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研究高强度钢的氢脆问题迫切需要有一种灵敏有效的测氢方法。本研究提出了测定氢在GC-钢中浓度的电化学方法。本部分是测定氢在GC-钢中的扩散系数。山于氢在高强度钢中达不到稳态极限扩散,所以只能用各种非稳态法测其表观扩散系数。本文对比了“两点法”、“斜率法”和“穿透时间法”等三种非稳态计算方法,认为“穿透时间法”简便而重现性好,是较好的一种非稳态方法。用这种方法测定氢在GC-4钢中的表观扩散系数为4.10×10~(-7)cm~2/s。
To study the hydrogen embrittlement problem of high-strength steel urgently needs a sensitive and effective hydrogen measurement method. This study proposed an electrochemical method for the determination of hydrogen concentration in GC-steel. This section is to measure the diffusion coefficient of hydrogen in GC-steel. Mountain Hydrogen in high-strength steel can not reach the limit of steady-state diffusion, it can only use a variety of non-steady-state method to measure the apparent diffusion coefficient. This article compares the three non-steady-state calculation methods of “two-point method”, “slope method” and “penetration time method”, and concludes that “penetration time method” is simple and reproducible, Steady-state method. The apparent diffusion coefficient of hydrogen in GC-4 steel measured by this method is 4.10 × 10 ~ (-7) cm ~ 2 / s.