Patent ID: 9382606
Filing Date: 2016-07-05
CPC Classification: B22D,C22C,C23C,Y10T

Claim Text:
1. A metallic article comprising: a body having a hardened and abrasion resistant surface, the body made of a binary alloy consisting of zirconium and titanium, the binary alloy including between 18.4% to 65.6% of zirconium by atomic weight; a protective darkened color oxide layer containing ZrO heating the body in an oxygen containing atmosphere supplied at a controlled flow rate at a heating temperature of between about 250 and about 880° C. and for a duration of between 10 to 110 minutes; wherein the darkened color oxide layer is on a monochromatic color scale of dark grey to black; wherein when the heating temperature is between about 480° C. and about 880° C. and the duration is between about 10 and about 70 minutes, the protective darkened color oxide layer has a black color; and wherein when the heating temperature is between about 250° C. and about 480° C. and the duration is between about 25 and about 70 minutes, the protective darkened color oxide layer has a grey color; and the metallic article having a polished satin or matte finish.