高强度抗CO2腐蚀管线钢实验研究

摘要

The CO2 corrosion resistance of pipeline steels could be enhanced by Cr proper addition and controlling the rolling procedure and the cooling temperature after finish rolling. The effects of the alloying component and rolling procedure parameters on mechanical properties and corrosion resistance were investigated for the pipeline steels. The results show that 0.55 ％ (mass fraction)Cr addition, increasing the quantity of the cumulative billet rolling deformation on uncrystallized austenite phase and followed by cooling by 23℃/s, the steel can have the yield strength above 530MPa with a better CO2 corrosion resistance.%在一定的轧制制度和轧后控冷速率下,通过添加适量的Cr能提高管线钢的抗CO2腐蚀能力,本工作重点研究了合金成分和轧制工艺参数对管线钢力学性能和耐腐蚀性的影响.结果表明:加入0.55%(质量分数)Cr,适当加大奥氏体未结晶区轧制时钢坯的累积变形量,并以23℃/s的冷却速率层流水冷,可得到屈服强度530MPa以上,抗CO2腐蚀性能较好的管线钢.