Research on the Performance Decay Rule of Large Caliber Machinegun Barrel

doi:10.3969/j.issn.1000-1093.2015.12.004

Abstract

Abstract: In order to study the erosion rule of large caliber machinegun barrel in lifetime and find out the determinants of barrel life, the life test was done on two barrels made of different materials. The fundamental cause of the ellipse shot holes due to the erosion of the forth and fifth tapers are found out by analyzing the relations among the barrel life and the changes of bore land diameter and bore surface topography, accuracy and dispersion, decreased rate of muzzle velocity and number of ellipse shot holes, which results in the different life of two barrels; when firing 1 200 shots, the chrome layer in the fifth taper of bore fell off, the bore diameter measured by gauge can’t reflect barrel performance, but the barrel life is determinated by the changing of land diameter in the rear of barrel.

Key words: ordnance science and technology, barrel, life test, bore, life, erosion

CLC Number:

TJ10

QIAO Zi-ping， LI Jun-song， XUE Jun. Research on the Performance Decay Rule of Large Caliber Machinegun Barrel[J]. Acta Armamentarii, 2015, 36(12): 2231-2240.

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