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采用等径角挤扭新工艺(ECAPT)在200°C条件下实现纯铝粉末颗粒的固结。采用扫描电子显微镜(SEM)和透射电子显微镜(TEM)深入研究粉末细化和固结行为,并对变形后试样的密度、硬度和室温压缩性能等进行测试。结果表明:等径角挤扭工艺是实现在相对较低的温度下粉末固结的有效方法。在200°C下经4道次变形后,成功将纯Al颗粒固结为致密的块体材料,固结后的材料具有较细的晶粒结构和良好的力学性能。深入分析了晶粒细化和固结机理。等径角挤扭工艺是具有良好前景的以粉末为原材料制备高性能块体材料的工艺。
Adopting ECAPT to achieve the consolidation of pure aluminum powder particles at 200 ° C. The thinning and consolidation behavior of the powders were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The densification, hardness and room temperature compression properties of the samples were tested. The results show that the isokinetic squeeze-twisting process is an effective method to achieve powder consolidation at a relatively low temperature. After 4 passes deformation at 200 ° C, the pure Al particles were successfully consolidated into a dense block material. The consolidated material has a fine grain structure and good mechanical properties. In-depth analysis of grain refinement and consolidation mechanism. Isotope angular extrusion twist process is a promising process for the preparation of high-performance bulk materials with powder as the raw material.