16Mn钢的氢渗透(Ⅱ)——表观氢扩散系数积分微分算法的验证及氢渗透对氢脆敏感性的影响

HYDROGEN PERMEATION OF 16Mn STEEL (Ⅱ) THE VERIFICATION OF THE INTEGRAL AND DIFFERENTIAL ALGORITHM OF APPARENT HYDROGEN DIFFUSION COEFFICIENT AND THE EFFECT OF HYDROGEN PERMEATION ON SUSCEPTIBILITY OF HYDROGEN EMBRITTLEMENT

用电化学方法研究16Mn钢的氢渗透行为。结果表明,表观氢扩散系数的积分微分算法简便易行,适用范围广;塑性变形既能捕获氢,又可将捕获的氢释放,但使表观氢扩散系数减小;正火加回火态16Mn钢的抗氢脆性能的改善与其氢扩散活化能的降低,表观氢扩散系数的增大相对应。

The behaviour of hydrogen permeation of 16Mn steel was studied by means of electrochemical method. The results showed that the integral and differential algorithm of the apparent hydrogen diffusion coefficient is simple and direct and can be used over a wide range.Plastic deformation can capture and release hydrogen, but results in the reduction of apparent hydrogen diffusion coefficient. The improvement of the resistance of 16Mn steel with heat treatment against hydrogen embrittlement corresponds to the decrease of the activation energy of hydrogen diffusion and the increase of the apparent hydrogen diffusion coefficient.