通过步冷处理对2.25Cr1Mo钢进行了回火脆化,通过电化学方法对回火脆化试样进行了充氢。测定了三种状态下,即原始状态、回火脆化状态及回火/充氢状态材料的韧脆转变温度。结果表明,回火/充氢状态的2.25Cr1Mo母材和焊缝韧脆转变温度最高,回火状态次之,原始状态最低。 Through step cooling treatment, 2.25Cr1Mo steel was tempered and embrittled, and temper embrittlement samples were hydrogenated by electrochemical method. The ductile-brittle transition temperature of the materials in three states, that is, the original state, the temper embrittlement state and the tempered / hydrogen-filled state were measured. The results show that the ductile-brittle transition temperatures of the 2.25Cr1Mo base metal and the weld in the tempered / hydrogenated state are the highest, followed by the tempered state, and the original state is the lowest.