Page 173 - Module DMV20173

EXERCISE 9.1

1. Describe briefly the production steps involved in making powder metallurgy parts.

Answer:
The powder metallurgy process consists of the following operations in sequence,
which begins with the powder production, blending, compaction, sintering and
finishing operations.
Pressing

Isostatic pressing
Atomization Rolling Atmosphere

Reduction Extrusion

Electrolytic deposition

Carbonyls Cold Sintering
compaction

Metal Blending Secondary

powders and finishing
Hot
compaction
Additive Coining
Lubricant
Isostatic pressing Forging
Machining
Heat treating
Impregnation

2. Why blending the metal powder is essential in powder metallurgy processing?

Answer:
Blending the metal powder is essential in powder metallurgy processing in order to

impart special physical and mechanical properties and characteristics to the powder
metallurgy product. Proper mixing is essential to ensure the uniformity of mechanical
properties throughout the part.