增材制造316L不锈钢球形破片的弹道性能  

Ballistic Performance of Additively Manufactured 316L Stainless Steel Spherical Fragments

作　　者：薛浩 王涛[1] 黄广炎[1,2] 崔欣雨 韩洪伟 XUE Hao;WANG Tao;HUANG Guangyan;CUI Xinyu;HAN Hongwei(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Chongqing Innovation Center of Beijing Institute of Technology,Chongqing 401120,China;Unit 31002 of PLA,Beijing 100094,China)

机构地区：[1]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [2]北京理工大学重庆创新中心,重庆401120 [3]31002部队,北京100094

出　　处：《兵工学报》2024年第2期395-406,共12页Acta Armamentarii

基　　金：国家重点研发计划项目(2020YFC0826804);国家自然科学基金项目(11772059)。

摘　　要：为探索增材制造316L不锈钢球形破片的弹道性能,采用选择性激光熔化(Selective Laser Melting,SLM)技术制造316L不锈钢材料毛坯,通过机加工、抛光等操作得到了直径12 mm的增材制造316L不锈钢球形破片。开展打印态316L不锈钢材料的显微计算机断层扫描(Computed Tomography,CT)和静动态力学试验研究,获得了打印态316L不锈钢在材料沉积方向的Johnson-Cook(JC)模型参数,进行了增材制造和传统冷轧工艺制造的316L不锈钢球形破片侵彻6 mm厚Q235钢靶的弹道试验。研究结果表明:增材制造球形破片的弹道极限速度比传统冷轧制造破片低2.5%左右,弹道性能有小幅提升,暗示了增材制造工艺用于制造战斗部预制破片的潜力;开展的数值仿真研究获得了与试验结果一致的剪切冲塞穿靶机理,仿真与试验穿靶速度数据比较吻合,弹道极限速度误差仅为1.4%左右,仿真结果也表明JC模型用于描述增材制造316L不锈钢材料穿靶行为的可行性。The ballistic performance of additively manufactured 316L stainless steel(AM SS316L)spherical fragments is explored in this study.The SS316L blanks are printed by using selective laser melting(SLM)technology.AM SS316L spherical fragments with 12 mm diameter are obtained by the machining and polishing processes.The micro-computed tomography(CT),static and dynamic mechanical tests of the as-built SS316L are conducted,and Johnson-Cook(JC)material parameters in the material deposition direction are obtained for SS316L materials.Hereafter,the ballistic test of AM and traditional cold-rolled SS316L fragments penetrating a 6.0 mm-thick Q235 steel target is carried out.The test results show that the ballistic limit velocity of AM SS316L spherical fragments is lower than 2.5%than that of the cold-rolled fragments and its ballistic performance is slightly improved,indicating the potential of the AM technology in fabricating the pre-formed fragments.Finally,the numerically simulated results show a shear plugging mechanism consistent with experimental results.The simulated and test velocity perforation data have a good agreement,and the ballistic limit velocity error is only about 1.4%.At the same time,the simulated results also show that the JC model can be used to describe the perforation behaviors of AM SS316L materials.

关 键 词：球形破片 弹道性能 316L不锈钢 增材制造 

分 类 号：TJ410.3[兵器科学与技术—火炮、自动武器与弹药工程]