ABSTRACT

The study of densification on the porous surface of cross-section bilayer Iron powder compact was covered in this work. Both manipulated layers consisted of similar mechanical properties of powder with a mass of 10 grams applied and compacted under three different force magnitudes in a lubricated die condition. Three samples of bilayer were prepared according to the different load applied on the upper layer, 95 kN, 75 kN, and 55 kN. A load of 30 kN was then applied to the lower layer of iron for all labeled samples. Resulted thickness of a 10 mm bilayer sample was obtained after employing a one-sided double compression technique within rigid die. The consequence of navigation on its cross-section, which included the top, middle, and bottom regions was performed manually using an optical microscope. The results revealed that the first layer (or bottom layer), which was compacted by applying a minimum of 30 kN and the second layer (or upper layer), which was compacted by three different specified loads, possessed a lower percentage in porosities. However, the highest load of 95 kN on the second layer displayed homogeneous densification around the interface, that is, 0.95 in which is near to full relative density.

摘要

这项工作涵盖了截面双层铁粉压坯多孔表面的致密化研究。两个操作层均由粉末的相似机械性能组成，在润滑模头条件下，以10克的质量施加并在三种不同的力大小下压实。根据施加在上层的不同负载（95 kN，75 kN和55 kN）制备三个双层样品。然后将30 kN的负载施加到所有标记样品的铁的下层。在刚性模具中采用单面双压缩技术后，可获得10毫米双层样品的最终厚度。使用光学显微镜手动执行其横截面（包括顶部，中间和底部区域）导航的结果。结果表明，通过施加最小30 kN压实的第一层（或底层）和通过三种不同指定载荷压实的第二层（或上层）孔隙率较低。但是，第二层上的最大负载95 kN在界面周围显示出均匀的致密化，即0.95，接近完全相对密度。