摘要
通过直流电沉积的方式在铜片基体表面制备不同BN含量的Ni-Mo-BN复合镀层,研究了镀液中不同浓度的BN粉末(5、10、15、20 g/L)以及Ni-Mo-BN镀层在经退火热处理后BN对膜层微观组织及硬度的影响规律。结果表明:电流密度在2 A/dm^(2)、BN添加量为10 g/L、电镀15 min得到的镀层综合性能最优良。随着镀液中BN浓度的增加,所得镀层中BN含量先升高,后下降。当镀液中BN浓度为10 g/L时,能在基体表面沉积最多的BN,且此时的晶粒尺寸较小,对膜层的力学性能提升最为显著。膜层硬度与BN在膜层中的含量呈正相关,但当在镀液中添加的BN含量过高时,BN会产生团聚现象,不仅会让BN的沉积率降低,同时也会让晶粒尺寸增大,使膜层的力学性能下降。此外,通过对试样进行600℃退火热处理,可对镀层的硬度、耐磨性等性能的提升起到极大的促进作用。
Ni-Mo-BN composite layers with different BN contents were prepared on the surface of copper substrate by direct current electrodeposition.The effect of BN powder at different concentrations(5 g/L,10 g/L,15 g/L,20 g/L)in the plating solution and the influence of BN on the microstructure and hardness of the film layer after annealing heat treatment were investigated.The results show that the best overall performance is obtained with a current density of 2 A/dm^(2)and a BN addition of 10 g/L for 15 min.As the BN powder content in the plating solution increases,the BN content in the plated layer firstly increases and then decreases.When BN powder is added at 10 g/L,the most BN can be deposited on the surface of the substrate,and the grain size is smaller at this time,which can improve the performance of the film layer significantly.The film hardness is positively correlated with the amount of BN in the film layer.However,when the BN content added to the plating solution is too high,BN produces agglomeration phenomenon,which not only makes the BN deposition rate lower,but also makes the grain size increase,which makes the mechanical properties of the film layer decrease.In addition,by subjecting the specimen to a 600℃annealing heat treatment,the mechanical properties such as hardness and wear resistance of the plated layer can be greatly enhanced.
作者
夏晓健
万芯瑗
严康骅
陈云翔
韩纪层
洪毅成
林德源
XIAXiaojian;WANXinyuan;YANKanghua;CHENYunxiang;HANJiceng;HONGYicheng;LINDeyuan(State Grid Fujian Electric Power Co.,Ltd.,Electric Power Research Institute,Fuzhou 350007,China)
出处
《热加工工艺》
北大核心
2024年第14期21-26,共6页
Hot Working Technology
基金
国网福建省电力有限公司科技项目(521304210004)。
关键词
电沉积
Ni-Mo-BN
退火处理
硬度
耐磨性
electrode position
Ni-Mo-BN
annealing treatment
hardness
wear resistance
