P110钢和13Cr不锈钢的腐蚀疲劳裂纹扩展研究
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摘要
油井管在服役工况下,会受到交变载荷和腐蚀环境的交互作用,引发腐蚀疲劳现象,严重时油井管会发生断裂,从而对油田造成的重大的经济损失。以油田开采中常见的P110钢和13Cr不锈钢为研究对象,腐蚀介质为模拟环境工况,在200KN微机控制电液伺服疲劳实验机(PLD-200KN)上进行标准CT试样的腐蚀疲劳实验。分别探究了频率(1Hz和5Hz)和介质(pH=3和pH=7)对P110钢和13Cr不锈钢腐蚀疲劳裂纹扩展速率的影响,以及不同材料之间的腐蚀疲劳性能的差别。
Under the service condition, the oil well pipe is interacted by alternating load and corrosive environment, causing corrosion fatigue and breaking the oil well pipe in serious time, thus cause great economic loss to the oil field. P110 steel and 13Cr stainless steel are used as the research object, corrosion medium is the simulated environment. The corrosion fatigue test of standard CT sample was carried out on the 200 KN microcomputer controlled electro-hydraulic servo fatigue test machine(PLD-200 KN). The effects of frequency(1 Hz and 5 Hz) and medium(pH=3 and pH=7) on the corrosion fatigue crack propagation rate of P110 steel and 13Cr stainless steel and the difference of corrosion fatigue performance between different materials were researched.
Under the service condition, the oil well pipe is interacted by alternating load and corrosive environment, causing corrosion fatigue and breaking the oil well pipe in serious time, thus cause great economic loss to the oil field. P110 steel and 13Cr stainless steel are used as the research object, corrosion medium is the simulated environment. The corrosion fatigue test of standard CT sample was carried out on the 200 KN microcomputer controlled electro-hydraulic servo fatigue test machine(PLD-200 KN). The effects of frequency(1 Hz and 5 Hz) and medium(pH=3 and pH=7) on the corrosion fatigue crack propagation rate of P110 steel and 13Cr stainless steel and the difference of corrosion fatigue performance between different materials were researched.
引文
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[5]李臻.一种带可靠性的疲劳裂纹扩展速率表达式[J].西安石油学院学报:自然科学版,2004,18(6):67-70.
[6]李文华,夏风,赵少林等.25Cr2Ni4MoV钢在盐酸介质下的腐蚀疲劳行为研究[J].腐蚀科学与防护技术,2013,18(4):276-280.
[7]刘彦国,马进,孙先明.低合金钢在不同条件下的疲劳行为[J].力学与实践,2010,06:49-53.