时效时间对触变成形AZ63合金组织及力学性能的影响

张金雨; 陈体军; 张素卿; 王博; 王儒亮

doi:10.15980/j.tzzz.2015.08.014

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时效时间对触变成形AZ63合金组织及力学性能的影响
Effects of Aging Time on Microstructures and Mechanical Properties of Thixoformed AZ63 Magnesium Alloy
2015年35卷第8期页码：833-837
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.08.014

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[1]张金雨,陈体军,张素卿,王博,王儒亮.时效时间对触变成形AZ63合金组织及力学性能的影响[J].特种铸造及有色合金,2015,35(08):833-837.

Zhang Jinyu, Chen Tijun, Zhang Suqing, et al. Effects of Aging Time on Microstructures and Mechanical Properties of Thixoformed AZ63 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(8):833-837.
[1]张金雨,陈体军,张素卿,王博,王儒亮.时效时间对触变成形AZ63合金组织及力学性能的影响[J].特种铸造及有色合金,2015,35(08):833-837. DOI： 10.15980/j.tzzz.2015.08.014.

Zhang Jinyu, Chen Tijun, Zhang Suqing, et al. Effects of Aging Time on Microstructures and Mechanical Properties of Thixoformed AZ63 Magnesium Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(8):833-837. DOI： 10.15980/j.tzzz.2015.08.014.

摘要

研究了触变成形AZ63镁合金经不同时效时间处理后

组织及其力学性能的变化。结果表明

触变成形AZ63镁合金具有优良的时效强化效果

析出β相的分布位置、数量、形态随时效时间不断变化。连续析出相具有优异的弥散强化作用

而不连续析出相产生相反的作用。时效处理能够明显提升合金的抗拉强度和硬度

但伸长率有所下降。经过215℃时效处理2h后

抗拉强度达到最大值

为348MPa;硬度值（HV）在时效8h时达到最大

为69。与触变成形相比分别提高了53%和26%。断口形貌呈现明显的准解理特征。

Abstract

Effects of aging time on microstructures and mechanical properties of thixoforged AZ63 magnesium alloy were invstiagted.The results indicate that aging time affects the precipitation sites

volume fraction and shape of aging precipitation

and finally affects the mechanical properties and fracture behavior.The improvement of mechanical properties is attributed to the dispersion strengthen of continuous precipitation

and the decrease of mechanical properties is resulted from the harmful discontinuous lamellar precipitation.With the aging time increase

the fracture mode is transformed from intergranular into transgranular fracture.With aging at 215 ℃ for 2h

the tensile strength reaches 348 MPa

and hardness reaches 69（HV）with aged for 8h.Comparing with thixoforged AZ63 alloy

the tensile strength and hardness of the aged alloy are increases by 53% and by 26%

respectively.The fracture morphology is characterized by quasi-cleavage fracture.

关键词

触变成形AZ63镁合金时效时间力学性能微观组织

Keywords

ThixoformingAZ63Magnesium AlloyAging TimeMechanical PropertiesMicrostructure

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