无缝钢管穿管过程动态再结晶晶粒变化规律

采用热/力模拟技术研究33Mn2V钢在不同变形速率、变形温度条件下的动态再结晶晶粒尺寸模型。利用有限元软件MSC.Marc/AutoForge3.1,并采用二维热力耦合的刚塑性有限元法,研究了33Mn2V钢穿管过程中管件内部动态再结晶晶粒尺寸的变化及分布情况。模拟结果表明,荒管管壁的动态再结晶晶粒大小在穿管过程中是时刻变化,而且是在一个基准范围内变化的,这个基准的动态再结晶晶粒尺寸应最终成为荒管管壁内的基本动态再结晶晶粒尺寸。模拟结果经实验验证说明,该模拟分析方法和模拟结果,能够满足研究工作和工艺优化工作的基本要求。

Grain change of 33Mn2V steel for seamless oil well tubes in tube-piercing process

The austenite dynamic recrystallization grain model of steel 33Mn2V for new non-quenched/tempered oil-Weil tubes in different deformation temperatures and deformation rates is studied by thermal/dynamic simulation technology. The rigid-plastic finite element method (FEM) was used to simulate the dynamic recrystallization grain change of new steel 33Mn2V for seamless oil well tubes in tube-piercing process with software MSC. Marc/AutoForge 3.1. The thermo-mechanical coupling analysis was conducted with the consideration of heat transfer between workpiece, roll and atmosphere, and the heat generated by plastic work and friction force. The results of simulation show the dynamic recrystallization grain size of barren tube were changing with in a basic scope in the tube-piercing process. Comparing the simulation results with the independent thermal/dynamic simulation experiments and the metallography photos, the accuracy of simulation result is enough to meet the requirement of research work and process optimization work.