POWDER METALLURGY

1
IE 204 Manufacturing Processes
Dr. Zühal ERDEN

• POWDER METALLURGY
• Compaction of finely powdered solids into a mold
• and the fusing of the particles.
• Preparation of the powdered material
• Blending of the powdered material
• Filling the die with the powder and compaction
• Sintering (Heating without melting)

Atilim University / Dept. of Industrial
Engineering
2
IE 204 Manufacturing Processes
Dr. Zühal ERDEN

• Powder Preparation
• Crushing solid in a ball mill
• Grinding
• Melting and atomizing the metal
• Chemical precipitation from solution
• Solidification from vapor phase

Atilim University / Dept. of Industrial
Engineering
3
IE 204 Manufacturing Processes
Dr. Zühal ERDEN
Powder Metallurgy-Materials Iron-based or
copper-based powders Aluminum, carbides of
various metals, chromium, cobalt, graphite, lead,
nickel, tungsten, zinc, titanium.
Atilim University / Dept. of Industrial
Engineering
4
IE 204 Manufacturing Processes
Dr. Zühal ERDEN

• Compaction
• Briquetting
• Roller compacting
• Extrusion compacting
• Explosion compacting

Atilim University / Dept. of Industrial
Engineering
5
IE 204 Manufacturing Processes
Dr. Zühal ERDEN
Sintering The compressed metal powder is heated
to a temperature below its melting point, but
sufficiently high to allow bonding (fusion) of
the individual particles. Sintering temperatures
? 70 to 90 of the melting point of the
metal or alloy Sintering time ? 10 min. For iron
and copper alloys to 8 hrs for tungsten
Atilim University / Dept. of Industrial
Engineering
6
IE 204 Manufacturing Processes
Dr. Zühal ERDEN
Finishing Operations Heat treating, for
improved hardness and strength Machining by
milling, drilling and tapping to produce threaded
holes Grinding, for improved dimensional
accuracy and surface finish Plating, for wear
resistance, imroved appearance and corrosion
resistance
Atilim University / Dept. of Industrial
Engineering
7
IE 204 Manufacturing Processes
Dr. Zühal ERDEN
Applications Gears, cams, bearings, cutting
tools, Automotive components, engine
supports, fuel elements for nuclear reactors
Atilim University / Dept. of Industrial
Engineering