Electrical contact based on powdered copper and manufacturing process thereof
A manufacturing process and technology of electrical contacts, applied in the field of metallurgy, can solve the problems of limited resources, expensive precious metal silver, difficult to use on a large scale, etc., and achieve the effects of low price, strong segmentation ability and small arc
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Embodiment 1
[0023] Weigh raw materials by weight percentage: nickel 0.3%, boron 0.15%, tungsten 0.1%, graphite 0.25%, titanium 2%, molybdenum 0.15%, diamond 0.2%, lanthanum 0.3%, aluminum 0.5%, niobium 0.5%, silicon 0.15% , 0.1% yttrium, 0.13% chromium, 0.2% cerium, and the balance is copper powder. First mix the best value with copper powder, and use a high-energy mixing roller machine for 2 hours to mix and roll, then put the mixed alloy powder, 4kg powder into the mold, press it into a round lake with a 350T hydraulic press, and then put it into a vacuum Sinter in a high-temperature furnace at 850°C for 1 hour to cool down, then use a 350T hydraulic press to squeeze and shape it, and then put it into a vacuum high-temperature furnace for sintering and heat preservation for 1 hour. After being out of the furnace, a 650T extrusion machine is used to press it into a plate shape, and then annealed and rolled into the required specifications, and then it is formed into a contact shape with ...
Embodiment 2
[0029] Weigh raw materials by weight percentage: nickel 0.3%, boron 0.1%, tungsten 0.1%, graphite 0.2%, titanium 1%, manganese 0.1%, diamond 0.1%, lanthanum 0.2%, aluminum 0.5%, niobium 0.5%, silicon 0.1% , 0.1% of yttrium, 0.1% of chromium, and 96.4% of copper were mixed in a high-energy mixing drum machine, and the mixing time was 2 hours. Then enter the model and press it with a 350-ton hydraulic press, then put it into a vacuum high-temperature furnace for sintering at 850°C for 1 hour and then cool it down. The steel is annealed and rolled to the required specifications, and then formed into a contact shape by a punching machine to make a powdered copper-based electrical contact.
[0030] The properties of the powdered copper-based electrical contacts are as follows:
[0031] Density 8.3g / cm
[0032] Resistivity 2.4GΩcm
[0033] Hardness 40~60(Hv)
Embodiment 3
[0035] Weigh raw materials by weight percentage: nickel 6%, boron 4%, tungsten 7%, carbon 8%, titanium 7%, manganese 6%, tungsten oxide 8%, lanthanum 7%, aluminum 7%, niobium 6%, silicon 5% %, yttrium 6%, cadmium 6%, copper 27%, mixed in a high-energy mixing drum machine, and the mixing time was 2 hours. Then enter the model and press it with a 350-ton hydraulic press, then put it into a vacuum high-temperature furnace for sintering at 850°C for 1 hour and then cool it down. The steel is annealed and rolled to the required specifications, and then formed into a contact shape by a punching machine to make a powdered copper-based electrical contact.
[0036] The properties of the powdered copper-based electrical contacts are as follows:
[0037] Density 8.3g / cm
[0038] Resistivity 2.4GΩcm
[0039] Hardness 40~60(Hv)
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