Electric heating – Metal heating – By arc
Patent
1997-01-30
1999-04-27
Mills, Gregory L.
Electric heating
Metal heating
By arc
21912135, 228107, B23K 1500
Patent
active
058977945
ABSTRACT:
A method and apparatus for bonding a layer of coating or cladding material onto a substrate with minimal bulk heating of the substrate. A pulsed electron beam generator is used to produce high energy electrons at the beginning of the pulse and a larger number of lower energy electrons at the end of the pulse. A thin sacrificial or ablative layer of an easily-vaporized material such as tin is placed on top the coating. The high energy electrons penetrate through the ablative and coating layers and heat the coating-substrate interface. The ablative layer is then heated by the low energy electrons to a much higher temperature, causing it to vaporize. The ablation process generates a force on the coating layer which drives it into the substrate.
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Fisher Amnon
Hubbard Richard F.
Karasek John J.
McDonnell Thomas E.
Mills Gregory L.
The United States of America as represented by the Secretary of
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