CN1062928A - The metallurgical contact alloy of tungsten-copper-silver-nickel by powder - Google Patents
The metallurgical contact alloy of tungsten-copper-silver-nickel by powder Download PDFInfo
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- CN1062928A CN1062928A CN 90106491 CN90106491A CN1062928A CN 1062928 A CN1062928 A CN 1062928A CN 90106491 CN90106491 CN 90106491 CN 90106491 A CN90106491 A CN 90106491A CN 1062928 A CN1062928 A CN 1062928A
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Abstract
A kind of powder metallurgy contact alloy of using in the high-current electrical equipment switch contact, particularly enclosed environment of being used for, the W-Cu-Ag-Ni alloy (is called for short AW
50Alloy), the present invention designs a binary solid solution quaternary system alloy according to Principles of Metallography, with powder metallurgy technology and optimal processing parameter, in the W-Cu-Ni composite powder, add silver powder in proportion and induce metal, form, have strong oxidation-resistance through the infiltration sintering as skeleton, low temperature rise, arc quenching effect is good, and the direct current breaking capacity is strong, reaches 80KA/440V, arc time is short, is generally Ag-W
401/2~1/3, electric life is long, compares Ag-W
40High 4~7 times, and comparable Ag-W
40Joint silver 12~20%.
Description
The present invention relates to a kind of powder metallurgy contact alloy that is used for the high-current electrical equipment switch.
At present, be used for the contact material of the big electric current of conduct on the electric installation, Agcdo (Ag-CdO) series and silver-colored tungsten (Ag-W) series are generally arranged.The decomposition of Ag-CdO series CdO pollutes the environment, and is unwell in enclosed environment and uses; That employing is maximum in the Ag-W series is Ag-W
40, its direct current breaking capacity has only 40KA/440V, can not satisfy the needs of big electric current, and the tungsten oxidation causes contact resistance to increase the electrical equipment poor work stability.
In order to overcome above deficiency, make the electric installation switch contact not only be applicable to enclosed environment, but also have high direct current breaking capacity, special the present invention proposed.
Alloy composition of the present invention is (weight percentage): W:49~51%, Ag:42~44%, Cu:4~5.5%, Ni:0.5~1.5%.
Produce the metallurgical contact alloy of tungsten-copper-silver-nickel by powder and (be called for short AW
50Alloy), the present invention adopts powder metallurgy process to prepare the W-Cu-Ni composite powder, be dispensed into silver powder and induce metal by alloy model, one-tenth as skeleton, with mold pressing or isostatic pressing, make the W-Cu-Ag-Ni skeleton pressed compact that obtains to have certain porosity, the skeleton pressed compact is at 1050~1250 ℃ of infiltration silver, homogenizing thermal treatment subsequently, promptly can be made into have high direct current breaking capacity, oxidation resistant W-Cu-Ag-Ni quaternary system alloy.
The invention will be further described below in conjunction with accompanying drawing:
Fig. 1 is technological process of production figure of the present invention.
Fig. 2 is sintering dress boat mode.
Fig. 3: AW50 is through three contact surface metallographs of D.C80KA/500V break-make.Amplify 1 times.
Fig. 4: Ag-W40 is through D.C60KA/500V break-make one-time contact surface metallograph.Amplify 1 times.
Alloy production technological process of the present invention is as follows:
1.W-Cu-Ni producing of composite powder
W powder (hydrogen reduction method is produced, the r pine: 2.8~3.4, meet the CEMENTED CARBIDE PRODUCTION technical qualification) is mixed with nickel nitrate aqueous solution, be heated to 70~100 ℃ of oven dry, the pyrolysis reduction is 1~1.5 hour in 800~850 ℃ of hydrogen atmospheres, the W-Ni composite powder; W-Ni composite powder and copper chloride solution are mixed into pasty state, heating, drying, the pyrolysis reduction is 1~1.5 hour in 460~500 ℃ of hydrogen, gets the W-Ni-Cu composite powder, crosses 100 mesh sieves.
2. the preparation of skeleton material
Add in the W-Cu-Ni composite powder after crossing 100 orders 21~24% induce silver (200 order) as skeleton material (skeleton material account for finished product gross weight 75~81%), add 0.5% stearic acid again, in V-type blender or other mixing equipment, mixed 2~8 hours, obtain the skeleton compound.To the compression moulding of skeleton compound, the size and the substance of control briquetting guarantee that matrix porosity is 17~20% in the pressing process by hydropress.
