Modified MCrAlY coatings on turbine blade tips with improved durability
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United States of America Patent
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Jan 8, 2008
Grant Date -
Nov 15, 2007
app pub date -
Mar 2, 2004
filing date -
Mar 2, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
There is provided a method for depositing a modified MCrAlY coating on a turbine blade tip. The method utilizes laser deposition techniques to provide a metallurgical bond between a turbine blade substrate, such as a superalloy substrate, and the modified MCrAlY composition. Further the modified MCrAlY coating has sufficient thickness such that a post-welding grinding operation to size the turbine blade to a desired dimension will not remove the modified MCrAlY coating entirely. The modified MCrAlY coating thus remains on the finished turbine blade tip after grinding.
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