Ti6Al4V粉末热等静压致密化的数值模拟  

Numerical Simulation of Densification of Ti6Al4V Powder During Hot Isostatic Pressing

作　　者：刘德晖 游东东[1,2] 黄庆云 LIU De-hui;YOU Dong-dong;HUANG Qing-yun(National Engineering Research Center of Near-Net-Shape Forming for Metallic Materials,South China University of Tech-nology,Guangdong Guangzhou 510640,China;Metastable Materials Science and Technology SKL,Yanshan University,He-bei Qinhuangdao 066004,China;Harbin Institute of Technology,Shenzhen Graduate School,Guangdong Shenzhen 518055,China)

机构地区：[1]华南理工大学国家金属材料近净成形工程技术研究中心,广东广州510640 [2]燕山大学亚稳材料制备技术与科学国家重点实验室,河北秦皇岛066004 [3]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《机械设计与制造》2020年第1期185-187,191,共4页Machinery Design & Manufacture

基　　金：广东省自然科学基金研究团队（2015A030312003）;广东省自然科学基金（2017A030313320）;亚稳材料制备技术与科学国家重点实验室开放基金（201712）

摘　　要：利用MSC.Marc对Ti6Al4V粉末热等静压致密化进行数值模拟,选用Shima屈服准则,分析了粉末在热等静压过程中颗粒的流动及整体致密化趋势。同时,通过热等静压试验,验证了数值模拟结果的准确性。模拟结果表明:粉末在致密化过程中先受热膨胀后收缩致密;除包套端盖与侧壁夹角处的粉末相对密度较低以外其他区域密度相差不大,部分区域已达全致密。试验表明:压坯的收缩量、相对密度分布与模拟结果基本一致。数值模拟结果合理可靠,可以为成形复杂钛合金构件提供参考。To simulate the densification of Ti6 Al4 V powder during hot isostatic pressing,the Shima model of MSC.Marc was used to calculate the flow and densification trend of powders at different stages.Meanwhile,hot isostatic pressing experiments were performed to verify the accuracy of numerical simulation results.Simulation results show that:During the densification process,the powder expands first and then shrinks.Basically,the relative density of the powder is uniform except the included angle of end cover and side wall,some areas has been completely dense.Experimental results of HIP show that:The amount of contraction and distribution of relative density are in good agreement with the simulation results.The results of numerical simulation are reasonable and reliable,which can be used as reference for forming complex titanium alloy members.

关 键 词：Ti6Al4V粉末 热等静压 致密化 数值模拟 

分 类 号：TH16[机械工程—机械制造及自动化] TF124[冶金工程—粉末冶金]