本发明公开了一种高强度高塑性钨合金材料及其制备方法，其原料由质量百分比85~97% W、3~15%Fe-Mn-Al-C系预合金以及0~1%Y₂O₃组成，其中Fe-Mn-Al-C系预合金由质量百分比0~33% Mn，5~10% Al，0.5~1.6 % C，余量为Fe的原料。通过真空感应炉熔炼成钢锭后，再经水雾化或气雾化制粉得到。该钨合金材料的制备方法包括以下步骤：（1）球磨混粉；（2）热等静压烧结；（3）烧结后固溶时效处理。本发明的钨合金材料组织为纳米(FeMnAl)3C碳化物粒子强化的奥氏体基体上分布均匀近球形的钨颗粒。纳米碳化物和钨颗粒提供了优异的强度；奥氏体基体提高了塑韧性；Y的加入在烧结过程中抑制钨颗粒的聚集和长大，进一步提供了强韧化作用。本发明的钨合金的特点是强度高和塑性好，热膨胀系数小，耐蚀性好，在民用工业及军事工业中具有广泛的应用前景。

The invention discloses a high-strength and high-plasticity tungsten alloy material and a preparation method thereof. The raw material is composed of 85-97% W, 3-15% Fe-Mn-Al-C series pre-alloy and 0-1% Y₂O₃. Among them, the Fe-Mn-Al-C series pre-alloy is made of 0~33% Mn, 5~10% Al, 0.5~1.6% C by mass percentage, and the balance of Fe. The raw materials are smelted into steel ingots through a vacuum induction furnace. It can be obtained by water atomization or gas atomization. The preparation method of the tungsten alloy material includes the following steps: (1) powder mixing by ball milling; (2) hot isostatic pressing sintering; (3) solid solution and aging treatment after sintering. The structure of the tungsten alloy material of the present invention is tungsten particles uniformly distributed on an austenite matrix reinforced with nano (FeMnAl) 3C carbide particles. Nano carbides and tungsten particles provide excellent strength; austenite matrix improves plastic toughness; the addition of Y inhibits the aggregation and growth of tungsten particles during the sintering process, further providing a strengthening and toughening effect. The tungsten alloy of the present invention is characterized by high strength, good plasticity, low thermal expansion coefficient, and good corrosion resistance, and has broad application prospects in civil and military industrie.