爆炸压实CuCr合金过程中的能量与变形

根据爆炸冲击能分为钢管变形能和粉末压实能两部分,爆炸冲击能由钢管动能计算给出,而钢管变形能由钢管的实际变形程度决定,由此得到爆炸压实CuCr合金过程中能量与变形之间的关系.结果表明,采用爆炸压实工艺制备了相对理论密度92%以上的CuCr触头材料;随着冲击能的增加,粉末压实能同步增加,而钢管变形量和变形能几乎不变.因此,炸药量太多,粉末压实能也就太多,反而发生马赫反射,导致爆炸坯密度降低.

Energy and deformation during explosive compaction of CuCr alloys

The explosive impact energy is composed of the tube deformation energy and the powder compact energy. The impact energy is calculated by means of the kinetic energy of the steel tubes, while the deformation energy is dependent on the real deformation extent of the steel tubes. The relationships between the energy and the deformation during explosive compaction of CuCr alloys have been found. The results show that, with the rise of the impact energy, the compact energy increases synchronously, while the deformation energy and deformation extent of the tubes hardly change. If the explosive mass is too large, the compact energy is so large that the formation of the "Mach" reflection takes place, resulting in the compaction billets with low densities.