• CN:11-2187/TH
  • ISSN:0577-6686

›› 2008, Vol. 44 ›› Issue (8): 157-163.

• 论文 • 上一篇    下一篇

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金属注射成形烧结工艺的试验与数值模拟

宋久鹏;BARRIERE Thierry; 柳葆生;GELIN Jean-Claude   

  1. 西南交通大学应用力学与工程系;法国Femto-ST研究所应用力学实验室
  • 发布日期:2008-08-15

Experiments and Numerical Simulations on Sintering Process of Metal Injection Molded Components

SONG Jiupeng;BARRIERE Thierry;;LIU Baosheng; GELIN Jean-Claude   

  1. Department of Applied Mechanics and Engineering, Southwest Jiaotong University Laboratory of Applied Mechanics, Femto-ST Institute
  • Published:2008-08-15

摘要: 采用粘塑性理论建立烧结过程的本构模型,以316L不锈钢粉末注射成形产品为例,设计出烧结过程中重力作用下弯曲梁试验和膨胀计中的自由烧结试验,分别用于标定本构模型中的粘度模量和烧结应力。通过用户子程序,在有限元求解器Abaqus®上实现数值模拟,预测产品在烧结过程中的收缩和变形。考虑了重力、摩擦以及注射阶段粉末与粘结剂的偏析效应对于烧结工艺的影响,数值模拟结果与试验结果一致。

关键词: 金属注射成形, 烧结, 有限元法, 粘塑性

Abstract: To establish the constitutive model of sintering process, visco-plastic theory is adopted. The 316L stainless steel powder injection molded components are investigated as an example. The gravitational bending tests during sintering process and the free sintering experiments in dilatometer are realized to identify respectively the viscosity modulus and sintering stress in the constitutive model. The numerical simulations are realized via the finite element solver Abaqus® by user subroutines for the prediction of shrinkage and deformation of product in the sintering process. The gravity, friction and powder-binder segregation resulted by injection process are taken into account for their effects on sintering process. The results obtained by simulations are consistent with the experimental ones.

Key words: Finite element method, Metal injection molding, Sintering, Viscoplastic

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