低压热处理对PBX炸药件密度及内部质量的影响

Effects of Low-pressure Heat Treatment on Charge Density and Inner Quality of PBX

高聚物粘结炸药(PBX)时效处理会造成炸药件尺寸长大,密度降低,甚至可能扩大裂纹和分层等初始缺陷。为了解决以上问题,开展成型炸药件低压热处理研究。将炸药件放入等静压后处理机,在恒定温度下施加5～10MPa压力,保压2～4h,处理1～3次。实验结果表明:采用这种后处理方法能在短时间内有效释放PBX炸药件内应力,相对密度从96.53%～98.83%提高到99%以上,并能抑制长大,改善炸药件内部质量。

In order to study the low-pressure heat treatment on density and inner quality of pressed PBX, pressed PBX specimens were treated in isostatic pressing machine with pressure range of 5 - 10 MPa for 2 - 4 hours and repeated for 1 - 3 times. The properties of pressed PBX before and after treatment were compared. Results show that low-pressure heat treatment releases internal stress, increases relative density of PBX from 96.53% -98.83% to more than 99% , improves inner quality, and restrains growth of pressed PBX charges.