摘要
采用真空感应电炉熔炼获得含碳量不同的Cu-Cr合金铸锭,利用扫描电镜、硬度仪和涡流导电仪研究了碳元素的加入对Cu-Cr合金显微组织、力学性能和导电性的影响。结果表明,添加适当的碳元素可以同时提高Cu-Cr合金铸锭的硬度和导电性。在Cu-Cr合金中添加碳元素可导致：显微组织中的Cr枝晶逐渐发生破碎,球化和细化;促进了铸锭在熔炼冷却过程中Cu基体中固溶Cr元素的析出,形成细小的Cr颗粒弥散分布于Cu基体中;导电性普遍略高于未添加碳元素的试样;在碳元素添加量不高于0.2wt%时,随着碳元素含量的提高,Cu-Cr合金铸锭的显微硬度随之而增加。
Cu-Cr alloy ingots with different carbon content were prepared by using a vacuum induction furnace,and the effect of carbon on their microstructure,hardness and electrical conductivity was studied. The results show that both the hardness and the electrical conductivity of as-cast Cu-Cr alloy are improved by adding appropriate content of carbon. The addition of carbon results in that Cr-rich dendrites break into smaller pieces and to be spheroidized,promotes Cr precipitation to from fine dispersive Cr particles in the Cu matrix during the cooling process of vacuum melting,and the electrical conductivity of the samples with C addition is a litter higher than that without C. When the content of carbon is lower than 0. 2 wt%,the hardness of the Cu-Cr alloy ingot increases with the increasing of carbon content.
作者
姜江
陆德平
郭炜
陆磊
袁晓月
付青峰
Jiang Jiang 1,2 , Lu Deping1,2, Guo Wei1,2 , Lu Lei1,2 , Yuan Xiaoyue1,2 , Fu Qingfeng1,2(1. Jiangxi Academy of Seienees, Institute of Applied Physics, Nanehang Jiangxi 330029, China; 2. Jiangxi Key Laboratory of Advanced Copper and Tungsten Materials, Nanehang Jiangxi 330029, Chin)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第3期40-44,共5页
Heat Treatment of Metals
基金
国家自然科学基金(51561010)
江西省自然科学基金(20144ACB20013,20171ACB21068)
江西省重点研发计划(20171BBH80009)
关键词
CU-CR合金
碳微合金化
微观组织
力学性能
导电性能
Cu-Cr alloy
carbon microalloying
microstructure
mechanical properties
electrical conductivity
