根据溶质晶界偏聚理论和原子扩散原理研究了2.25Cr 1Mo钢服役12年后磷晶界偏聚行为及脱脆处理工艺.采用俄歇电子能谱实验对溶质原子的晶界偏聚程度进行了测试分析.结果表明:对于已脆化的2.25Cr 1Mo钢,存在临界脆化温度,且脆化程度越高,临界脆化温度越低;高于临界脆化温度数小时的保温即可消除脆化现象,即2.25Cr 1Mo钢的脱脆速率远大于脆化速率.
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