Tube having strain-hardened inside coating

Firearms – Barrels – Materials or coatings

Patent

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Details

89 16, 138140, 138153, 427239, 428 36, 428472, 428698, F41C 2102, F41C 2104, F41F 1708

Patent

active

046414509

ABSTRACT:
To manufacture tubes having a wear-resistant inside coating, such as gun barrels, hard material layers are deposited on the barrel and the layers are strain-hardened in their surface area by at least the ratio of the area by which the surface area is reduced by compression divided by the surface area of 0.001 (.DELTA.F/F=1.10.sup.-3) or reducing the area of the layer by 0.1%.

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patent: 4256780 (1981-03-01), Gaerttner et al.
patent: 4419202 (1983-12-01), Gibson
Thornton et al., "Internal Stresses in Metallic Films Deposited by Cylindrical Magnetron Sputtering, Thin Solid Films, No. 64, 1979.
Hoffman et al., "Modification of Evaporated Chroinium by Concurrent Ion Bombardment", J. Vac. Sci. Technol., vol. 17, No. 1, 1980.
Hoffman et al., "Compressive Stress and Inert Gas in Mo Films Sputtered From a Cylindrical-Post Magnetron with Ne, Ar, Kr, and Xe", 3. Vac. Sci. Techn., vol. 17, No. 1, 1980.
Thornton et al., "Internal Stresses in Titahium, Nickel, Molybdenum, and Tantalum Films Deposited by Cylindrical Magnetron Sputtering, J. Vac. Sci. Technol. vol. 14, No. 1, 1977.

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