热处理对Cu-14Fe-C合金组织和性能的影响  

Effect of heat treatment on microstructure and properties of Cu-14Fe-C alloy

作　　者：郭炜[1] 谌昀[1] 陆德平[1] 姜江[1] 陈威 付青峰[1] 刘素芬[1] Guo Wei;Shen Yun;Lu Deping;Jiang;Chen Wei;Fu Qingfeng;Liu Sufen(Institute of Applied Physics, Jiangxi Academy of Sciences, Nanchang Jiangxi 330096, Chin)

机构地区：[1]江西省科学院应用物理研究所

出　　处：《金属热处理》2018年第4期88-91,共4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重大项目(20144ACB20013);江西省重点研发计划(20171BBH80009);江西省科学院重点科研项目(2017-YZD2-20);江西省科学院普惠制项目(2015-XTPH1-11)

摘　　要：采用真空熔炼制备了Cu-14Fe-C合金，研究了热处理对合金显微组织、力学性能和导电性能的影响规律。结果表明：Cu-14Fe-C合金在950℃固溶处理后部分树枝状相发生溶解、数量减少，大量铁溶入铜基体中，合金硬度和导电率显著降低；进一步时效处理后基体上析出大量细小的含铁相颗粒，弥散强化作用使Cu-14Fe-C合金硬度有所提高；含铁相的析出使基体对电子的散射作用大大减弱，合金导电率显著提高，并且高于铸态合金。随着时效温度从400oC提高到550℃，合金硬度和导电率都不断升高，但接近550℃时升高的趋势显著减缓。Cu-14Fe-C alloy was prepared by vacuum melting method, and the influence of heat treatment on its microstructure, mechanical proper＇ties and conductivity were studied. The results show that dendritic phase in Cu-14Fe alloy can he spheroidized by carbon, and the hardness along with conductivity are remarkably improved. After heat treatment at 950 ℃, both the hardness and the conductivity of Cu- 14Fe-C alloy decrease significantly due to the fact that the dendritic phase partly dissolves and its quantity decreases, leading to a large amount of iron dissolves into the copper matrix. After further aging treatment, a large number of small iron particles precipitate out and the hardness of Cu-14Fe-C alloy slightly increases for dispersion strengthening. Precipitation of iron-containing phase greatly weakens electron scattering effect of the matrix, resulting in the conductivity increases significantly and exceeds that of cast alloy. As the aging temperature increases from 400 ℃ to 550 ℃, the hardness and conductivity of the alloy increase continuously, but the trend of increasing notably slows down at close to 550 ℃.

关 键 词：Cu-14Fe-C合金 热处理 显微组织 性能 

分 类 号：TG166[金属学及工艺—热处理]