Thermal spraying of a piston ring
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United States of America Patent
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Feb 19, 2008
Grant Date -
Apr 7, 2005
app pub date -
Feb 28, 2002
filing date -
Feb 28, 2002
priority date (Note) -
Expired
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Abstract
The invention relates to a piston ring coated with a coating material by a thermal spray process, exposed to heat treatment of the coating material at an elevated temperature and for a time effective to at least partially diffuse the coating material into the piston ring surface or underlying layer of coating material, and an additionally applied coating material layer subject to successive heat treatments of each coating material layer in order to lay down on the piston ring surface a plurality of layers of the same coating material.
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