Fe-Al叠层复合板热轧过程的有限元模拟

Finite element simulation of hot rolling Fe-Al laminated composite plate

Fe-Al金属间化合物基微叠层复合材料是一种新型叠层复合材料,“轧制复合—合金化热处理”工艺解决了金属间化合物成形困难的技术问题.热轧复合作为材料制备的重要工序,能否在其过程中获得具有良好界面结合强度和板形质量的复合板对于后续工艺过程具有重要影响.本文应用Abaqus有限元软件,模拟了压下率、组元厚比、叠层层数等因素对Fe/Al叠层热轧复合效果的影响,通过测定残余应力、伸长率、应力—应变曲线、平直度等确定了40%的最佳压下率及Fe/Al的最佳厚比1∶0.3,明确了通过改变层数有效控制材料分层厚度的途径.通过热轧实验对模拟进行验证,表明了有限元模型的可靠性.

Fe-Al intermetallic compound-based micro-laminated composite material is a new type of laminated composite material.The"rolling composite-alloying heat treatment"process is adopted to solve the difficulty of forming intermetallic compounds.Hot-rolling composite is an important process for material preparation.Obtaining a composite plate with good interface bonding strength and plate quality has a significant impact on the subsequent processes.Abaqus finite element software was used in this work to simulate the effects of different reduction ratios,component thickness ratios,and number of layers on the quality of the hot-rolled Fe-Al composite.The optimal reduction ratio of 40%and thickness ratio of 1∶0.3 were determined by measuring the residual stress,elongation rate,surface and interface flatness,etc.Moreover,changing the number of layers was clarified as an effective way to control the layer thickness of the material.The reliability of the finite element simulation was verified by hot rolling experiments.