高强度非调质冷镦钢热机轧制实验研究  

Experimental Research on Thermo-mechanical Control Process for High Strength Non-quenched and Tempered Cold Heading Steel

作　　者：曹杰[1,2] 阎军[2] 刘雅政[1] 章静[2] 孙维[3] 于同仁[3] 柳美玲[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [3]马鞍山钢铁股份有限公司技术中心,安徽马鞍山243000

出　　处：《材料工程》2011年第11期35-38,共4页Journal of Materials Engineering

基　　金：科技部支撑计划项目(2007DAE30B04)

摘　　要：在Gleeble-3500实验机上对新研制的非调质冷镦钢进行了低温轧制模拟实验,分析了变形和冷却速率对组织转变的影响。结果表明:冷却速率大于5℃/s,得到的基本为粒状贝氏体组织;冷却速率增加,粒状贝氏体中铁素体基体由块状向板条状转变。奥氏体形变促进铁素体的形核和长大,对粒状贝氏体的组织结构也有影响,在大变形情况下发生形变诱导铁素体相变。硬度测量表明,变形量增加,材料硬度下降。Tests were carried out on a Gleeble-3500 simulator to simulate the low temperature rolling process for a newly developed non-quenched and tempered cold heading steel.The effects of deformation and cooling rate on microstructure transformation were analyzed.The results show that the microstructure of the steel is mainly granular bainite when the cooling rate is above 5℃/s.The matrix of the granular bainite changes from massive shape to lath shape with the increasing of cooling rate.The deformation of austenite not only promotes the nucleation and growth of ferrite,but also has an influence on the microstructure of granular bainite.Large deformation induces ferrite transformation.The hardness testing suggests that the hardness decreases with the increasing of deformation.

关 键 词：非调质钢 变形量 冷却速率 粒状贝氏体 硬度 

分 类 号：TG142.1[一般工业技术—材料科学与工程]