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  • Q What is Tungsten Alloy Bar?

    Tungsten alloy bar is consisting of 85-99% tungsten with balanced commonly nickel and iron or copper and other component. The alloys are made by liquid-phase sintering to give a structure consisting of almost pure tungsten particles in a matrix of the alloy elements. Tungsten alloy bar is enlarging a hole that has already been drilled or cast by means of a single-point cutting tool to achieve greater accuracy of the diameter of a hole such as in boring a cannon barrel. In addition, it can be used to cut a tapered hole.
  • Q What is Tungsten Alloy Blank?

    A Tungsten alloy blank is tungsten alloy product without any machining. The product can be produced by pressing and sintering metal powders into tungsten alloy rod, tungsten alloy plate, which are worked by rolling or swaging into rod, sheet, etc.
  • Q What is Tungsten Alloy Rod?

    A Tungsten alloy rod is produced by mixing and pressing tungsten and other metal powders and sintering them into semi-product billets, which is worked by rolling or swaging into rod. It can be produced into any lengths as per requirement of customer with a smooth surface at diameters more than 3mm, and diameter of hollow tube wall is below 3mm. Tungsten alloy rod can be machined into hollow type. Specific lengths and special fabrications can be supplied upon request.
  • Q What is tungsten heavy alloy?

    Tungsten heavy alloys generally are refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloy is added with Co、 Mo、Cr, etc. They have very high melting point and have a density twice that of steel and are more
    than 50% heavier than lead. Tungsten content in conventional heavy alloys varies from 90 to 98 weight percent and is the reason for their high density (between 16.5 and 18.75 g/m3). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten grains together and which makes the alloys ductile and easy to machine. Nickel-iron is the most popular additive, in a ratio  of 7Ni:3Fe or 8Ni:2Fe (weight ratio). The conventional processing route for tungsten heavy alloys includes mixing the desired amount of elemental powders, followed by cold pressing and liquid phase sintering to demanded density. The matrix alloy melts and takes some tungsten into solution during liquid phase processing, resulting in a microstructure through which large tungsten grains (20–60µm) are dispersed in the matrix alloy. The as-sintered material often is subjected to thermo mechanical processing by swaging and aging, which results in increased strength and hardness in the heavy alloys.
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