技术:电磁搅拌对过共晶Al-Si-Cu-Mg合金半固态成形的影响

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冀恩龙,罗惠馨,孔昭阳,于宝义,郑黎,李润霞

(沈阳工业大学 材料科学与工程学院,辽宁沈阳)

摘要:

本文主要研究了半固态成型工艺对过共晶Al-Si-Cu-Mg合金显微组织与力学性能的影响。分析了电磁搅拌处理以及半固态成形工艺下过共晶Al-Si-Cu-Mg四元合金不同位置对合金组织和性能的影响,结果表明:经过电磁搅拌处理的半固态合金组织得到改善,力学性能得到提高。电磁搅拌60s时的铸件的组织中初生Si相更为平整圆滑,且分布更为均匀。在半固态挤压成形后坯锭半径的1/2处性能最佳,硬度达到105.8HB,抗拉强度和伸长率分别为237MPa、3.20%。

关键词:

半固态成型;过共晶Al-Si-Cu-Mg合金;显微组织;力学性能

Effect of Electromagnetic Stirring on Semi-solid Forming of Hypereutectic Al-Si-Cu-Mg Alloy

JIEn-long,LUO Hui-xin, KONG Zhao-yang, YU Bao-yi, ZHENG li, LI Run-xia

School of Materials Science and Engineering, Shenyang University of Technology, Shenyang , Liaoning, China

Abstract: Effect of semi-solid molding process on microstructure and mechanical properties of hypereutectic Al-Si-Cu-Mg alloy was investigated. The effects of ultrasonic melt treatment and semi-solid extrusion of different electromagnetic stirring on the microstructure and properties of the alloy were analyzed. The results show that the semi-solid alloy structure after electromagnetic stirring treatment is improved, and the mechanical properties are improved.The primary Si phase in the microstructure of the casting with electromagnetic stirring for 60 s is smoother and more evenly distributed. After semi-solid extrusion,the performance of 1/2 of the ingot radius is the best, the hardness reaches 105.8HB, and the tensile strength and elongation are 237MPa and 3.20%, respectively.

Keywords: Semi-solid molding process, Hypereutectic Al-Si-Cu-Mg alloy, microstructure, mechanical properties


技术:电磁搅拌对过共晶Al-Si-Cu-Mg合金半固态成形的影响


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