基于锻坯的大型内台阶环件双件轧制

发布时间：2018-11-14 19:52

【摘要】：利用Gleeble-3500D热模拟实验机对Q345E钢进行单道次热压缩实验,建立起环件用钢的流变应力模型,在有限元模拟软件SIMUFACT中建立起大型锻坯内台阶环件双件轧制三维数值仿真模型,对大型内台阶环件一个生产周期内的环件轧制过程进行了数值模拟,并对其可靠性进行了实验验证,研究了环件热轧过程中环件不同部位的等效应变场、温度场、辗扩力以及金属流动特性的规律。结果表明:轧制过程中环件的应变分布规律为,驱动辊、芯辊与环件台阶高度的应变、环件的棱角区的应变要明显大于环件其他部位的应变,且越靠近这些部位的应变越大,反映出整个环件轧制过程中变形区由成形辊与环件接触面部位和棱角处向环件内部逐渐扩展;环件的高温区域越来越来窄,且向环件内部集中,环件内部的温度要远远高于驱动辊和芯辊与环件接触部位的温度;轧制力与轧制力矩的变化规律为先增大后保持在一定范围内波动,最后逐渐下降。
[Abstract]:The single pass thermal compression test of Q345E steel was carried out by using Gleeble-3500D thermal simulation machine, the flow stress model of ring steel was established, and the 3D numerical simulation model of two-piece rolling of large forging billet inner step ring was established in the finite element simulation software SIMUFACT. The rolling process of large inner step ring in a production cycle is numerically simulated, and its reliability is verified experimentally. The equivalent strain field and temperature field of different parts of ring during hot rolling are studied. Rolling force and metal flow characteristics. The results show that the strain distribution law of the ring during rolling is that the strain of the driving roll, the core roll and the step height of the ring, the strain of the corner region of the ring is obviously larger than that of the other parts of the ring, and the strain closer to these parts is larger than that of the other parts of the ring. It shows that the deformation zone of the whole ring rolling process extends gradually from the contact part and the corner of the forming roll to the ring part. The high temperature region of the ring is narrower and concentrated in the inner part of the ring. The temperature inside the ring is much higher than that of the driving roller and the contact part between the core roll and the ring. The law of variation of rolling force and rolling moment is that the rolling force increases first, then fluctuates in a certain range, and then decreases gradually.
【作者单位】：太原科技大学金属材料成形理论与技术山西省重点实验室;
【基金】：山西省重点研发计划重点项目(03012015004)
【分类号】：TG335

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