CN103208375B - A kind of copper alloy contact material for alternating current contactor and preparation method thereof - Google Patents
A kind of copper alloy contact material for alternating current contactor and preparation method thereof Download PDFInfo
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- CN103208375B CN103208375B CN201310121084.XA CN201310121084A CN103208375B CN 103208375 B CN103208375 B CN 103208375B CN 201310121084 A CN201310121084 A CN 201310121084A CN 103208375 B CN103208375 B CN 103208375B
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Abstract
The present invention relates to a kind of copper alloy contact material for alternating current contactor and preparation method thereof, contact material is taking copper Cu as matrix, taking metal molybdenum Mo as framework material, taking sodium carbonate as arc quenching material, also have in addition silver-colored Ag and lanthanum La, its compositing formula is expressed as by percetage by weight: molybdenum Mo1%-20%; Sodium carbonate 0.5%-10%; Silver Ag? 2.5%-5%; Lanthanum La? 0.01%-0.5% and surplus are copper, and method is: lanthanum powder is evenly mixed with copper powder, then sodium carbonate powder is placed in to the rear kept dry of drying box baking; By lanthanum/copper alloy complex, molybdenum powder, silver powder and powdered sodium carbonate in proportion, adopt dry pigmentation to mix; By static pressure ingot blanks such as the powder compaction one-tenth mixing; By ingot blank there being sintering in protective atmosphere high temperature furnace; The ingot blank that sintering is gone out is pressed into sheet material or wire rod. Contact material prepared by the present invention has good conductivity, contact resistance is low, the advantage of resistance to ablation, resistance to oxidation, anti-melting welding.
Description
Technical field
The present invention relates to a kind of copper alloy contact material for alternating current contactor and preparation method thereof.
Background technology
In recent years, along with the continuous progress of scientific and technical development and people's quality of life, A.C. contactor existsApplication in life is more and more extensive, also more and more receives people's concern. A.C. contactor has nothing in our lifeThe effect that method is alternative. But existing A.C. contactor is used copper alloy contact material in use, in the effect of electric arcUnder, working surface is oxidizable, and contact resistance is high, causes temperature rise, affects service life, and its performance also has much room for improvement. ExistingCopper alloy contact material, according to the effect of its constituent element, can be divided into constituent element five classes. Wherein the first kind is matrix, the main conduction that risesEffect, acid bronze alloy is mainly taking copper as matrix; Equations of The Second Kind is anti-ablation, the anti-stick framework material closing, and generally has tungsten W, graphite CDeng; The 3rd class is to have the arc quenching material that suppresses or reduce electric arc generation effect, is mainly oxide or halide etc., as oxidationTin SnO2, cadmium oxide CdO etc.; The main landing low contact resistance of the 4th class or improve material wetability be beneficial to preparation effect,As a small amount of silver-colored Ag, nickel etc.; The 5th class is antioxidation, is mainly rare earth element, as lanthanum, cerium or mishmetal etc.Aforesaid five class constituent elements, in actual product or formula, except first kind constituent element, that is beyond copper matrix seldom changes, other kindsClass constituent element can have the difference of content and kind to change. But anyway change, wherein the most important thing is Equations of The Second Kind and the 3rd classConstituent element is indispensable.
In the present invention, propose using inorganic salts as arc quenching material, its arc extinguishing mechanism is under arc temperature, inorganic saltsA large amount of heat is taken away in vaporization rapidly, makes rapidly arc temperature reduce, thereby plays arc extinguishing effect. Visible its mechanism and oxygen in the pastCompound or halide have a great difference, and the latter mostly is decomposition. The present invention chooses the sodium carbonate (Na2CO3) of dehydration as arc quenching agent,Its fusing point is 851 degrees Celsius, and vapourizing temperature is 1600 degrees Celsius, and the heat absorption of vaporizing rapidly in the time that electric arc produces temperature, possesses excellentThe attribute of different arc quenching material. A small amount of sodium carbonate of vaporization is nontoxic to surrounding environment simultaneously. The melt temperature of sodium carbonate in additionBe 851 degrees Celsius, under copper-base contact material processing temperature, can present molten condition, therefore need the mixed powder of dry method and temperature control extrudingTechnique.
Summary of the invention
The object of the invention is to provide that one has good conductivity, contact resistance is low, resistance to ablation, resistance to oxidation, anti-melting welding etc.Copper alloy contact material for alternating current contactor of advantage and preparation method thereof.
The object of the present invention is achieved like this:
A kind of copper alloy contact material for alternating current contactor, taking copper Cu as matrix, taking metal molybdenum Mo as framework material, with carbonAcid sodium is arc quenching material, also has in addition silver-colored Ag and lanthanum La, and its compositing formula is expressed as by percetage by weight: molybdenum Mo1%-20%; CarbonAcid sodium 0.5%-10%; Silver Ag2.5%-5%; Lanthanum La0.01%-0.5% and surplus are copper.
