低碳-低锰系油井套管用钢抗硫化氢应力腐蚀开裂性能  

Hydrogen Sulfide Resistant Stress Corrosion Cracking of Low C-Mn Steels for Oil Well Casing

作　　者：贺飞[1] 尚成嘉[1] 张峰[2] 毕宗岳[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]宝鸡石油钢管有限责任公司,陕西宝鸡721008

出　　处：《钢铁》2013年第3期76-81,共6页Iron and Steel

摘　　要：对621MPa(90ksi)级抗硫化氢腐蚀油井套管用钢的合金设计、热处理工艺以及组织和性能关系进行了研究,分别设计了0.08C-0.8Mn和0.20C-0.8Mn 2种低碳-低锰试验钢,并重点研究了经调质处理后试验钢的位错、析出物和碳化物对SSCC性能的影响。研究结果表明,采用低碳-低锰,结合Nb、V、Ti和B的微合金设计,通过适当的调质热处理工艺可以获得优良的力学性能、韧性和抗硫化氢应力腐蚀开裂性能,满足相关标准的要求。研究结果还表明,不共平面的位错群、细小的析出物以及弥散的高球化率碳化物,可以使钢具有很好的抗硫化氢应力腐蚀开裂性能。Alloy design, heat treatment process and micro structure and properties relationship of 621MPa（90ksi） grade oil well casing steels of H2S resistant corrosion were studied. Such two kinds as 0.08C-0.8Mn and 0.20C- 0.8Mn of low C-Mn tested steels were designed, respectively. And the effect of dislocation, precipitation and carbide of tested steels after heat treatment on SSCC performance was investigated. The results show that the low C- Mn and Nb-V-Ti-B micro-alloy design has excellent mechanical properties, toughness and resistance to H2S stress corrosion cracking performance through proper quenching and tempering heat treatment process, to meet the re- quirements of the relevant standards. The results also show that the un-coplanar dislocation group, fine precipitates and dispersive high sphericity carbide would be beneficial to excellent hydrogen sulfide stress corrosion cracking resistance.

关 键 词：低碳-低锰合金设计 抗硫化氢腐蚀油井套管用钢 应力腐蚀开裂 

分 类 号：TG142.15[一般工业技术—材料科学与工程] TG172.9[金属学及工艺—金属材料]