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不含钒重轨钢(DB钢)产生氢鼓泡和氢致塑性损失的临界可扩散氢浓度分别为0.7×10~(-4)％和0.09×10~(-4)％:而对含钒的PD_3钢,其相应值为2.2×10~(-4)％及0.26×10(-4)％。钒提高了产生氢损伤的临界氢浓度,从而降低了重轨钢的氢脆敏感性。两种钢的氢致塑性损失I_δ与可扩散氢浓度Co的倒数呈直线关系,即I_δ=100-9/Co(DB钢)及I_δ=105-27/Co(PD3钢)。这表明合金元素钒能降低氢致塑性损失。
The critical diffusible hydrogen concentrations for hydrogen bubbling and hydrogen-induced plastic loss of vanadium-free heavy rail steel (DB steel) were 0.7 × 10 -4% and 0.09 × 10 -4%, respectively. Vanadium PD_3 steel with corresponding values of 2.2 × 10 -4% and 0.26 × 10 -4%. Vanadium increases the critical hydrogen concentration that produces hydrogen damage, thereby reducing the hydrogen embrittlement susceptibility of heavy rail steels. The hydrogen plasticity loss (I_δ) of both steels shows a linear relationship with the reciprocal of diffusible hydrogen concentration Co, which is I_δ = 100-9 / Co (DB steel) and I_δ = 105-27 / Co (PD3 steel). This shows that alloying vanadium can reduce hydrogen plasticity loss.