φ70～80轴承钢棒材轧制过程的孔型设计及三维模拟

摘要

A pass system to produce Φ70-80 bearing steel rod by using 300mm billet was developed. With the aid of software MSC. Marc and its user subroutine, 3D FE models for the rolling process coupled with the microstructure evolution model of GCr15 steel were established to simulate the deformation of rolled piece and the rolling force at every pass. Meanwhile, the evolutions of temperature, strain, strain rate and austenite grain size in the rolled piece were obtained. The work realized the virtual computer rolling before practical rolling of rod.%开发了采用300mm方坯生产φ70～80mm规格GCr15轴承钢棒材的孔型系统.利用有限元软件MSC.Marc,建立了该生产过程的三维有限元模型.借助MSC.Marc软件的二次开发功能,将GCr15钢的微观组织演变模型与轧制过程的热力耦合有限元模型相结合,预测了该生产过程中的轧制力、轧件变形情况及轧件内部温度、应变、应变率与奥氏体晶粒尺寸的演变情况,实现了棒材实际轧制前的计算机虚拟轧制.