Thermally applied coating of mechanically alloyed powders for piston rings
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United States of America Patent
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May 3, 2005
Grant Date -
Sep 25, 2003
app pub date -
Aug 17, 2001
filing date -
Sep 21, 2000
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Abstract
The invention relates to a wear-resistant coating used for bearing surfaces and flanks of piston rings in internal combustion engines. The wear-resistant inventive coating is obtained by mechanically alloying powders which form a metallic matrix with hard material dispersoids and lubricant material dispersoids. The coating is then thermally applied to the workpieces, especially by means of high velocity oxygen fuel spraying (HVOF). The workpieces coated are bearing surfaces and parts of flanks pertaining to piston rings in internal combustion engines.
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