稀土La微合金化纯铜组织性能研究  

Research on Micro-structure and Properties of Micro-alloyed Pure Copper with the Addition of Rare Earth Element La

作　　者：孟凡硕 陈立鹏[1] 刘劲松[1,2] 陈岩[2] 

机构地区：[1]沈阳理工大学材料科学与工程学院,辽宁沈阳110159 [2]中国科学院金属研究所,辽宁沈阳110016

出　　处：《铜业工程》2016年第2期24-27,共4页Copper Engineering

摘　　要：利用微合金化原理将稀土La添加到纯铜中,通过真空熔炼炉熔炼出不同稀土La含量的微合金化铜合金,探究不同稀土La含量对铸态纯铜组织及性能的影响。成分分析的结果表明,稀土La添加可以显著去除纯铜中Si、Pb等杂质元素,且在实验添加量范围内,稀土含量越高净化作用越明显;组织观测的结果表明,稀土La添加可以有效细化纯铜的晶粒,稀土含量越高晶粒越细小;力学性能测试的结果表明,稀土La添加可以显著提高纯铜的抗拉强度与硬度,但其延伸率随着稀土含量的增加呈现先升高后下降的趋势,且均低于原始纯铜。总的来看,La含量为0.089%的微合金化纯铜试样的综合性能最佳。Taking use of the micro-alloying principle, the rare earth element La was added into the pure copper. Then the microalloyed copper alloys with different content of La were produced by the vacuum melting furnace, and the microstructure and properties of the as-cast copper micro-alloyed with different content of La were explored. The composition analysis shows that the addition of La can effectively remove the impurity elements Si and Pb in the pure copper. And in the experimental range, the more the rare earth La added, the more obvious the purification worked; The results of microstructure observation show that the addition of La can also effectively refine the grain of copper, however the higher the content of La, the smaller the grain size is; Mechanical property tests show that the tensile strength and hardness improved after La addition. As the La content increased, the elongation of the samples increased first and then decreased. However the elongation of all the micro-alloyed copper alloys is lower than the initial pure copper. In general, the comprehensive performance of the micro-alloyed pure copper with the content of 0.089% La is better.

关 键 词：微合金化 LA 铸态纯铜 成分分析 组织观测 力学性能 

分 类 号：TG146.11[一般工业技术—材料科学与工程]