Copper Tungsten Breif Introduction

Copper tungsten (tungsten copper, CuW, or WCu) is a mixture of copper and tungsten. As copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. The microstructure is therefore rather a metal matrix composite instead of a true alloy.

The material combines the properties of both metals, resulting in a material that is heat-resistant, ablation-resistant, highly thermally and electrically conductive, and easy to machine.

Copper Tungsten Plate Picture

Parts are made from the CuW composite by pressing the tungsten particles into the desired shape, sintering the compacted part, then infiltrating with molten copper. Sheets, rods, and bars of the composite mixture are available as well.

Commonly used copper tungsten mixtures contains 10–50 wt.% of copper, the remaining portion being mostly tungsten. The typical properties is dependent on its composition. The mixture with less wt.% of copper has higher density, higher hardness, and higher resistivity. The typical density of CuW90, with 10% of copper, is 16.75 g/cm3 and 11.85 g/cm3 for CuW50 . CuW90 has higher hardness and resistivity of 260 HB kgf/mm2 and 6.5 μΩ.cm than CuW50.

 If you have any inquires concerning copper tungsten products, please do not hesitate to e-mail us by : sales@chinatungsten.com 

Copper Tungsten Rod

The copper tungsten round rod is ground to achieve the precise shape and size, meets American Welding Society RWMA Class 10 specifications, and has a precision tolerance. Copper tungsten provides high wear resistance, electrical and thermal conductivity, and corrosion resistance.

Copper tungsten is a high-strength composite of two metals: copper and tungsten. It combines the benefits of conductivity of copper with the heat and wear resistance of tungsten.

1, Diameter: 1.5-100.0mm
2, Length: 50-1000mm
3, Density: 12.60-17.05 g/cm3
4, Composition: W 55-90%, Cu 10-45%
5, Surface: Sintering surface, Forged surface, Ground surface

Tensile strength, used to indicate the material's overall strength, is the peak stress it can withstand before it breaks. Corrosion resistance describes the material's ability to prevent deterioration caused by atmosphere, moisture, or other medium. Wear resistance indicates the ability to prevent surface damage caused by contact with other surfaces. Hardness (commonly measured as indentation hardness) describes its resistance to permanent surface deformation.

Copper tungsten Alloy (WCu) is the composite of tungsten and copper which own excellent performance of tungsten and copper. It is used widely in such industries as engine, electric power, electron, metallurgy, spaceflight and aviation.


If you have any interest in our tungsten copper alloy products, please do not hesitated to contact us by email:sales@chinatungsten.com or by telephone:86 592 5129696, we are at your service.

Copper Tungsten Electrode

Copper Tungsten Electrode owns both the low-expansion properties of tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and thermal conductivity of conductive material can be adjusted to change the composition and thereby to the material provided to facilitate the use.

Technics: Copper infiltered Tungsten block in vacuum high-temperature stove.
Applications: Copper tungsten products are used in sealed cap for transistors sealing welder,   contactor materials for high-voltage switches, electrodes for spark processing, circuit breakers, and etc.
Virtue : Copper tungsten electrode has high physical and mechanical properties, as well as high thermal and electrical conductivity.
Supply State: Sintering, Turning, Grinding, finishing.

Supply Shape: We can supply copper tungsten in rods, rings, plates and other other abnormal pieces.

If you have any interest in our tungsten copper alloy products, please do not hesitated to contact us by email:sales@chinatungsten.com or by telephone:86 592 5129696, we are at your service.

Copper Tungsten Superior Wear-Resistance

Copper–tungsten (tungsten–copper, CuW, or WCu) alloy is a pseudo-alloy of copper and tungsten. As copper and tungsten are not mutually soluble, the material is composed of distinct particles of one metal dispersed in a matrix of the other one. The microstructure is therefore rather a metal matrix composite instead of a true alloy.
Tungsten alone is a very brittle metal with a high melting point, however the combination of copper and tungsten delivers a relatively hard material with superior arc and wear resistance, high physical properties at elevated temperatures, and good electrical and thermal conductivity.
Chinatungsten offers copper tungsten in round bars, square bars and flat bars with standard sizes available for immediate shipment or taylor-made sizes manufactured to order.

If you have any interest in our tungsten copper alloy products, please do not hesitated to contact us by email:sales@chinatungsten.com or by telephone:86 592 5129696, we are at your service.

Tungsten Copper Sheet(75-90WCu)

Since it has both tungsten and copper's character,the copper tungsten is very popular used in the EDM, because of it has very good wear resistance. Our copper tungsten plate for EDM is made by vacuum infiltration technology, which has very good physical and mechanical properties.
 Our copper tungsten plate has below advantage:
 1 Maturity press- sinter-infiltration process without any porosity issue.
 2 high electrical conductivity get rapid cutting speed.

If you have any interest in our tungsten copper alloy products, please do not hesitated to contact us by email:sales@chinatungsten.com or by telephone:86 592 5129696, we are at your service.

Resources makes new tungsten copper discoveries at Jervois

KGL Resources has intersected significant widths of near-surface copper mineralisation from exploration drilling at the Jervois copper-silver-gold project in the Northern Territory.

