摘要
以Al-0.5Mg-0.24Si合金为研究对象,探讨了稀土元素La对合金微观组织、导电性能、力学性能及耐腐蚀性的影响。结果表明,La能与Si形成LaSi2稀土相,并且促进富Fe相从β-Al5FeSi向α-Al8Fe2Si转变。经过热轧和热处理后,适量La的加入可提高Al-0.5Mg-0.24Si合金的电导率和力学性能。当La的加入量为0.1%时,合金电导率最高,为31.80 MS/m;当La的加入量为0.3%,合金抗拉强度为175 MPa,伸长率为22%。但La的加入会降低铝合金的耐腐蚀性能。
Taking Al-0.5 Mg-0.24 Si alloy as object, the effects of rare earth element La on the microstructure, electrical conductivity, mechanical properties and corrosion resistance of Al-0.5 Mg-0.24 Si alloy were investigated. The results indicate that the combination of La with Si can generate rare earth phase LaSi_(2), which promotes the transformation from the β-Al_(5)FeSi phase to α-Al_(8)Fe_(2)Si phase. After hot rolling and heat treatment, the appropriate addition of La can enhance the electrical conductivity and tensile properties of Al-0.5 Mg-0.24 Si alloy. With the addition of 0.1% La, the electrical conductivity reaches the maximum value of 31.80 MS/m. With the addition of 0.3% La, the tensile strength and the elongation reach 175 MPa and 22%, respectively, whereas the addition of La can reduce the corrosion resistance of Al alloy.
作者
赵燕
张宇博
李廷举
王玮
李绍威
许晨玲
Zhao Yan;Zhang Yubo;Li Tingju;Wang Wei;Li Shaowei;Xu Chenling(Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology;Ningbo Institute of Dalian University of Technology;Dalian Huicheng Aluminum Co..Ltd.)
出处
《特种铸造及有色合金》
CAS
北大核心
2021年第10期1219-1223,共5页
Special Casting & Nonferrous Alloys
基金
国家自然科学基金资助项目(51971048)
大连理工大学重点实验室科研专题资助项目(DUT20LAB141)
兴辽英才计划团队资助项目(XLYC1808005)。
关键词
稀土元素LA
AL-MG-SI合金
电导率
力学性能
耐腐蚀性能
Rare Earth Element La
Al-Mg-Si Alloy
Electrical Conductivity
Mechanical Properties
Corrosion Resistance
