Patent ID: 9546837
Date: 2017-01-17
CPC Classifications: F41A

Claim:
1. A coated steel gun barrel comprising a metallic coating on at least a portion of the inner surface of the gun barrel, the coating further comprising a layer, the layer comprising: a) a first metallic component selected from the group consisting of tantalum (Ta), niobium (Nb), zirconium (Zr), rhenium (Re), hafnium (Hf), tungsten (W) and combinations thereof; and b) a second metallic component which is molybdenum (Mo) wherein in the layer the average amount of molybdenum is greater than or equal to 10 wt %, the average amount of the first metallic component is greater than the amount of molybdenum and the total weight percentage of the first metallic component and molybdenum is greater than or equal to 95 wt % and the layer comprises at least 95% of a solid solution phase comprising the first metallic component and molybdenum and wherein a transition region is formed between the coating and the inner surface of the gun barrel, the thickness of the transition region being 5 micrometers or less.