H型钢多道次粗轧工艺过程的数值分析

Numerical Analysis of Multi-Pass Rough Rolling Process of H-Beam

为了分析现有型钢轧制工艺的合理性,必须综合考虑轧件的微观组织演化、轧制力等多方面因素.为此,文中提出了针对H型钢多道次轧制过程的综合数值分析流程,通过热模拟实验和金相观测,建立轧件材料的高温屈服应力模型及奥氏体再结晶预报模型,并构建基于网格重构的多道次仿真分析方法.对某11道次H型钢多道次粗轧过程的仿真计算表明:轧制力的计算结果和现场实测数据吻合较好,现有多道次粗轧工艺对轧件腹板的晶粒细化作用较为明显.

In order to analyze the reasonability of the existing shaped-metal rolling process, the microstructure evolution and the rolling force must besynthetically considered. This paper proposes an integrated numerical analysis procedure to simulate the multi-pass rough rolling process of H-beam, establishes a high-temperature yield stress model and an austenite-grain evolution model based on the thermal simulation and the metallographic observation, and presents a multi-pass simulation method through a re-meshing procedure. Simulated results of an 11-pass rough rolling process of a typical-size H-beam show that the calculated rolling force accord well with the measured ones, and that the austenite grains at the web can be apparently fined after the rough rolling.