热挤压对快速凝固Al-Si-Fe-Cu-Mg合金显微组织及性能的影响  

Effect of Hot Extrusion on Microstructure and Properties of Rapidly Solidified Al-Si-Fe-Cu-Mg Alloy

作　　者：张真[1] 孔喆灏 陈欢欢 杨明赛 张雨生 曹世举 魏海根 黄魏楼 胡先德 Zhang Zhen;Kong Zhehao;Chen Huanhuan;Yang Mingsai;Zhang Yusheng;Cao Shiju;Wei Haigen;Huang Weilou;Hu Xiande(School of Materials Science and Engineering,Hefei University of Technology,Hefei 230009,China;Jiangxi University of Science and Technology,Ganzhou 341099,China;Anqing Yade Dibo Piston Co.,Ltd.,Anqin 246000,China;Anqing Xieder Automotive Parts Co.,Ltd.,Anqin 246000,China)

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009 [2]江西理工大学,江西赣州341099 [3]安庆雅德帝伯活塞有限公司,安徽安庆246000 [4]安庆谢德尔汽车零部件有限公司,安徽安庆246000

出　　处：《有色金属加工》2024年第3期26-31,共6页Nonferrous Metals Processing

基　　金：安徽省重点研究与开发计划项目(2021a05020047,2022a05020032)。

摘　　要：采用单辊旋淬法制备了快速凝固Al-20Si-5Fe-Cu-Mg合金,采用了SEM对其进行观察分析。结果表明,快速凝固能够极大细化Al-20Si-5Fe-Cu-Mg合金组织,抑制Si相及β-Fe相的析出长大,且组织的细化程度呈梯度分布。对快速凝固Al-20Si-5Fe-Cu-Mg合金进行了不同工艺参数的热挤压实验。结果表明,粉末包套热挤压工艺能够使快速凝固Al-20Si-5Fe-Cu-Mg带材合金致密化,当挤压温度为400℃、挤压比为1∶16时,合金获得了较优异的力学性能,其屈服强度和抗拉强度分别达到了456 MPa和805 MPa,压缩率为9.3%。In this paper,rapid solidification Al-20Si-5Fe-Cu-Mg alloy is prepared by single roll spinning quenching method,and observed and analyzed by SEM.The results indicate that rapid solidification can greatly refine the microstructure of Al-20Si-5Fe-Cu-Mg alloy,suppress the precipitation and growth of Si phase andβ-Fe phase,and the refinement degree of the microstructure is gradient distribution.Hot extrusion experiments are conducted on rapidly solidified Al-20Si-5Fe-Cu-Mg alloy with different process parameters.The results show that the powder encapsulated hot extrusion process can densify the rapidly solidified Al-20Si-5Fe-Cu-Mg strip alloy.When the extrusion temperature is 400℃and the extrusion ratio is 1∶16,the alloy obtains excellent mechanical properties,with yield strength and compressive strength reaching 456MPa and 805MPa,respectively,and a compression rate of 9.3%.

关 键 词：Al-20Si-5Fe-Cu-Mg合金 快速凝固 热挤压 压缩强度 压缩率 

分 类 号：TG244.3[金属学及工艺—铸造] TG379