目前,工业用钨合金主要有W-Ni-Cu和W-Ni-Fe系。由于W-Ni-Cu合金在冷却凝固过程中易于形成脆性相WNi_4,严重地影响该合金的机械性能和断裂特性,加之,该合金产生析出相的温度范围相当宽。与此相反,W-Ni-Fe合金液相和固相间温度范围相当窄,从而使脆性相的析出几率变小。因此,用Fe代替Cu,或用Co部分代替 Currently, tungsten alloys for industrial use mainly include W-Ni-Cu and W-Ni-Fe systems. Because W-Ni-Cu alloy tends to form brittle phase WNi_4 during cooling and solidification, the mechanical properties and fracture properties of WNi-Cu alloy are seriously affected. In addition, the temperature range of the precipitation phase of W-Ni-Cu alloy is quite wide. In contrast, the W-Ni-Fe alloy has a rather narrow temperature range between the liquid and solid phases, resulting in a lower probability of precipitation of the brittle phase. Therefore, Fe is used instead of Cu or a part of Co is replaced