Effects of Semi-solid Processing Parameters on Microstructure of Semi-solid AZ91 Alloy

Li Youxin; Jin Chen; Duo Xingmao; Zhang Yi

doi:10.15980/j.tzzz.2016.09.016

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Effects of Semi-solid Processing Parameters on Microstructure of Semi-solid AZ91 Alloy
Vol. 36, Issue 9, Pages: 958-961(2016)
Published： 2016 ，
DOI： 10.15980/j.tzzz.2016.09.016

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[1]李有新,金晨,朵兴茂,张翼.AZ91合金的流变压铸工艺及组织性能[J].特种铸造及有色合金,2016,36(09):958-961.

Li Youxin, Jin Chen, Duo Xingmao, et al. Effects of Semi-solid Processing Parameters on Microstructure of Semi-solid AZ91 Alloy. [J]. Special Casting & Nonferrous Alloys 36(9):958-961(2016)
[1]李有新,金晨,朵兴茂,张翼.AZ91合金的流变压铸工艺及组织性能[J].特种铸造及有色合金,2016,36(09):958-961. DOI： 10.15980/j.tzzz.2016.09.016.

Li Youxin, Jin Chen, Duo Xingmao, et al. Effects of Semi-solid Processing Parameters on Microstructure of Semi-solid AZ91 Alloy. [J]. Special Casting & Nonferrous Alloys 36(9):958-961(2016) DOI： 10.15980/j.tzzz.2016.09.016.

摘要

采用半固态流变压铸方法对AZ91合金进行了压铸处理

研究了手轮开合度（增压压力和压射速度）、浇注温度和充填时间对AZ91合金铸件的成形、显微组织和力学性能的影响

并分析了其作用机理。结果表明

AZ91合金适宜的半固态压铸工艺:手轮开合度为1 080°、浇注温度为585℃、充填时间为3s;在此工艺下得到的AZ91合金压铸件的表面质量较好

硬度（HBW）达到83

合金的抗拉强度、屈服强度和伸长率分别为285 MPa、172 MPa和4.9%。

Abstract

The AZ91 alloy was prepared by semi-solid rheological die-casting

and effects of the hand wheel opening angle

pouring temperature and filling time on casting forming

microstructure and mechanical properties of AZ91 alloy were analyzed.In addition

the formation mechanism was described.The results show that the suitable semi-solid die casting process of AZ91 alloy are presented as follows:hand wheel opening angle of 1 080°

pouring at 585℃and filling for 3s.The semi-solid die casting parts has the satisfied surface quality

and brinell hardness

tensile strength

yield strength and elongation of the die casting parts reach 83 HBW

285 MPa

172 MPa and 4.9%

respectively.