This has brought about a new generation of metals and materials that have increased wear life primarily through the reduction of friction between mating components. Some have taken the form of harder metal alloys and others are surface enhancements that perform better than oils or greases. Magnaplate has been in the forefront of almost all these newer materials. These materials are composites and or alloys that are diffused into or onto base metal substrates. In some cases, new oxides or harder porous metals are developed electrochemically or by plasma spraying or in some cases, multi layers of soft and hard metals are deposited and then diffused both into and on top of the base metal.
Heat changes clearances, expansion and contraction due to heat build up during operation.
Friction will cause rapid heat build up. Mating metals must never be of a like hardness as this will result in fast heat up and rapid cold welding of mating parts. Norman cycling may cause excessive friction. Components rubbing together may rapidly cold weld. Therefore you must select the best and least complex surface treatment that can make a low cost metal perform its intended function longer and better.