Y对C611铝合金凝固组织及性能的影响  

Effect of Y on Solidification Structure and Mechanical Properties of C611 Alloy

作　　者：娄鑫宇 孟令刚[1,2] 史淑艳 王荫洋[3] 亚斌 周秉文[1,2] 王军 宋运坤[3] 张兴国 LOU Xin-yu;MENG Ling-gang;SHI Shu-yan;WANG Yin-yang;YA Bin;ZHOU Bing-wen;WANG Jun;SONG Yun-kun;ZHANG Xing-guo(School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,Liaoning,China;Ning Bo Institute of Dalian University of Technology,Ningbo 315000,Zhejiang,China;Ningbo Branch of China Academy of Ordnance Science,Ningbo 315048,Zhejiang,China)

机构地区：[1]大连理工大学材料科学与工程学院,辽宁大连116024 [2]大连理工大学宁波研究院,浙江宁波315000 [3]中国兵器科学研究院宁波分院,浙江宁波315048

出　　处：《铸造》2024年第9期1225-1232,共8页Foundry

基　　金：国家重点研发计划资助项目(2018YFA0702900);中央高校基本科研业务费(DUT22QN243);科技创新2025重大专项:宁波市重大科技任务攻关项目(2022Z046)。

摘　　要：研究了添加Y元素对C611铝合金凝固组织和力学性能的影响。结果表明,随着Y含量的增加,C611合金中的α-Al组织的二次枝晶间距和共晶Si逐渐细化、变质,割裂基体的针状Al_(4)(Fe,Mn)Si_(2)相尺寸逐步减小。当Y含量为0.10%时,Al_(4)(Fe,Mn)Si_(2)相的平均长度由48.65μm减小到28.20μm,部分Fe以颗粒状Al_(15)(Fe,Mn)4Si_(2)相形式析出弥散分布在共晶硅当中,对基体起到了一定的强化作用;此时铝合金的抗拉强度和伸长率为166 MPa和6.2%,较未添加Y的基体合金分别提升了7.1%和29.2%。In this paper,the effect of Y addition on the solidification structure and mechanical properties of C611 aluminum alloy was studied.The results showed that with the increase of Y content,the secondary dendrite arm spacing and eutectic Si ofα-Al structure in C611 alloy were gradually refined and modified,and the size of needle-like Al_(4)(Fe,Mn)Si_(2)phase separated from the matrix was gradually reduced.When the Y content was 0.10%,the average length of Al_(4)(Fe,Mn)Si_(2)phase decreases from 48.65μm to 28.20μm,and some Fe was precipitated in the form of granular Al_(15)(Fe,Mn)_(4)Si_(2)phase and dispersed in the eutectic silicon,which played a certain role in strengthening the matrix.At this time,the tensile strength and elongation of the aluminum alloy were 166 MPa and 6.2%,which were 7.1%and 29.2%higher than those of the matrix alloy without Y addition.

关 键 词：C611铝合金 稀土元素Y 凝固组织 抗拉强度 

分 类 号：TG146.2[一般工业技术—材料科学与工程] TG113[金属学及工艺—金属材料]