X80管线钢相变点测定与分析研究  

Measurement and Analysis of Phase Transformation Temperature of X80 Pipeline Steel

作　　者：王道远[1] 刘春明[1] 黄贞益[2] 王伟[2] 

机构地区：[1]东北大学材料与冶金学院,辽宁沈阳110004 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《物理测试》2011年第4期27-31,共5页Physics Examination and Testing

基　　金：江苏省科技成果转化专项资金资助项目(BA2006015)

摘　　要：利用Gleeble-3800热模拟试验机对X80管线钢再结晶终止温度Tnr和CCT曲线进行测定分析,并利用差热分析试验方法确定试验钢的相变温度范围。结果表明:X80管线钢的再结晶终止温度为1 065℃,AC1和AC3分别为749℃和863℃,而钢中析出物大量溶解的温度在1 050℃,贝氏体相变温度为483℃;从测得的CCT曲线可以看出,针状铁素体形成的冷却速度范围较宽,从10～40℃/s冷却速度区间均可获得以针状铁素体为主的组织。上述结论为X80管线钢控轧控冷工艺制定提供依据。In this paper,recrystallization terminal temperature Tnr and CCT curves of X80 pipeline steel were measured and analyzed by Gleeble-3800 thermal simulation testing machine,and the range of the phase transition temperature was determined with differential thermal analysis method.The results showed that： the recrystallization terminal temperature is 1 065 ℃,Ac1 and Ac3 are 749 ℃ and 863 ℃,a large number of precipitates dissolve when the temperature is 1 050 ℃,bainitic transformation temperature is 483 ℃,it can be seen that from measured CCT curve：the cooling rate range of formation acicular ferrite is wide.The microstructure is acicular ferrite when the cooling rate is 10-40 ℃/s.The conclusions provide the basis to controlled rolling and controlled cooling of X80 pipeline steel.

关 键 词：管线钢 X80 相变点 差热分析 

分 类 号：TG142.15[一般工业技术—材料科学与工程]