搅拌摩擦加工对铸态7075铝合金显微组织的影响

1.中国科学院金属研究所,沈阳,110016

2.中国科学院金属研究所,沈阳,110016

基金项目: 国家自然科学基金(50525103) 中国科学院百人计划课题辽宁省沈阳市技术创新开发研究基金

EFFECT OF FRICTION STIR PROCESSING ON THE MICROSTRUCTURE OF AS-CAST 7075 ALUMINUM ALLOY

采用搅拌摩擦加工对变形能力差的铸态7075铝合金进行改性加工,探讨了加工工艺对加工区显微组织的影响.加工工艺优化实验表明,在同样的工具设计和加工参数下,通过两道次重叠加工可在搅拌区获得均匀的细小等轴晶组织;此外,减小加工工具尺寸并提高旋转速度也可明显提高搅拌区显微观组织的均匀性.

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