CAJ | 학술논문

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.
위료분석현유형강알제공예적합이성,필수종합고필알건적미관조직연화、알제력등다방면인소.위차,문중제출료침대H형강다도차알제과정적종합수치분석류정,통과열모의실험화금상관측,건립알건재료적고온굴복응력모형급오씨체재결정예보모형,병구건기우망격중구적다도차방진분석방법.대모11도차H형강다도차조알과정적방진계산표명:알제력적계산결과화현장실측수거문합교호,현유다도차조알공예대알건복판적정립세화작용교위명현.
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.