摘要
对炉卷轧机生产X80管线钢的控制轧制技术以及X80钢板/卷的显微组织、析出相、力学性能以及制作的直缝焊管与螺旋焊管的力学性能等进行了分析研究。结果表明：炉卷轧机X80管线钢板/卷获得了较高的强度与韧性,其中平均屈服强度与抗拉强度分别达到575 MPa与665 MPa以上,-20℃的冲击功高于330 J,FATT50CVN〈-60℃;管线钢为典型的细小针状铁素体组织,铁素体基体上弥散分布着纳米尺度的Nb、Ti的碳氮化物析出相,析出粒子主要有两种：一种平均尺寸在20 nm左右,是以NbC为主的Nb（Ti）C析出相;另一类粒子尺寸大多在50~200 nm,是以TiN为主的Ti、Nb（NC）复合析出相;利用炉卷轧机X80钢板与钢卷制成的直缝焊管与螺旋焊管具有较高的综合力学性能。
X80 pipeline steel were preduced on steckel mill.The microstructure,precipitates and mechanical properties of the steel and SSAW/ERW piples were investigated.The results showed that the average yield strength and tensile strength of X80 steel can be up to 575MPa and 665MPa,the average impact energy can be up to 330J at-20℃,and the FATT50CVN can be below-60℃.The microstructure of X80 consists mainly of the fine acicular ferrite with dispersed nano-precipitates.Two kinds of precipitates were observed in the steel,the fine ones about 20nm are Nb（Ti）C and the other ones ranging from 50nm to 200nm are mainly Nb and Ti（NC）.A nice match of strength and toughness obtained in SSAW/ERW X80 pipes.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2010年第5期41-45,54,共6页
Journal of Iron and Steel Research
基金
江苏省科技成果转化专项资金项目(BA2006015)
关键词
管线钢
X80
针状铁素体
析出相
控制轧制
pipelinesteel
X80
acicular ferrite
precipitate
controlled rolling/cooling
