微合金化洁净车轮钢产生氢鼓泡的临界可扩散氢浓度

he critical diffusible hydrogen concentration for hydrogen blistering of a micro-alloyed clean wheel steel was measured using the electrolytic hydrogen charging method. The results show that show that the diffusible hydrogen concentration and the density of hydrogen blisters on the sample surfaces increase with the increasing of the hydrogen charging current density. The lowest diffusible hydrogen concentration for blistering is C0 = 2.22×10^-6. Setting the density of hydrogen blister 0.5 ≤ρ≤3 个/cm^2 for the critical conditions, the critical diffusible hydrogen concentration for producing the hydrogen blistering is C0*=3.64± 0.55×10^-6.