CN100562956C - The manufacture method of high temperature resistant silver oxide contact tip material - Google Patents
The manufacture method of high temperature resistant silver oxide contact tip material Download PDFInfo
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- CN100562956C CN100562956C CNB2007100499151A CN200710049915A CN100562956C CN 100562956 C CN100562956 C CN 100562956C CN B2007100499151 A CNB2007100499151 A CN B2007100499151A CN 200710049915 A CN200710049915 A CN 200710049915A CN 100562956 C CN100562956 C CN 100562956C
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Abstract
The present invention is the manufacture method of high temperature resistant silver oxide contact tip material, step is: behind any 1～7 kind and the metal melting of surplus for silver of the tin of I, certain weight ratio, zinc, cadmium, bismuth, copper, indium, iron, insulation, alloying is got rid of the band machine with single roller rapid quenching and is obtained the silver alloy band fully.The rotating speed of cold quenching roller is 3m/s～30m/s.II, at 500～750 ℃, under the oxygen pressure of 0.1～10MPa 12～24 hours with the oxidation of silver alloy band.III, be processed as contact material according to a conventional method.Metal oxide particle is tiny in the material of this law preparation, and hardness (HV0.3) reaches as high as: 130, and can following temperature rising and reduce, made contact can be under 85 ℃ condition steady operation, high temperature resistant, resistance fusion welding can be good; Adopt the single roller rapid quenching of existing making magnetic material to get rid of carrying device, improve its nozzle form and size, adjust conditions such as temperature, fast quenching process atmosphere, can obtain fast quenching silver alloy band, need not to design new equipment, and operation is grasped easily.
Description
(1) technical field
The present invention relates to the manufacture method of silver oxide contact tip material, be specially a kind of manufacture method of high temperature resistant silver oxide contact tip material.
(2) background technology
Along with electrical equipment constantly develops to high-power, small size direction, the current density that contact material carried in the electrical equipment is increasing, and the temperature rise of contact material also strengthens thereupon.Under some particular surroundingss, require electrical equipment at high temperature to work simultaneously, therefore the also corresponding rising of the working temperature of contact material requires the contact material resistance to elevated temperatures to get well.
The main preparation methods of silver oxide contact tip material mainly contains alloy inner oxidation method, powder mixing method, powder oxidizing process, chemical coating method etc. at present.The gained silver oxide contact tip material is owing to have conduction, heat conduction and anti-melting welding preferably, anti-electroerosion ability, in electrical equipment such as relay, contactor, circuit breaker, obtained to use widely, but at present the material electric life at high temperature prepared of method is often far below the electric life under the normal temperature, and the silver oxide contact electric life when working under 85 ℃ of conditions only is 20%～30% when working under 25 ℃ of conditions.
Therefore in order to satisfy the requirement of each electric appliances development, need the manufacture method of a kind of high temperature resistant silver oxide contact tip material of research and development, the gained contact material can be 85 ℃ high temperatures work, the hardness of material is higher, and can not reduce, have good heat-resistance, resistance fusion welding energy with the rising of temperature.
(3) summary of the invention
The objective of the invention is to disclose a kind of manufacture method of high temperature resistant silver oxide contact tip material, combine quick quenching technique and internal oxidation, obtain to have the high temperature resistant silver oxide contact tip material of ultrafine particle.
The manufacture method of high temperature resistant silver oxide contact tip material of the present invention comprises the steps:
The I quick quenching technique obtains the silver alloy band
Being tin 2%～18% and/or zinc 2%～15% and/or cadmium 8%～20% and/or bismuth 0.1%～5% and/or copper 0.1%～15% and/or indium 0.1%～8% and/or iron 5%～15% surplus with percentage by weight forms silver alloy, 1050～1500 ℃ of smelting temperatures for the metal melting of silver.Behind the metal melting, be incubated 10～30 minutes again, make wherein that each element fully spreads, fully alloying.
The silver alloy of molten condition is got rid of band machine acquisition silver alloy band with single roller rapid quenching.
1. for guaranteeing to continuously produce the silver alloy bandlet, the outlet of designs of nozzles ovalisation, nozzle minor axis 2～5mm, major axis 7～15mm;
2. in order to make quick quenching band in the fast quenching process, carry out oxidation, shorten the follow-up oxidation operation time, reduce cost, in the process of fast quenching pressurising, add air in certain amount in the argon gas of pressurising, it is 5～35% that the air of adding accounts for the total weight ratio, realizes the pre-oxidation of fast quenching alloy strip;
3. in order to obtain the quick quenching band that thickness meets the demands, pressurising makes it to quicken mass flowing nozzle to silver alloy solution, and the total pressure of air and argon gas is 0.02～0.08MPa during pressurising, and the thickness of gained band is 0.1～0.5mm.
