Tungsten Alloy is an alloy with other elements added to the base of tungsten. In metals, tungsten has the highest melting point, high temperature strength and creep resistance, as well as heat conduction, conductive and electron emission properties. than significant, Tungsten Alloys in addition to a large number of cemented carbide and alloy additives, tungsten and its alloys are widely used in electronics, electric light source industry, but also in the aerospace, foundry, weapons and other sectors used in the production of Rocket nozzles, die-casting molds, armor piercing core, contact, heating and heat insulation screen.
Tungsten alloy material is a kind of tungsten matrix (W content 85-99), and added Ni, Cu, CO, MO, CR and other elements of alloy. According to the alloy composition characteristic and the use divides into W-ni-fe, W-NI-CU, W Co, W W Xu, W-ag, and other major series, Tungsten Alloys its density up to a large. 5-19, and the world is called high gravity alloy, it also has a series of excellent characteristics, than the major: the general proportion of 16.5-18, high strength: tensile strength of 700-1000, absorption ray ability: its ability than lead high $number, The thermal conductivity is large: 5 times times of the die steel, the coefficient of thermal expansion is small: only iron or steel 1 2 1 3, good conductive performance, good solderability and processability. Since the high gravity alloy has these excellent functions, it is widely used in aerospace, aviation, military, oil drilling, electrical instrumentation, medicine and other industries.
Tungsten Alloys The high density tungsten alloy material has good shielding benefit for the radioactive material because of the high density characteristic of tungsten alloy. It is found that the high density properties of metals have a good shielding effect on radiation, Tungsten Alloys and the better shielding of radiation with the increase of metal density. Therefore, tungsten alloy shielding parts have a good shielding effect.
The density of lead and tungsten alloys in existing metals is relatively large. Metal lead is used earlier, but some problems have been exposed during the long term use. Lead itself and its compounds are toxic to the human body, poisoning through the respiratory tract can be inhaled by its vapor or dust, Tungsten Alloys and then swallowed in the respiratory tract of the cells to quickly bring it to the blood, or through the digestive tract absorption, into the bloodstream and poisoning. The poisoned person generally has the lead and the lead chemical contact history. Oral 2-3 grams can cause poisoning, 50 grams can be lethal. The authorities are vigorously studying the substitution of lead and phasing out the use of lead. Tungsten is gradually being valued in this context. In the production of shielding products in general use of high gravity tungsten alloy, the morning company produced tungsten alloy is not only dense and non-toxic harmless.
Tungsten alloys and lead materials exhibit more environmentally friendly properties than tungsten alloys. Tungsten itself is non-toxic and does not produce radioactive material. Tungsten alloy is easy to process and tungsten is rich in reserves.
At present, the standard material of tungsten alloy has not been published abroad, Tungsten Alloys and the domestic authorities have tried to use it as the standard material of tungsten alloy after mixing the main component metal powder. But the particle size is very small metal powder easily oxidized, storage, transport may cause changes in composition, can not meet the tungsten alloy standard material stability and uniformity requirements, the relevant units in accordance with the "first-class standard material technical specifications" research tungsten alloy standard material.
The content of each component of 4 kinds of tungsten alloy standard material was determined, all raw materials using high-purity metal powder, less than 0.074mm of particle size is not less than 97%, by feeding, mixing, mixing homogeneity test, pressure embryo, sintering, Tungsten Alloys vacuum heat treatment sintered tungsten alloy rods, the use of spectrophotometric method of initial detection uniformity and stability. After the linear inspection and production assessment.
The standard material of tungsten alloy has been inspected and evaluated, its uniformity, stability and steady-value reliability meet the technical requirements of first-class standard material, overcomes the phenomenon that using mixed metal powder as standard material is easy to be oxidized and distributed unevenly, which can provide reference for the development of similar standard material.