| AZ31镁合金铸坯均匀化退火 |
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| 引用本文： | 艾秀兰,杨军,权高峰.AZ31镁合金铸坯均匀化退火[J].金属热处理,2009,34(12). |
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| 作者姓名： | 艾秀兰 杨军 权高峰 |
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| 作者单位： | 1. 大连交通大学,材料科学与工程学院辽宁省轨道交通关键材料重点实验室,辽宁,大连,116028
2. 大连交通大学,材料科学与工程学院 |
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| 摘 要： | 研究了一种新的均匀化退火工艺对AZ31镁合金铸坯组织转变和成分均匀化的影响,保温温度为530、540和550 ℃以及保温时间为30、60和90 min.结果表明,AZ31镁合金在固相线温度以下应尽可能提高退火温度,同时缩短退火时间可使铸坯达到较好的均匀化效果,消除大部分枝晶偏析,γ-Mg_(17)Al_(12)相在α-Mg基体上呈细小的颗粒状分布; AZ31镁合金铸锭的优化退火工艺为540 ℃保温60 min.
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| 关 键 词： | AZ31镁合金 均匀化退火 显微组织 |
Homogenizing annealing of as-cast AZ31 magnesium alloy |
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| AI Xiu-lan,YANG Jun,QUAN Gao-feng.Homogenizing annealing of as-cast AZ31 magnesium alloy[J].Heat Treatment of Metals,2009,34(12). |
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| Authors: | AI Xiu-lan YANG Jun QUAN Gao-feng |
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| Abstract: | The effects of a new homogenizing annealing process on phase transformation and composition homogenization of as-cast AZ31 magnesium alloy were investigated.The annealing temperatures were 530,540,550 ℃ and holding time was 30,60,90 min respectively.The results show that under solidus line with increasing annealing temperature and shortening annealing time,the better annealing effectiveness can be attained.After homogenizing,the γ-Mg_(17)Al_(12) phase dispersed in the α-Mg matrix as fine particles,and dendritic segregation is almost eliminated.According to the microstructure,the optimal homogenizing annealing process of the alloy is heating at 560 ℃ for 60 min. |
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| Keywords: | AZ31 magnesium alloy homogenizing annealing microstructure |
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