COMPOSITIONS AND METHODS FOR DETERMINING ALLOYS FOR THERMAL SPRAY, WELD OVERLAY, THERMAL SPRAY POST PROCESSING APPLICATIONS, AND CASTINGS
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United States of America Patent
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Issued Date -
May 1, 2014
app pub date -
Oct 18, 2013
filing date -
Sep 17, 2009
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Abandoned
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Abstract
Disclosed herein are iron-based alloys having a microstructure comprising a fine-grained ferritic matrix and having a 60+ Rockwell C surface, wherein the ferritic matrix comprises <10 μm Nb and W carbide precipitates. Also disclosed are methods of welding comprising forming a crack free hardbanding weld overlay coating with such an iron-based alloy. Also disclosed are methods of designing an alloy capable of forming a crack free hardbanding weld overlay, the methods comprising the steps of determining an amorphous forming epicenter composition, determining a variant composition having a predetermined change in constituent elements from the amorphous forming epicenter composition, and forming and analyzing an alloy having the variant composition.
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