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在模拟加氢反应器工况条件下,研究氢对加氢反应器器壁材料2(1/4)Cr-1Mo钢的力学性能的影响。采用低周疲劳实验计算原始状态和渗氢试样的裂纹扩展速率da/dN及门槛值△J_(th);并测试裂纹尖端附近的氢分布。结果表明,氢含量与应力场有关,应力越大氢含量就越高。假设在反应器壁内存在表面裂纹的情况下,估算了加氢反应器的剩余寿命。
The effect of hydrogen on the mechanical properties of 2 (1/4) Cr-1Mo steel for hydrogenation reactor wall material was studied under the condition of simulated hydrogenation reactor. The low-cycle fatigue test was used to calculate the crack propagation rate da / dN and the threshold value △ J_ (th) of the initial state and hydrogen permeation test specimens; and the hydrogen distribution near the crack tip was tested. The results show that the hydrogen content is related to the stress field, and the higher the stress, the higher the hydrogen content. Assuming the presence of surface cracks in the reactor wall, the remaining life of the hydrogenation reactor is estimated.