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本工作采用超高真空气相渗透-动态监测技术,研究了氢在21-6-9奥氏体不锈钢中的渗透。结果指出:在230～430℃范围内,氢渗透率、扩散系数和溶解度常数与温度的关系遵循Arrhenius方程;试样两面电镀钯,可以防止表面氧化作用对氢渗透的影响,稳态渗透速度与充氢压力的平方根成正比;试样的冷加工和热处理状态对材料的氢渗透行为没有影响。
In this work, ultra-high vacuum vapor-liquid dynamic monitoring technology was used to study hydrogen infiltration in 21-6-9 austenitic stainless steel. The results show that the relationship between hydrogen permeability, diffusion coefficient and solubility constant and temperature follows the Arrhenius equation in the range of 230-430 ℃. Plating palladium on both sides of the sample can prevent the effect of surface oxidation on hydrogen permeation. The steady-state permeation rate and The square root of the hydrogen pressure is proportional to the sample cold working and heat treatment of the material has no effect on the hydrogen permeation behavior.