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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
管线钢
显微组织
氢陷阱
硫化物
应力腐蚀开裂
pipeline steel
microstructure
hydrogen trap
sulfide
stress corrosion cracking
