Binary alloy of silver and tungsten , whether in liquid or in solid, silver and tungsten are immiscible . There AgW30, AgW60, AgW80 and AgW90 so on. Hardness high arc erosion resistance , anti- adhesion and anti- fusion welding ability. Manufactured by powder metallurgy . More than 60% tungsten alloy production of multi-use impregnated . Used for low-voltage power switch, crane switch, locomotive switch , high current switching pre- contact, as well as heavy-duty relays, air circuit breakers. Cobalt can be added to improve the wettability of silver tungsten , reduce the contact resistance .

Silver and tungsten sintered products , higher conductivity than copper tungsten , as mainly suitable for resistance welding electrodes require high antioxidant work environment . As EDM electrodes of the ordinary copper electrode when the finish is difficult to achieve , so that the abrasive to achieve a very high precision.

AGW-70 silver tungsten electrode materials, and mainly used in welding materials ; such as : low-voltage automatic switch, high voltage circuit breakers and protection switch and so on.

Need for silver tungsten electrodes , usually difficult to machine tool processing equipment and high- quality finish electrode, the electrode repair ordinary copper electrode to achieve the best finish , making the mold to achieve very high accuracy.


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Silver Tungsten Electrode Technical Parameters :

Product Name Symbol silver impurity conductivity IACS% tungsten Density g/cm3 Hardness HB ≥ bending strength

Silver Tungsten 30 AgW30 70 ± 1.5 0.5 margin 11.75 ; 75 75

Silver Tungsten 40 AgW40 60 ± 1.5 0.5 12.4 66 margin 85

Silver Tungsten 50 AgW50 50 ± 2.0 0.5 margin 13.15 57 105

Silver Tungsten 55 AgW55 45 ± 2.0 0.5 margin 13.55 54 115

Silver Tungsten 60 AgW60 40 ± 2.0 0.5 margin 14 51 125

Silver Tungsten 65 AgW65 35 ± 2.0 0.5 14.5 48 margin 135

Silver Tungsten 70 AgW70 30 ± 2.0 0.5 14.9 45 margin 150 657

Silver Tungsten 75 AgW75 25 ± 2.0 0.5 15.4 41 margin 165 686

Silver Tungsten 80 AgW80 20 ± 2.0 0.5 16.1 37 margin 180 72


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The silver and tungsten and the alloy composition , a binary alloy of silver and tungsten . Because a high melting point of tungsten silver with each melt can not , so you can not use the traditional method of preparation , silver tungsten alloy powder metallurgy method of preparation must .

Silver tungsten alloy combines the advantages of silver and tungsten , high melting point, high specific gravity , cutting , high conductivity , wear resistance, damage , resistance welding , anti-oxidation ; is the electrode of the best, you can make a very general processing equipment and tool difficult to process out of the high finish of the electrode ; tungsten electrodes with silver electrodes better than ordinary to achieve the best finish results, so that the mold to achieve very high accuracy.

Silver tungsten is characterized by its high strength and resistance to soldering , mainly by the penetration and the nominal composition of the silver content from 20 to 50% . Tungsten increases, the hardness is reduced , and soldering ability . Whether liquid or solid, silver and tungsten can not be miscible. The material is characterized by high hardness , resistance to arc erosion , anti-adhesion , anti- welding capability.

Silver tungsten electrodes and electrode materials are mainly used in welding materials ; such as : voltage automatic switch, high voltage circuit breakers and protection switch and so on. Widely used in high temperature materials, high-voltage switch with electrical alloy , EDM electrodes , microelectronics materials, parts and components as widely used in aerospace , aviation , electronics, electric power, metallurgy , machinery, sports equipment and other industries.


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
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One kind of tungsten electrode yttrium invention discloses a manufacturing method for manufacturing the tungsten electrode yttrium , the method comprising :

a. Would doped yttrium nitrate aqueous solution spray evenly mixed with solid material way paratungstate (APT) or tungsten trioxide , heated drying coating made ​​of tungsten, yttrium powder ;

b. Obtained for the yttrium -coated tungsten powder obtained after reduction twice yttrium tungsten powder , after pressing, sintering made ​​of tungsten, yttrium billet ;

c. Forging pressure processing manner using the obtained tungsten billet made ​​of yttrium Yttrium tungsten electrode . In this method, the yttrium nitrate aqueous solution was sprayed Doping mixed with ammonium paratungstate (APT) or tungsten oxide in the solid material in spray form the yttrium nitrate aqueous solution encapsulated in the ammonium paratungstate (APT) or tungsten trioxide of the surface to mixing, stirring, with the completion of drying , to prepare a uniform coated yttrium tungsten powder , improve the production capacity and make more uniform powder coating , yttrium tungsten effectively improved the performance in the welding electrodes .


