30Cr2Ni2Mo合金钢高温流变应力模型  

Flow stress model of alloy steel 30Cr2Ni2Mo at high temperature

作　　者：张龙[1] 王东城[1,2] 马晓宝 王志杰[1] 陈素文[1] 

机构地区：[1]燕山大学国家冷轧板带装备及工艺工程技术研究中心,河北秦皇岛066004 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004

出　　处：《塑性工程学报》2017年第4期144-149,172,共7页Journal of Plasticity Engineering

基　　金：河北省自然科学基金资助项目(E2016203482);河北省自然科学基金资助项目(E2016203103);河北省高等学校科学技术研究资助项目(ZD2014034);燕山大学青年自主研究计划课题资助项目(14LGA003);燕山大学博士基金资助项目(B946)

摘　　要：定宽压力机作为热轧板带中重要的调宽设备,对板带的正常轧制起着关键作用。为精确模拟定宽压力机曲轴锻造过程,需要研究30Cr2Ni2Mo合金结构钢在其锻造温度区间的高温流变特性。为此,采用Gleeble-3800热模拟试验机对实验钢进行了单道次压缩实验,实测了不同变形温度(850~1050℃)和变形速率(0.1~1s^(-1))下的流变应力,并分析了应力与应变在不同变形条件下的规律,采用线性回归的方法得到与该材料峰值应力对应的Arrhenius方程模型参数,以之为基础建立了该材料高温流变应力数学模型。模型计算结果与实验结果吻合较好,为该钢种锻造过程数值模拟提供了精确的前提条件。Slab sizing press plays a key role on normal rolling steel as the major equipment of width reduction in hot rolled strip. In order to study the forging process of crankshaft for slab sizing press accurately,it is necessary to research the high temperature deformation rheological behavior of the alloy structure steel 30Cr2Ni2Mo in the forging temperature range. Therefore,the single-pass compression experiment was done by Gleeble-3800 thermal mechanical simulator. Under different deformation temperatures between 850-1050 ℃ and strain rates between 0. 1-1s^（-1）,the deformation resistance of the testing steel was measured,and the change law of stress and strain was analyzed under different deformation conditions. Meanwhile,linear regression was applied to obtain the testing steel＇s Arrhenius equation and Z-Hollomen parameter equation,and the mathematical model of high temperature deformation resistance was established on those two equations. The model shows that the calculation results are in good agreement with the experimental results,which can provide mathematical model for forging process simulation.

关 键 词：热模拟实验 流变应力模型 线性回归 本构方程 

分 类 号：TG301[金属学及工艺—金属压力加工]