4. the rotating speed of cold quenching roller is 3m/s～30m/s.
Be oxidized to the band that silver and oxide mix in the II silver alloy band
The alloy inner oxidation method is carried out interior oxidation to the silver alloy band routinely, obtains the band that silver and oxide mix.
At 500～750 ℃, the silver alloy band was oxidized to the band that silver and oxide mix in 12～24 hours under the oxygen pressure of 0.1～10Mpa, metal oxide is evenly distribution in silver matrix, and oxide particle is of a size of and is less than or equal to 5 μ m.
The band Mechanical Crushing briquetting according to a conventional method that III silver and oxide mix is squeezed into wire rod or sheet material, reprocesses to be final contact material.
The advantage of the manufacture method of the high temperature resistant silver oxide contact tip material of the present invention is: 1, metal oxide particle is tiny in the material of this law preparation, material hardness (HV0.3) can reach 100～130, and hardness can not reduce with the rising of temperature, this law prepare the made contact of material can be under 85 ℃ condition steady operation, have good heat-resistance, resistance fusion welding energy; 2, adopt the single roller rapid quenching of existing making magnetic material to get rid of carrying device, improve its nozzle form and size, adjust conditions such as temperature, fast quenching process atmosphere, can obtain fast quenching silver alloy band, need not to design new equipment, and operation is grasped more easily.
(4) description of drawings
Fig. 1 gets rid of band acquisition silver alloy band schematic diagram for the manufacture method embodiment step I single roller rapid quenching of this high temperature resistant silver oxide contact tip material.
Number in the figure is: molten silver alloy 1, cold quenching roller 2, silver alloy band 3.
(5) embodiment
The I quick quenching technique obtains silver-colored sn-bi alloy band
Silver 90%, tin 9%, bismuth 1% are fused into the silver alloy of molten condition in intermediate frequency furnace.1050～1500 ℃ of smelting temperatures behind the metal melting, are incubated 30 minutes again.
As shown in Figure 1, the silver alloy 1 usefulness single roller rapid quenching with molten condition gets rid of band machine acquisition silver alloy band 2.Get rid of the band machine nozzle for oval, minor axis 3mm, major axis 10mm; In the fast quenching process, with argon gas weight account for 80% and air weight account for 20% gas pressurized 0.05MPa, the rotating speed of cold quenching roller 2 is 16m/s, gained silver alloy band 3 thickness are 0.2mm.
Be oxidized to the band of silver and tin oxide, bismuth oxide mixing in the II silver alloy band
At 500 ℃, following 24 hours of the oxygen pressure of 10Mpa, with the oxidation of silver alloy band, tin oxide and bismuth oxide evenly distribute in silver matrix, and the tin oxide particle is 0.08～0.2 μ m, and the bismuth oxide particle is 0.1～0.2 μ m.
The band Mechanical Crushing briquetting according to a conventional method that III silver and tin oxide bismuth oxide mix is squeezed into wire rod or sheet material under the pressure of 900 ℃ temperature, 200MPa, reprocess to be final contact material.Material hardness (HV0.3) is: 130.
The I quick quenching technique obtains silver-colored kirsite band
Silver 92%, zinc 8% are fused into the silver alloy of molten condition in intermediate frequency furnace.1050～1500 ℃ of smelting temperatures behind the metal melting, are incubated 20 minutes again.
The silver alloy 1 usefulness single roller rapid quenching of molten condition is got rid of band machine acquisition silver alloy band 3.Getting rid of the band machine nozzle is the ellipse of minor axis 5mm, major axis 15mm; In the fast quenching process, with argon gas weight account for 65% and air weight account for 35% mist pressurization 0.08MPa, the rotating speed of cold quenching roller 2 is 3m/s, gained silver alloy beam thickness is 0.5mm.
Be oxidized to the band that silver and zinc oxide mix in the II silver alloy band
At 750 ℃, zinc oxide evenly distributed in silver matrix the oxygen pressure of 0.2Mpa with the oxidation of silver alloy band in following 18 hours, and the zinc oxide particle is less than or equal to 3 μ m.
The band Mechanical Crushing briquetting routinely that III silver and zinc oxide mix is squeezed into wire rod or sheet material under the pressure of 850 ℃ temperature, 200MPa, reprocess to be contact material.Material hardness (HV0.3) is: 110.
