激光烧结成形结合熔渗制备钨铜射孔弹药型罩

High-performance shaped charge liner of W-Cu perferative bond manufactured by laser sintering of W-Cu powder infiltrating

选用形貌规则、多面体的还原钨粉与电解铜粉为原料,通过激光烧结制备钨铜药型罩骨架,在1 150℃、氢气保护下渗铜,获得钨铜射孔弹药型罩。采用X射线衍射(XRD)和扫描电镜(SEM)等测试手段进行分析表征,研究激光功率与扫描速率的影响,通过打靶实验考察药型罩的穿深性能,并与普通模压法制备的钨铜射孔弹药型罩进行对比。结果表明,通过激光烧结可获得密度分布均匀的钨铜药型罩骨架,高温渗铜后得到接近全致密且密度分布均匀的钨铜药型罩;用此药型罩制备的89型射孔弹表现出优异的穿深性能,其平均穿深可以达到964 mm,较普通模压药型罩制备的射孔弹穿深性能提高52%。

Using polyhedrons’ tungsten powder and electrolytic copper powder as raw material,the skeleton of the shaped charge liner was prepared via laser sintering,and followed by infiltrating with copper at 1 150 ℃ and H2 atmosphere to achieve the W-Cu perforating bomb’s shaped charge liner.And then XRD,SEM and so on were utilized for analyzing and characterzing.The results show that the shaped charge liner skeleton with density distributing homogeneously are produced by laser sintering.The density of laser sintered W-Cu alloy could not reach to full densification due to the limited liquid copper content in W-Cu composite powder without pressing exerted on the powder.However,the densification has increased to full density by the followed combinative infiltrating.By using theis technique,W-Cu shaped charge liner exhibits uniform density from the top to bottom compared with conventional mould pressing sample.Moreover,the target practice of the perferative bomb made of laser sintering-infiltratration technology shows that the prepared perforating bomb possesses on average penetration depth of 964 mm,which is 52% higher than that of the conventional mould pressing sample.