Ablation Behavior and Microscopic Mechanism of Large-caliber Machine Gun Barrel

doi:10.12382/bgxb.2022.0561

Abstract

Abstract: In order to further explore the ablation mechanism of gun barrels, the ablation morphology and microstructure characteristics of the typical gun made of steel 30SiMn2MoV and the new developed long-life gun made of steel MPS700V were comparatively studied using scanning electron microscopy, transmission electron microscopy and other methods. Based on this, the evolution mechanism of the two ablated steel gun barrels was revealed by comparing the different ablation performances through ignition tests. The microstructure of the two ablated gun barrels showed that three different zones appeared at the crack tip, namely sulfide zone, oxide zone and matrix zone, and that molten amorphous oxides were found in the oxide zone. The thickness of the oxide zone and sulfide zone in MPS700V barrel was less than those in 30SiMn2MoV barrel. The ablation simulation experiments showed that the critical ablation pressure of MPS700V barrel with a diameter of 1-10 mm was more than 30% higher than that of 30SiMn2MoV barrel with the same size. The critical ablation pressure of the chrome-plated MPS700V sample with a diameter of 3.2 mm was more than 39% higher than that of the chrome-plated 30SiMn2MoV sample with the same size. So the anti-ablation performance of MPS700V steel is better than 30SiMn2MoV steel. It was also found that oxides and dendrites were observed both in 30SiMn2MoV steel and MPS700V steel after the ablation simulation tests, which were similar as the structure of the failed gun barrels. By comparing the microstructure, thermodynamics and kinetics characteristics of failed gun barrels and the samples under promoted ignition, it is proposed that the ablation of the gun barrels is caused by the combustion of gun steels in the micro zones on the barrel surface under high-temperature and high-pressure conditions, and the corresponding microstructure evolution model based on micro combustion is proposed.

Key words: barrelfailure, ablationbehavior, promotedignition, microstructure, ablationmechanism

CLC Number:

TJ012.1⁺3

DOU Caihong, JIN Pengfei, CHEN Junyu, WANG Congzhen, LI Jianjun, ZHANG Cheng, ZHANG Cheng, HUANG Jinfeng. Ablation Behavior and Microscopic Mechanism of Large-caliber Machine Gun Barrel[J]. Acta Armamentarii, 2022, 43(9): 2231-2240.

