COPPER TUNGSTEN ALLOYS

TYPE: WCu50, WCu40, WCu30, WCu20, WCu15

WCu alloy is the composite of Tungsten and Copper , which own the excellent performances of Tungsten and Copper , such as heat-resistant , ablate-resistant , high-intensity , excellent thermal and electrical conductivity. WCu alloy is easy to be machined. WCu alloy is used widely in such industries as engine , electrical power , electron , metallurgy , spaceflight and aviation. Using CIP formation , sintered tungsten skeleton and infiltrating copper (silver) technology , large size and special shape products of WCu composites with 6-90 percent of copper are produced , such as electric contacts , electrode , refractory parts , heat sinks andpart of rocket. WCu Alloy Main applications : For the spark erosion of dies of cemented carbide and for making high speed steel and switches and contacts in high and low voltage electrical devices.

Information

Advantages
•   High arc resistance combined with good electrical conductivity
•   High thermal conductivity
•   Low thermal expansion

Application
•   Contacts in high voltage breakers and vacuum interruptors
•   Electrode in spark erosion cutting equipment
•   Heat sinks in electronic devices
•   Electrode for resistance welding

Resistance Welding
     The high physical and mechanical properties , as well as the thermal and electrical conductivity , of refractory metal composites make WCu alloy very suitable for die inserts and electrode facings, flash and butt welding dies , and hot upsetting. They can also solve heat balance problems.
EDM and ECM
     WCu alloy are used worldwide for EDM (Electrical Discharge Machining) and ECM  (Electrochemical Machining) electrode.All material is manufactured by the press , sinter , and infiltrate process. Virgin powders are used , resulting in a consistent homogeneous material giving high and even burning rates. Copper tungsten is used in plunger/sinker applications where intricate definition is required , especially in tungsten carbide.

Chemical Composition and Properties Chart

Composition	Density gr/cc	IACS %	Hardness HB Kgf/mm2	Bend Strength MPa
W50 Cu50	11.85	54	115	-
W55 Cu45	12.30	49	125	-
W60 Cu40	12.75	47	140	-
W65 Cu35	13.30	44	155	-
W70 Cu30	13.80	42	175	667
W75 Cu25	14.50	38	195	706
W80 Cu20	15.15	34	220	736
W85 Cu15	15.90	30	240	765