变压铸对ADC12组织及力学性能的影响
Effects of Low Superheat Inclined Plate Rheo-diecasting on Microstructure and Mechanical Properties of ADC12 Aluminum Alloy
2022年42卷第5期页码：540-545
纸质出版日期： 2022 ，
DOI： 10.15980/j.tzzz.2022.05.003

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汪鹏程, 柳飞洪, 闫赛飞, 等. 低过热度倾斜板流变压铸对ADC12组织及力学性能的影响[J]. 特种铸造及有色合金, 2022,42(5):540-545.

Wang Pengcheng, Liu Feihong, Yan Saifei, et al. Effects of Low Superheat Inclined Plate Rheo-diecasting on Microstructure and Mechanical Properties of ADC12 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2022,42(5):540-545.
汪鹏程, 柳飞洪, 闫赛飞, 等. 低过热度倾斜板流变压铸对ADC12组织及力学性能的影响[J]. 特种铸造及有色合金, 2022,42(5):540-545. DOI： 10.15980/j.tzzz.2022.05.003.

Wang Pengcheng, Liu Feihong, Yan Saifei, et al. Effects of Low Superheat Inclined Plate Rheo-diecasting on Microstructure and Mechanical Properties of ADC12 Aluminum Alloy[J]. Special Casting & Nonferrous Alloys, 2022,42(5):540-545. DOI： 10.15980/j.tzzz.2022.05.003.

摘要

采用金相显微镜、X射线衍射仪和扫描电镜等手段研究了低过热度倾斜板流变压铸ADC12合金的组织演变及形成机理，并测试其力学性能。结果表明，随着与压铸机压室距离的增加，合金组织由粗大枝晶成长为球形或近球形晶粒。组织形成机理包括了枝晶的破碎和熔体爆发形核。另外，半固态压铸提高了合金的力学性能，抗拉强度达到248 MPa

伸长率也略优于常规压铸。

Abstract

The microstructure evolution and formation mechanism of rheo-die-casting ADC12 alloy for low superheat inclined plate were investigated by means of metallography

X-ray diffraction and scanning electron microscope

and its mechanical properties were tested. The results show that the microstructure of the alloy is converted from coarse dendrites to spherical or near-spherical grains with the increase of the distance from the pressure chamber. The mechanism of microstructure formation is attributed to dendrite fragmentation and melt explosion nucleation. It is also proved that rheo-die-casting can improve the mechanical properties of the alloy

where the tensile strength reaches 248 MPa and the elongation is slightly better than that of conventional ones.