The I quick quenching technique obtains the silver-cadmium alloy band
Silver 89%, cadmium 11% are fused into the silver alloy of molten condition in intermediate frequency furnace.1050～1500 ℃ of smelting temperatures behind the metal melting, are incubated 10 minutes again.
The silver alloy of molten condition is got rid of band machine acquisition silver alloy band with single roller rapid quenching.Getting rid of the band machine nozzle is minor axis 2mm, major axis 7mm ellipse; In the fast quenching process, with argon gas weight account for 95% and air weight account for 5% gas pressurized 0.02MPa, the rotating speed of cold quenching roller is 30m/s, gained silver alloy beam thickness is 0.1mm.
Be oxidized to the band that silver and cadmium oxide mix in the II silver alloy band
At 600 ℃, cadmium oxide evenly distributed in silver matrix the oxygen pressure of 0.1Mpa with the oxidation of silver alloy band in following 12 hours, and the cadmium oxide particle is less than or equal to 5 μ m.
The band Mechanical Crushing briquetting routinely that III silver and cadmium oxide mix is squeezed into wire rod or sheet material under the pressure of 850 ℃ temperature, 200MPa, reprocess to be contact material.Material hardness (HV0.3) is: 100.
Claims (9)
1, a kind of manufacture method of high temperature resistant silver oxide contact tip material is characterized in that comprising the steps:
The I quick quenching technique obtains the silver alloy band, with percentage by weight is in tin 2%～18%, zinc 2%～15%, cadmium 8%～20%, bismuth 0.1%～5%, copper 0.1%～15%, indium 0.1%～8% and the iron 5%～15% any one or more, surplus is that the metal melting of silver forms silver alloy, 1050～1500 ℃ of smelting temperatures; The silver alloy of molten condition gets rid of the band machine with single roller rapid quenching and obtains the silver alloy band;
II alloy inner oxidation method routinely carries out interior oxidation to the silver alloy band, obtains the band that silver and oxide mix;
The band Mechanical Crushing briquetting according to a conventional method that III silver and oxide mix is squeezed into wire rod or sheet material, reprocesses to be final contact material.
2, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 1 is characterized in that:
To get rid of the rotating speed that the band machine obtains the cold quenching roller of silver alloy band be 3m/s～30m/s to single roller rapid quenching among the described step I.
3, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 1 and 2 is characterized in that:
After the metal melting of described step I in intermediate frequency furnace forms alloy, be incubated 10～30 minutes again.
4, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 1 and 2 is characterized in that:
The nozzle that the used fast quenching of described step I gets rid of the band machine is oval outlet, its minor axis 2～5mm, major axis 7～15mm.
5, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 1 and 2 is characterized in that:
Described step I gained silver alloy beam thickness is 0.1～0.5mm.
6, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 1 and 2 is characterized in that:
In the fast quenching process of described step I, with the mist pressurising of air and argon gas, wherein to account for the total weight ratio be 5～35% to air.
7, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 6 is characterized in that:
In the fast quenching process of described step I, the total pressure of air and argon gas is 0.02～0.08Mpa during pressurising.
8, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 1 and 2 is characterized in that:
In the described Step II, the silver alloy band is at 500～750 ℃, the silver alloy band is oxidized in 12～24 hours the band of silver and oxide mixing under the oxygen pressure of 0.1～10Mpa.
9, the manufacture method of high temperature resistant silver oxide contact tip material according to claim 8 is characterized in that:
Metal oxide evenly distributes in silver matrix in the band that gained silver and oxide mix, and oxide particle is of a size of and is less than or equal to 5 μ m.
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| CN101777438B (en) * | 2010-01-26 | 2014-08-13 | 上海中希合金有限公司 | High-performance silver cadmium oxide material and manufacturing method thereof |
| CN102031438A (en) * | 2010-12-31 | 2011-04-27 | 桂林电器科学研究院 | Sliver stannic oxide electrical contact material and preparation method thereof |
| CN104493178B (en) * | 2014-12-30 | 2016-09-14 | 桂林电器科学研究院有限公司 | A kind of processing method of the silver zinc oxide electrical contact material containing additive |
| CN108511246A (en) * | 2018-05-28 | 2018-09-07 | 北京梦之墨科技有限公司 | A kind of thin film switch and preparation facilities and method using screen printing mode preparation |
| CN109518029B (en) * | 2018-12-19 | 2021-02-02 | 昆明理工大学 | Preparation method of Ag-graphene electrical contact material |
| CN110983096A (en) * | 2019-12-07 | 2020-04-10 | 福达合金材料股份有限公司 | Method for preparing silver matrix oxide electric contact material by internal oxidation method capable of improving fusion welding resistance |
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