浇注型PBX炸药的打印成型及其爆炸性能  

Print Forming and Explosive Performance of Castable PBX Explosive

作　　者：吴鑫洲 邓玉成 邓鹏[1] 焦清介[1] 任慧[1] WU Xin-zhou;DENG Yu-cheng;DENG Peng;JIAO Qing-jie;REN Hui(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,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

出　　处：《火炸药学报》2022年第3期404-411,共8页Chinese Journal of Explosives & Propellants

基　　金：军科委项目。

摘　　要：为了将增材制造技术应用到炸药成型制备中,解决常规手段难以实现的战斗部装药多样化、异形化发展问题,选用3D直写工艺和自动点胶机,完成HMX和HMX/Al药柱的打印成型;使用流变仪测试了不同固含量对打印浆料流变性能的影响,并优化打印参数;对打印出的药柱进行了热分解性能、微观形貌及爆轰性能测试。结果表明,固含量80%~87.5%的浆料均具有剪切变稀效果,符合假塑性流体的特征,满足打印需求;使用黏合剂GAP/N100配置成浆料以及铝粉的加入使HMX的热分解峰温从288.2℃分别提前到244.4℃和235.5℃;HMX浆料溶剂质量保持在5~6g、打印压力8~13psi,HMX/Al浆料溶剂质量保持在2~3g、打印压力10~16psi,打印速率设置为10mm/s时成型效果较好;3D打印成型的药柱无明显的裂纹和孔隙,HMX药柱平均密度为1.67g/cm^(3),爆速均值达7662.9m/s;HMX/Al药柱的平均密度为1.72g/cm^(3),爆热均值达到7359.41kJ/kg。In order to apply additive manufacturing technology to explosive forming and preparation,and solve the problem of diversification and abnormity of warhead charge which is difficult to be realized by conventional means,the 3D direct writing process and automatic dispensing machine were used to complete the printing and forming of HMX and HMX/Al samples.Rheometer was used to test the effect of different solid contents on the rheological properties of the printed slurry,and the printing parameters were optimized.The thermal decomposition properties,microstructure and detonation properties of the printed grain were tested.The results show that the slurry with solid content of 80.0%—87.5%has the effect of shear thinning and the characteristics of composite pseudoplastic fluid,which can meet the printing requirements.The decomposition peak temperatures of HMX is advanced from 288.2℃to 244.4℃and 235.5℃respectively by using GAP/N100 as binder slurry and adding aluminum powder.When the solvent of HMX slurry is 5—6g,the printing pressure is 8—13psi,and the solvent of HMX/Al slurry is 2—3g,the printing pressure is 10—16psi,and the printing rate is 10mm/s,the forming effect is good.There are no obvious cracks and pores in the 3D printed grain.The average density of HMX grain is 1.67g/cm^(3),and the average detonationn velocity is 7662.9m/s.The average density of HMX/Al is 1.72g/cm^(3),and the average heat of explosion is 7359.41kJ/kg.

关 键 词：物理化学 增材制造 3D直写工艺 PBX炸药 油墨直写工艺 HMX 高爆速 爆热 

分 类 号：TJ55[兵器科学与技术—军事化学与烟火技术] O38[理学—流体力学]