黄晓锋,张玉,秦牧岚,郝远

• 1:兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室
• 2:兰州理工大学有色金属合金及加工教育部重点试验室

摘要(Abstract)：

通过半固态等温热处理,研究了重熔温度和保温时间对铸造ZC63镁合金半固态组织演变的影响。结果表明:半固态等温热处理能够将ZC63合金中的枝晶组织转变为球状组织,并可获得更加细小、分布均匀的球状颗粒;重熔温度和保温时间对非枝晶组织演变有着重要的影响,提高保温温度或延长保温时间,可加快原始铸锭重熔进程及组织形态的优化,保温温度过高或保温时间过长,试样会发生严重变形,同时球状颗粒易于粗化和长大;非枝晶组织演变是在熔化和结晶的动态变化中完成,主要的演变机制是在等温热处理过程中晶界处的共晶组织向基体溶解,原始组织的粗化、分离、球化以及球状颗粒的合并与长大。ZC63合金半固态触变成形最适合的等温热处理工艺是600℃×30 min。

关键词(KeyWords)： ZC63镁合金;半固态等温热处理;非枝晶组织;演变机理

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51464032);; 国家973计划(2010CB635106)

作者(Author): 黄晓锋,张玉,秦牧岚,郝远

DOI: 10.13289/j.issn.1009-6264.2016.08.010

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