NICKEL PLATED ZINC ALLOYS FOR COINAGE

A lower melting point metal substrate such as zinc is covered with a higher melting point metal layer such as nickel. In order to render the nickel layer suitable for coining without cracking, it is quickly annealed with a burst of induction heat. The induction heat is limited so that only the metal...

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Bibliographic Details
Main Authors DELSORBO, CARL R, BEETS, RANDY, RAUCH, WILLIAM L
Format Patent
LanguageEnglish
French
Published 15.11.2022
Subjects
BRACELETS
COINS
HABERDASHERY
HUMAN NECESSITIES
JEWELLERY
OTHER PERSONAL ADORNMENTS
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Summary:A lower melting point metal substrate such as zinc is covered with a higher melting point metal layer such as nickel. In order to render the nickel layer suitable for coining without cracking, it is quickly annealed with a burst of induction heat. The induction heat is limited so that only the metal layer is heated without allowing substantial heat transfer to the metal substrate. This protects the metal substrate from any substantial melting, deformation or warping and maintains the metal substrate substantially intact and without a change in properties and shape. L'invention concerne un substrat métallique à point de fusion inférieur, tel que du zinc, qui est recouvert d'une couche métallique à point de fusion supérieur, telle que du nickel. Afin d'obtenir la couche de nickel appropriée pour le monnayage, sans fissure, elle est recuite rapidement à l'aide d'une vague de chaleur par induction. La chaleur par induction est limitée de telle sorte que seule la couche métallique est chauffée, en empêchant un transfert de chaleur sensible au substrat métallique. Cela protège le substrat métallique de toute fusion, déformation ou gauchissement sensible, et maintient le substrat métallique sensiblement intact sans changement des propriétés et de la forme.
Bibliography:Application Number: CA20142931002