显微组织对管线钢硫化物应力腐蚀开裂的影响  

EFFECT OF MICROSTRUCTURE ON SULFIDE STRESS CORROSION CRACKING OF PIPELINE STEELS

作　　者：赵明纯[1] 单以银[1] 李玉海[1,2] 杨柯[1] 

机构地区：[1]中国科学院金属研究所 [2]沈阳工业学院材料科学与工程分院,沈阳110016

出　　处：《金属学报》2001年第10期1087-1092,共6页Acta Metallurgica Sinica

基　　金：国家973重大基础研究项目 G1998061511

摘　　要：研究了不同显微组织管线钢的抗硫化物应力腐蚀开裂（ＳＳＣＣ）行为．结果表明，细小针状铁素体为主的显微组织抗ＳＳＣＣ性能最佳，超细铁素体的显微组织次之，（铁素体＋珠光体）的显微组织最差．分析表明，氢脆是高强度管线钢在ＳＳＣＣ中的主要破坏形式；针状铁素体为主的显微组织，其内部的高密度缠结位错和弥散析出的碳氮化物起到了强烈的氢陷阱作用，表现出最佳的抗ＳＳＣＣ性能.Study on sulfide stress corrosion cracking (SSCC) of pipeline steels with different microstructures was carried out. The results show that the microstructure dominated by fine acicular ferrite has the best resistant ability to SSCC, the microstructure of ultrafine ferrite is in the second position, and the microstructure mixed by ferrite and pearlite is relatively worse. It is analyzed that hydrogen embrittlement is the main failure mechanism for high strength pipeline steels in SSCC, and both the high density tangled dislocation and the fine carbonitride in acicular ferrite play a strong role of hydrogen traps, which result in a better resistance to SSCC.

关 键 词：管线钢 显微组织 氢陷阱 硫化物 应力腐蚀开裂 

分 类 号：TE988.2[石油与天然气工程—石油机械设备] TG172.9[金属学及工艺—金属表面处理]