The influence of adding niobium and vanadium on hydrogen diffusion in 22MnB5 hot stamping steel  

作　　者：Peng-wei Zhou Zhi-yi Yan Ke Wang Tao Liu Si-jia Chen Zhen Ma Ju-sha Ma Wei Ding Yi Luo Bing-gang Liu Wei Li 

机构地区：[1]Shanghai Institute of Space Power-Sources,Shanghai 200245,China [2]State Key Lab of Metal Matrix Composites,School of Materials Science and Engineering,Shanghai Jiao Tong University,Shanghai 200245,China

出　　处：《Journal of Iron and Steel Research International》2023年第10期2031-2042,共12页

基　　金：The authors are grateful to the financial support of the National Key R&D Program of China(No.2021YFB3702401);National Natural Science Foundation of China(U1937601).

摘　　要：Adding alloying elements is always considered as an effective method to enhance the resistance against hydrogen embrittlement in steels.Nb and V were added into 22MnB5 hot stamping steel,and then their influences on hydrogen permeation of 22MnB5 steel suffering from corrosion in 3.5%NaCl aqueous solution were investigated.The results showed that the addition of Nb/V could reduce the hydrogen permeation content due to solution corrosion.Electrochemical techniques including electrochemical impedance spectroscopy and overpotential stepping hydrogen permeation test con-firmed that compared to the original 22MnB5 steel,22MnB5-NbN steel owned a higher corrosion resistance and a higher hydrogen diffusion resistance.Furthermore,it was confirmed that Nb-V-alloyed 22MnB5 steel showed higher resistance against hydrogen embrittlement than the Nb-V-free counterpart,which should be related to the presentence of nanoscaled Nb/V-containing precipitates as the irreversible trapping sites for hydrogen detected by thermal desorption spectroscopy.Finally,the lattice diffusion coefficient of hydrogen DL was determined in steels with and without Nb and V.

关 键 词：Hydrogen permeation CORROSION Hot stamping steel NIOBIUM VANADIUM Thermal desorption spectroscopy 

分 类 号：TG142.1[一般工业技术—材料科学与工程]