Figure 6-20.Grader blade with hardfacing material applied to cutting edge.
cone. Unless the excess fuel-gas flame is used, the
grader blade is usually wearfaced by the electric arc
proper base metal surface condition cannot be devel-
process. If the electric arc process is not available, you
oped. Without this condition, the surfacing alloy does
may use the oxygas torch.
not spread over the surface of the part.
Welding Materials Handbook, NAVFAC P-433, is
Figure 6-20 shows a grader blade with a deposit of
an excellent source of information for wearfacing con-
hardfacing material applied along the cutting edge. A