CAJ | 학술논문

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。
위연구오합금분말열등정압(HIP)적치밀화행위，채용 MSC. Marc중적 Shima모형침대93W-4.45Ni-2.2Fe-0.3Co-0.05Mn천갑탄상용재료적열등정압성형과정진행모의연구，분석오합금분말과립여포투수온도、압력가재적변화과정。위험증수치모의적결과，진행열등정압공예시험。결과표명：압배적상대밀도분포、변형추세여실험결과부합득교호，경향주장오차최대，상대오차위5.6%，축향상대오차위1.62%，축향정도우우경향，치밀도평균상대오차부위1.4%。대우간단적주상시건，채용수치모의적방법가이형상、준학지예측포투적변형급분말적치밀화과정，수치모의적방법가이위복잡결구포투적연구제공삼고，종이실현열등정압과정적정학공형。
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.