铍粉热等静压成型的数值模拟  

Numerical Simulation on Hot Isostatic Pressing Process of Beryllium Powder

作　　者：马宏昌 何力军 陈磊 李志年 赵世丰 叶书鹏 续昊 Ma Hongchang;He Lijun;Chen Lei;Li Zhinian;Zhao Shifeng;Ye Shupeng;Xu Hao(Ningxia Key Laboratory of Photovoltaic Materials, Ningxia University, Yinchuan 750021, China;State Key Laboratory of Special Rare Metal Materials, Northwest Metal Materials Research Institute, Shizuishan 753000, China)

机构地区：[1]宁夏大学宁夏光伏材料重点实验室,宁夏银川750021 [2]西北稀有金属材料研究院稀有金属特种材料国家重点实验室,宁夏石嘴山753000

出　　处：《宁夏大学学报（自然科学版）》2020年第1期45-49,共5页Journal of Ningxia University(Natural Science Edition)

基　　金：宁夏自然科学基金资助项目(NZ17037)。

摘　　要：应用实测Shima屈服函数描述金属铍粉末热等静压的屈服特征,然后基于MSC.Marc有限元分析软件对铍柱热等静压成型过程进行数值仿真和分析.模拟结果显示:致密化过程主要在升温段的后半程完成,最高相对压制密度可达0.98;成型后除铍柱上下端面附近外,等效应力、应变在绝大部分区域分布均匀.对比铍柱实测尺寸,仿真模拟最大误差轴向为1.58%,径向误差为1.8%.这表明,应用本文实测屈服函数对铍粉末冶金过程的仿真可以获得较高精度,从而为铍构件的近净成型提供可信的参考.The Shima yield function measured by experiments was used to describe the yield characteristics of metal beryllium powder under hot isostatic pressing(HIP),then the HIP process of the beryllium column was numerically simulated and analyzed by utilizing the finite element method(FEM)software MSC.Marc.Simulations show that:densification process is mainly finished during the late of heating stage,the maximum compact relative density can be up to 0.98;expect for the vicinity of top and base face of the beryllium column,values of equivalent stress and strain are in a nearly uniform distribution in most bulk after pressed.Comparing with measurement dimensions of the beryllium column,the maximum relative error of simulation is merely 1.58%in axial direction and only 1.8%in radial direction.It means that simulation on HIP process of the beryllium powders can be obtained with high precision by applying the measured yield function,which may offer the credible reference for the near-net-shape forming of beryllium components.

关 键 词：铍粉 热等静压 致密化 数值模拟 屈服函数 

分 类 号：TG166.7[金属学及工艺—热处理] O242.21[金属学及工艺—金属学]