摘要
针对钼粉末热挤压过程中的受力状态,着重研究了包套热挤压三维压应力特征。利用Deform-3D软件建立了有限元模拟模型,计算获得了挤压过程中载荷-行程曲线以及温度、相对密度、等效应力、等效应变等的分布特征。结果表明:包套热挤压可以显著提高粉体的致密度;挤压载荷在挤压稳定阶段呈缓慢增长趋势;最大温度和最大等效应变出现在模口下方;最大等效应力出现在模口处。
Aiming at the stress state of Mo powder in hot-extrusion process, the three-dimensional compressive stress characteristics of canned hot extrusion were studied emphatically. A finite element simulation model was established using Deform-3D software. The load-stroke curve and the distribution characteristics of temperature, relative density, equivalent stress and the equivalent strain and so on were obtained. The results show that the density of the powder can be improved significantly by canned hot extrusion. The extrusion load shows a slow growth trend in the extrusion stabilization stage. The maximum temperature and maximum equivalent strain appear below the die entrance. The maximum equivalent stress appears in the die entrance.
作者
徐雅琪
梁军浩
豆素勤
XU Yaqi;LIANG Junhao;DOU Suqin(School of Science,Xijing University,Xi'an 710123,China;School of Materials Science&Engineering,Xi’an Polytechnic University,Xi'an 710048,China)
出处
《热加工工艺》
北大核心
2021年第13期106-109,共4页
Hot Working Technology
基金
西京学院科研基金项目(XJ180208)
陕西省科技厅基金项目(2019JQ-857)
陕西省表面工程与再制造重点实验室天元开放基金项目(tywl2019-14)。
关键词
钼粉末
数值模拟
包套热挤压
Mo powder
numerical simulation
canned hot-extrusion
