Refractory Metal Liner Processing for M242 Medium Caliber Barrels

Abstract

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Processing of Composite Gun Tubes with GLEEM and Hammer Forging

“…The bond between the liner and gun tube is provided by the action of residual radial stress on the liner and friction between the liner and the gun tube. In test firings of a truncated M242 25-mm gun tube, the bond strength produced by the GLEEM process between a Stellite 25 liner and the steel tube was insufficient to prevent a small amount of liner displacement [5]. Other means were sought to strengthen the bond.…”

Processing of Niobium-Lined M240 Machine Gun Barrels

“…The primary goal of this work is to extend the useful service life of Army gun tubes. The early research centered on explosive bonding of these liners, [1][2][3][4][5][6][7][8] and later work [9][10][11][12] explored a new process called Gun Liner Emplacement with an Elastomeric Material (GLEEM). This is a process by which the liner is pressed against the gun tube wall with a pressurized elastomeric material, thus forming a frictional bond between the gun tube and the liner.…”