火场中铝合金导线熔痕的定量金相分析

Quantitative metallographic analysis of aluminum alloy conductors of fire electric arc beads

借助计算机图像处理技术和金相分析技术对铝合金导线短路及火烧熔痕的晶粒与气孔的特点进行定性与定量分析,并依次与相同条件下铝导线熔痕金相组织特征对比。结果表明:铝合金导线一次、二次短路熔痕及火烧熔痕在晶粒、气孔的大小、形状等方面的几何参数有一定的差异,且与同条件铝导线熔痕在晶粒面积、气孔分布上也有差异。

Using the computer image processing technology and the metallographic analysis technique,the characteristics of the grain and the pores on the electric arc beads and globules,which formed from the aluminum alloy conductor,are analyzed,and the character⁃istics of the aluminum conductors are compared in order.The re⁃sults show the difference on geometric parameters of aluminum al⁃loy conductors of the electric arc beads and globules in the size and shape of the grain.In addition,the size and shape of the grains and pores,as well as the distribution of the pores,differ in the arc beads and globules formed from the aluminum conductors.