This study evaluates the hydrogen absorption and trapping in carbide containing steels from a very low hydrogen partial pressure atmosphere at elevated temperatures. Two generic titanium-containing Fe–C steels, differing in carbon and titanium content, are studied. The steels are subjected to a quench and temper treatment, where tempering is performed in a dilute hydrogen gas atmosphere. Detailed microstructural analysis via SEM and TEM together with characterization via thermal desorption spectroscopy and hot extraction are performed to analyze the hydrogen trapping ability of the different types of carbides.

A significant amount of hydrogen is introduced in the Fe–C–Ti alloys during tempering. Moreover, the hydrogen appears to be strongly trapped. This could be related to trapping at the carbon-vacancies inside the TiC, and more specifically the large undissolved carbides. The binding energy is estimated to range between 80 kJ/mol and 90 kJ/mol and appears to be independent of the undissolved carbide size.

本研究评估了高温下极低氢分压气氛中含碳化物钢的氢吸收和捕获情况。研究了碳和钛含量不同的两种通用含钛 Fe-C 钢。钢材经过淬火和回火处理，其中回火是在稀释的氢气气氛中进行的。通过 SEM 和 TEM 进行详细的微观结构分析，并通过热解吸光谱和热萃取进行表征，以分析不同类型碳化物的氢捕获能力。

在回火过程中，Fe-C-Ti 合金中引入了大量的氢。此外，氢似乎被强烈捕获。这可能与捕获 TiC 内部的碳空位有关，更具体地说是与大的未溶解碳化物有关。结合能估计在 80 kJ/mol 和 90 kJ/mol 之间，似乎与未溶解的碳化物尺寸无关。