What is tungsten alloy (high density tungsten alloy) ?

Time : 2023-05-20Hits :

Below, Tungsten Alloy manufacturers will take you to learn about it:

Tungsten Alloys are usually refractory metals and are generally composed of W-Ni-Fe (tungsten nickel iron) or W-Ni-Cu (tungsten nickel copper) or W-Ni-Cu-Fe (tungsten nickel copper iron). Some tungsten alloys also have the addition of Co (cobalt), Mo (molybdenum), Cr (chromium), etc. They have a high melting point, a density twice that of steel, and a weight 50% heavier than lead. The content of tungsten in alloys usually accounts for 90% to 98%, which is why tungsten alloys can have high density (usually 16.5 grams/cubic centimeter to 18.75 grams/cubic centimeter). Ni, Fe, and Cu are used as adhesives to bond brittle tungsten together, thereby enhancing the ductility of tungsten alloys and making them easy to process. Ni Fe is a commonly used additive, with a ratio of 7Ni: 3Fe or 8Ni: 2Fe (by weight).

The conventional production process of tungsten alloys includes mixing, cold pressing, and liquid phase sintering until the required density is achieved. During the process of liquid phase sintering, this matrix alloy is in a molten state, which helps tungsten dissolve better in the liquid and disperses large tungsten particles (20-60 microns) into this matrix alloy. This type of material in the sintered state usually undergoes a thermal mechanical treatment process, such as forging, to enhance its hardness and strength. At present, the composition of high density alloys (tungsten alloys) is popular with WNiFe, such as 93W-4.9Ni-2.lFe and 95W-4Ni-lFe. Adding an appropriate amount of cobalt to WNiFe alloy can enhance its strength and ductility.

The main properties of tungsten alloys

Tungsten alloys have many special properties, such as small volume but high density (usually ranging from 16.5 grams per cubic centimeter to 18.75 grams per cubic centimeter), high melting point, high hardness, excellent wear resistance, high ultimate tensile strength, good ductility, low vapor pressure, high temperature resistance, good thermal stability, easy processing, corrosion resistance, good seismic resistance, extremely high radiation absorption ability, excellent impact resistance and cracking resistance, and non-toxic and environmentally friendly, It is consistent with international environmental protection standards.

High density tungsten alloys are mainly used for

There are many types of high density tungsten alloy products. Different processing methods can produce tungsten alloy products of different shapes, such as tungsten alloy rods, tungsten alloy cylinders, tungsten alloy bars, tungsten alloy blocks, and so on. Due to the characteristics of tungsten alloys, such as small volume, high density, high strength, and high hardness, tungsten alloys can be used in many fields. In the field of sports, it is used as a counterweight for golf clubs, tungsten alloy fishing pendants, and tungsten alloy dart rods for rowing and racing; In the medical field, tungsten alloys can be used as radiation shielding components, radiation source containers, collimators, isotope containers, and syringe shielding components; In the field of scientific research, tungsten alloys can be used as radiators, as well as for oil drilling and mineral resource exploration.

Nowadays, due to the increasing demand for depleted uranium and the similar characteristics of tungsten alloys to depleted uranium, tungsten alloys are widely used as substitutes for depleted uranium in the military field. In addition, the density of tungsten alloy is similar to that of gold, so tungsten alloy gold-plated products can be widely used as a substitute for gold. Tungsten alloy can be made into tungsten alloy gold plated rod, tungsten alloy gold plated block, tungsten alloy gold plated paperweight, tungsten alloy gold plated commemorative coin. Due to the high melting point of tungsten alloys, they can also be used in high-temperature environments, such as rocket ignition tubes and rocket engines. Tungsten alloy does not cause pollution to the environment, and tungsten alloy materials are widely made into tungsten alloy fishing pendants. Tungsten alloy is superior to lead because of its small volume and high density. Due to its characteristics, tungsten alloys are widely used in daily life.