3. infiltration sintering
The infiltration sintering of skeleton pressed compact and infiltration silver bullion (adopting 99.5% silver powder grain or bits sheet) carries out in molybdenum wire furnace (10~15KW, 1100~1500 ℃).Fig. 2 is sintering dress boat mode, wherein, and 1-infiltration silver bullion, 2-skeleton pressed compact, 3-Al
2O
3Filler.Infiltration silver bullion 1 also can be placed on the below of skeleton briquetting 2.Infiltration sintering hydrogen or cracked ammonium are as protective atmosphere, and the infiltration sintering temperature is 1050~1250 ℃, and soaking time is 45~60 minutes.Insulation is 30~45 minutes when being cooled to 990~1010 ℃, its objective is to make the thick Ag layer of the uniform one deck 0.2~0.5mm of alloy surface, and welding is carried out easily, improves use properties.
4. homogenizing thermal treatment
The goods that infiltration sinters are put into box temperature automatically controlled stove, heat in air, temperature is 380~400 ℃, and the time is 12~24 hours.
With AW
50And Ag-W
40Alloy is installed in respectively on the DW-440V series heavy DC switch (isolating switch), and connection 10KA/500V, 20KA/500V, 40KA/500V, 60KA/500V, 80KA/500V grade experimentize.AW
50Alloy is smoothly by all rank test (each break-make three times), and test back contact is smooth, as Fig. 3 (amplifying 1 times).Ag-W
40Only by 40KA/500V, when entering 60KA/600V, break and once promptly can't connect, the contact surface serious burn is as Fig. 4.
AW
50Alloy and Ag-W
40The alloy physics performance is compared as follows:
Alloy designations composition process characteristic density hardness resistivity
kg/mm
210
-6Ωcm
Ag-W40 40%W, 60%Ag Ag powder+W powder, machinery mixes 12.51 90 0.25
Close compacting, sintering, the multiple pressure
AW50 50%W, 43%Ag, preparation W-Ni-Cu compound 13.00 115 0.27
The 7%Cu+Ni powder, the infiltration sintering
Ag-W series is a kind of not molten mutually mutually pseudoalloy, but Ni, Cu and W at high temperature have certain melting degree.After in the Ag-W alloy, adding Cu, Ni, can improve Ag, form Cu, Ni phase Solid solution coating W particle simultaneously, around the W particle, form the quad alloy tissue, help W particle antioxidant property W particulate wettability.Adopt leaching technology, improved the density and the compactness of alloy, thereby improved the electrical and thermal conductivity performance of alloy, reduced contact temperature rise.Oxide treatment in adopting, the arc quenching effect of enhancing contact alloy.With Ag-W
40Relatively, the present invention (AW
50Alloy) have following characteristics: the direct current breaking current is 80KA/440V, is Ag-W
40Two times, and do not produce objectionable impurities during disjunction, be suitable in enclosed environment, using; The face contact resistance is stable, and temperature rise is low, and the erosion of the anti-ocean of energy humid weather does not have the three wastes, pollution-free, nuisanceless in process of production, has both satisfied the particular requirement of using in enclosed environment, can replace Ag-W yet
40Use on other electric switch, performance is more excellent; Arc time is short, saves cost, than Ag-W
40Joint silver 12~20%.
Claims (2)
1, a kind of powder metallurgy contact alloy is characterized in that consisting of (weight): W: 49~51%, and Ag: 42~44%, Ni: 0.5~1.5%, Cu: 4.0~5.5%.
