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 FLAME ADJUSTMENTS
Three basic flame adjustments are used to deposit
hard-facing rods.
The excess MAPP flames (3X and 4X as shown in
Figure 2-3) are used to:
(1) Spread the heat to minimize possible
burn-through on thin edges;
(2) add excess carbon to the skin of the part being
hard-faced.
The additional carbon lowers the melting point and
sweating temperature of the part, facilitating the
deposit of the hard-facing alloy.
FIGURE 2-3. Flame Adjustments for
Hard-Facing.
2-15
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