大规格铸态7005铝合金的双级均热工艺优化  

Optimization of Two-stage Soaking Process for Large-size As-Cast 7005 As-Cast 7005 Aluminum Alloy

作　　者：何小峰 莫灼强 蒋秋妹[1,2] 赵启忠 黄奎[1,2] HE Xiaofeng-;MO Zhuoqiang;JIANG Qiumei;ZHAO Qizhong;HUANG Kuiu(Guangxi Alnan Aluminum Fabrication Co.,Ltd.,Nanning 530031,China;Guangxi Key Laboratory of Materials and Processes of Aluminum Alloys,Nanning 530031,China)

机构地区：[1]广西南南铝加工有限公司,广西南宁530031 [2]广西铝合金材料与加工重点实验室,广西南宁530031

出　　处：《铸造技术》2020年第3期223-227,共5页Foundry Technology

基　　金：广西南宁市江南区科技重大专项项目(2019010201)。

摘　　要：为优化工业化生产耗时长、耗能高、效率低的旧双级均热工艺,采用OM、SEM、图像分析软件及布氏硬度计,研究了双级均热工艺对大规格铸态7005铝合金圆锭显微组织和硬度的影响。结果表明:经450℃×2h+470℃×32h双级均热处理后,MgZn2弥散质点完全溶解,仅残留难溶的AlMnFe、AlMnFeSi等含Fe化合物相,均热效果与旧工艺的均热效果一致,可实现工业化节能降本提质增效的生态生产。In order to optimize the old two-stage homogeneous heat treatment process,which was time-consuming,energy-consuming and inefficient in industrial production,OM,SEM,image analysis software and Brinell hardness tester were used to study the effect of two-stage homogeneous heat treatment process on microstructure and hardness of large-size as-cast 7005 aluminum alloy round ingot.The results show that the MgZn2 dispersing particle is completely dissolved after the dual-stage homogenization treatment at 450℃×2 h+470℃×32 h,and only the remaining refractory phases of Al MnFe,Al MnFeSi and other Fe-containing compounds remained.The homogenization effect is consistent with that of the old process,and the ecological production of energy saving,quality improvement and efficiency enhancement could be realized in industrialization.

关 键 词：铸态7005铝合金 双级均热工艺 显微组织 硬度 节能降本 

分 类 号：TG166.3[金属学及工艺—热处理]