Effects of Solid Solution Treatment on Semi-solid Microstructure of AM60B Magnesium Alloy

Bao Rui; Chen Tijun; Huang Haijun; Liu Mingwei

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Effects of Solid Solution Treatment on Semi-solid Microstructure of AM60B Magnesium Alloy
Vol. 31, Issue 3, Pages: 213-216(2011)
Published： 2011 ，
DOI：

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[1]包蕊,陈体军,黄海军,刘明伟.固溶处理对AM60B镁合金半固态组织的影响[J].特种铸造及有色合金,2011,31(03):213-216+190.

Bao Rui, Chen Tijun, Huang Haijun, et al. Effects of Solid Solution Treatment on Semi-solid Microstructure of AM60B Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(3):213-216(2011)
[1]包蕊,陈体军,黄海军,刘明伟.固溶处理对AM60B镁合金半固态组织的影响[J].特种铸造及有色合金,2011,31(03):213-216+190. DOI：

Bao Rui, Chen Tijun, Huang Haijun, et al. Effects of Solid Solution Treatment on Semi-solid Microstructure of AM60B Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(3):213-216(2011) DOI：

摘要

采用金相显微镜（OM）、X射线衍射（XRD）研究了固溶处理对AM60B镁合金半固态组织的影响。结果表明

415℃固溶处理16h的AM60B镁合金锭料

经610℃部分重熔后可得到初生相颗粒细小、圆整、均匀的半固态组织。AM60B镁合金经415℃×16h固溶处理后

β-Mg17Al12相已完全溶解于α-Mg基体中。在610℃的等温热处理过程中

固溶阶段粗化的枝晶臂重熔

从而导致组织分离是形成这种组织的主要原因。

Abstract

Effects of solid solution treatment on semi-solid microstructure of AM60B magnesium alloy were investigated by OM （optical microscope）

XRD （X-ray diffraction）. The results show that semi-solid structure with fine and uniform spherical primary phase can be observed in AM60B magnesium alloy billets which were treated for 16 hours at 415℃ and then partially remelted at 610℃. The β-Mg17Al12 phase is completely dissolved in the α-Mg matrix with solid solution treatment for 16 hours at 415℃. Remelting of coarsened dendrite from solid solution treatment results in the separation of structure in the semi-solid alloy with isothermal treatment at 610℃

which is responsible for the formation of desirable semi-solid slurry structure.