Melting and Pouring for investment castings
Castings is a production process to pour
molten metal into a prepared mold to form its shape, castings products are widely
used in our daily life, such as furniture hardware, cooking hardware, automatic
parts, etc.
Do you know how metals are molten in
Investment castings foundry? Let’s talk about it today.
1, Prepare the raw materials, for example,
if we want to produce pump bodies with material stainless steel 316, we prepare
the Alloys, scrap metal according a formula that specifies the percentages of
each type.
2, Put the raw material into electric
furnace tank.
3. Turn on the electric furnace, electrodes
run electrical current through the metal inside the furnace, and the
metals inside the tank is molten gradually
4, After all the metals are molten entirely,
add slagging agent into molten metal in time in order to remove the steel slag
on the motel steel surface. As steel slag will create casting defects in final
products.
5, Take a spoon of molten metal as specimen
to check the chemical components by Spectrometer. If the chemical components don’t
meet the standard, then add corresponding alloy to adjust its percentage, after
the added alloy molten entirely, take specimen and test it again, repeat this
process until all the chemical components meet the standard.
In our foundry, our professional engineer can
make the chemical components meet the standard with one adjustment step at most.
For materials with regular production, they don’t need any adjustment, it increases
the production efficiency and saves the production cost. As a result, it helps
clients to save cost.
6, After the chemical components and temperature
of molten metal meet the specified standard, pour the molten metal into
investment castings shell.
7, Take the last remaining molten metal as
specimen to check its chemical components again by spectrometer, use this result
as the final chemical components report for this pouring batch.
8, Keep the specimen for one year for traceability,
or keep specimen longer according to clients’ requirement.
