非调质钢40MnV楔横轧热变形组织演变模型及数值模拟  

Numerical simulation and modeling of hot deformation microstructure evolution of a non-quenched and tempered steel in cross wedge rolling

作　　者：王敏婷[1] 李学通[1] 姜明昊[1] 杜凤山[1] 

机构地区：[1]燕山大学机械工程学院,国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004

出　　处：《材料热处理学报》2013年第2期168-172,184,共6页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(50705080);河北省自然科学基金(E2011203090);河北省自然科学青年基金(E2012203028)

摘　　要：针对非调质钢轴类件楔横轧工艺,以40 MnV钢为研究对象,进行非调质钢高温热变形组织演变规律实验研究。利用Gleeble 3500热模拟实验机,在900～1100℃、0.1～10 s-1变形条件下进行恒应变速率压缩实验,研究了40 MnV热变形中的力学行为及动态组织变化,并得出了相应奥氏体热变形组织演变晶粒尺寸、再结晶体积分数及晶粒长大数学模型。基于组织演变模型,采用有限元法对空心轴三辊楔横轧热力组织耦合过程进行的数值模拟。通过对比楔横轧成形实验数据结果与模拟计算值,二者吻合良好,验证了该模型可用于楔横轧实际生产过程的组织预报。Aiming at forming process in cross wedge rolling of non-quenched and tempered steels, the experimental research of high hot deformation was performed for steel 40MnV to investigated microstructure evolution during detormation. Constant strain rate compression experiments were carried out at 900-1100 ℃ with the strain rate ranging from 0. 1 s^-1 to 10 s^-1 on a Gleeble-3500 thermomechanical simulator. The deformation behavior and microstructure changes were investigated and the corresponding models of austenite dynamic recrystallized grain size, volume fraction and growth of grain size were established according to experimental data. Based on the microstructure evolution models, a coupling process of thermo-mechanical and microstructure for a hollow shaft on three-roll cross wedge roiling mill was simulated by finite element method. Compared the calculated results with experimental data of cross wedge rolling, the consistency is demonstrated.

关 键 词：楔横轧 非调质钢 热变形 组织 有限元 

分 类 号：TG142.4[一般工业技术—材料科学与工程]