Process of forming a metallic article having a black oxide/ceramic surface and articles produced by the method

   
   

A process for forming a metallic article having a black ornamental surface includes the steps of metallurgically providing an alloy containing between about 51 and 70 about percent by weight of titanium, between about 3 and about 17 percent by weight of niobium, and the balance of a metal selected from the group consisting of zirconium, tantalum, molybdenum, hafnium zirconium, chromium, and mixtures thereof. The alloy is then casted and/or metal worked into a workpiece having a desired geometry and surface texture. The workpiece thereof is then baked in a kiln or oven in a substantially air atmosphere of between about 450 and about 850 degrees C. for a period of between about one and about 29 minutes. Resultant of such baking, there is produced a durable black surface layer consisting substantially of an oxide of niobium which is adhered to the substrate of the workpiece which remains unoxidized.

Un proceso para formar un artículo metálico que tiene una superficie ornamental negra incluye los pasos metalúrgico de proporcionar una aleación que contiene entre cerca de 51 y 70 sobre por ciento en peso de el titanio, entre cerca de 3 y cerca de 17 por ciento en peso de el niobium, y el equilibrio de un metal seleccionado del circonio del grupo, del tantalio, del molibdeno, del circonio del hafnium, del cromo, y de las mezclas que consisten en de eso. La aleación es entonces casted y/o metal trabajado en un objeto que tiene una geometría y una textura deseadas de la superficie. El objeto de eso entonces se cuece al horno en un horno o un horno en substancialmente una atmósfera del aire de entre cerca de 450 y cerca de 850 grados de C. para un período de entre cerca de uno y cerca de 29 minutos. El resultado de tal hornada, allí se produce una capa superficial negra durable que consiste substancialmente en un óxido del niobium que se adhiere al substrato del objeto que sigue siendo sin oxidar.

 
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