张世超,郑小平,陈连生,张其鹏,王青云,王瑞清

• 1:华北理工大学冶金与能源学院

摘要(Abstract)：

利用冷轧与半固态热处理工艺(冷轧SIMA法)制备了AZ91D镁合金半固态坯料,研究了不同冷轧压下量对半固态坯料显微组织与压缩性能的影响,并探讨了固相颗粒的球化机制与半固态坯料的成形机制。结果表明:随着冷轧压下量的增加,固相颗粒的平均尺寸逐渐的减小、球形率逐渐地增大,液相率逐渐地增大,而半固态坯料的压缩性能呈先升后降的趋势;当冷轧压下量低于8.72%时,对半固态坯料显微组织的影响较为敏感。半固态加热时,固相颗粒的原子尺度界面由光滑小晶面转变为粗糙非小晶面,宏观表现为多边形转变为球形;且随着冷轧压下量的增大,该球形化过程的转变速度显著提高。

关键词(KeyWords)： AZ91D镁合金;半固态加工;SIMA法;组织形态;压缩性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51474091);; 河北省自然科学基金(E2013209268);; 华北理工大学大学生创新创业训练计划项目(X2015039)

作者(Author): 张世超,郑小平,陈连生,张其鹏,王青云,王瑞清

DOI: 10.13289/j.issn.1009-6264.2016.04.010

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