摘要
为研究钨合金粉末热等静压(HIP)的致密化行为,采用MSC.Marc中的Shima模型针对93W-4.45Ni-2.2Fe-0.3Co-0.05Mn穿甲弹常用材料的热等静压成形过程进行模拟研究,分析钨合金粉末颗粒与包套随温度、压力加载的变化过程。为验证数值模拟的结果,进行热等静压工艺试验。结果表明:压坯的相对密度分布、变形趋势与实验结果符合得较好,径向周长误差最大,相对误差为5.6%,轴向相对误差为1.62%,轴向精度优于径向,致密度平均相对误差仅为1.4%。对于简单的柱状试件,采用数值模拟的方法可以形象、准确地预测包套的变形及粉末的致密化过程,数值模拟的方法可以为复杂结构包套的研究提供参考,从而实现热等静压过程的精确控形。
For investigating the densification behavior of tungsten alloy powders during hot isostatic pressing （HIP）, the Shima yielding criterion of MSC. Marc was applied to simulate the process of 93W-Ni-Fe in most use for penetrators during HIP. The process of powders and capsule changing along with the changing of temperature and pressure was studied. In order to verify the simulation results, HIP experiments were conducted. The results of prediction were compared with that of experiment and it shows that the maximum relative error of simulation is 1.62% in axial direction and 5.6% in radial direction, the accuracy of the former is better; the average relative error of density is only 1.4%.For simple cylindrical components, numerical simulation can visually and accurately predict the deformation of capsule and the densification of powders. In short, this method can be set for the study of complex structure caused by deformation.
出处
《粉末冶金材料科学与工程》
EI
北大核心
2014年第6期839-846,共8页
Materials Science and Engineering of Powder Metallurgy
基金
国家科技重大专项资助项目(2009ZX04005-041)
