CuW Tungsten Copper Alloy Bars Rods For Welding

Product Details:
Place of Origin: China
Brand Name: JX
Certification: ISO
Model Number: Tungsten Copper Alloy Bars
Payment & Shipping Terms:
Minimum Order Quantity: 10kgs
Price: according to actual products
Packaging Details: standard packing
Delivery Time: 25days
Payment Terms: T/T
Supply Ability: 300kgs month

Detail Information

Size: As Request Quality: ISO9001:2008
Surface: Polishing,burnishing,black Surface Delivery Time: 25days
Packing: Standard Exporting Name: Tungsten Copper Alloy Bars
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CuW Tungsten Copper Alloy Bars


CuW Tungsten Copper Alloy Rods


Welding Tungsten Copper Alloy Bars

Product Description

CuW Alloy Tungsten Copper Alloy Bars Rods For Welding


Tungsten Copper Alloy Bars (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.

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.

Tungsten Copper Alloy Bars picture:
CuW Tungsten Copper Alloy Bars Rods For Welding 0CuW Tungsten Copper Alloy Bars Rods For Welding 1CuW Tungsten Copper Alloy Bars Rods For Welding 2

Tungsten Copper Alloy Bars Applications
CuW Alloy composites are used where the combination of high heat resistance, high electrical and thermal conductivity, and low thermal expansion are needed. Some of the applications are in electric resistance welding, as electrical contacts, and as heat sinks. As contact material, the composite is resistant to erosion by electric arc. WCu alloys are also used in electrodes for electrical discharge machining and electrochemical machining.

The CuW Alloy composite, with 75% tungsten, is widely used in chip carriers, substrates, flanges, and frames for power semiconductor devices. The high thermal conductivity of copper together with the low thermal expansion of tungsten allows thermal expansion matching to silicon, gallium arsenide, and some ceramics. Other materials for this applications are copper-molybdenum alloy.

Composites with 70–90% of tungsten are used in liners of some specialty shaped charges. The penetration is enhanced by factor 1.3 against copper for homogeneous steel target, as both the density and the break-up time are increased. Tungsten powder based shaped charge liners are especially suitable for oil well completion. Other ductile metals can be used as a binder in place of copper as well. Graphite can be added as lubricant to the powder.

CuW can also be used as a contact material in a vacuum. When the contact is very fine grained , the electrical conductivity is much higher than a normal piece of copper tungsten Copper tungsten is a good choice for a vacuum contact due to its low cost, resistance to arc erosion, good conductivity, and resistance to mechanical wear and contact welding. CuW is usually a contact for vacuum, oil, and gas systems. It is not a good contact for air since the surface will oxidize when exposed. CuW is less likely to erode in air when the concentration of copper is higher in the material. The uses of CuW in the air are as an arc tip, arc plate, and an arc runner.

Copper tungsten materials are often used for arcing contacts in medium to high voltage sulfur hexafluoride circuit breakers in environments that can reach temperatures above 20,000K. The copper tungsten material's resistance to arc erosion can be increased by modifying the grain size and chemical composition.

Usually, this process is used with graphite, but as tungsten has a high melting point (3420 °C) this allows the CuW electrodes to have a longer service life than the graphite electrodes. This is crucial when the electrodes have been


Specifications of Tungsten Copper Alloy Bars

Code No. Chemical Composition % Mechanical properties
CU Impurity W Density (g/cm3 ) Hardness HB RES( cm) Conductivity IACS/ % TRS/ Mpa
CuW(50) 50±2.0 0.5 Balance 11.85 115 3.2 54  
CuW(55) 45± 2.0 0.5 Balance 12.30 125 3.5 49  
CuW(60) 40±2.0 0.5 Balance 12.75 140 3.7 47  
CuW(65) 35±2.0 0.5 Balance 13.30 155 3.9 44  
CuW(70) 30±2.0 0.5 Balance 13.80 175 4.1 42 790
CuW(75) 25±2.0 0.5 Balance 14.50 195 4.5 38 885
CuW(80) 20±2.0 0.5 Balance 15.15 220 5.0 34 980
CuW(85) 15±2.0 0.5 Balance 15.90 240 5.7 30 1080
CuW(90) 10±2.0 0.5 Balance 16.75 260 6.5 27 1160

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