Ce含量和T6热处理对Al-0.3Fe-0.1Si合金组织与性能的影响

Effect of Ce Content and T6 Heat Treatment on Microstructure and Properties of Al-0.3Fe-0.1Si Alloy

研究了稀土元素Ce和T6热处理工艺对Al-0.3Fe-0.1Si合金组织和性能的影响。结果表明,添加适量的稀土Ce和T6热处理均可抑制晶粒长大,并有效细化Al-0.3Fe-0.1Si合金的晶粒尺寸。当稀土Ce的加入量为0.2%时,铸态合金的抗拉强度为81.7 MPa,比加入量为0.1%时提高了10.7%。稀土Ce的加入量为0.3%时,T6态合金的电导率为58.13%IACS,比铸态合金提高了2.3%。热处理前后的Al-0.3Fe-0.1Si-0.1Ce合金与Al-0.3Fe-0.1Si-0.3Ce合金的电导率接近。当稀土Ce的加入量为0.1%~0.2%时Al-0.3Fe-0.1Si合金获得较好的综合性能。本研究的结果可为导电Al-0.3Fe-0.1Si合金制备提供理论和试验参考。

This paper investigated the effects of rare earth Ce and T6 treatment on the microstructure and properties of Al-0.3Fe-0.1Si alloy.The results demonstrated that adding appropriate amounts of rare earth Ce and T6 treatment could inhibit grain growth and effectively refine the grain size of the Al-0.3Fe-0.1Si alloy.When the amount of rare earth Ce added was 0.2%,the tensile strength of the as-cast alloy was 81.7 MPa,which increased by 10.7%compared to that when the amount added was 0.1%.When the amount of rare earth Ce added was 0.3%,the electrical conductivity of the T6 alloy was 58.13%IACS,which increased by 2.3%compared to the as-cast alloy.The electrical conductivity of the Al-0.3Fe-0.1Si-0.1Ce alloy and Al0.3Fe-0.1Si-0.3Ce alloy were similar before and after heat treatment.The Al-0.3Fe-0.1Si alloy achieved its best performance with rare earth Ce added in the range of 0.1%-0.2%.The results of this study provided a theoretical and experimental reference for the preparation of conductive Al-0.3Fe-0.1Si alloy.