Casting Processes
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seminar surveyer
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Posts: 3,541
Joined: Sep 2010
03-01-2011, 11:01 AM

Metal Casting
 Create liquid metal - Melting
 Combustion used to melt material
 Electricity used to melt material
 Create solid shape - Casting
 Permanent mold casting
 Semi Permanent mold casting
 Consumable mold casting

Oxy-fuel Furnace
 Uses a fuel gas such as propane, natural
gas or acetylene
 Oxygen or atmosphere is blown in and
combined with fuel
 Heat from combustion melts the charge

Resistance Furnace
 A current passed through a material
resulting in ohmic heating
 Radiation heats charge material
 Some convection and conduction occurs

Induction Furnace
 A current is passed through a water
cooled coil near or around the charge
 Eddy currents are produced in the charge
material in response to the coil current
 Heat is generated through ohmic heating
in the material

for more:

seminar flower
Super Moderator

Posts: 10,120
Joined: Apr 2012
26-05-2012, 02:47 PM

Casting Processes

.pdf   Casting Processes.pdf (Size: 3.15 MB / Downloads: 163)

Types of Parts Made

Engine blocks
•Fire hydrants

Complex, 3-D shapes

Near net shape
•Low scrap
•Relatively quick process
•Intricate shapes
•Large hollow shapes
•No limit to size
•Reasonable to good surface finish


•Lost foam
•Single crystal
• Directional solidification

Metals processed by casting

•Sand casting – 60%
•Investment casting – 7%
•Die casting – 9%
•Permanent mold casting – 11%
•Centrifugal casting – 7%
•Shell mold casting – 6%


–sand casting - as large as you like
–small - 1 mm or so
–0.005 in to 0.1 in
•Surface finish
–die casting 8-16 micro-inches (1-3 mm)
–sand casting - 500 micro-inches (10-25 mm)

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