摘要
应用悬臂梁往复弯曲腐蚀疲劳试验机对石油、电站等行业常用的高强钢25Cr2Ni4MoV在空气和盐酸介质中的腐蚀疲劳行为进行了研究,探讨了循环应力和盐酸浓度对腐蚀疲劳的影响。结果表明,25Cr2Ni4MoV钢在盐酸介质中存在腐蚀疲劳现象,且循环应力越大,盐酸浓度越高,其腐蚀疲劳寿命越低,应力对其寿命的影响较盐酸浓度的影响更显著;在一定浓度范围内,盐酸浓度变化对寿命影响较小。断口形貌表明,其裂纹扩展方式为沿晶扩展。
By using a cantilever beam reversed bending and corrosion fatigue testing machine,the corrosion fatigue behavior of 25Cr2Ni4MoV steel in hydrochloric acid was investigated.The results showed that corrosion fatigue life decreased with the increasing cyclic stress and also the increasing concentration of hydrochloric.Besides,corrosion fatigue life is more vulnerable to magnitude of the cyclic stress than the concentration of the hydrochloric;the concentration of hydrochloric acid had less impact on the life within a certain concentration range.The failured samples were analyzed by using optical microscope（OM） and scanning electron microscope（SEM）.The morphology showed that the fracture mechanism was intergranular cracking.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2013年第4期276-280,共5页
Corrosion Science and Protection Technology
基金
国家科技重大专项项目(2011ZX05048)资助
