金属粉末注射成形Fe2Ni变形问题  

Deformation of Fe2Ni prepared by metal powder injection molding

作　　者：慕江瀚 刘淑梅[1] 李大杰 杨杭州 周海涛 MU Jianghan;LIU Shumei;LI Dajie;YANG Hangzhou;ZHOU Haitao(School of Materials Science and Engineering,Shanghai University of Engineering Technology,Shanghai 201620,China)

机构地区：[1]上海工程技术大学材料科学与工程学院,上海201620

出　　处：《粉末冶金技术》2025年第2期191-198,共8页Powder Metallurgy Technology

摘　　要：在金属粉末注射成形Fe2Ni上钳口过程中,因粘结剂偶合性不佳和剪切生热等问题导致金属粉末分布不均,产生变形问题。本文采用熔融指数实验对比分析三种粉末装载量喂料的流动性和偶合性,通过Taguchi方法、极差和方差分析优化浇口面积、模具温度、注射温度三种工艺参数,研究了工艺参数交互作用对剪切应力的影响。结果表明,粉末注射成形最佳工艺参数为粉末装载量(体积分数)62.5%、浇口面23.984 cm^(2)、模具温度69.854℃、注射温度194.323℃。通过Moldex 3D软件进行验证分析得到该条件下产品剪切应力最小,粉末均匀度最高,最终产品变形问题得到改善。In the process of the metal powder injection molding Fe2Ni,the deformation problem was present due to the uneven distribution of metal powders caused by the poor bonding of binder and shear heat generation.The flow and coupling properties of feedstock in three powder loads were compared by melt index experiment in this paper.The gate area,mold temperature,and injection temperature were optimized by Taguchi method,range analysis,and variance analysis,and the influence of process parameter interaction on the shear stress was studied.The results show that the optimum process parameters are the powder loading capacity(volume fraction)62.5%,the gate surface 23.984 cm^(2),the mold temperature 69.854℃,and the injection temperature 194.323℃.Through the verification analysis of Moldex 3D software,the shear stress of the products is the minimum,the powder uniformity is the highest,and the deformation of the final products is improved.

关 键 词：金属粉末注射成形 变形缺陷 粘结剂 剪切应力 仿真优化 

分 类 号：TF124[冶金工程—粉末冶金] TG141[冶金工程—冶金物理化学]