The present invention also has following feature:
1, a preparation method for copper alloy contact material for alternating current contactor is as follows:
(1), first lanthanum powder and copper powder are mixed equably with the mixed powder machine of ball milling, particle size range is 1-30 micron;
(2), sodium carbonate powder be placed in to drying box toast 120 minutes, baking temperature is 200 degrees Celsius, then dry guarantorDeposit;
(3), mixed lanthanum/copper alloy complex, molybdenum powder, silver powder and powdered sodium carbonate are pressed to formula rate, with evenMix, mix adopt dry pigmentation, do not add water;
(4), the powder mixing is pressed under the pressure of thousand Ns/square metre of 200-400 etc. to static pressure ingot blank;
(5), by etc. static pressure ingot blank sintering 1-1.5 hour in the high temperature furnace that has protective atmosphere, sintering temperature is 800-840℃；
(6) ingot blank, sintering being gone out is pressed into sheet material or wire rod.
2, the preparation method of another copper alloy contact material for alternating current contactor is as follows:
(1), first molybdenum powder and copper powder are mixed to the rear molten alloy that is made into according to formula rate equably with mixer, soAfter take the method for spray deposition to make molybdenum/copper alloy micro mist that particle size diameter is 10-30 micron;
(2), molybdenum/copper alloy micro mist and silver powder, lanthanum powder, powdered sodium carbonate by formula rate with mixing equably,Mix and adopt dry pigmentation, do not add water;
(3), the powder mixing is placed in to drying box, at 200 DEG C dry 3 hours;
(4), the powder mixing is pressed under the pressure of 200,000 Ns/square metre etc. to static pressure ingot blank;
(5), by etc. static pressure ingot blank sintering 1 hour in the high temperature furnace that has protective atmosphere, sintering temperature is 820 DEG C;
(6) ingot blank, sintering being gone out is pressed into sheet material or wire rod.
3, the preparation method of another copper alloy contact material for alternating current contactor is as follows:
(1), first powdered sodium carbonate is placed in to the drying box of 200 DEG C, drying and dehydrating 120 minutes;
(2), by even with mixer according to formula rate to molybdenum powder, copper powder, silver powder, dried powdered sodium carbonate and lanthanum powderMix, mix adopt dry pigmentation, do not add water;
(3), the powder mixing is pressed under the pressure of 300,000 Ns/square metre etc. to static pressure ingot blank;
(4), by etc. static pressure ingot blank sintering 1.2 hours in the high temperature furnace that has protective atmosphere, sintering temperature is 830 DEG C;
(5) ingot blank, sintering being gone out is pressed into sheet material or wire rod.
4, above-described protective atmosphere, refers to and is specially the atmosphere of reproducibility and passes into hydrogen or cover with charcoal powder.
Copper alloy contact material for alternating current contactor of the present invention has good conductivity, contact resistance is low, resistance to ablation,The advantage such as resistance to oxidation, anti-melting welding, can well be applied to copper alloy contact material for alternating current contactor.
Detailed description of the invention
The invention will be further described below:
Embodiment 1
A kind of copper alloy contact material for alternating current contactor, taking copper Cu as matrix, taking metal molybdenum Mo as framework material, with carbonAcid sodium is arc quenching material, also has in addition silver-colored Ag and lanthanum La, and its compositing formula is expressed as by percetage by weight: molybdenum Mo1% ~ 20%; CarbonAcid sodium 0.5% ~ 10%; Silver Ag2.5% ~ 5%; Lanthanum La0.01% ~ 0.5% and surplus are copper.
Embodiment 2
The preparation method of a kind of copper alloy contact material for alternating current contactor as above is as follows:
(1), first lanthanum powder and copper powder are mixed equably with the mixed powder machine of ball milling, particle size range is 1 ~ 30 micron;
(2), sodium carbonate powder be placed in to drying box toast 120 minutes, baking temperature is 200 degrees Celsius, then dry guarantorDeposit;
(3), by mixed lanthanum/copper alloy complex, molybdenum powder, silver powder and powdered sodium carbonate in proportion, equal with mixerMix evenly, mix and adopt dry pigmentation, do not add water;
(4), the powder mixing is pressed under thousand Ns/square metre of 200-400 etc. to static pressure ingot with cold isostatic pressBase;
(5), by etc. static pressure ingot blank sintering 1-1.5 hour in the high temperature furnace that has protective atmosphere, sintering temperature is 800-840℃；
(6) ingot blank, sintering being gone out is sent to and in extruder, squeezes out sheet material or wire rod.
