Abstract
The effect of powder lubrication and mechanical properties on room temperature and warm compacting behavior has been investigated by examining various kinds of metal powders. Compacting process is modeled by analyzing the compacting behavior based on the punch load-stroke diagram.It is understood that the model of the punch load-stroke diagram is composed of straight line (Stage I: powder flow), hyperbolic curve (Stage II: plastic deformation or fracture) and straight line (Stage III: bulk elastic strain). Larger or more spherical particles having lower friction allow lower pressure compacting in Stage I. In stage II, lower elastic modulus and yield point, higher ductility and n-value, and lower surface friction of particles are effective to allow lower pressure compacting.It is confirmed that the method of die wall lubrication is better than powder lubrication to obtain higher density, though the latter method is suitable for green compacts with regular configuration under lower compacting pressure. Warm compaction enhancing good lubricating effect significantly affects decreasing compacting pressure through stage I and II. The compacting pressure is effectively reduced to get higher density only when powder particle indicates lower yield point and higher ductility.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japan Society of Powder and Powder Metallurgy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
