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is Cryogenic Treatment?
can you expect?
Industries - Welding Electrodes and Contacts
* Increased Life in Welding Electrodes
* Wire Feed Contacts Last Longer
One of the surprising things about cryogenic
processing is that it affects non-ferrous metals. Conventional wisdom
says that only ferrous metals should be improved by cryogenics. But
this is not true. We know from experience that resistance welding
electrodes last two to four times longer after cryogenic processing.
Wire guides and contacts also last longer.
The typical mode of failure for welding electrodes is thermal cyclic
fatigue. The part is heated and cooled many times which causes cracks
to form. The cracks then propagate and the surface starts to collapse.
This changes the surface area which throws off the welding parameters
and the part starts to fail rapidly. Cryogenic processing delays the
initial cracking and reduces the resistivity of the part. The
increased life reduces welding costs and increases profits. It also
improves the quality of the weld.
Resistance Welding Electrodes
MIG wire guides
Cryogenic processing has uses in weldments and in welding. Weldments
often contain residual stresses, and cryogenics will release those
stresses. Weldments will not distort as much during use.
Resistance welding electrodes
Cryogenically treated resistance welding electrodes will last about 3
to six times longer than untreated electrodes. The mode of failure for
the electrodes is thermal cyclic fatigue, hastened by the pressure put
on the electrode. The electrode end starts to mushroom, and then the
weld parameters go out of specification. Cryogenic processing can
greatly delay this. Auto makers use these electrodes by the thousands.
Other uses in the welding industry are wire guides for wire welding
machines and nozzles used on wire feed welders. These nozzles build up
ash and weld spatter. The spatter and ash do not stick as readily when
the parts are cryogenically treated.
Electrical contacts also benefit from cryogenic. They can carry more
current, and lose less live on make or break. Relays and circuit
breakers are prime beneficiaries to this technology.
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