MEC 431 Lecture 19: MEC431 w19

• School: Ryerson University
• Department: Mechanical Engineering
• Course: MEC 431
• Professor: N/ A

Document Summary

Atomization the process of creating small droplets by breaking up a melt stream. Fibre production the melt is deposited between two spinning water cooled rolls: machining powders are produced by machining or grinding a cast or coarse grained billet. Generally, powders are subjected to a few preparatory steps before pressing: screening to remove large flakes, mixing powder metallurgy alloys can be created by mixing pure powders together. These (cid:498)alloys(cid:499) do not provide the same properties as: blending to ensure a homogeneous powder mixture. regular alloys, but can be made more cheaply (ie bronze & graphite) Irregularly shaped particles will: shape of the powder particle depends on the production method. It: fineness (cid:523)size(cid:524) determined through screening (cid:523)(cid:886)(cid:887) to (cid:883)(cid:882)(cid:882) m(cid:524, compressibility is the ratio of the initial powder volume to the compressed volume. It is dependant on the powder shape, size and influences flowability, density, porosity and mechanical properties such as strength and elasticity. lubrication.