固溶处理对半固态成形过共晶Al-Si-Cu-Mg合金组织与性能的影响

罗惠馨; 郝建飞; 孔昭阳; 袁晓光; 于宝义; 郑黎; 李润霞

doi:10.15980/j.tzzz.2019.04.010

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固溶处理对半固态成形过共晶Al-Si-Cu-Mg合金组织与性能的影响
Effects of Solution Treatment on Microstructures and Properties of Semi-solid Forming Hypereutectic Al-Si-Cu-Mg Alloy
2019年39卷第4期页码：386-390
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.04.010

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[1]罗惠馨,郝建飞,孔昭阳,袁晓光,于宝义,郑黎,李润霞.固溶处理对半固态成形过共晶Al-Si-Cu-Mg合金组织与性能的影响[J].特种铸造及有色合金,2019,39(04):386-390.

Luo Huixin, Hao Jianfei, Kong Zhaoyang, et al. Effects of Solution Treatment on Microstructures and Properties of Semi-solid Forming Hypereutectic Al-Si-Cu-Mg Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(4):386-390.
[1]罗惠馨,郝建飞,孔昭阳,袁晓光,于宝义,郑黎,李润霞.固溶处理对半固态成形过共晶Al-Si-Cu-Mg合金组织与性能的影响[J].特种铸造及有色合金,2019,39(04):386-390. DOI： 10.15980/j.tzzz.2019.04.010.

Luo Huixin, Hao Jianfei, Kong Zhaoyang, et al. Effects of Solution Treatment on Microstructures and Properties of Semi-solid Forming Hypereutectic Al-Si-Cu-Mg Alloy[J]. Special Casting & Nonferrous Alloys, 2019,39(4):386-390. DOI： 10.15980/j.tzzz.2019.04.010.

摘要

研究了固溶时间对半固态成形过共晶Al-Si-Cu-Mg合金显微组织与力学性能的影响。结果表明

固溶处理改善了合金的显微组织

提高了合金的力学性能。随着固溶时间延长

共晶Si相发生颈缩、溶断及粒状化

初生Si相钝化

Cu相等强化相尺寸减小

合金的力学性能提高。当固溶10h时

合金的抗拉强度、屈服强度和硬度（HB）达到峰值

分别为311MPa、291 MPa和132.0。随着固溶时间继续延长

共晶Si粗化

合金的力学性能降低。

Abstract

The effects of solution time on microstructures and mechanical properties of semi-solid forming hypereutectic Al-Si-Cu-Mg alloy were investigated.The results show that the solution treatment can improve the microstructures and mechanical properties of the alloy.With the increase of solid solution time

the eutectic Si phase is necked

melted and granulated

and the primary Si phase is passivated

meanwhile the Al

Cu equivalent strengthening phases are decreased

which are responsible for the improvement of mechanical properties of the semi-solid alloy.The tensile strength

yield strength and hardness of the alloy reach 311 MPa

291 MPa and 132.0 HB

respectively

after solution treatment for 10 h.With the solid solution time further increase

the eutectic Si is grown

So the mechanical properties of the semi-solid alloy are decreased.