镍在低碳钢表面的扩散机理与规律  

Diffusion mechanism and rules of nickel on surface of low carbon steel

作　　者：张士宪 徐鸣悦 赵晓萍 李运刚 Zhang Shixian;Xu Mingyue;Zhao Xiaoping;Li Yungang(Hebei Vocational University of Industry and Technology,Shijiazhuang Hebei 050091,China;Tangshan Iron Steel Group Co.,Ltd.,Tangshan Hebei 063000,China;School of Metallurgy and Energy,North China University of Science and Technology,Tangshan Hebei 063009,China)

机构地区：[1]河北工业职业技术大学,河北石家庄050091 [2]唐山钢铁集团有限责任公司,河北唐山063000 [3]华北理工大学冶金与能源学院,河北唐山063009

出　　处：《金属热处理》2023年第5期121-128,共8页Heat Treatment of Metals

基　　金：国家自然科学基金(51974129);河北省“三三三人才工程”项目(A202101030);河北工业职业技术大学博士基金(bz202301)。

摘　　要：采用水溶液电沉积+高温固态扩散法成功制备了镍/低碳钢表面复合材料,研究了镍在低碳钢表面的扩散机理,利用Den Broeder法得到了不同温度下镍在低碳钢中的扩散规律。结果表明,高温固态扩散退火处理实现了镍沉积层与低碳钢的冶金结合,镍原子主要沿低碳钢晶界进行扩散,其扩散抑制了晶粒的长大。碳、硅、锰、硫、磷原子对镍原子的扩散影响较小。镍原子在低碳钢表面的固态扩散规律为D_(Ni)=-3.53×10^(-21)T^(4)+1.75×10^(-17)T^(3)-3.22×10^(-14)T^(2)+2.60×10^(-11)T-7.81×10^(-9)。在973~1373 K温度区间固态扩散时,随着温度的升高,镍原子的平均互扩散系数呈现先上升后下降再上升的趋势;晶体结构对于镍原子的扩散影响较大,镍原子在体心立方晶体结构中的扩散速度明显大于在面心立方晶体结构中的扩散速度。Nickel/low carbon steel surface composites were successfully prepared by means of aqueous solution electrodeposition+high temperature solid diffusion method.The diffusion mechanism of nickel on the surface of low carbon steel was studied.The diffusion rules of nickel on the surface of low carbon steel at different temperatures were obtained by using Den Broeder method.The results show that high temperature solid diffusion annealing realizes the metallurgical combination of nickel deposit layer and low carbon steel.Nickel atoms mainly diffuse along the grain boundary of low carbon steel,and its diffusion inhibits the growth of grains.Carbon,silicon,manganese,sulfur and phosphorus atoms have little influence on the diffusion of nickel atoms.The solid state diffusion rule of nickel atom on surface of the low carbon steel is D_(Ni)=-3.53×10^(-21)T^(4)+1.75×10^(-17)T^(3)-3.22×10^(-14)T^(2)+2.60×10^(-11)T-7.81×10^(-9).During solid state diffusion at 973-1373 K,the average interdiffusion coefficient of nickel atoms increases first,then decreases and then increases with the increase of temperature.The crystal structure has a great influence on the diffusion of nickel atoms,and the diffusion speed of nickel atoms in the body centered cubic crystal structure is obviously higher than that in the face centered cubic crystal structure.

关 键 词：镍/低碳钢表面复合材料 互扩散系数 扩散机理 扩散规律 

分 类 号：TB331[一般工业技术—材料科学与工程]