Noveske rifleworks extreme duty machine gun barrel

Abstract

An improved method for producing barrels which need to operate at temperatures exceeding 800 degrees for prolonged periods of time. The method described is ideally suited for barrels which are a part of a crew served weapons, belt feed systems or other fully automatic weapons. My method has limited effect on the accuracy potential of the barrel produced and therefore should not be excluded from use on shoulder fired weapons and precision rifles.

1 . A method for creating a firearm barrel with a surface hardness comprising a coating and surface hardness which is harder than the sub surface of the barrel:
 a. providing a steel suitable for a firearm barrel which is capable of bonding with salt nitride, and   b. providing a manufacturing process which will prepare the interior of a firearm barrel to be coated with salt nitride, and   c. initial heat treat of the firearm barrel prior to salt nitride coating, and   d. salt nitride coating the firearm barrel after said heat treating,   
       Whereby said barrel is highly resistance to corrosion, erosions from heat and warping due to extended duty cycles. 
     
     
         2 . A method for creating a firearm barrel with a surface hardness comprising a coating and surface hardness which is harder than the sub surface of the barrel as set forth in  claim 1 , wherein said firearm barrel is machined from 4130, 4140, 4150, 416 stainless, 17-4 stainless or H13 tool steel. 
     
     
         3 . A method for creating a firearm barrel with a surface hardness comprising a coating and surface hardness which is harder than the sub surface of the barrel as set forth in  claim 1 , wherein said manufacturing process provides a means for lapping said barrel with a lead lap impregnated with aluminum oxide particle, 
     
     
         4 . A method for creating a firearm barrel with a surface hardness comprising a coating and surface hardness which is harder than the sub surface of the barrel as set forth in  claim 1 , wherein said initial heat treat process hardens the barrel to HRC 50-55 
     
     
         5 . A method as set forth in  claim 1 , wherein said salt nitride provides a heat treat and surface coating which is harder than said initial heat treat 
     
     
         6 . The method for creating a firearm barrel with a surface hardness comprising a coating and surface hardness which is harder than the sub surface of the barrel as set forth in claim  5 , wherein said salt nitride provides a surface coating consisting of carbon and nitrogen commonly referred to as Melonite. 
     
     
         7 . The method for creating a firearm barrel with a surface hardness comprising a coating and surface hardness which is harder than the sub surface of the barrel as set forth in  claim 5 , wherein said salt nitride serves as a heat treat process for the surface and immediate sub surface of the barrel providing a temper of HRC of 68-72. 
     
     
         8 . The method for creating a firearm barrel with a surface hardness comprising a coating and surface hardness which is harder than the sub surface of the barrel as set forth in  claim 7 , wherein said salt nitride serves as a heat treat process and coating effectively creating a surface layer of steel which is harder than the center of the firearm barrel.