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Compression Curves and Values
The
compression curves and surface values are created during diffusion.
The gas atoms of Nitrogen and Carbon, introduced after the steel attains its proper temperature, diffuse into the steel's surface.
This creates a
nano-atomic structure which in effect stretches the surface as the Nitrogen
and Carbon are diffused. Tensile and compressive stresses are in
opposition to one another. As the atoms continue to stretch the
surface of the steel an opposing layer of beneficial compressive layer is
created in the diffused zone. In combination with this, a compound
layer is created.
It is well known in
physics that cracks (tensile stresses) cannot propagate into or through a
layer of compression unless the yield strength of the steel is exceeded.
Consequently, by the diffusion, the fatigue strength of the steel is
increased by a moderate levels when compared to the depth and value
of the
MetaLLife
process. Nonetheless, the
ThermaLLife
compression is also beneficial in extending normal tool life.
Related Topics
> - Solder
Benefits |
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Click on graph for larger view
ThermaLLife curves (typical)
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