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- 2019
Cu-Cr粉体致密化颗粒变形及粒子流动三维数值模拟
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Abstract:
基于MSC.Marc有限元软件对Cu-Cr粉体颗粒的单、双向致密化过程进行了细观数值模拟分析。研究了不同压制方式及摩檫系数对Cu-Cr粉体颗粒致密度及形貌变化的影响。结果表明：随着摩擦系数的增大，单向压制Cu-Cr粉体颗粒的致密化程度越高，摩擦系数为0.5时，单向压制的Cu-Cr粉体颗粒最高致密度为96.4040%；随着摩擦系数的减小，双向压制Cu-Cr粉体颗粒的致密化程度越高，在无摩擦理想条件下，双向压制Cu-Cr粉体颗粒致密度最高为89.1630%。在相同条件（摩擦系数、压制力）下，单向比双向压制Cu-Cr粉体颗粒有较高的流动性和致密度，Cu颗粒的应变量差值为1.3385，但双向致密化Cu-Cr粉体颗粒比单向压制的粒度均匀性好。模拟结果与实验结果相符合，验证了模型的准确性。 Based on MSC. Marc finite element software, the densification process of single and two-press Cu-Cr powder particles was microcosmic simulated and analyzed. The effects of different pressing methods and friction coefficients on the particle density and morphology of Cu-Cr powder particles were studied. The results show that with the increase of friction coefficient, the densification degree of unidirectional compacted Cu-Cr powder particles is higher. Under the condition of friction coefficient of 0.5, the maximum density of unidirectional compacted Cu-Cr powder particles is 96.4040%. With the decrease of friction coefficient, the densification degree of the two-way compacted Cu-Cr powder particles is higher. Under ideal condition without friction, the densification of the two-press compacted Cu-Cr powder particles is up to 89.1630%. Under the same conditions (friction coefficient and compressive force), unidirectional compaction has higher fluidity and density than bi-directional compaction, and the strain difference of Cu particles is 1.3385. However, the particle size uniformity of bi-directional compaction is better than that of unidirectional compaction. The simulation results are in agreement with the experimental results, which verifies the accuracy of the model. 株洲冶炼集团股份有限公司产学研重点项目（2040201255
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