Tungsten alloy ,also named tungsten heavy alloy, generally is refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloys are added 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/cc). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten grains together and which makes tungsten 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 alloy includes mixing the desired amount of elemental powders, followed by cold pressing and liquid phase sintering to almost full 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.
The majority of current uses for WHAs (tungsten heavy alloy) are best satisfied with the W-Ni-Fe system. Alloys such as 93W-4.9Ni-2.lFe and 95W-4Ni-lFe represent common compositions. The addition of cobalt to a W-Ni-Fe alloy is a common approach for slight enhancement of both strength and ductility. The presence of cobalt within the alloy provides solid-solution strengthening of the binder and slightly enhanced tungsten-matrix interfacial strength. Cobalt additions of 5 to 15% of the nominal binder weight fraction are most common.

Why not tungsten alloy? Tungsten material is also made into tungsten carbide product, which is a chemical compound that contains carbon and tungsten and is similar to titanium carbide. It was originally developed for use as a cutting tool, in machine tools applications, where it still finds wide use today. Cemented tungsten carbide is neither a metal nor is it a ceramic, which are prepared by reacting carbon and tungsten at a temperature of between 1400-2000ºC. With its highest hardness as 86~93 HRA (68~81HRC), however, it is not called tungsten alloys, but tungsten carbide, because its superior wear resistance and high cutting speed,. Besides, as it is easily brickle, tungsten carbide is widely used as cutting blade, drill, bits, nozzles, etc. but not for crack resistance, tungsten alloys are usually widely used as tungsten alloys radiation shielding, tungsten alloys crankshaft, tungsten alloys counterweight, which is usually made of tungsten alloys materil with its special properties as good elongation, small capacity with high density, good corrosion resistance, wonderful shock resistance, high radiation adsorption capability, etc.

Why you should choose Chinatungsten Online? With 20 years experiences, Chinatungsten Online has been being the leading tungsten heavy alloy manufacturer and top tungsten alloy suppliers in China. Now Chinatungsten Online is very pleased because, as the professional tungsten alloy manufacturer and tungsten alloy suppliers, it has offered hundreds of heavy alloys to more than 5000 clients worldwide in the past 2 decades. Also, We are very honored that we have offered our best service, design, drawing, repairing together with products. But it is just the reason made us as a special tungsten alloy manufacturer and tungsten alloy suppliers is sharing our experiences and recycling the waste tungsten materials back from our customers if it is expected. We are looking forwards to offering our tungsten materials in the form of sintered blank and/or finished ground parts according to the design of you.

If you have any interest in tungsten alloys, please feel free to contact us by email: sales@chinatungsten.com or by telephone:86 592 5129696.

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