耐磨钢高温压缩变形的本构模型构建及热加工图  

Constitutive Model Establishment and Hot Processing Map of Wear-Resistant Steel in High-Temperature Compression Deformation

作　　者：杨哲懿 孟凡志[3] 杨博 高磊 王帅 王尊呈 YANG Zheyi;MENG Fanzhi;YANG Bo;GAO Lei;WANG Shuai;WANG Zuncheng(State Key Laboratory of Metallic Materials for Marine Equipment and Application,Anshan 114009,China;Hot Rolling Product Research Institute,Ansteel Group Iron and Steel Research Institute,Anshan 114009,China;Hot-rolled Steel Factory,Ansteel Co.,Ltd.,Anshan 114021,China)

机构地区：[1]海洋装备金属材料及其应用全国重点实验室,鞍山114009 [2]鞍钢集团钢铁研究院热轧产品研究所,鞍山114009 [3]鞍钢股份有限公司热轧带钢厂,鞍山114021

出　　处：《机械工程材料》2025年第3期114-120,共7页Materials For Mechanical Engineering

摘　　要：应用Gleeble-3800型热模拟试验机对耐磨钢进行高温(800~1200℃)、中等水平应变速率(0.1,1,5,10 s^(−1))下的单道次热压缩变形,研究了该钢的热压缩变形行为;根据真应力-真应变数据,通过引入真应变的影响对传统Arrhenius方程改进后建立本构模型,并将计算结果与试验结果进行对比;绘制热加工图,确定合理的加工区间。结果表明:试验钢的流变应力随着变形温度的升高或应变速率的减小而降低;随着变形量的增加,真应力先增加至峰值应力后趋于稳定,但在高温(不低于1100℃)和低应变速率(0.1 s^(−1))下真应力达到峰值应力后先略微降低后趋于稳定。所建立的本构模型计算得到的真应力与试验结果吻合较好,平均相对误差为3.79%,线性相关系数为0.9975,证明所建立的本构模型能够准确预测试验钢在800~1200℃变形温度和0.1~10 s^(−1)应变速率下的高温流变行为;试验钢在单道次热压缩变形时的合理加工区间为真应变不大于0.5、应变速率不大于10 s^(−1)、变形温度900~1100℃。The wear-resistant steel was subjected to single pass thermal compression deformation at high temperatures(800‒1200℃)and medium strain rates(0.1,1,5,10 s^(−1))with Gleeble-3800 thermal simulator.The thermal compression deformation behavior of the steel was studied.According to the true stress-true strain data,the traditional Arrhenius equation was improved by introducing the influence of the true strain,and then the constitutive model was established.The calculated results were compared with test results.The hot processing map was drawn to determine the reasonable processing range.The results show that the flow stress of the test steel decreased with the increase of deformation temperature or the decrease of strain rate.With the increase of deformation,the true stress first increased to the peak stress and then became stable,except at high temperature(not less than 1100℃)and low strain rate(0.1 s^(−1)),the true stress first decreased slightly after reaching the peak stress and then became stable.The true stress obtained by the established constitutive model was in good agreement with the test results,with the average relative error of 3.79%and the linear correlation coefficient of 0.9975,indicating that the constitutive model could accurately predict the rheological behavior of the test steel at the deformation temperature of 800‒1200℃and the strain rate of 0.1‒10 s^(−1).The reasonable processing range of the test steel under single pass thermal compression deformation was true strain of no more than 0.5,strain rate of no more than 10 s^(−1),and deformation temperature of 900‒1100℃.

关 键 词：耐磨钢 本构模型 热加工图 单道次热压缩 

分 类 号：TG142.1[一般工业技术—材料科学与工程]