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One kind of tungsten electrode manufacturing yttrium, characterized in that:

a.The doped yttrium nitrate aqueous solution spray evenly mixed with solid material way paratungstate (APT) or tungsten trioxide, heated drying into powder-coated tungsten yttrium;

b.On the prepared powder coated tungsten yttrium twice yttrium tungsten powder obtained after reduction by pressing, sintering temperature yttrium billet made ​​of tungsten;

c.Using the pressure processing method of the obtained forged tungsten billet made ​​of yttrium Yttrium tungsten electrode.


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Gold is so soft that when jewelry is made from it, it is usually alloyed with one or a combination of copper, nickel, and silver. If gold jewelry is immersed in an individual acid, the gold itself will not dissolve, although the alloying metal does dissolve. If a chunk of metal is fake gold--if it consists of a metal sample in which there is very little to no gold--it will dissolve in nitric acid.

Density First
Before treatment with acid, the density of the jewelry should be evaluated. Gold has a density of 19.3 grams per cubic centimeter of metal. Copper and nickel are less dense than that--8.96 and 8.91 respectively. Silver has a density of 10.49. If the density of the jewelry is not appreciably more than 9, the piece is fake. Even if it has a trace of gold in it, perhaps a plated covering, it is less than the 10-Karat designation of the lowest grade of solid gold jewelry.

Pure Gold
Pure gold, called also 24-Karat gold, dissolves in alkali cyanide and in a few other unusual substances. It will not, however, dissolve in individual mineral acids. It does dissolve in certain combination acids, most notably "aqua regia" (a mixture of concentrated hydrochloric and nitric acids). Gold dissolved in aqua regia produces a dark amber-to-orange color.

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Shoppers who are looking to buy real gold may unfortunately purchase tungsten gold, or fake gold, by accident. Fake tungsten gold bars are cheap substitutes for the real thing.

Background
Tungsten gold is considered the Ancient Metal of Kings. Tungsten is also called “the heavy stone.”

Pricing
While gold is priced in the tens of thousands per pound, tungsten costs less than $100 per pound. Charging the real gold price for tungsten gold leads to a huge profit.

Qualities
Tungsten gold is scratch-resistant and lightweight. Per cubic centimeter, it has a density of 19.25 grams at room temperature. At liquid density, it is 17.6 grams per cubic centimeter.

Determining Type of Gold
It’s difficult for the average person to quickly spot tungsten gold. However, those who are experienced in the gold industry can find ways to determine if the gold is fake or not.

Purity of Other Metals
Silver and platinum tend to be pure, since the materials are often melted down for making cell phones and catalytic converters.

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A bucking bar assembly that positions a bucking bar for clamping a first panel and a second panel along a lap joint and upsets a rivet to fasten the first panel to the second panel at the lap joint. The assembly includes a lateral carriage system for moving the bucking bar along a length of the lap joint, and a rotational carriage system for rotating the bucking bar relative to the lateral carriage.

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The bucking bar includes an L-shaped bucking die having a wide section and a thin angular section capable of sliding between an obstacle and the shank. The L-shaped bucking bar consists of Tungsten Carbide. The bucking bar also includes a bucking bar arm coupled to the wide section of the L-shaped bucking die for positioning the thin angular section of the bucking die between the obstacle and the shank of the rivet

A metal tool used to flatten the rivet's shank into a driven button during the riveting process. The bucking bar is used as an anvil to react the forces being driven into the rivet with a rivet gun, thus deforming the rivet.

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bucking bars in general and more particularly to a tool which has a longer serviceable life, an appreciably lower fatigue factor and a lower decibel shock and vibration rating in use.

The bucking bars of this include two principal parts separated by a low-recoil impact-resistant urethene plastic member, to absorb the shock load and minimize vibrational effects which contribute to the otherwise high-decibel rating of the tool. They are fastened together by means that allow some relative movement between them but keeps the cushioning member in contact with both parts at all times.

In one of the preferred forms, the handle part is formed with an undercut notch towards the toolhead and the latter is formed for engagement therein so that both axial and lateral thrust loads are absorbed in the tool. This particular tool is also reversible in that the end of the handle part is also formed for taking an impact load and the head end may be used as the handle.

Another form  includes mating cylindrical parts with a blind end separated to absorb the shock load.

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