CN102162045B

CN102162045B - Electrical contact based on powdered copper and manufacturing process thereof

Info

Publication number: CN102162045B
Application number: CN 201110077217
Authority: CN
Inventors: 陈长晶
Original assignee: WENZHOU YINTAI ALLOY MATERIAL CO Ltd
Current assignee: WENZHOU YINTAI ALLOY MATERIAL CO Ltd
Priority date: 2011-03-29
Filing date: 2011-03-29
Publication date: 2013-04-03
Anticipated expiration: 2031-03-29
Also published as: CN102162045A

Abstract

The invention provides an electrical contact based on powdered copper and a preparation process thereof. The electrical contact based on the powdered copper is prepared from the following materials in percentage by weight: 0.3 to 7 percent of nickel, 0.1 to 6 percent of boron, 0.1 to 8 percent of tungsten, 0.2 to 10 percent of graphite, 1 to 7 percent of titanium, 0.1 to 6 percent of molybdenum, 0.1 to 8 percent of diamond, 0.2 to 7 percent of lanthanum, 0.5 to 9 percent of aluminum, 0.5 to 8 percent of niobium, 0.1 to 5 percent of silicon, 0.1 to 6 percent of yttrium, 0.1 to 6 percent of chromium, 0.1 to 5 percent of cerium, and the balance of copper powder. The preparation process comprises the steps of mixing, cold pressing and sintering. In the preparation process, a general silver alloy contact is replaced by copper, so that the cost of silver alloy contacts of electric switches is reduced. The electrical contact based on the powered copper has high electrical performance and mechanical properties, and is a cheap substitute product of silver alloy materials of electrical contacts of low-voltage electric switches.

Description

The manufacturing process of electrical contact based on powdered copper

Technical field

The invention belongs to field of metallurgy, be specifically related to a kind of electrical contact based on powdered copper matrix material for low-voltage apparatus, also relate to the manufacturing process of this electrical contact based on powdered copper simultaneously.

Background technology

Electrical contact as low-voltage apparatus key element, play a significant role at the safety and reliability that ensures low-voltage apparatus.Therefore, to having relatively high expectations of electrical contact material, qualified electrical contact material should possess the low good guide performance of long, shock-resistant, corrosion-resistant, resistance of life-span and the easy physicals such as welding processing.For guaranteeing the reliability of electrical contact work, large multiaction precious metal such as silver and alloy material thereof are made both at home and abroad.But because expensive, the resource-constrained of noble silver is difficult to use on a large scale on low voltage electrical equipment.In order to save production cost, to economize on resources and the requirement of environmental protection, need to seek a kind of equivalent material that meets low-voltage apparatus electrical contact performance requriements.

Summary of the invention

The purpose of this invention is to provide a kind of aboundresources, cheap and long service life, shock-resistant, corrosion-resistant, anti-oxidant, electrical contact based on powdered copper matrix material that resistance is low.Simultaneously, the present invention also provides the preparation technology of this electrical contact based on powdered copper.

The technical solution adopted in the present invention is as follows:

A kind of electrical contact based on powdered copper is prepared from (weight percent) by following material:

Nickel 0.3-7%, boron 0.1-6%, tungsten 0.1-8%, graphite 0.2-10%,

Titanium 1-7%, molybdenum 0.1-6%, diamond 0.1-8%, lanthanum 0.2-7%,

Aluminium 0.5-9%, niobium 0.5-8%, silicon 0.1-5%, yttrium 0.1-6%,

Chromium 0.1-6%, cerium 0.1-5%, surplus is copper powder.

As a further improvement on the present invention, described electrical contact based on powdered copper is prepared from (weight percent) by following material:

Nickel 0.3%, boron 0.15%, tungsten 0.1%, graphite 0.25%,

Titanium 2%, molybdenum 0.15%, diamond 0.2%, lanthanum 0.3%,

Aluminium 0.5%, niobium 0.5%, silicon 0.15%, yttrium 0.1%,

Chromium 0.13%, cerium 0.2%, surplus is copper powder.

The manufacturing process of electrical contact based on powdered copper of the present invention specifically may further comprise the steps:

(1) taking by weighing raw material rolled 2 hours in high energy mixing drum machine is mixed;

(2) enter and be pressed into original shape with 350 tons of oil presses in the model, put into again 850 ℃ of sintering of high-temperature vacuum furnace and cool off after 1 hour;

(3) become required specification by annealing steel rolling, become the contact shape with stamping machine.

