论文部分内容阅读
通过实验和有限元计算研究了条状夹杂物对0Cr16Ni5Mo钢中氢扩散过程的影响。结果表明:氢扩散在含条状夹杂物的钢中呈各向异性,当条状夹杂物长度与氢渗透方向平行时,夹杂物中的氢呈梯度分布可以加速氢的扩散,氢在钢中的表观扩散系数会明显增大;当条状夹杂长度与氢渗透方向垂直时,夹杂物发挥对氢的陷落作用而使氢在钢中的表观扩散系数会降低。此外,条状夹杂物的变形延伸量也会影响氢的扩散,在与夹杂物长度平行的方向上,夹杂物的变形量越大,氢表观扩散系数和扩散通量越大。
The effects of strip inclusions on hydrogen diffusion in 0Cr16Ni5Mo steel were studied by means of experiments and finite element calculations. The results show that hydrogen diffusion is anisotropic in steels containing strip inclusions. When the length of strip inclusions is parallel to the direction of hydrogen permeation, the hydrogen distribution in inclusions can accelerate the diffusion of hydrogen. Hydrogen in steel The apparent diffusion coefficient will increase obviously. When the length of the strip inclusions is perpendicular to the direction of hydrogen permeation, the inclusions exert a subsidence effect on hydrogen and the apparent diffusion coefficient of hydrogen in the steel will decrease. In addition, the deformation of strip inclusions also affects the extension of hydrogen diffusion. In the direction parallel to the length of inclusions, the larger the deformation of inclusions, the greater the apparent hydrogen diffusion coefficient and diffusion flux.