张庆,谭俊,谢凤宽,孟令东,臧艳,朱晓莹.电流密度对喷射电沉积Co-Ni-Cr3C2复合镀层组织及性能的影响[J].表面技术,2020,49(5):191-199.
ZHANG Qing,TAN Jun,XIE Feng-kuan,MENG Ling-dong,ZANG Yan,ZHU Xiao-ying.Effects of Jet Electrodeposition Current Density on Microstructure and Properties of Co-Ni-nano Cr3C2 Composite Coatings[J].Surface Technology,2020,49(5):191-199
电流密度对喷射电沉积Co-Ni-Cr3C2复合镀层组织及性能的影响
Effects of Jet Electrodeposition Current Density on Microstructure and Properties of Co-Ni-nano Cr3C2 Composite Coatings
投稿时间:2019-04-09  修订日期:2020-05-20
DOI:10.16490/j.cnki.issn.1001-3660.2020.05.023
中文关键词:  喷射电沉积  电流密度  Co-Ni-Cr3C2  复合镀层  组织  性能
英文关键词:jet electrodeposition  current density  Co-Ni-Cr3C2  composite coating  microstructure  performance
基金项目:
作者单位
张庆 1.陆军装甲兵学院,北京 100072 
谭俊 1.陆军装甲兵学院,北京 100072;2.陆军装甲兵学院再制造技术重点实验室,北京 100072 
谢凤宽 1.陆军装甲兵学院,北京 100072 
孟令东 1.陆军装甲兵学院,北京 100072 
臧艳 1.陆军装甲兵学院,北京 100072 
朱晓莹 1.陆军装甲兵学院,北京 100072 
AuthorInstitution
ZHANG Qing 1.Army Academy of Armored Forces, Beijing 100072, China 
TAN Jun 1.Army Academy of Armored Forces, Beijing 100072, China; 2.Science and Technology on Remanufacturing Laboratory, Army Academy of Armored Forces, Beijing 100072, China 
XIE Feng-kuan 1.Army Academy of Armored Forces, Beijing 100072, China 
MENG Ling-dong 1.Army Academy of Armored Forces, Beijing 100072, China 
ZANG Yan 1.Army Academy of Armored Forces, Beijing 100072, China 
ZHU Xiao-ying 1.Army Academy of Armored Forces, Beijing 100072, China 
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中文摘要:
      目的 研究不同电流密度下,Co-Ni-Cr3C2纳米复合镀层中纳米Cr3C2的含量变化及其对组织性能的影响,确定最佳电流密度。方法 采用喷射电沉积的方法,选择不同电流密度(30、40、50、60 A/dm2)制备Co-Ni-Cr3C2纳米复合镀层。利用SEM、XRD、显微硬度计、摩擦磨损试验机、3D 测量激光显微镜对Co-Ni-Cr3C2纳米复合镀层的形貌、成分、结构、硬度和耐磨性能进行研究,并对Co-Ni-Cr3C2纳米复合镀层和Co-Ni合金镀层在不同退火温度下的硬度变化进行比较。结果 纳米Cr3C2颗粒的加入未明显改变Co-Ni的异常共沉积,在电流密度为40 A/dm2时,Co-Ni-Cr3C2纳米复合镀层中Cr3C2纳米颗粒的质量分数最高,为12.05%。复合镀层表面凹凸不平,呈瘤状结构。电流密度的增加对复合镀层的成分及相结构影响不大,出现了Co和Cr3C2的衍射峰。Co-Ni-Cr3C2纳米复合镀层的硬度随电流密度的升高,先增大后减小,在电流密度为40 A/dm2时,硬度最高,为585HV0.05。复合镀层的摩擦系数在电流密度为30、60 A/dm2时波动较大,在40、50 A/dm2时波动较小。其磨损体积随电流密度的升高,先减少后增加,在40 A/dm2时,磨损体积最小。Co-Ni-Cr3C2纳米复合镀层硬度随退火温度的升高,先升高后降低,在退火温度为400 ℃时,显微硬度最高,为602HV0.05。结论 Co-Ni-Cr3C2纳米复合镀层在电流密度发生变化时,其Cr3C2纳米颗粒的沉积量、硬度及耐磨性均发生了变化,在电流密度为40 A/dm2时,沉积量最高,硬度和耐磨性能最佳。此外,Co-Ni-Cr3C2纳米复合镀层在高温退火条件下仍能保持较高的硬度。
英文摘要:
      The work aims to study effects of different current densitieson the microstructure and properties of Co-Ni-nano Cr3C2 composite coatings and determine optimal current density. Co-Ni-nano Cr3C2 composite coatings were prepared by spray electrodeposition at current densities of 30 A/dm2, 40 A/dm2, 50 A/dm2 and 60 A/dm2. The morphology, composition, structure, hardness and wear resistance of Co-Ni-nano Cr3C2composite coatings were studied with SEM, XRD, microhardness tester, friction wear tester and 3D laser microscope. The microhardness changes of Co-Ni-nano Cr3C2 composite coating and Co-Ni composite coating at different annealing temperatures were compared. The results showed that the addition of nano-Cr3C2 particles did not significantly change the anomalous process of Co-Ni co-deposition. When the current density was 40 A/dm2, the mass fraction of nano-Cr3C2 particles in the Co-Ni-nano Cr3C2 composite coating was up to 12.05%; the surface of the composite coating was rugged and had a nodular structure; the increase of current density had little effect on the composition and phase structure of the composite coating, and the diffraction peaks of Co and Cr3C2 appeared in the composite coating; the microhardness of Co-Ni-nano Cr3C2 composite coating increased first and then decreased with the increase of current density. The highest microhardness value was 585HV0.05 when the current density was 40 A/dm2; the friction coefficient of the composite coating fluctuated greatly when the current density was 30 A/dm2 and 60 A/dm2, but smaller when the current density was 40 A/dm2 and 50 A/dm2. Its wear volume decreased at first and then increased with the increase of current density; when the current density was 40 A/dm2, the wear volume was the smallest and the microhardness of Co-Ni-nano Cr3C2 composite coating increased at first and then decreased with the increase of annealing temperature. When the annealing temperature was 400 ℃, the highest microhardness was 602HV0.05. The deposition amount hardness and wear resistance of nano-Cr3C2 particles in Co-Ni-nano Cr3C2 composite coating change with the current density. When the current density is 40 A/dm2, Co-Ni-nano Cr3C2 composite coating has the highest deposition and the best microhardness and wear resistance. The microhardness of Co-Ni-nano Cr3C2 composite coating can still be maintained at high annealing temperature.
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