References

［1］李小龙. 速射武器身管材料劣化行为与弹道性能退化机理研究［D］.北京：北京科技大学, 2020.
LI X L.Research on the deterioration behavior of the barrel material of the rapid-fire weapon and the degradation mechanism of ballistic performance［D］.Beijing：University of Science and Technology Beijing, 2020. (in Chinese)
［2］乔自平,李峻松,薛钧.大口径机枪枪管失效规律研究［J］.兵工学报,2015, 36(12): 2231-2240.
QIAO Z P, LI J S, XUE J.Research on the performance decay rule of large caliber machinegun barrel［J］. Acta Armamentarii, 2015, 36(12): 2231-2240. (in Chinese)
［3］ BANNISTER E L.Thermal theory for erosion of guns by propellant gases［C］∥Proceedings of the Interservice Technical Meeting on Gun Tube Erosion and Control. Springfield, VA, US:U. S. Army Weapons Command, 1970.
［4］ TURLEY D M, GUMMING M G, GUNNER A, et al. A metallurgical study of erosive wear in a 105 mm tank gun barrel［J］. Wear, 1994,176(1): 9-17.
［5］ HIRVONEN J K, DEMAREE J D, MARBLE D K, et al.Gun barrel erosion studies utilizing ion beams［J］.Surface and Coatings Technology, 2005, 196(1/2/3):167-171.
［6］ COTE P J, RICKARD C.Gas-metal reaction products in the erosion of chromium-plated gun bores［J］. Wear, 2000, 241(1):17-25.
［7］ COTE P J, TODARO M E, KENDALL G, et al. Gun bore erosion mechanisms revisited with laser pulse heating［J］.Surface and Coatings Technology, 2003,163/164:478-483.
［8］ KAMDAR M H, VENABLES J. Characterization of bore surface layers in gun barrels［R］.New York，NY，US:Army Armament Research and Development Center, 1984.
［9］ MEN X D, TAO F H, GAN L, et al. Erosion behaviour of cobalt-based coatings with different carbide contents under high-speed propellant airflow［J］. Surface Engineering, 2020, 36(11): 1210- 1218.
［10］ MOELLER C E, BASSERT A J. Measurement of transient bore-surface temperatures in 7.62 mm gun tubes:AD-780938［R］.Springfield, VA, US:U. S. Army Weapons Command, 1973.
［11］ LAWTON D B. The influence of additives on the temperature, heat transfer, wear, fatigue life, and self ignition characteristics of a 155 mm gun［J］. Journal Pressure Vessel Technology, 2003, 125: 315-320.
［12］ QU P, LI Q, YANG S F. Temperature field and thermal stress analysis of large caliber gun barrel［J］. Applied Mechanics and Materials, 2014, 518: 150-154.
［13］ JOHNSTON I A.Understanding and predicting gun barrel erosion:DSTO-TR-1757［R］.Edinburgh，Australia:Defence Science and Technology Organization Edinburgh (Australia), 2005.
［14］ LI X L, ZANG Y, MU L, et al. Erosion analysis of machine gun barrel and lifespan prediction under typical shooting conditions［J］. Wear, 2020, 444-445: 203177.
［15］ MROWEC S, WALEC T, WERBER T. High-temperature sulfur corrosion of iron-chromium alloys［J］. Oxidation of Metals, 1969, 1(1): 93-120.
［16］ CHEN R Y, YEUN W Y D. Review of the high-temperature oxidation of iron and carbon steels in air or oxygen［J］. Oxidation of Metals, 2003, 59(5): 433-468.
［17］黄进峰.枪炮身管损伤行为与机理［M］.北京：科学出版社, 2022.
HUANG J F. Damage behavior and mechanism of gun barrel［M］. Beijing:Science Press, 2022. (in Chinese)
［18］ MONROE R W, BATES C E, PEARS C D. Metal combustion in high-pressure flowing oxygen［C］∥Proceedings of the symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres. Philadelphia, PA , US: ASTM, 1983: 126-149.
［19］ MCILROY K, MILLION J, ZAWIERUCHA R. Promoted ignition-combustion behavior of carbon steel in oxygen gas mixtures［C］∥Proceedings of the 6th International Symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres. Philadelphia, PA , US:ASTM, 1993: 97-97.
［20］ BENZ F J, STOLTZFUS J M. Ignition of metals and alloys in gaseous oxygen by frictional heating［C］∥Proceedings of the 2nd International Symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres. Philadelphia, PA, US:ASTM, 1986:38-58.
［21］ BENZ F J, WILLIAMS R E, ARMSTRONG D. Ignition of metals and alloys by high-velocity particles［C］∥Proceedings of the 2nd International Symposium on Flammability and Sensitivity of Materials in Oxygen-Enriched Atmospheres. Philadelphia, PA, US:ASTM, 1986: 16-37.
［22］ SHAO L, XIE G L, ZHANG C, et al. Combustion of metals in oxygen-enriched atmospheres［J］. Metals, 2020,10(1): 128.
［23］ HUST J G, CLARK A F.A survey of compatibility of materials with high pressure oxygen service［J］. Cryogenics, 1973,13:325- 336.
［24］ BOLOBOV V I. Conditions for ignition of iron and carbon steel in oxygen［J］. Combustion. Explosion Shock Waves, 2001, 37(3): 292-296.
［25］ DOU C H, ZHANG C, WANG C Z, et al. Combustion characteristics and mechanisms of two gun barrel steels by promoted ignition combustion［J/OL］.Combustion Science and Technology, 2021.(2021-11-09).https:∥doi.org/10.1080/00102202.2021.2008918.
［26］高海霞,黄进峰,张济山,等.速射武器身管用钢的白层形成及剥落机制［J］.金属热处理, 2008(10): 109-113.
GAO H X, HUANG J F, ZHANG J S, et al. Formation and spalling off mechanism of white layer of rapid-firing gun steel［J］. Heat Treatment of Metals, 2008(10): 109-113.
(in Chinese)
［27］ Standard Test Method for determining the combustion behavior of metallic materials in oxygen-enriched atmospheres:ASTM A. G124-10［S］. West Conshohocken, PA,US: ASTM, 2010.
［28］ SHAO L, LI Z B, YU J B, et al. Combustion behavior and mechanisms of Ti2AlNb compared to an α+β Ti alloy［J］. Corrosion Science, 2021, 192: 109868.
［29］ STEINBERG T A, MULHOLLAND G P, WILSON D B, et al. The combustion of iron in high-pressure oxygen［J］. Combustion and Flame, 1992, 89: 221-228.
［30］陈肖玮. 膛线结构参数对身管温度场和烧蚀的影响研究［D］.太原：中北大学,2021.
CHEN X W. Research on the influence of rifling structure parameters on the temperature field and ablation of the barrel［D］.Taiyuan:North University of China, 2021. (in Chinese)
［31］孙全兆.大口径榴弹炮弹带挤进动力学研究［D］.南京：南京理工大学, 2016.
SUN Q Z.Study on dynamics of rotating band engraving for large caliber howitzers［D］.Nanjing：Nanjing University of Science and Technology, 2016. (in Chinese)

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