氢陷阱对临氢钢氢扩散系数测定的影响  

Effect of hydrogen traps on measurement of diffusion coefficient of hydrogen in steel for exposure to hydrogen environment

作　　者：王洪[1] 赵和明[1] 陈辉[2] 骆晓伟 张鲲[2] 

机构地区：[1]新余钢铁集团有限公司,江西新余338001 [2]西南交通大学四川省先进焊接及表面工程技术研究中心,四川成都610031

出　　处：《材料热处理学报》2016年第4期236-242,共7页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(51201144);中国博士后科学基金(2013M542288)

摘　　要：采用双电解池电化学氢渗透法测试氢在临氢钢中的扩散系数,并通过对比修正前后氢渗透公式的拟合结果,评价临氢钢中的氢陷阱对氢扩散行为的影响。结果表明:氢陷阱会降低氢扩散系数的测量值,并导致不同厚度试样的测量值存在差异。从材料均匀性方面考虑,选取较厚的试样应获得更准确的测试值。Hydrogen diffusion coefficient in the steel for exposure to hydrogen environment was measured by the electrochemical hydrogen permeation method in a double electrolytic cell. By comparing fitting results of hydrogen permeation formula before and after modification,the effect of hydrogen traps on behavior of hydrogen diffusion was evaluated. The results indicate that hydrogen traps can reduce the measured value of diffusion coefficient of hydrogen resulting in different values measured from the steel samples in different thickness.From the viewpoint of the homogeneity of the materials,more accurate measured value of the hydrogen diffusion coefficient can be obtained by using thicker sample.

关 键 词：临氢钢 氢陷阱 氢扩散系数 电化学氢渗透 

分 类 号：TG111.6[金属学及工艺—物理冶金]