Sintered Powder Metallurgy Refractory Alloy Wcu Foil, Sheet, Plate, Tube, Rod Machining Part

• Type: Cu (Copper/Copper-Alloy Welding Electrode)
• Material: Wcu 70/30 Wcu 75/25 and Wcu 80/2
• Diameter: Customized or by Drawing
• Length: Customized or by Drawing
• Welding Core Type: Alloy Structual Tungsten
• Electrode Coating Type: Tungsten Alloy
• Model NO.: CT004
• Composition %: 48-52, 38-42, 28-32, 23-27, 18-22 Copper, Balancew
• Standard: ASTM B702
• Shapes: Wire, Rod, Bar, Strip, Foil, Block, Plate, Ring,
• Class: a B C D E
• Hardnesss Rockwell B: 69-83, 77-90, 85-98, 89-102, 94-106
• Density Mg/M3 at 96% Theoretical: 11.7, 12.7, 13.7, 14.3, 15.0
• Electrical Conductivity, C% Iacs: 56-64, 49-57, 44-52, 41-48, 38-45
• Electrical Conductivity D% Iacs: 38-56, 34-49, 29-43, 27-41, 25-37
• Tensile Strength Ksi MPa: 50-60, 55-65, 75-85, 85-95, 90-100
• Transport Package: Export Wooden Cases
• Specification: Standard sizes or customized
• Trademark: Kefeng
• Origin: China
• HS Code: 81019990
• Production Capacity: 3000kgs Per Month

Product Description

The copper tungsten as CuW or WCu has been approved as a highly conductive and erasion resistant composite material that is extensively used as copper tungsten electrodes in EDM machining and resistance welding applications, electrical contacts in high voltage applications and heat sinks and other electronic packaging in thermal applications.  In general, the standard tungsten/copper ratios are WCu 70/30, WCu 75/25, and WCu 80/20. Other compositions include tungsten/copper 50/50, 60/40, and 90/10. The range of available compositions is from Cu 50 wt.% to Cu 90 wt.%. Xi'an Kefeng Metallury Co., tungsten copper product range includes copper tungsten rod, foil, sheet, plate, tube, tungsten copper rod, and machined parts.  As an ISO-accredited tungsten manufacturer, Xi'an Kefeng Metallury Co.,  is capable of processing various types of tungsten copper composites that all meet a consistently high standard.   Kefeng now offers: 65%W-35%Cu, 70%W-30%Cu, 75%W-25%Cu ,80%W-20%Cu material and we preform the production accordance with ASTM B702, and we, Kefeng Powder Metallurgy Co., manufactures and supplies DRC Conflict Free material only.  We produce various sizes, shapes and finished parts in forms as wire, rod, bar, sheet, ,strip, foil, sheet, plate, tubing, blanks, semi-finished and custom finished parts or according with customer's drawing paper.  Certification: Corporation is ISO9001 Certified, SGS approved and has been manufacturing the highest quality tungsten alloy metals for over 25 years.

Production Specifications
 

Rod Diameter   inches/mm	0.118″ (3mm) - 12″ (300mm)
Rod Length       inches/mm	0.15″ (3.81mm) - 11.81″ (300mm)
Plate Length      inches/mm	Maximum 12"(300mm)
Plate Width        inches/mm	Maximum 6.7"(170mm)
Plate thickness  inches/mm	0.12"(3mm) to 3.9"(100mm)
Sheet Length     inches/mm	Maximum 12"(300mm)
Sheet Width       inches/mm	Maximum 6.7"(170mm)
Sheet thickness inches/mm	0.12"(3mm) to 3.9"(100mm)

Characteristics and features

The Copper tungsten material products are highly resistant to heat, electric arc, wear and deformation at high temperature welding, flash butt and spot welding.  They also have excellent electrical and thermal conductivity.

1. Low thermal expansion
2. High wear resistance
3. Low consumption
4. High arc resistance
5. High thermal and electrical conductivity

Characteristics and features

Xi'an Kefeng Metallurgy Co., copper tungsten material products are highly resistant to heat, electric arc, wear and deformation at high temperature welding, flash butt and spot welding.  They also have excellent electrical and thermal conductivity.  These metal composite materials produce dense hard metals with low thermal expansion, good thermal and electrical conductivity, excellent arc resistance, superior wear resistance and strength at elevated temperatures.

1. Low thermal expansion
2. High wear resistance
3. Low consumption
4. High arc resistance
5. High thermal and electrical conductivity

Application
 

Tungsten copper (W-Cu) machined part has noticeably applied in many fields and applications due to its distinctive mechanical and physical properties. Tungsten copper materials possess high outstanding performance in the aspects of hardness, strength, conductivity, high temperature and arc erosion resistance which has been extensively used for the production of electrical contacts, heat sinkers and spreaders, die-sinking EDM electrodes and fuel injection nozzles.

