热变形参数对0.05C-0.13Nb钢相变组织影响  

Effect of Hot Deformation Parameters on Phase Transformation Structure of 0.05C-0.13Nb Steel

作　　者：阴树标[1] 刘清友[2] 张志波[2] 孙新军[2] 雷霆[1] 

机构地区：[1]昆明理工大学材料与冶金工程学院,昆明630091 [2]钢铁研究总院结构材料研究所,北京100081

出　　处：《特殊钢》2007年第6期16-17,共2页Special Steel

基　　金：973国家重点基础研究基金(2004cb619101)

摘　　要：利用Thermecomastor-Z热模拟试验机,研究了含铌0.13%微合金低碳钢奥氏体未再结晶区(超过50%、发生再结晶)变形、并以0.1～50℃/s的冷却速度连续冷却过程的相变。研究了热变形参数对相变组织的影响。结果表明,在未再结晶区变形,在连续冷却条件下,冷却速度≥5℃/s时,90%以上组织为粒状贝氏体;在相同变形温度情况下,随着变形量的增加,先共析铁素体的量增加,贝氏体的量随之减少。Phase transformation of 0. 13Nb microalloying low carbon steel with deformation in non-crystallization temperature zone （ as deformation ≥50%, crystallization occurred） and continuous cooling with cooling rate 0. 1 -50 ℃/s has been studied by using th.ermecmastor-Z thermal simulation test machine and the effect of thermal deformation parameters on phase transformation structure was analyzed. Results indicated that with deformation in non-crystallization temperature zone, in continuous cooling with cooling rate larger than 5 ℃/s, more than 90% of structure was granular bainite, and at same deformation temperature, with increasing deformation the amount of proeutectoid ferrite increased and the amount of bainite decreased.

关 键 词：低C钢 铌微合金 热变形 相变 

分 类 号：TG142.15[一般工业技术—材料科学与工程]