English
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31
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Preparation
1.
Determine the following values from the manu-
facturer's specifications (processing instruc-
tions, data sheet):
• the three most important alloying compo-
nents,
• casting temperature,
• processing requirements (melting with
graphite inserts, use of melting powder, etc.)
2.
Find the BEGO alloy that corresponds most
closely. Sources:See BEGO precious metal
alloys table, BEGO catalog or the information
on alloys available in the download center at
www.bego.com.
3.
Determine the program number of the suitable
BEGO alloy from the program table on page
34.
Casting
1.
Cast the non-BEGO alloy manually with
pyrometer (see page 36 ff). Use the program
number of the identified BEGO alloy for that
purpose.
2.
If necessary, adapt the casting temperature
displayed on the screen to the manufacturer's
specification. Select the highest casting tem-
perature for the recommended casting ranges.
3.
Observe the specifications in the operating
manual from page 36, including the holding
times during the melting process.
4.
Note the casting temperature indicated when
casting is triggered. It is required for setting up
the program for the non-BEGO alloy.
Creating programs
NOTE
Programs 181 to 186 should be used for non-
BEGO alloys without precious metals, which
tend to splatter when heated under vacuum,
because with these programs the alloys are cast
with a reduced vacuum. Programs 191 to 193
use the maximum vacuum and are thus not
suited for such alloys.
There are two methods for creating non-BEGO
alloys:
1.
In the case of a known comparable alloy
2.
With the aid of the alloy finder, at least the
melting interval and the main constituents of
the alloy must be known here.
In the case of a known comparable alloy
1.
Press the button with the preselected alloy in
the main menu. The alloy selection menu
opens.
2.
Press "New" to create/set up a new casting
program.
3.
Enter the name of the known alloy and confirm
with "Enter".
4.
Enter the casting temperature and confirm with
"Enter".
5.
Press the "Save" button to set up the program.
The newly set up alloy program is now availa-
ble as a favourite in the alloy selection list (see
page 43).
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