摘要
应用扫描电镜（SEM）、拉伸试验、萃取复型和EBSD技术对实验室研制的X100管线钢在300、350和400℃卷取温度下的组织、力学性能、析出物状态和大小角度晶界进行了分析。结果表明：随着卷取温度的升高，X100管线钢强度降低，伸长率和冲击韧性上升，显微组织为针状铁素体（AF）、粒状贝氏体（GB）、板条贝氏体（LB）组织，M／A岛减少，析出物由铌、钛的碳、氮化物组成。结合轧后钢板的显微组织、力学性能分析，在300～350~C卷取试验钢的显微组织和力学性能可以达到X100级别管线钢的水平。
Microstructure, mechanical properties, precipitation size and grain boundaries angles in laboratory developed X100 pipeline steel coiling at 300 ℃ .350 ℃ .400 ℃ were studied by means of scanning electron microscope （SEM） , tensile test, complex and EBSD. Results show that with the coiling temperature increasing, the strength of the steel decreases, elongation and toughness increase. Microstructure of the steel mainly consists of acicular ferrite （ AF）, granular bainite （ GB）, lath bainite （LB） and M/A islands. Precipitates mainly consist of Nb/Ti（C,N）. Based on the microstrueture of rolled plates, mechanical properties, the microstructure and mechanical properties of tested steel coiling at 300 - 350 ℃ can reach X100 pipeline steel＇ s level.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第1期140-145,共6页
Transactions of Materials and Heat Treatment
关键词
X100管线钢
卷取温度
析出物
X100 pipeline steel
coiling temperature
precipitate