2, the method for the described alloy of a kind of production claim 1 is characterized in that,
A〉produce W-Cu-Ni composite powder and W-Cu-Ag-Ni skeleton material with powder metallurgy process;
B〉composite powder skeleton forming pressed compact porosity is 17~20%;
C〉the infiltration sintering temperature is 1050~1250 ℃, and soaking time is 45~60 minutes, and when sintering was cooled to 990~1010 ℃, soaking time was 30~45 minutes;
D〉the homogenizing heat-treat condition is to heat in air, and temperature is 380~400 ℃, and soaking time is 12~24 hours.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 90106491 CN1022424C (en) | 1990-12-28 | 1990-12-28 | Spindle alloy of tungsten-copper-silver-nickel by powder metallurgy |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN 90106491 CN1022424C (en) | 1990-12-28 | 1990-12-28 | Spindle alloy of tungsten-copper-silver-nickel by powder metallurgy |
Publications (2)
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CN1062928A true CN1062928A (en) | 1992-07-22 |
CN1022424C CN1022424C (en) | 1993-10-13 |
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CN 90106491 Expired - Fee Related CN1022424C (en) | 1990-12-28 | 1990-12-28 | Spindle alloy of tungsten-copper-silver-nickel by powder metallurgy |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1056464C (en) * | 1997-05-05 | 2000-09-13 | 冶金工业部钢铁研究总院 | Vacuum load switch contact material and its mfg. method |
CN101651050B (en) * | 2009-07-20 | 2011-07-20 | 温州宏丰电工合金股份有限公司 | Submicron particle reinforced Ag-based electrical contact material and preparation method thereof |
CN102392170A (en) * | 2011-11-11 | 2012-03-28 | 扬州乐银合金科技有限公司 | Processing method for manufacturing silver tungsten composite contact material |
CN102430755A (en) * | 2011-12-30 | 2012-05-02 | 浙江天银合金技术有限公司 | Process for manufacturing sliver-nickel composite silver-nickel-copper electrical contact |
CN102800513A (en) * | 2012-08-10 | 2012-11-28 | 佛山通宝精密合金股份有限公司 | Preparation method for preparing silver nickel materials by means of electrical contacts |
CN103247450A (en) * | 2013-04-22 | 2013-08-14 | 浙江天银合金技术有限公司 | Electrical contact |
CN104078249A (en) * | 2014-05-16 | 2014-10-01 | 浙江天银合金技术有限公司 | Silver copper tungsten electrical contact and processing technology thereof |
CN105364075A (en) * | 2014-08-29 | 2016-03-02 | 优美科科技材料(苏州)有限公司 | Manufacturing method for long-bar-shaped fine-grain copper-tungsten contact |
CN108213762A (en) * | 2018-01-17 | 2018-06-29 | 宁国市顺鑫金属制品有限公司 | A kind of high rigidity mash welder soldering tip and preparation method thereof |
-
1990
- 1990-12-28 CN CN 90106491 patent/CN1022424C/en not_active Expired - Fee Related
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1056464C (en) * | 1997-05-05 | 2000-09-13 | 冶金工业部钢铁研究总院 | Vacuum load switch contact material and its mfg. method |
CN101651050B (en) * | 2009-07-20 | 2011-07-20 | 温州宏丰电工合金股份有限公司 | Submicron particle reinforced Ag-based electrical contact material and preparation method thereof |
CN102392170A (en) * | 2011-11-11 | 2012-03-28 | 扬州乐银合金科技有限公司 | Processing method for manufacturing silver tungsten composite contact material |
CN102430755A (en) * | 2011-12-30 | 2012-05-02 | 浙江天银合金技术有限公司 | Process for manufacturing sliver-nickel composite silver-nickel-copper electrical contact |
CN102430755B (en) * | 2011-12-30 | 2013-01-30 | 浙江天银合金技术有限公司 | Process for manufacturing sliver-nickel composite silver-nickel-copper electrical contact |
CN102800513A (en) * | 2012-08-10 | 2012-11-28 | 佛山通宝精密合金股份有限公司 | Preparation method for preparing silver nickel materials by means of electrical contacts |
CN102800513B (en) * | 2012-08-10 | 2015-11-25 | 佛山通宝精密合金股份有限公司 | A kind of preparation method of used as electric contacts silver nickel material |
CN103247450A (en) * | 2013-04-22 | 2013-08-14 | 浙江天银合金技术有限公司 | Electrical contact |
CN104078249A (en) * | 2014-05-16 | 2014-10-01 | 浙江天银合金技术有限公司 | Silver copper tungsten electrical contact and processing technology thereof |
CN105364075A (en) * | 2014-08-29 | 2016-03-02 | 优美科科技材料(苏州)有限公司 | Manufacturing method for long-bar-shaped fine-grain copper-tungsten contact |
CN108213762A (en) * | 2018-01-17 | 2018-06-29 | 宁国市顺鑫金属制品有限公司 | A kind of high rigidity mash welder soldering tip and preparation method thereof |
CN108213762B (en) * | 2018-01-17 | 2020-03-31 | 宁国市顺鑫金属制品有限公司 | Welding head for high-hardness spot welding machine and preparation method thereof |
Also Published As
Publication number | Publication date |
---|---|
CN1022424C (en) | 1993-10-13 |
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