Tungsten Cooper Heat Sink

Tungsten Cooper Heat Sink

Tungsten copper alloy is consisting of tungsten and copper, copper content of 10% to 50%. made of powder metallurgy alloy. It has good electrical and thermal conductivity, good high temperature strength and a certain plasticity. At high temperatures, such as above 3000 ℃. The copper alloy is liquid evaporates,absorbs heat, reducing the surface temperature. Therefore, these materials are also known as metallic sweat material. Tungsten copper alloy have a wide purpose, mainly used to manufacture anti-arc ablation of high-voltage electrical switch contacts and the rocket nozzle throat insert, rudder and other high temperature components, and also used for EDM electrode, high temperature moldsand other thermal conductivity and high temperature performance required to usethe occasion. Fine selection of tungsten copper tungsten, copper powder, refine dart soak sintering process, can withstand the high stress of nearly 2,000 high moderate, high melting point, high hardness, anti-burning and good anti-adhesion, electrical erosion product surface finish high, high precision, low loss. Tungsten copper is widely used as high-pressure, super-hydraulicswitch and circuit breaker contact, protection ring for electric upsetting anvil block of material, conductive Tsui automatic submerged arc welding, plasma cutting nozzles, welding machines, welding head for welding , roll welding wheels,electrode and the point of sealing gas Mao spark electrodes, spot welding, butt welding materials.

 

 Characteristics of tungsten copper

1. Resistance welding electrode: the advantages combinating tungsten and copper, high temperature resistance, arc erosion, high strength, heavy, electrical conductivity, thermal conductivity, and easily machining, and has features such astranspiration cooling,with the high hardness of tungsten, high melting point,anti-adhesion characteristics, often applied for resistance projection welding, butt welding electrodes which has a certain resistance to abrasion,high temperature

2. EDM Electrode: tungsten steel and high temperature super-hard alloy made for moulds by electrolysis, the common electrode wear, slow, and the high powertungsten and copper corrosion rate, low attrition rate.  The precise shape of the electrode and excellent processing performance, could ensure the accuracy of the workpiece increased greatly.

3. High-voltage discharge electrodes: Vacuum discharge tube working, contacts material will rise to thousand degrees Celsius temperature in a second time. The W-Cu high ablation resistance, high toughness, good electrical conductivity, thermal conductivity and stability provide the necessary conditions for the discharge tube.

4 Electronic packaging materials: low-expansion characteristics of both the tungsten, but also has high thermal conductivity properties of copper, its thermal expansion coefficient and electrical and thermal conductivity by adjusting the material composition and to change.

 

Application of tungsten copper

Tungsten copper alloy combines the advantages of tungsten and copper, which the high melting point of tungsten (tungsten melting point of 3410 ℃, coppermelting point 1080 ℃), Highdensity (density of tungsten 19.34g/cm, copper density 8.89/cm3); excellent thermal conductivity properties of copper, tungsten copper alloy (composition generally ranges WCu7 ~ WCu50) uniform micro structure,high temperature, high strength, resistance to arc erosion, density; conductivity,moderate thermal conductivity, high temperature materials are widely used in military, high-voltage switch with electrical alloy, EDM electrodes,microelectronics materials, parts and components are widely used as aerospace, aviation, electronic, electric power, metallurgy, machinery, sports equipment and other industries.

Main Grades and Properties

	RWM Group B	Nominal composition % Weight	Rockwell Hardness	Electrical Conductivity %ACS	Ultimate Tensile Strength PSI	Cross Breaking Strength PSI	Density GMS/CC	Thermal Exp in/in cx10(6) at 20°c	Thermal Conductivity W/CM 20°c -400°c
CuW55	-	45 copper	79B	55	63000	110000	12.6	11.8	2.4
		55 tungsten
CuW68	-	32 copper	88B	52	75000	130000	13.93	10.9	2.1
		68 tungsten
CuW70	Class 10	30 copper	90B	50	85000	140000	14.18	10.77	2.01
		70 tungsten
CuW75	Class 11	25 copper	94B	48	90000	150000	14.7	10.22	1.89
		75 tungsten
CuW78		22 copper	96B	46	94000	160000	15.12	9.3	1.84
		78 tungsten
CuW80	Class 12	20 copper	98B	44	96000	170000	15.58	9.2	1.82
		80 tungsten
CuW85	-	15 copper	102B	36	75000	170000	16.19	7.97	1.75
		85 tungsten
CuW90	-	10 copper	106B	28	70000	150000	17.05	6.49	1.47
		90 tungsten

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