本发明公开了一种大长径比钨铜棒材的制备方法,依次经备料、成型、脱脂、烧结、熔渗和磨削而制成。本发明采用干袋式冷等静压的成型方式,可以得到直径在3-10mm,长度在300mm以上的大长径比的钨棒坯；通过在舟皿底部并排铺满纯钨细棒的方式来固定绕有铜丝的钨棒材,保证了熔渗后的钨铜棒材的直线度,省去了校直工序,减少了后续机加工量；通过优化钨骨架烧结工艺和熔渗工艺,得到高钨含量的大长径比钨铜棒材,致密度高,组织均匀性好,且整个制备流程短,成本低。

The present invention discloses a method of preparing tungsten-copper rods with large aspect ratio, which are made by preparing, forming, degreasing, sintering, fusion infiltration and grinding in sequence. By laying pure tungsten rods side by side at the bottom of the vessel, the tungsten rods with copper wire are fixed, which ensures the straightness of the tungsten-copper rods after fusion infiltration, eliminates the straightening process and reduces the amount of subsequent machining; by optimizing the tungsten skeleton sintering process and fusion infiltration process, the tungsten-copper rods with high tungsten content are obtained. By optimizing the sintering process of tungsten skeleton and melting process, the tungsten-copper rods with high tungsten content and large aspect ratio were obtained with high density and good uniformity, and the whole preparation process was short and low cost.