A melting of Ni-W alloy prepared by the method, the selection of a certain size and oxygen content of W powder and Ni powder, and mixed powder in the mixer, and then the mixture powder moulding, then put compact at high temperature and vacuum sintering furnace, vacuum inside the furnace, the first and then to sintering of billet heating furnace pressure, Ni-W alloy after sintering in high temperature melting furnace, The furnace is vacuumized first, then filled with protective gas for heating and melting, and finally machined to get the finished Ni-W target material. The invention provides a preparation method of single-phase structure and high density Ni-W alloy target material, and the preparation method of the invention has low cost, simple process and easy implementation.
Ni-W alloy coatings have high hardness, good wear resistance and corrosion resistance, high temperature oxidation resistance, easy to release and non-adhesion, so Ni-W coatings have been successfully used in MEMS and ULSI. In addition, because of its no pollution to the environment, in recent years, it has gradually replaced chrome plating layer is widely used in bearings, cylinders, pistons and casting molds, hot forging dies and other surface strengthening technical fields.
The method of sintering the alloy first and then melting the alloy with inert gas protection is different from the conventional smelting method and other powder metallurgy methods. Therefore, the density of Ni-W alloy is improved, the content of Ni-rich solid solution in the alloy is increased, and a completely single-phase Ni-W solid solution is formed, and the distribution of Ni and W elements is more uniform.
A preparation method of Ni-W alloy with high density and only single-phase nickel-tungsten solid solution is provided, and the method adopts conventional argon shielded melting method and cooling with the furnace, which makes the preparation cost low and the operation process simple.
