中间退火对镁合金板材组织和性能的影响Influence of intermediate annealing on microstructure and mechanical property of magnesium alloy sheet
彭伟平,刘腾,何良菊,李培杰,曾攀
摘要(Abstract):
研究AZ31B镁合金轧制道次间不同退火温度和时间对板材微观组织和力学性能的影响,分析了拉伸试样断口形貌。实验结果表明,退火处理后镁合金板材由轧制纤维组织转变为均匀等轴的再结晶组织,退火再结晶的起始温度为200℃;退火后的力学性能得到一定程度的恢复,硬度、屈服强度最大降幅分别为25.4%和37.1%,伸长率最大增幅达31.3%,拉伸断口由解理和韧窝混合断口转变为典型韧性断口。实验得到镁合金中间退火的较佳工艺为:退火温度300~320℃,退火时间60~120min。
关键词(KeyWords): 镁合金板材;中间退火;微观组织;力学性能
基金项目(Foundation): 国家“十五”863国际合作重点项目(2002AADF3306)
作者(Author): 彭伟平,刘腾,何良菊,李培杰,曾攀
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