电铸镍工艺参数对铸镍层组织和性能的影响  

Effect of Technology Parameters on Microstructure and Properties of Electroforming Nickel Layer

作　　者：钱建刚[1] 李海婷[1] 李彭瑞[1] 

机构地区：[1]北京航空航天大学,北京100191

出　　处：《稀有金属材料与工程》2015年第7期1758-1762,共5页Rare Metal Materials and Engineering

基　　金：航空科学基金(2012ZE51058)

摘　　要：利用净化的氨基磺酸盐溶液体系,分别采用金相显微镜、阴极弯曲法和拉伸试验的方法研究了阴极电流密度、溶液温度和p H值等工艺参数对电铸镍层的组织形貌、内应力和力学性能(抗拉强度、延伸率)的影响。结果表明:电铸镍的工艺参数影响铸镍层的组织结构,进而影响到铸镍层的性能;铸镍层的晶粒随阴极电流密度的降低和溶液温度的升高而细化,同时当溶液p H值为4.0时,也可以获得较细的晶粒;随着晶粒的细化,铸镍层的内应力降低,抗拉强度升高而延伸率降低;通过优化工艺参数,获得了抗拉强度为673 MPa、延伸率为23.2%和内应力为48 MPa的综合性能优异的铸镍层。Electroforming nickel was prepared from a purified sulfamate system.The effects of cathode-current density, temperature and pH of the solution on the microstructure, internal stress and mechanical properties（tensile strength and elongation） of electroforming nickel layer were investigated by metallographic microscope, cathode bending method and tensile test.The results show that the properties of electroforming nickel layer are influenced by microstructure, while the microstructure is influenced by electroforming parameters; the grain size of electroforming nickel decreases with the decrease of cathode-current density or the increase of temperature; when the pH is 4.0, the grain diminishes too; with the decrease of the grain size, the tensile strength of electroforming nickel layer increases while internal stress and elongation decrease.By optimizing technology parameters, the electroforming nickel layer with excellent properties are prepared, including the tensile strength of 673 MPa, elongation of 23.2% and internal stress of 48 MPa.

关 键 词：电铸镍 组织形貌 内应力 抗拉强度 延伸率 

分 类 号：TQ153.43[化学工程—电化学工业]