Tungsten Oxide/Trioxide Price

Tungsten Carbide Milling Tool

Details: Category: Tungsten Information; Published on Friday, 10 May 2013 15:54; Hits: 2302

When the edge of tungsten carbide milling tool cuts into the workpiece, sudden impact will cause the vibration of the tool. The generation of cutting force primarily depends on the thickness of the chip, the thickness and the feed become into a certain proportion. The tool vibration initially induced will change subsequent chip thickness, and then when the cutting force changes, in turn, it causes the vibration of the processing system intensifying, the thickness may also continue to increase. The direction and change of the cutting forces largely determine the vibration trend. Such regenerative vibration is also called tremor, if not suppressed, and the variation of the cutting force will increase, so the surface roughness decreases after cutting, it results in joint cutter, and even causes damage to the tungsten carbide milling tools, furthermore, adversely affects on machine tool spindle.

Therefore, you must inhibit cutting force drastically changing in the beginning of the cutting so as to suppress the vibration trend, which is the main reason of using vibration-controlling tool. However, in many cases, this is achieved by optimizing structural parameters of tungsten carbide milling tool. Establishment of desirable model is one of the main bases for developing new insert geometries. Subsequently, the advanced FEM simulation shows a lot to answer, it relates to unit design of edge line, rake angle and chip breaker as well as development and optimization of new features of the cutting edge on the tungsten carbide milling tool rake face . This is largely based on a vibration waveform which is calculated by the measured modal parameters.

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Intorduction of Tungsten Alloy Wire

Details: Category: Tungsten Information; Published on Friday, 10 May 2013 15:49; Hits: 2341

Tungsten alloy wire is essential for the production of lighting products such as wire filament, and other goods where its high temperature properties are of use. Among its properties are a melting point of 3410° C, a low coefficient of thermal expansion and low vapor pressure at elevated temperatures, along with good electrical and thermal conductivity.

Important applications of tungsten alloy wire are for the production of coiled incandescent lamp filaments, cathode and support structures for power tubes, heating elements for high temperature furnaces and evaporation sources in metallizing processes. Thicker wire sizes, straightened, finish-ground and cut into rod pieces are widely used for glass-to-metal seal lead parts in the lighting and electronic industries.

Why We Use Tungsten Alloy Shot?

Details: Category: Tungsten Information; Published on Friday, 10 May 2013 15:28; Hits: 2185

High density, great hardness and resistance to high temperature make tungsten alloy to be one of the most sought-after materials for shotgun pellets in shooting history.

The density of tungsten alloy is about 18g/cm3, only gold, platinum, and a few other rare metals have a similar density. So it is denser than any other shot material, including lead, steel or bismuth. Comepared with other materirals, the tungsten alloy fly farther, hit harder and penetrate deeper. That means more birds, farther out, with fewer cripples.

Another unique property of tungsten alloy is that it is non-toxic, it is friendly to the environment, so it is safe for people to handle and work with.

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Intorduction of Tungsten Copper Alloy

Details: Category: Tungsten Information; Published on Friday, 10 May 2013 15:37; Hits: 2165

Tungsten copper alloy product is a sintered tungsten copper material manufactured by powder metallurgy. It forms dense composite offering hardness, wear resistance and a high softening temperature of tungsten combined with the good electrical conductivity of copper.

Tungsten copper alloy may be used as an electrical contact material. In the most severe applications associated with power generation and transmission the switch may be totally immersed in oil. In these cases there is no advantage in using the tarnish resistant silver-based materials, as oxidation is prevented by the exclusion of air. Tungsten copper alloy contacts are widely used in these cases, the selection of the grade used being dependent on the relative importance of conductivity and arc resistance.

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Introduction and Application of Tungsten Heavy Alloys III

Details: Category: Tungsten Information; Published on Friday, 10 May 2013 15:10; Hits: 2113

WHAs(tungsten heavy alloys) have been widly used for apparatus and instrument in medical, military and airspace industries.

The majority of current uses for WHAs (tungsten heavy alloys) are best satisfied with the W-Ni-Fe system. Tungsten heavy 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 arc most common.

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