KGL Resources is aiming to increase the overall scale of the potential multi-metal mining project at Jervois as part of a Pre-Feasibility Study currently being undertaken.

The latest discoveries were made at the Rockface and Morley prospects.

Highlights from Rockface include: 9 metres at 1.21% copper, 4.1g/t silver, 0.03g/t gold from 105 metres; and - 24 metres at 1.47% copper, 3.5g/t silver, 0.04g/t gold from 160 metres.

The Rockface results are very significant in that the intersections are wide, near surface and between two large chargeability anomalies. Mineralisation is outcropping at surface.

Importantly, mineralisation remains open at depth and along strike.

The 2,000 metre drilling campaign intersected copper at the targeted Rockface and Morley Prospects, with the results including significant high grade, near surface intervals and the presence of copper in what is a 2 kilometre long IP anomaly.

Jervois current hosts an Indicated and Inferred Resource of 13.5 million tonnes at 1.3% copper and 25.8g/t silver for 170,415 tonnes copper and 11.6 million ounces silver at a (0.5% copper cutoff), and 69,000 ounces gold, 26,000 tonnes lead and 22,000 tonnes zinc.

Simon Milroy, managing director

“We are delighted with the first results from our exploration program at Jervois, focusing on previously undrilled targets Rockface and Morley.

"The results justify our strategy of seeking to increase the already substantial Resource base at Jervois for the current Feasibility Studies."

KGL is now preparing further drilling to follow-up along strike both to the east and west of the recent intersections, with the program to also target the strong IP anomaly located on strike and 200 metres east to the recent intersections.

Morley

Two holes were drilled at Central Morley to test for mineralisation associated with the recently identified IP anomaly.

Hole KJC002 was the shallower of two holes drilled in the central portion of Morley that intersected: 2 metres at 0.96% copper, 3g/t silver, 0.02g/t gold from 57 metres. Further down this hole at the 77 metre mark, a 2 metre wide zone of tungsten mineralisation was intersected at 0.55% tungsten.

Adding further interest to Jervois, historical drilling at the project have intersected zones of tungsten mineralisation that are often associated with the copper mineralisation and the potential of tungsten to generate additional by-products is being assessed as part of the Pre-Feasibility Study.

Analysis

KGL Resources is currently trading at close to cash-backing, with a market cap. of just $12 million and cash of $10.6 million at the end of September.

A sale of the Murchison gold project, currently on care and maintenance, is an asset with a defined gold resource and valution which would further increase the company’s cash reserves and underpin its under-valuation.

Which is underscored by the resource at Jervois which hosts an Indicated and Inferred Resource of 170,415 tonnes copper, 11.6 million ounces silver 69,000 ounces gold, 26,000 tonnes lead and 22,000 tonnes zinc.

The resource can only increase as the company continues to intersect broad zones of plus 1% copper mineralisation.

In terms of catalysts, KGL is working toward completing the Pre-Feasibility Study in the first half of 2014, which subject to the result, will be followed by a full Feasibility Study.

Peru's copper tungsten, silver, zinc production rise

Peru's metallic mineral production in July posted an increase in copper, silver, zinc and molybdenum, while gold, lead, tin, iron ore and tungsten fell, the mines and energy ministry reported.

Copper output rose 13.7% to 124,961t on gains at Glencore Xstrata's Tintaya-Antapaccay mine, Antamina and Buenaventura's El Brocal unit, the ministry said in a report posted on its website. Production fell at Southern Copper down 4%, and Freeport McMoRan's Cerro Verde (-7%).

Zinc (113,152t) and silver (306,056kg) output were also up compared to the year-ago month by 4.8% and 1.9%, respectively, the ministry said. Molybdenum rose 11% to 1,688t.

Gold output fell 4.2% to 442oz, while iron ore dropped 6.8% year-on-year to 575,144t as production dropped at Peru's only iron ore mine, operated by Chinese-owned Shougang. Lead fell 6% to 22,033t.

Tin production at Minsur slid 1% to 1,872t in July, while tungsten production was down 91% due to the suspension of the country's only tungsten mine, Malaga's Pasto Bueno due to an accident last year.

Through the first seven months of 2013, Peru's copper (+4.3%), zinc (+7.6%), lead (+2.4%), silver (+1.4%) and iron ore (+12.1%) production rose, while gold (-10.7%), tin (-14.7%) and molybdenum (-11.5%) were down.

Minerals account for approximately 60% of Peru's total exports.

Copper Tungsten and Tungsten Carbide Copper

Mi-Tech Metals’ copper tungsten alloys are commonly used in EDM electrodes and other electrical and electrical/thermal applications. They are also used for facing and inserts for flash and butt welding dies, projection welding electrodes, seam welding bearing inserts and facing for electro-forming and electro-forging dies.

Although they are somewhat more difficult to machine, tungsten carbide copper materials provide high mechanical properties and excellent resistance to erosion. They are commonly used in oil devices to protect the contact from oxidation.

To learn more about which copper tungsten alloy is best for your application, refer to the composite properties chart or contact a Mi-Tech Metals professional.

