模拟油田工况条件下低Cr钢抗H_2S应力腐蚀开裂行为研究  

H_2S Stress Corrosion Cracking of Low Cr Steels in Simulated Oilfield Environment

作　　者：吕祥鸿[1] 赵国仙[1] 张建兵[2] 韩勇[3] 常泽亮[4] 

机构地区：[1]西安石油大学材料科学与工程学院,西安710065 [2]西安石油大学机械工程学院,西安710065 [3]西安摩尔石油工程实验室,西安710065 [4]塔里木油田分公司勘探开发研究院,库尔勒841000

出　　处：《腐蚀科学与防护技术》2010年第1期32-35,共4页Corrosion Science and Protection Technology

基　　金：国家自然科学基金项目(50704026);西安石油大学科技基金研究项目(YS29030407)

摘　　要：运用四点弯曲试验方法,参照NACE 0177-2005标准研究了低Cr钢在模拟塔里木油田工况条件下的抗H2S应力腐蚀开裂(SSC)行为.结果表明:经720小时试验后,0.5 Cr试样表面未发现宏观及微观裂纹,表现出良好的抗SSC能力,而普通3 Cr、5 Cr试样表面均发现宏观及微观裂纹,没有通过抗SSC性能检测;应从成分设计及适当的热处理等方面着手,获得理想的显微组织,来提高3 Cr、5 Cr钢的抗SSC性能.Conferring to NACE TM0177-2005 standard, H2S stress corrosion cracking （SSC） behavior of low Cr steels in the simulated environments of Tarim oilfield was studied with four-point bent test. The results show that no macroscopic and microscopic surface cracks are observed on steel specimens with 0. 5 Cr after 720-hour test duration,which presents that the steel with 0. 5 Cr has favorable SSC resistance. While to the common steels with 3 Cr and 5 Cr, there exist obviously macroscopic and microscopic cracks on the specimen surfaces, and 3 Cr and 5 Cr steels possess an inferior SSC resistance. In order to enhance the resistance to SSC of the steels with 3 Cr and 5 Cr, heat treatment and compositional design should be done to obtain the ideal microstructure.

关 键 词：低Cr钢 四点弯曲试验 H2S应力腐蚀开裂(SSC) 成分设计 

分 类 号：TG172.8[金属学及工艺—金属表面处理]