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Weld
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Oxyacetylene Gas Welding uses a fuel gas such as acetylene
or hydrogen is mixed inside a welding torch
with oxygen to produce a flame with a
temperature of around 6,300 °F . This flame
is used to melt the materials to be welded.
A filler rod is melted into the puddle of
molten metal to reinforce the weld. When highly-reactive
metals such as aluminum are gas welded, they
must be covered with flux to exclude oxygen
from the molten metal and keep oxides from
forming which would decrease the strength of
the weld. (An illustration of a carburizing flame,
a neutral flame, and an oxidizing flame is
shown below.)
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