文章基本信息

标题：Plasma Nitriding of Bored Barrels
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作者：Z. Pokorný ; J. Kadlec ; V. Hrubý 等
期刊名称：Advances in Military Technology
印刷版ISSN：1802-2308
电子版ISSN：2533-4123
出版年度：2011
卷号：6
期号：1
语种：English
出版社：University of Defence
摘要：The nitriding behaviour of heat-treated alloyed steel was carried out on two samples with various diameters. The influence of nitriding conditions on the thickness and hardness of nitrided layer were investigated. Bored cylindrical barrels were quenched and subsequently tempered. Plasma nitriding was performed at 500°C for 6 hours with mixture of H2 and N2 in plasma nitriding appliance. The pressure was changed to 4 and 6 mbar. Microstructure and mechanical properties of nitrided layers were characterized using optical spectrometry,laser microscopy,hardness testing. The nitrided depth was also estimated using cross-sectional microhardness profiles. The results of experiments showed that plasma nitriding process is applicable to cavities. Surface hardness of material was significantly increased. The measurements have shown that the pressure of plasma nitriding process has a remarkable influence on the depth of nitriding in cavities,flat surfaces and on the length of nitriding inside cavities,i.e. the distance from muzzle.
关键词：Plasma nitriding;nitrided layer;universal hardness;length of nitriding