304不锈钢/Q235钢的多面约束装药爆炸焊接

为了提高爆炸焊接中炸药的能量利用率,使用了蜂窝铝结构乳化炸药和在蜂窝铝结构乳化炸药上端布置覆盖板的多面约束装药方式。蜂窝结构及覆盖板的多面约束减弱了空气中稀疏波对炸药爆轰的影响,降低了炸药爆轰的临界直径,提高了炸药对复板的做功能力。以304不锈钢板和Q235钢板分别作为复板和基板,进行了多面约束装药和普通乳化炸药裸露装药的对比爆炸焊接试验,并采用格尼模型对爆炸焊接窗口和覆盖板对复板碰撞速度的影响进行了理论分析。结果表明,与传统爆炸复合技术相比,结合质量明显提高,并且炸药使用量减小了50%,炸药能量利用率显著提高。而复板碰撞速度随着覆盖板质量的增加而增加,但增加率降低。此外,得到了爆炸焊接窗口并对焊接质量进行了预测,实验和预测结果吻合良好。

Explosive Welding of 304 Stainless Steel to Q235 Steel with Multidimensional Constraint Charge

To improve the energy utilization ratio of explosives in explosive welding, the honeycomb aluminum structure emulsion explosive and the multidimensional constraint charge way of cover plate arranged on the upper end of honeycomb aluminum structure emulsion explosive were used. The multidimensional constraint of honeycomb structure and cover plate weakens the effect of rarefaction wave in air on the detonation of explosive, reduces the critical diameter of explosive detonation and improves the work ability of explosive driving flyer plate.Taking 304 stainless steel and Q235 steel as flyer plate and base plate respectively, the contrastive explosive welding tests of multidimensional constraint charge and bare charge of ordinary emulsion explosive were carried out. The explosive welding window and the influence of the cover plate on the impact velocity of the flyer plate were theoretically analyzed by Gurney model. Results show that compared to the existing explosive welding technology, the bonding quality is obviously improved and the consumption of explosives is reduced by 50% and the energy utilization ratio of explosives is significantly improved. The impact velocity of the flyer plate increases with the increase of the quality of the cover plate, but the increase rate decreases. In addition, the explosive welding window is obtained and the welding quality is predicted, and the experimental results are in good agreement with predicted ones.