Sökning: "powder metallurgy PM"
Visar resultat 21 - 25 av 29 avhandlingar innehållade orden powder metallurgy PM.
21. Efficiency and wear properties of spur gears made of powder metallurgy materials
Sammanfattning : Powder metallurgy (PM) is usually used in manufacturing parts with complex geometries, such as gears and structural parts. The main attractions of PM are the high rate of material utilization, environmental friendliness of production, economic advantages (especially for complex geometries), and possibility of obtaining lighter components. LÄS MER
22. Fracture and stress in powder compacts
Sammanfattning : In the field of powder metallurgy (PM), the production methods are constantly developed and improved to produce components with high precision and strength. Cold uniaxial pressing of powder into a green body is a common process in PM. LÄS MER
23. Modelling and simulation of powder pressing with consideration of friction
Sammanfattning : Finite element modelling and simulation of the powder pressing process can be used in the rational development of powder metallurgy (PM) components. Many of the nonlinear finite element (FE) codes available today can be used for powder pressing simulations. LÄS MER
24. Modelling and simulation of powder pressing with consideration of residual stresses
Sammanfattning : In powder metallurgy (PM), production methods are constantly developed and improved to produce component with high precision and strength. Cold uniaxial pressing of powder into a green body is a common process in PM. LÄS MER
25. Studies of density variations in iron powder caused by the filling operation
Sammanfattning : Detailed information about the density within a part produced by compression of a granular material is perhaps the most important piece of information you need if you are to predict its properties. Nearly all mechanical properties are strongly dependent on the density and the density of a very small region within the part can potentially be disastrous if it has a density level considerably lower then the rest of the part. LÄS MER