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A so called perfect combine harvester blade has to
be both hard and wear resistant. Hard because it
has to cut through the crops both wet and dry, and
wear resistant to give it a longer life. Also it
should not be brittle nor get wraped whenever an
obstacle comes its way. To fulfill all these
requirements we at VERSA®
AGRO had researched a lot to give the farmers best
suitable for them. |
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The general trend in manufacturing harvester
blades is that they are induction hardened
at the cutting edges (55-58 HRC) while rest
of the area is kept as it is (15-18 HRC).
Though due to the inductive portion the
cutting edges don’t wear off easily but
being brittle may break off at that portion
when an obstacle comes and may get wrapped
at the soft part which reduces the cutting
efficiency of the blade. (see Fig.1) |
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To overcome this problem we at VERSA®
AGRO has come up with bit different blade
where the hardness of the cold rolled strip,
from which the blank is cut, is kept at
20-25 HRC. This quality gives the otherwise
softer part some toughness against warp
page. After that the blade is induction
hardened at the cutting edges to about 58-60
HRC. After all this the complete blade is
oil tempered to give the cutting edges the
toughness required to cut through the crop
without breaking and lasting long.(see Fig.
2) |
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One more common thing with iron blades is that
they get rusted with only slight moisture in the
air. The rust actually eats up the teeth thus
making it weak. For that reason we coat the blades
with a special varnish which gives it a protective
coating against rust and at the same time gives it
a shine thus making the blade safe even when not
in use for long time |
