熔盐电解扩散制备铬不锈钢/碳钢梯度材料的研究  

Study on chromium stainless steel/carbon steel gradient material prepared by molten salt electrolysis diffusion

作　　者：李孟星 张士宪 李慧蓉[1] 马涛 李欣 张宏博 王丛 李运刚 LI Mengxing;ZHANG Shixian;LI Huirong;MA Tao;LI Xin;ZHANG Hongbo;WANG Cong;LI Yungang(College of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, China;Hebei College of Industry and Technology, Shijiazhuang 050091,China)

机构地区：[1]华北理工大学冶金与能源学院,河北唐山063009 [2]河北工业职业技术学院,石家庄050091

出　　处：《功能材料》2019年第1期1086-1090,1097,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51474088);河北省自然科学基金资助项目(E2017209239);华北理工大学研究生创新项目资助项目(2018S02)

摘　　要：通过熔盐电解扩散方法研究电流波形、电流密度对NaCl-KCl-NaF-Cr_2O_3熔盐体系制备铬不锈钢/碳钢梯度材料工艺的影响,并利用SEM和EDS分析试样的表面形貌以及成分,辉光放电光谱仪分析镀层中各个元素的含量沿碳钢板深度的变化情况。结果表明,熔盐电解扩散法在铬板为阳极,碳钢板为阴极,x(NaCl)∶x(KCl)∶x(NaF)=2∶2∶1,t=60min,T=700℃的实验条件下,最佳的工艺条件为电流密度分别为200mA/cm2,电流波形为双向脉冲,脉冲周期为1 000ms,i正/i反=6∶1,t正/t反=3∶1。The influence of current waveform and current density on the preparation of chromium stainless steel/carbon steel gradient materials by NaCl-KCl-NaF-Cr2O3 molten salt system was studied by the electrolytic diffusion method of molten salt. The surface morphology and composition of the samples were analyzed by SEM and EDS. The changes of the content of each element in the coating were analyzed by the glow discharge spectrometer. The results show that the best process conditions for the electrolytic diffusion of molten salt under the experiment conditions of chromium plate as anode, carbon steel plate as cathode, x(NaCl)∶ x(KCl)∶ x(NaF)=2∶2∶1, t =60 min and T =700 ℃ were 200 mA/cm^2, current waveform was bidirectional pulse, pulse period was 1000 ms, i正/i反=6∶1 and t 正/t反=3∶1.

关 键 词：电流波形 电流密度 NaCl-KCl-NaF-Cr2O3 

分 类 号：TF841[冶金工程—有色金属冶金]