Effect of Sheath Structure on Molybdenum Billet Forging Process

摘要:

运用DEFORM-2D软件对钼坯料近等温包套镦粗成形过程进行了数值模拟，研究了壁厚、包套底厚对成形效果的影响。结果显示：相同变形量下，坯料的密度分布均匀性随包套壁厚的增大得以改善，随包套底厚的增加逐渐变差。包套壁厚不同时，随变形量的增加，密度分布均匀性都呈现先变差后变好的趋势，变形量达到80%时，坯料的密度分布最均匀。包套底厚不同时，当变形量小于62%，坯料的密度分布均匀性随变形量的增加先变差后变好，变形量大于62%，坯料密度分布随包套底厚的增加越来越均匀。

Abstract:

The numerical simulation was implemented using FEM software DEFORM-2D to study the influence on deforming quality caused by sheath wall thickness and sheath bottom thickness. The results show that when the deformation degree is the same, the density distribution uniformity of the billet becomes better along with the increase of sheath wall thickness, but poor with the increase of sheath bottom thickness. Under the conditions of different sheath wall thicknesses, the billet density distribution uniformity first gets worse and then gets improved with the increase of deformation degree, and the uniformity becomes the best when the deformation degree is 80%. Under the conditions of different sheath bottom thicknesses, when the deformation degree is less than 62%, the density distribution uniformity of the billet gets worse first, and then gets improved; when the deformation degree is over 62%, it becomes better as sheath wall thickness increases.