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首页> 外文会议>2002 International Conference on Process Modeling in Powder Metallurgy amp; Particulate Materials Oct 28-29, 2002 Newport Beach, California >SIMULATION OF FREE SINTERING SHRINKAGE AND DISTORTION BEHAVIOR OF STAINLESS STEEL POWDER COMPACTS
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SIMULATION OF FREE SINTERING SHRINKAGE AND DISTORTION BEHAVIOR OF STAINLESS STEEL POWDER COMPACTS

机译：不锈钢粉末压块的自由烧结收缩和变形行为的模拟

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摘要

An accurate sintering simulation program can significantly improve Powder Metallurgy (P/M) part properties and processing efficiency. The densification behavior of stainless steel powders during free sintering has been simulated and the visco-elasticity material model has been implemented by linking user subroutines to an existing commercial finite element code (ABAQUS) and by implementing a finite element program called SinSolver in MATLAB. This approach is based upon the theories of elastic and nonlinear-viscous deformation of porous bodies. The density distribution of the green compact is considered as an initial condition for the FEM model. The porosity is updated during the simulation. Grain growth, gravity, thermal expansion and other heterogeneous factors are also considered during the simulation. The development of this model is discussed and tests have been performed to validate the simulation results.
机译：准确的烧结模拟程序可以显着提高粉末冶金（P / M）零件的性能和加工效率。模拟了自由烧结过程中不锈钢粉末的致密化行为，并通过将用户子程序链接到现有的商业有限元代码（ABAQUS）并通过在MATLAB中实现名为SinSolver的有限元程序来实现了粘弹性材料模型。这种方法基于多孔体的弹性和非线性粘滞变形理论。生坯的密度分布被认为是有限元模型的初始条件。在模拟过程中会更新孔隙率。模拟过程中还考虑了晶粒长大，重力，热膨胀和其他异质性因素。讨论了该模型的开发，并进行了测试以验证仿真结果。

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