Research on Friction Behavior of Self-lubricating Steel of Bullet Jacket

doi:10.3969/j.issn.1000-1093.2018.12.019

Abstract

Abstract: In order to reduce the frictional wear of barrel bore and enhance the lifetime of gun barrel, a method of pin-on-disc friction mode is used to simulate the friction between bullet jacket and barrel bore. The friction surfaces of disc and pin are characterized by using scanning electron microscope and optical profilometer, respectively. The friction behaviors of regular bullet jacket material and self-lubricating bullet jacket steel on Cr layer are investigated, and the mechanism of self-lubrication is discussed. Results show that, for the regular bullet jacket material with increased hardness (from 161 to 227HV0.2), the frictional coefficient decreases slowly (around 11%) at room temperature and varies slightly at 700 ℃, indicating that the increase in hardness is not an effective way to decrease the frictional coefficient. When S and Pb are added into the ultra-low carbon steel (223HV0.2), the solid lubricants of sulfide and Pb can be formed, resulting in reducing the frictional coefficient by 25% at room temperature and 23%-34% at 700 ℃, which effectively reduces the friction wear of Cr layer. Key

Key words: gunbarrel, bulletjacket, bulletjacketsteel, self-lubricating, frictionalcoefficient, Crlayer

CLC Number:

HU Chun-dong, DONG Han, ZHAO Hong-shan, XIANG Duo-lun, WANG Jun-hong, LI Jun-song. Research on Friction Behavior of Self-lubricating Steel of Bullet Jacket[J]. Acta Armamentarii, 2018, 39(12): 2450-2458.

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第39卷第12期
2018 年12月兵工学报ACTA
ARMAMENTARIIVol.39No.12Dec. 2018

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