孙建波,靳亚鹏,孙冲,蒋涛,程相坤,刘慧枫.H2S-CO2 环境下低铬钢的硫化物应力腐蚀开裂行为[J].表面技术,2016,45(2):1-7.
SUN Jian-bo,JIN Ya-peng,SUN Chong,JIANG Tao,CHENG Xiang-kun,LIU Hui-feng.Sulfide Stress Corrosion Cracking Behavior of Low-Cr Steel in H2S-CO2 Environment[J].Surface Technology,2016,45(2):1-7
H2S-CO2 环境下低铬钢的硫化物应力腐蚀开裂行为
Sulfide Stress Corrosion Cracking Behavior of Low-Cr Steel in H2S-CO2 Environment
投稿时间:2015-10-31  修订日期:2016-02-20
DOI:10.16490/j.cnki.issn.1001-3660.2016.02.001
中文关键词:  低铬钢  H2S-CO2 腐蚀  应力腐蚀开裂  90SS 钢  90SS-3Cr 钢  油气管材
英文关键词:low-Cr steels  H2 S-CO2 corrosion  stress corrosion cracking  90SS steel  90SS-3Cr steel  oil country tubular goods
基金项目:山东省自然科学基金(ZR2010EM034)
作者单位
孙建波 中国石油大学(华东), 山东 青岛 266580 
靳亚鹏 中国石油大学(华东), 山东 青岛 266580 
孙冲 中国石油大学(华东), 山东 青岛 266580 
蒋涛 中国石油大学(华东), 山东 青岛 266580 
程相坤 中国石油大学(华东), 山东 青岛 266580 
刘慧枫 中国石油大学(华东), 山东 青岛 266580 
AuthorInstitution
SUN Jian-bo China University of Petroleum (Huadong), Qingdao 266580, China 
JIN Ya-peng China University of Petroleum (Huadong), Qingdao 266580, China 
SUN Chong China University of Petroleum (Huadong), Qingdao 266580, China 
JIANG Tao China University of Petroleum (Huadong), Qingdao 266580, China 
CHENG Xiang-kun China University of Petroleum (Huadong), Qingdao 266580, China 
LIU Hui-feng China University of Petroleum (Huadong), Qingdao 266580, China 
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中文摘要:
      目的 评价 90SS 和 90SS-3Cr 油管钢在 H2S-CO2 环境下的硫化物应力腐蚀开裂(SSCC)行为,并分析其断裂机理。 方法 利用四点弯曲实验和慢应变速率拉伸实验,结合显微组织分析、扫描电子显微镜分析技术,研究 90SS 和 90SS-3Cr 两种钢材在 H2S-CO2 环境下的应力腐蚀开裂行为和断口形貌特征。结果 90SS-3Cr 钢的显微组织中存在更多的非金属夹杂物。 经过 720 h 四点弯曲实验后,90SS 和 90SS-3Cr 试样表面均未出现宏观及微观裂纹,表现出良好的抗硫化物应力腐蚀开裂能力。 在慢应变速率拉伸实验中,当 H2S 浓度由 0 增加至 6 mol/ L 时,90SS-3Cr 试样的断后伸长率 δ、断面收缩率 φ 及断裂时间 t分别下降了 71. 6% ,69. 6% ,61. 4% ,远高于 90SS 钢的塑性损失(分别下降 2. 9% ,52. 5% ,10. 3% )。 断口形貌分析表明,90SS-3Cr 钢在较低浓度 H2S 时就由塑性断裂向脆性断裂转变。 结论 随着 H2S 浓度的升高,90SS 和 90SS-3Cr 钢的塑性损失增加,抗 SSCC 能力均下降。 相比 90SS 钢,90SS-3Cr 钢对应力腐蚀开裂更为敏感。
英文摘要:
      Objective To evaluate the sulfide stress corrosion cracking (SSCC) behavior of 90SS and 90SS-3Cr tube steels in H2S/ CO2 environment, and determine the fracture mechanism. Methods The SSCC behavior and fracture morphologies of 90SS and 90SS-3Cr tube steels in H2S/ CO2 environment were investigated by using four point bend test (FPB), slow strain rate test (SSRT), microstructure and scanning electron microscope (SEM) analysis. Results For 90SS-3Cr, more non-metallic inclusions appeared in the microscopic structure. After the FPB test for 720 hours, there were neither macroscopic nor microcosmic cracks on the surfaces of 90SS and 90SS-3Cr specimens, which meant that they possessed a favorable SSCC resistance. However, the SSRT tests indicated that as the concentration of H2S increased from 0 mol/ L to 6 mol/ L, the elongation, the reduction of cross section and the fracture time of 90SS-3Cr steel decreased by 71. 6% , 69. 6% and 61. 4% , which were much higher than that of 2. 9% , 52. 5% and 10. 3% of 90SS steel respectively. The fracture morphology analysis showed that the fracture of 90SS-3Cr steel transformed from ductile fracture into brittle fracture at lower H2S concentrations. Conclusion The SSCC resistance of both 90SS and 90SS-3Cr tube steels decreased with the rising of H2S concentration. 90SS-3Cr specimens were more prone to fracture than 90SS steel.
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