架空输电用高电导率铝线研究

分析了20种架空输电导线用硬态铝线的元素组成以及各种杂质元素含量与硬态铝线电导率之间的关系。结果表明,杂质元素总量与电导率并不完全呈负线性关系,微量杂质元素Ti、V、Mn和Cr对其电导率有显著影响,稀土元素对高电导率铝线并无直接影响,适量B元素可有效改善铝线电导率。在杂质元素总量低于0.20%时,仅当w(Ti+V+Mn+Cr)<0.001%、w(Fe)<0.10%,w(Si)<0.05%时,才可使硬态铝线的电导率高于36.25MS/m,同时才可保证其对应软态铝线电导率达到37.12MS/m以上。

High Conductivity Aluminum Wire for Overhead Conductors

The element composition of 20 kinds of hard aluminum wires for overhead transmission lines was analyzed,and the relationship between the content of each impurity element and the conductivity was investigated.The results reveal that the total amount of impurity elements is not completely negative linear to conductivity,while the trace impurity elements Ti,V,Mn and Cr have significant effects on the conductivity.Proper amount of boron can effectively improve the conductivity,while rare earth elements can be ignored for effect on wires.Under the condition that the total amount of impurity elements is less than 0.20%,only when w(Ti+V+Mn+Cr)is less than 0.001%,w(Fe)is less than 0.10%,and w(Si)is less than 0.05%,the conductivity of hard aluminum wire can be higher than 36.25 MS/m,and that of the related annealed aluminum wire can be guaranteed to reach above 37.12 MS/m.