Beneficial effect of the present invention is: the price of material is low, practical on low voltage switch, strong, wear-resisting, the anti-corruption of the low segmentation ability of resistance is decreased, electric arc is little, the life-span is long, solved the high problem of price of noble silver, reduced the cost of electric switch silver contact far away, this invention replaces general silver cadmium oxide contact, material price is cheap, be received by the market very much, used customer response very good, and qualified by the authoritative detection 25Kv of department disjunction.

The present invention replaces general silver alloys contact with copper, material therefor low price and aboundresources, thus reduced the cost of electric switch silver alloys contact.Electrical contact of the present invention and good electric property is arranged and the mechanical property such as corrosion-resistant, resistance to oxidation, anti-mechanical shock, hardness height, life-span is long in actual use, close with Ag-ZnO material electrical contact performance, be the cheap substitute products of low-voltage apparatus electrical contact silver alloy.

Among the preparation technology of electrical contact based on powdered copper of the present invention equipment is not had particular requirement, preparation process meets environmental requirement.

Embodiment

Embodiment 1:

Take by weighing by weight percentage raw material: nickel 0.3%, boron 0.15%, tungsten 0.1%, graphite 0.25%, titanium 2%, molybdenum 0.15%, diamond 0.2%, lanthanum 0.3%, aluminium 0.5%, niobium 0.5%, silicon 0.15%, yttrium 0.1%, chromium 0.13%, cerium 0.2%, surplus is copper powder.First optimum value is mixed with copper powder, after carrying out 2 hours mixed rolling with high energy mixing drum machine, again with the powdered alloy that mixes, the 4kg powder is put into model and is pressed into shallow lake, garden shape with the 350T oil press, put into again the cooling in 1 hour of 850 ℃ of sintering of high-temperature vacuum furnace, come out of the stove and push integer with the 350T oil press again, again put into the high-temperature vacuum furnace sintered heat insulating 1 hour.Coming out of the stove directly is pressed into the sheet material shape with the 650T extrusion machine, becomes required specification by annealing steel rolling again, becomes the contact shape with stamping machine.

The electrical contact based on powdered copper performance of making is as follows:

Density 8.3g/cm

Resistivity 2.4G Ω cm

Hardness 40～60 (Hv)

Embodiment 2:

Take by weighing by weight percentage raw material: nickel 0.3%, boron 0.1%, tungsten 0.1%, graphite 0.2%, titanium 1%, manganese 0.1%, diamond 0.1%, lanthanum 0.2%, aluminium 0.5%, niobium 0.5%, silicon 0.1%, yttrium 0.1%, chromium 0.1%, copper 96.4% mixes in high energy mixing drum machine, and the mixed time of rolling is 2 hours.Reenter in the model and suppress with 350 tons of oil presses, put into again 850 ℃ of sintering of high-temperature vacuum furnace and cool off after 1 hour.Become required specification by annealing steel rolling, become the contact shape with stamping machine, make electrical contact based on powdered copper.

Density 8.3g/cm

Resistivity 2.4G Ω cm

Hardness 40～60 (Hv)

Embodiment 3:

Take by weighing by weight percentage raw material: nickel 6%, boron 4%, tungsten 7%, carbon 8%, titanium 7%, manganese 6%, Tungsten oxide 99.999 8%, lanthanum 7%, aluminium 7%, niobium 6%, silicon 5%, yttrium 6%, cadmium 6%, copper 27% mixes in high energy mixing drum machine, and the mixed time of rolling is 2 hours.Reenter in the model and suppress with 350 tons of oil presses, put into again 850 ℃ of sintering of high-temperature vacuum furnace and cool off after 1 hour.Become required specification by annealing steel rolling, become the contact shape with stamping machine, make electrical contact based on powdered copper.

Density 8.3g/cm

Resistivity 2.4G Ω cm

Hardness 40～60 (Hv)

Claims

1. the manufacturing process of an electrical contact based on powdered copper is characterized in that, may further comprise the steps:

(1) takes by weighing raw material mixed rolling 2 hours in high energy mixing drum machine;

Its Raw composition in mass ratio is:

Nickel 0.3%, boron 0.15%, tungsten 0.1%, graphite 0.25%,

Titanium 2%, molybdenum 0.15%, diamond 0.2%, lanthanum 0.3%,

Aluminium 0.5%, niobium 0.5%, silicon 0.15%, yttrium 0.1%,

Chromium 0.13%, cerium 0.2%, surplus is copper powder;

(2) enter in the model to be pressed into to justify with 350 tons of oil presses and decide shape, put into again 850 ℃ of sintering of high-temperature vacuum furnace and cool off after 1 hour;

(3) be rolled into required specification by annealing, be pressed into the contact shape with stamping machine.