本发明公开了一种多功能钨合金梯度材料及其制备方法。所述多功能钨合金梯度材料按照从所述材料的一端到另一端的方向,包括两个材料段,前段材料由钨和金属添加剂组成,其中钨重量百分比范围为93-98％；后段材料由钨和金属添加剂组成,其中钨重量百分比范围为88-93％,且前段材料的钨含量大于后段材料的钨含量。根据应用需求,要求前段具有较高强度,后段具有较高韧性。所述多功能钨合金梯度材料的制备方法包括：钨合金粉料的制备步骤,压制成型步骤,烧结步骤和热处理步骤。本发明制备出的钨合金梯度材料,具有良好的综合力学性能。

The invention discloses a functionally gradient tungsten alloy materials and preparation method.The functionally gradient tungsten alloy comprises two materials sections along from one end to the other end of the specimen, the former consisting of tungsten and metal additives, in which the tungsten weight percentage ranges from 93 to 98 %. The latter material is composed of tungsten and metal additives, in which the weight percentage of tungsten ranges from 88 % to 93 %, and the tungsten content of the former material is higher than that of the latter material. According to the application requirements, the front segment is required to have high strength and the back segment has high toughness. The preparation methods of multifunctional tungsten alloy gradient materials include preparation steps of tungsten alloy powder, pressing forming steps, sintering steps and heat treatment steps. The tungsten alloy gradient material prepared by the invention has good comprehensive mechanical properties.