Flashcards
Powder Metallurgy
Cards in this deck (5)
- 1Powder MetallurgyComponent manufacture by mixing of elemental alloy or ceramic/refractory powders and compacting the mixtures in a die.
Resultant shapes are then sintered to bond particles metallurgically - 2Step 1Mixing and Blending.
To produce homogeneous mixture of powder metal with optimum particle size; size distribution; particle shape structure and surface condition.
To incorporate the lubricant to reduce friction between powder and surfaces of the compact tooling
-assisting uniformity of density with the compact
- make it easier to eject compact without cracking - 3Step 2Compact powder metal into green state.
Cold welding - limited strength achieved - 4Step 3Sintering - heating and pressurising
Develop mechanical properties.
- use protective N2 or Ar
- 70-90% of Tmelt
- Powder particle weld together: metallurgic bonds
- Removes porosity (5-10% remains) ... 10-25% shrinkage - 5Step 4Minimal finishing
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- Bachelors Degree Materials Flashcards on Powder Metallurgy, created by Nick Gray on 14/01/2016.
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- Nick Gray
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