Note: Our CW70E, CW75 and CW80 materials are readily available in various stocked sizes of rods and flat bars.

Why Copper Tungsten?

If you've been reading the past few posts on the use of Copper Tungsten for Electrical Discharge Machining (EDM) electrodes, you know by now that the success of the process is largely influenced by both workpiece and electrode material properties.
Accordingly, choosing an electrode material ultimately depends on its ability to interact productively with your workpiece material, as well as on your particular production goal (e.g., cost savings? surface finish? improved wear resistance?).
There are several common metrics for measuring the success of your EDM production job:
EWR (electrode wear ratio),
MRR (material removal rate) and
Ra (surface finish).
So far we've discussed how copper tungsten can improve EWR both because of its innate structural integrity as derived from both Copper and Tungsten, and because of its resistance to DC Arcing--a common EDM related frustration.
This post is all about Material Removal Rates. MRR, or cutting speed, is largely dependent on the interaction between material properties and machining parameters.
Material Properties of Copper Tungsten
Copper with its excellent thermal conductivity, is the portion of the CuW composition that drives cutting speed. This begs the question: "Why not use a pure Copper electrode then?" The answer is that Electrolytic (pure) copper poses enormous challenges in manufacturability and wear rates. But, as you may have guessed, alloying it with Tungsten improves both conditions dramatically producing a better overall performance.
Interestingly, the addition of Tungsten to Copper often generates a recast layer, commonly referred to as "black layer," during the EDM process which can actually improve wear resistance. However the additional build up slightly lowers thermal conductivity and ultimately reduces the MRR.
EDM Process Parameters to Improve MRR
Because EDM is a thermal process one would logically infer that increasing thermal conductivity will increase MRR. But material removal rate is only one of three interdependent variables listed above. In reality, it's a bit more of a "Goldilocks" problem; there is a "just-right" solution where conductivity is high enough to improve cutting rates, but not so high as to leave the spark gap empty of heat. The material lends itself to a kind of process parameter sweet spot that can produce on spec parts, incredibly efficiently. And luckily, there are many really smart people who have developed empirical models for determining process parameters, as they relate to material properties.
And more crucially, studies have shown that thermal conductivity, alone, does not influence MRR, but the combination of copper tungsten's thermal conductivity and peak current does--the direct correlation being a stronger, more impactful spark makes for fast (albeit not pretty) material removal. (Note: Just increasing peak current without also increasing conductivity, compromises surface finish because of the more explosive, uneven burn.) More specifically, the influence of thermal conductivity is realized only in conjunction with peak current.
To find out more about Copper Tungsten and why you might choose for your EDM related applications, download our free white paper!

Copper Tungsten Products of Chinatungsten

We use the best tungsten copper which is much stronger due to it being composed of an even sturdier alloy.
This sintered tungsten copper alloy may be used in heavy spot and projection welding projects. Our tungsten copper is manufactured metallurgically and contains 70-90% tungsten. The structure is smooth, very hard and has high elasticity. The most important reasons for Brouwer Metaal to work with tungsten copper is its unrivalled versatility. We use tungsten copper in our products, because it has a very high melting point and this results in a very stable and safe product. Additionally, tungsten copper is a very good conductor this allows it to be used in electrodes that you use in resistance welding.
The products designed by us, Brouwer Metaal, are guaranteed to have been tested thoroughly in relation to all international guidelines. This ensures a high quality product allows you to do your resistance welding with the greatest precision. The construction of this alloy permits a degree of reliability and makes sure that as customer you do not need to hesitate anymore whether the welding will break or not.
For more information on how to obtain this product you can consult our webpage or phone us at the number mentioned on our homepage.
More information can be seen by choosing in the menu on the top. If you would like to receive more specific information regarding our products, please fill in the form on the left.

Copper Tungsten Contact

Chinatungsten Online offers high erosion resistant copper tungsten material produced by Powder Metallurgy wherein sintered skeleton of Tungsten is impregnated with Copper. The erosion pattern of this material is far superior to materials produced by other production techniques. This material maintains quite regular shape under extreme arcing conditions and has only uniform roughening effect without cracks and burn-off droplets.
The Tungsten skeleton is protected by impregnated copper as it provides evaporative cooling effect in extreme arcing conditions, thereby protecting and limiting the temperature rise of the skeleton and preventing disintegration. The grain size of tungsten powder has considerable influence on arc erosion behaviour of copper tungsten contact materials. Grain size of Tungsten is optimized to meet customer’s product needs in order to have low uniform erosion rates and burn-out patterns. All contact materials are produced by impregnation liquid phase sintering (wet sintering of presintered skeleton). Although laboratory tests indicate that minimum erosion occurs when the Tungsten grain size is between 2 and 8 µm, materials made of other grain sizes have also given superior performance in practice. The tungsten content in the composite does influence contact performance. Materials with particularly high Tungsten content consisting of fine powders, quickly develop cracks on the surface when subjected to repeated thermal and mechanical shocks. This can lead to parts of Tungsten skeleton’s disintegration and impairing the function of the Circuit Breaker.