Explosive Bonding of Refractory Metal Liners

Abstract

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Erosion behaviour of cobalt-based coatings with different carbide contents under high-speed propellant airflow

“…These materials are used in barrel weapons to resist the erosion [5,6] and wear [7] of the inner wall of the tube and ensure the performance and service life of the weapon [8][9][10]. For over 50 years, cobalt-based alloys have been used by the United States Army as short liners for M2 machine guns to reduce the erosion and wear of machine gun barrels and improve their service life [11]. In recent years, with the increasing requirements of the barrel weapon performance, the temperature and pressure in gun bore increase and the erosion and wear of the gun barrel become serious, especially in high-pressure and largecaliber guns.…”

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.…”

Refractory Metal Liner Processing for M242 Medium Caliber Barrels

“…To the best of our knowledge, the machining of lands and grooves in a Stellite 25 liner in a medium caliber cannon had never been done. ARES, Inc., Port Clinton, OH, was selected to develop the tooling for this task, based on their success in machining lands and grooves in a tantalum-10% tungsten liner explosively bonded to an M242 gun tube (5,6). Second, while some initial estimates of the bond strength needed to overcome the forces on the liner during actual shooting had showed the bond strength to be sufficient, there had been no actual gun firings of a liner emplaced by the GLEEM process.…”