Dependences of Blanks Density from Pressing Force and Packing Density of Molybdenum and Tungsten Powders

The paper presents an analysis of known theoretical dependences of the density from the force made by native and foreign scientists and experimental results received by scientists of the South Ural State University in the industry conditions with the powders of molybdenum and tungsten. The investigations were carried out using pure tungsten powders, pure molybdenum powders, and powders of molybdenum grades of Mo–Th, Mo–Y, and Mo–La. The parameters of the powders studied (bulk density, average grain size of the powder, and impurity content for each batch of powder), as well as parameters of the process of pressing the blanks (dimensions of blanks, pressing pressure, pressing force, and density of blanks after pressing) are given. As an industrial tool, an industrial hydraulic press was used, as well as a demountable mold of the construction of the authors of the article. On the basis of the data obtained, the dependences of the density on the pressing forces of powder blanks from various tungsten and molybdenum grades for industrial use have been compiled and tested.