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.
参考文献
| [1] | 赵明纯,肖福仁,单以银,李玉海,杨柯.超低碳针状铁素体管线钢的显微特征及强韧性行为[J].金属学报,2002(03):283-287. |
| [2] | Endo S.Advanced in High-Performance Linepipe With Re-spect to Strength and Deformability[A].UK:Scientific Surveys Ltd,2002:27. |
| [3] | 文建华,刘清友,孙新军,阴树标,项金钟.冷却速率对高铌微合金钢组织的影响[J].钢铁研究学报,2007(12):35-39,48. |
| [4] | 孔君华 .高钢级X80管线钢工艺、组织与性能的研究[D].华中科技大学,2005. |
| [5] | 刘永铨.钢的热处理[M].北京:冶金工业出版社,1981 |
| [6] | 王世华;杨红征.差热分析DTA技术及其应用指导[M].北京:北京师范大学出版社,1981 |
| [7] | 吕广庶;张远明.工程材料及成型技术基础[M].北京:高等教育出版社,2001 |
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