Preparation method of tungsten copper alloy tube
Tungsten carbide rod with hole is a metal composite material with tungsten and copper as the main components. It is a structure formed by uniformly mixing two-phase monomers of tungsten and copper. fake alloy. The tungsten copper alloy tube combines the excellent properties of the two components of the metal, and has both the high melting point of metal tungsten (melting point 3410 ° C), high density (density 19.34 g/cm³), low expansion coefficient and metal copper. It has the advantages of good performance, and has the characteristics of uniform microstructure, high temperature resistance, arc ablation resistance, high mechanical strength, high density, and good electrical and thermal conductivity. Not only that, the properties of tungsten-copper alloy can also be adjusted by changing the proportion of its components.
The preparation methods of tungsten copper alloy pipes mainly include high temperature liquid phase sintering method, infiltration method, hot pressing sintering and activation sintering method. The physical properties of tungsten and copper are very different, incompatible with each other, unable to form a solid solution, and have a huge difference in melting point. After compression molding, liquid-phase sintering at 1300 ℃ ~ 1500 ℃ into tungsten-copper alloy with high density. In the preparation process, the sintering activity can be improved by adding elements such as nickel, and the density of the alloy can be improved. The infiltration method can also be used. First, the tungsten powder is pressed into shape and sintered into a tungsten skeleton with a certain porosity, and then copper is infiltrated to prepare a tungsten-copper alloy with a more uniform microstructure and low copper content.
Tungsten copper alloy pipes are widely used in cemented carbide and insoluble metals. Because tungsten-copper alloys are easy to be machined, the use of tungsten-copper alloy tubes has played a great role in the case where the surface needs to be easy to cut and requires a small inner diameter.
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