Cylinder Wall Hardening Process Applied
Controlled Thermal Process-ing, Inc., Streamwood, IL, has successfully applied an induction hardening process to cylinder walls in a NASCAR racing engine. The process has potential applications in piston engines used in racing, marine, and aircraft applications, as well as in over-the-road trucks. The process uses both induction hardening and cryogenic processing to harden the cylinder wall surface to a depth of approximately 0.035 inches. The hardness of the cylinder wall surface is increased from the untreated hardness in the low HRC 20's to the mid HRC 50's. The hard layer develops a fine martensitic, wear-resistant structure.
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