摘要
借助用 5 3式 7.6 2 mm WO- 10 9C穿甲燃烧弹垂直撞击 10 mm厚、硬度为 HRC44～ 5 6的Cr- Ni- Mo装甲钢板的穿甲试验研究了高硬度及超高硬度状态下硬度对装甲钢板抗弹性能的影响。观察分析弹坑形貌发现 ,装甲钢板材料力学性能的改变导致了穿甲机理的变化。一方面 ,硬度升高 ,增加弹丸开坑所消耗的能量 ,提高弹丸消耗的塑性扩孔功 ,且当硬度超过一定值时 ,弹丸可能发生破碎 ,从而有利于抗弹性能的提高。另一方面 ,硬度升高 ,导致绝热剪切临界失稳应变降低 ,易诱发冲塞破坏 ,而且塑性与韧性降低 ,可能导致背面盘状崩落破坏 ,从而使抗弹性能下降。在本试验弹靶体系下 ,上述两方面相反作用的结果导致装甲钢板背面强度极限基本上不随硬度变化而改变。
The ogive shaped 7.62 mm diameter armor piercing projectiles were fired at Cr Ni Mo armor steel plates having hardness in the range of HRC44～56 with thickness of 10 mm by ballistic gun. The influence of hardness on the ballistic behavior of armor steel plates was investigated at high and ultra high hardness range. By observing and analyzing the craters, it was found that the perforation mechanism varied with properties of the armor steel plate. With the increase of the plate hardness, the ballistic penetration, on one hand, is improved due to the increase of the energy needed in the beginning of penetration and the work for ductile hole enlargement. When the hardness arrived at a certain value, the cracking of the projectiles may occur. On the other hand, the decrease of the critical strain for adiabatic shear with the increase of the plate hardness easily leads to the damage of plugging, and the decrease of the ductility and toughness, which may cause the damage of discing resulting in the decrease of the ballistic penetration. The ballistic limit has little change with the varying of armor steel plate hardness in the present penetration test condition because of above opposite effects.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2000年第3期36-41,共6页
Journal of Iron and Steel Research
关键词
装甲钢
硬度
抗弹性能
穿甲柚是
背面强度极限
armor steel
hardness
ballistic penetration perforation
ballistic limit
