压力对DNAN凝固过程的影响
DOI:
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

TJ55

基金项目:


Effect of Pressure on DNAN Solidification Process
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 资源附件
  • |
  • 文章评论
    摘要:

    为指导DNAN基熔铸炸药凝固工艺优化设计,采用自制的多点加压凝固测试装置测试了DNAN在0.6,0.3MPa和常压下凝固过程的温度变化和凝固速率;用工业CT和扫描电镜观测了试样的缺陷分布情况;用密度仪测试了试样的装药密度。试验结果显示,随着压力的升高,DNAN的过冷度和凝固速率均逐渐增大;在DNAN装药体中的,凝固产生的体积收缩更多的集中于装药体上部,而装药体下部中的弥散性缺陷得到了显著降低;DNAN晶粒生长的有序度得到提高,晶粒间空隙逐渐减少,装药相对密度由95.1%提高到了 96.7%。上述研究表明,压力作用对DNAN的凝固过程影响较为明显,施加较低的压力即可有效提升装药质量。

    Abstract:

    In order to optimize the solidification process of DNAN-based melt-casting explosives, the temperature-time curves and solidification rate of DNAN solidification process under 0.6MPa, 0.3MPa and atmospheric pressure respectively were measured by a home-made pressured solidification multi-point type measuring device. The distribution of solidification defect of these solidification samples was observed by industrial CT and SEM, respectively. The charge density of these solidification samples was measured by density instrument. Results show that the undercooling and solidification rate increase gradually with increasing pressure. In DNAN charge, the volume shrinkage caused by solidification is more aggregated in the upper part of charge, while the diffuse solidification defect in the lower part of charge decrease significantly with increasing pressure. The orderliness of DNAN grain growth is improved, the space between grains is gradually reduced, and the relative density of charge increase from 95.1% to 96.7%. These results indicate that DNAN solidification process is significantly affected by pressure. The high quality DNAN charge can be achieved by applying a lower pressure on solidification process.

    参考文献
    相似文献
    引证文献
引用本文

罗一鸣,张蒙蒙,杨斐,等. 压力对DNAN凝固过程的影响[J]. 科学技术与工程, 2020, 20(8): 3048-3052.
Luo Yiming, Zhang Mengmeng, Yang Fei, et al. Effect of Pressure on DNAN Solidification Process[J]. Science Technology and Engineering,2020,20(8):3048-3052.

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2019-06-10
  • 最后修改日期:2019-11-29
  • 录用日期:2019-09-16
  • 在线发布日期: 2020-04-29
  • 出版日期:
×
律回春渐,新元肇启|《科学技术与工程》编辑部恭祝新岁!
亟待确认版面费归属稿件,敬请作者关注