tungsten bar Try to use advanced mold processing technology to produce high-quality carbide drawing dies

At present, most of the tube with a tungsten tungsten coil pick from. tungsten filaments In feeding the process, a lot of cracking scrap tungsten plate, yielding low, rolled into a tube shape is not round, the difference between the radial strength of the tube. Moreover, pipe wall thickness tolerance volume tungsten plate although strictly controlled, but the influence of the cigarette seam, the uniformity of the thickness of the tube is undesirable. To this end, we use a powder metallurgy method of trial Spinning seamless tungsten tube. Abstract trial program blanks consumption. Material selection 601 plant purity tungsten powder, its tungsten tube. Set the powder uniformly charged with intermediate tungsten carbide rod plastic sleeve, sealed with a stopper and rounded ends, and press-molded at a maximum pressure of 2 tons / cm, the concentration of the HIP container, and finally on the hydrogen sensor 200KW sintering furnace sintering, the sintering process. Gives the tungsten filament  physical properties of tungsten powder particle size greater difference between the two groups composed of cumulative curves and median diameter, and these two groups of tungsten powder at a temperature of 2350 ~ 2400 ℃ sintered at different times by the density and grain size.

tungsten bar most of the tube with a tungsten coil connection is made using tungsten

At present, China's nonferrous metals trade, the largest trade smelting products , its quality directly affects the quality of subsequent processing of the product. As of 2005 , remelting ingots , copper cathode , lead, zinc , zinc , tin ingots, magnesium, gold bullion , silver bullion , such as product standards average water reached the international advanced level , quality and international level is very kind . Among them, 48 brands of eight kinds of products on the London Metal Exchange is the world's largest non-ferrous metals market , to enter the international market marks the recognition of product quality . China's major copper, aluminum , lead, zinc , tin and other production companies are registered . Because from the production technology, equipment level to greatly improve enterprise management , the quality of non-ferrous metal processing material has significantly improved. National standard processing materials , the industry standard system integrity, the standard level of developed countries are equivalent, but the overall level of physical quality is uneven , with some typical wood processing products quality has reached the international advanced level. For example ,tungsten bar and refrigeration with brass, before basically rely on imports in recent years, not only meet the domestic demand for the rapid development of air conditioning and refrigeration industry , strongly supports the development of household appliances, power generation and other industries , but also exported to Japan and Europe and other countries for China to become the world's largest air conditioner , refrigerator production , tungsten cubic  make a contribution. Aluminum profiles for the construction industry in recent years has been the rapid development of its products quality has reached the international level , not only meet the domestic demand for the rapid development of the construction industry , but also a large number of export . At present, China has become the world's first architectural aluminum production, exports , consumer. Thanks to the development of aluminum profiles market competition mechanism , after nearly a decade of market competition and elimination, product variety and quality has thus reached a new level. In rare metals and powder metallurgy products, our tantalum powder and tantalum wire processing other materials tantalum and niobium , lithium products such as industrial lithium carbonate, tungsten filaments hydroxide monohydrate and tantalum chloride anhydrous crystalline tantalum, lithium metal , with its products quality able to meet and exceed the technical requirements of the standard , endorsed, export volume rising domestic and foreign users .

Tungsten Cubic Uses and properties of molybdenum-copper

Molybdenum Copper military power suitable for the manufacture of microelectronic devices as a heat sink and tungsten cubic the sealing material of aluminum oxide ceramic sealing and structural materials molybdenum-copper alloy rod, but also for the manufacture of microelectronic devices civil power
Pieces of high thermal conductivity given inflation sealing heat sink with molybdenum copper alloy rod .
Molybdenum-copper alloy of copper and molybdenum comprehensive advantages of high strength, high specific gravity , high temperature resistance, arc ablation , electric conductivity properties, tungsten filaments good processing performance. Using high -quality oxygen-free copper molybdenum powder and powder , apply isostatic
Pressure molding ( high temperature sintering - copper infiltration ) , to ensure product purity and accuracy ratio, organized crime , and excellent performance. Breaking arc resistance, electrical conductivity, thermal conductivity, thermal expansion smaller.

tungsten bar Another important use of tungsten

Another important use of tungsten, which is in rockets, missiles, spacecraft, and return-type nuclear reactors and other important applications on the cutting-edge science. This is because the tungsten having excellent physical, mechanical, corrosion resistance and nuclear performance reasons. Such as tungsten alloy at 1900 ℃ high tungsten carbide ball tungsten carbide plate is still large, and in such high temperatures, either steel or heat-resistant super alloys are melted into a liquid. Mainly used to manufacture various types of rocket engines without cooling throat; made ​​with infiltration silver tungsten nozzle can withstand temperatures above 3100 ℃ for various types of missiles and aircraft; tungsten fiber composite materials produced by the rocket nozzle, the ability of 3500 ℃ or higher; in the chemical tungsten weights industry, equipment and components for corrosion do; do lubricants, pigments, and various reactions.

Tungsten Cubic Molybdenum deficiency disorders on the

Molybdenum deficiency disorders molybdenum disk on the human body: the body's energy metabolism can place obstacles, resulting in myocardial hypoxia and focal necrosis. Prone to kidney stones and urinary tract stones. Lead to iron deficiency anemia. Promote dental caries. And the incidence of esophageal cancer are closely related. Overdose: gout-like syndrome, joint pain and deformity, kidney damage. The body's requirement for molybdenum growth retardation, weight loss, hair loss, atherosclerosis, molybdenum foil connective tissue degeneration and skin diseases.

Molybdenum does to the human body

1. Maintain the myocardial energy metabolism: Kekai molybdenum chart is a composition of several kinds of enzyme in myocardial, play an important role in myocardial energy supplies. Keshan disease is a kind of cardiomyopathy, has proved that selenium deficiency is one of the causes, but more direct reason is the lack of molybdenum.

2. Molybdenum and immune: on the immune function of patients with keshan testing found that specific cellular immune function is reduced, molybdenum crucible deficiency crowd of supplements molybdenum immune function recovery. But too molybdenum also have damage to the immune function, and this has been confirmed in the animal experiments.

3. Adjust the thyroid gland secretion: research has shown that in keshan disease ward in the crowd and molybdenum and selenium, can adjust the thyroid function, thyroid function returned to normal.

Molybdenum deficiency may be one of the cause of esophageal cancer.

The Chinese nutrition society made the daily diet of molybdenum disk "safety and appropriate intake" reference indexes, infants less than 6 months each 0.03 ~ 0.06 mg per day, 1 year old of less than 0.04 ~ 0.08 mg per day, 1 over the age of 0.05 ~ 0.10 mg, 0.06 ~ 0.15 mg, aged 4 7 years old of above 0.10 ~ 0.30 mg per day, 11 years of age or older to adult is 0.15 ~ 0.50 mg per day per person. This index and the scientific research committee of food and nutrition council estimates of "safe and appropriate

Tungsten bar red pigment and pigment Fast precipitan Metal catalyst

used in the manufacture of alkaloids , ink , fertilizers , Kekai tungsten bar red pigment and pigment Fast precipitan Metal catalyst , molybdenum salts , can also be used to make flame tungsten boat and suppression of pollution- water system Pr

eparation , also used as galvanizing , polishing agents and chemical reagents.