2.25Cr-1Mo钢氢致开裂行为及回火脆对抗氢致开裂性能的影响  

HYDROGEN-INDUCED CRACKING(HIC) AND EFFECTS OF TEMPER EMBRITTLEMENT ON HIC RESISTANCE OF 2.25Cr-1Mo STEEL

作　　者：温吉利[1] 华丽[1] 徐宏[1] 王志文[1] 王正东[1] 

机构地区：[1]华东理工大学,上海200237

出　　处：《腐蚀科学与防护技术》2008年第5期317-320,共4页Corrosion Science and Protection Technology

摘　　要：采用电解充氢方法分别对回火脆态和脱脆态2.25Cr-1 Mo钢氢致开裂行为进行实验研究,通过甘油测氢法测定了2.25Cr-1 Mo钢发生裂纹扩展时钢中扩散的平均氢浓度.为进一步了解回火脆对抗氢致开裂性能的影响,利用有限元软件分别对氢在回火脆态与脱脆态2.25 Cr-1 Mo钢中的扩散过程进行模拟分析,系统研究了在应力-氢环境交互作用下裂纹尖端周围的氢扩散规律,并给出了裂纹扩展时裂尖局部位置的氢浓度大小.A technique of electrochemical hydrogen charging is adopted to study the behavior of hydrogeninduced cracking of 2.25Cr-1Mo steel. The average hydrogen concentration in 2. 25Cr-1 Mo steel was determined for the occurence of hydrogen-induced cracking（HIC）. In order to investigate the effects of temper embrittlement on HIC resistance,a finite element analysis was adopted to simulate the hydrogen diffusion regularity near the crack tip under the interaction between stress and hydrogen environment. The range of hydrogen concentration at the crack tip was estimated for the initiation of crack growth.

关 键 词：电解充氢 回火脆 2.25Cr-1 Mo钢 裂纹尖端 有限元分析 裂纹扩展 

分 类 号：TG172.83[金属学及工艺—金属表面处理]