Tungsten-nickel-iron alloy is composed with tungsten as the core component, and its content dominates the alloy, usually 80%~97%. This high proportion of tungsten is the basis for the alloy to achieve key properties such as high density and high hardness. Nickel and iron, as the binding phases, have a total content of 3%~20%, and the ratio of nickel to iron is mostly controlled at about 3:1. This ratio has been verified through long-term practice, enabling them to form a stable solid solution during sintering and effectively enhancing the bonding force between tungsten particles. In the specific composition, tungsten exists in the form of powder particles, with a particle size usually between a few microns and tens of microns, and the uniformity of its distribution has a significant impact on the overall performance of the alloy. Nickel, as an important part of the binding phase, has good wettability, which can fully wrap the surface of tungsten particles during sintering, promote the connection between particles, and improve the density of the alloy. Iron can work synergistically with nickel to further optimize the strength and toughness of the binding phase, and to a certain extent reduce the material cost. In addition, in some special-purpose tungsten-nickel-iron alloys, a very small amount of other elements, such as copper and molybdenum, may be added to specifically improve certain properties of the alloy, such as increasing electrical conductivity or enhancing high-temperature resistance, but the content of these added elements is usually no more than 1%, which will not change the basic characteristics of the alloy with tungsten, nickel and iron as the main components.
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