Copper Tungsten Electrode

Tungsten copper is widely used in applications such as electrodes for sinker electrical discharge machining (EDM) and resistance welding. Copper tungsten EDM electrode is capable of machining hard refractory alloys of tungsten carbide. Copper tungsten can yield a better MMR (material removal rate) at a low level of TWR (tool wear rate) in comparison to copper, graphite, and other common materials electrodes. In addition, copper tungsten electrodes will become more desirable to utilize if the machining work requires high accuracy in dimension or an intricated geometry.

Therefore, copper tungsten is a relatively cost-saving and efficient option with respect to overcoming machining difficulties caused by a high melting temperature and high thermal shock and abrasion resistance. Tungsten copper composites are also a preferred gourp of material in resistance welding electrodes. 

Copper Tungsten Heat Sink And Packaging Material

Copper tungsten is a material commonly used in integrated circuits and high-power microelectronic devices as heat sink and packaging materials. It  presents superior thermal conductivity and machinability. Besides the copper tungsten composites process a relatively low and tailorable coefficient of thermal expansion. In addition, the CTE range of copper tungsten composites overlapped with that of semiconductor materials like SiC and ceramics substrate materials like Aluminum oxide (Al2O3) and Beryllium oxide (BeO). Therefore, WCu composite can be tailored to a close CTE to each material and efficiently prevent them from the damage of thermal stress fatigue.

Copper Tungsten Contact

Copper tungsten contacts show high closing and breaking performance in applications of high voltage circuit breakers, whatever the interrupting medium is an oil, vacuum, SF6 gas or air environment. When the low melting point copper particles melt and evaporate from the tungsten skeleton, those particles absorb large amounts of heat generated by the electrical arc. Apart from the cooling effect of copper tungsten, the high melting point tungsten particles also take credit for the superiority of copper tungsten contact by offering an unmatchable resistance to arc-erosion and a high density.

Copper Tungsten Nozzle

Copper tungsten (Cu W) has been recognized to be one of the preferred materials for aviation and aerospace usage due to is has a low thermal expansion and a high melting point. And the copper infiltrates contribute an exceptional transpiration cooling effect to the copper tungsten components when the working temperature is from 2000^oC to 3300 ^oC.  Thus the infiltrated tungsten offers superior resistance to thermal shock. it ensures the complex machined component maintains a stable condition and accurate dimension. These properties are widely used to make high-temperature resistance components such as the nozzles and throats of missiles and rockets.
 

Due to their unique properties, tungsten based composites are widely used where the combination of goods electrical and thermal conductivity and low thermal deformation is required.  Their mechanical and physical properties make them particularly suitable in electric resistance welding as electrical contacts or heat sinks and in electrodes for electrical discharge machining (EDM) and electrochemical machining (ECM), Kefeng's Copper Tungsten typical applications as followings:
 

1. High temperature furnace components, Heat Sinks
2. Edm electrodes, High-voltage Discharge Tubes
3. High voltage arc contacts, electrical contacts
4. Vacuum contacts, Electrodes for resistance welding and spark erosion
5. Seam welding bearing inserts, leaders
6. Balance weights, Spreaders, microwave carriers
7. Hermetic package bases and housings
8. Ceramic substrate carriers, medical components
9. Heating elements, dies for castings, high speed tools
10. Flash and Butt welding die inserts and facing
11. Projection welding electrodes

Technical parameters

Materials	Wt% Tungsten Content	Wt% Copper Content	Density (g/cc)	Electrical Conductivity (%IACS)	Hardness (HB)
W65Cu35	65	Balance	13.30	44	88
W70Cu30	70	Balance	13.80	42	88
W75Cu25	75	Balance	14.50	38	94
W80Cu20	80	Balance	15.15	34	98

Technical parametersNote: The values are typical and not to be used for specifications.




For three decades Kefeng Powder Metallurgy has pioneered and produced the best tungsten alloy metal solutions for the world's products, applications and industries.

-Our products are subjected to rigorous physical testing, including density, tensile, yield strength,conductivity, elongation and hardness.

-Our products are identified at all stages of the production process and are thoroughly analized and checked before delivery.

-Our products can be supplied with full verification in accordance with specifications,whatever
Chemically, mechanically or physically.

At Kefeng Metallurgy,our expert and equipment are committed to providing the best tungsten alloy
Refractory metal solution that performs our customer's requirements and improving overall quality.