摘要
测试了4种不同硫含量(5×10^(-6),17×10^(-6),50×10^(-6),100×10^(-6))及不同显微组织管线钢的力学性能和抗H_2S开裂性能结果表明,高硫含量(100×10^(-6))会导致管线钢中Ⅱ型MnS夹杂物的形成,恶化冲击性能,而对拉伸性能和抗H_2S开裂性能不产生明显影响.针状铁素体组织比(多边形铁素体+珠光体)组织具有更好的强韧性,但两种组织的抗H_2S开裂性能相反,分析认为这与针状铁素体中大量可动位错对氢的携带和聚集有关.
Mechanical properties and sulfide stress cracking （SSC） resistances of four pipeline steels with sulfur contents of 5×10^-6, 17×10^-6, 50×10^-6 and 100×10^-6 and different microstructures were investigated. The results showed that the high sulfur content of 100 ×10^-6 led to the formation of II type MnS inclusions and worsened the fracture toughness, but has no obvious effect on tensile property and SSC resistance. The steel with acicular ferrite （AF） microstructure exhibited better strength and toughness than that with polygonal ferrite （PF） plus pearlite （P）, but their SSC resistant abilities were opposite, which is related to large amount of mobile dislocations in the AF, these dislocations can carry hydrogen atoms and resulted in the hydrogen accumulation.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2008年第2期215-221,共7页
Acta Metallurgica Sinica
基金
国家自然科学基金项目50471106
辽宁省科技攻关项目2005221002资助~~