Embodiment 3
The preparation method of a kind of copper alloy contact material for alternating current contactor as above is as follows:
(1), first molybdenum powder and copper powder are mixed to the rear molten alloy that is made into according to formula rate equably with mixer, soAfter to take the method for spray deposition to make particle size diameter be molybdenum/copper alloy micro mist of 10 ~ 30 microns;
(2), molybdenum/copper alloy micro mist and silver powder, lanthanum powder, powdered sodium carbonate mix with mixer equably by above-mentioned formula rateBe combined, mix and adopt dry pigmentation, do not add water;
(3), the powder mixing is placed in to drying box, at 200 DEG C dry 3 hours;
(4), the powder mixing is pressed under 200,000 Ns/square metre etc. to static pressure ingot blank with cold isostatic press;
(5), by etc. static pressure ingot blank sintering 1 hour in the high temperature furnace that has protective atmosphere, sintering temperature is 820 DEG C;
(6) ingot blank, sintering being gone out is sent to and in extruder, squeezes out sheet material or wire rod.
Embodiment 4
The preparation method of a kind of copper alloy contact material for alternating current contactor as above is as follows:
(1), first powdered sodium carbonate is placed in to the drying box of 200 DEG C, drying and dehydrating 120 minutes;
(2), by molybdenum powder, copper powder, silver powder, dried powdered sodium carbonate and lanthanum powder according to above-mentioned formula rate mixerMix equably, mix and adopt dry pigmentation, do not add water;
(3), the powder mixing is pressed under 300,000 Ns/square metre etc. to static pressure ingot blank with cold isostatic press;
(4), by etc. static pressure ingot blank sintering 1.2 hours in the high temperature furnace that has protective atmosphere, sintering temperature is 830 DEG C;
(5) ingot blank, sintering being gone out is sent to and in extruder, squeezes out sheet material or wire rod.
The protective atmosphere that the present embodiment 2-4 uses, refers to the atmosphere of reproducibility, such as passing into hydrogen, or with charcoalPowder covers.
During innovative point of the present invention is, introduce first inorganic salts material, as vaporization arc extinguishing constituent element, break through people in the pastThe alloy constituent element in brains must " solid-state ", the thinking restriction such as " water insoluble ", successfully adopt sodium carbonate, and control and make it pointFall apart in powdered metallurgical material, play the effect of cooling arc extinguishing. Sodium carbonate also has the feature that contact resistance is low simultaneously, is usingIn process, the enrichment of contact surface not only can not increase contact resistance, and is conducive to the continuity of disjunction and destruction oxide-film,The overall contact resistance that makes slider material surperficial reduces greatly;
In the present invention, in the time of sintering, even if temperature exceedes sodium carbonate fusing point, because sodium carbonate amount is few, and be uniformly dispersed,Assemble without macroscopic view, be extruded again the sealing of rear surrounding tissue, the situation such as therefore also can not trickle, overflow, ensures the complete of materialWhole property and usability subsequently.
Prepare Seesaw type monopole switch (16A, 250V) with this kind of material and carry out performance test, testing standard referenceGB16915.1, main performance index is as follows:
1. temperature rise index: three groups of result of the tests are 37K, 40K, 35K, are all no more than 45K, and result of the test is for passing through.
2. make-break capacity: three groups of result of the tests are 52,000 times, 61,000 times, 57,000 times, all exceeds 40,000 timesAcceptance line, result of the test is for passing through.
Above result shows, this kind of material has great application prospect in the extensive use field of contact product.
Claims (2)
1. a copper alloy contact material for alternating current contactor, is characterized in that: taking copper Cu as matrix, taking metal molybdenum Mo as skeletonMaterial, taking sodium carbonate as arc quenching material, also have in addition silver-colored Ag and lanthanum La, its compositing formula is expressed as by percetage by weight: molybdenum Mo1%, sodium carbonate 10%, silver-colored Ag5%, lanthanum La0.01% and surplus are copper.
2. the preparation method of a kind of copper alloy contact material for alternating current contactor according to claim 1, is characterized in that,Method is as follows:
(1), first powdered sodium carbonate is placed in to the drying box of 200 DEG C, drying and dehydrating 120 minutes;
(2), that molybdenum powder, copper powder, silver powder, dried powdered sodium carbonate and lanthanum powder is mixed equably with mixer according to formula rateBe combined, mix and adopt dry pigmentation, do not add water;
(3), the powder mixing is pressed under the pressure of 300,000 Ns/square metre etc. to static pressure ingot blank;
(4), by etc. static pressure ingot blank sintering 1.2 hours in the high temperature furnace that has protective atmosphere, sintering temperature is 830 DEG C;
(5) ingot blank, sintering being gone out is pressed into sheet material or wire rod.
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| CN201310121084.XA CN103208375B (en) | 2013-04-09 | 2013-04-09 | A kind of copper alloy contact material for alternating current contactor and preparation method thereof |
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| DD100106A1 (en) * | 1972-10-26 | 1973-09-05 | ||
| JPS60121244A (en) * | 1983-11-30 | 1985-06-28 | Matsushita Electric Works Ltd | Electrical contact material |
| CN101651054B (en) * | 2009-09-11 | 2012-11-21 | 昆明理工大学 | Preparation method of modified AgSnO2 electric contact material |
| CN102102157A (en) * | 2009-12-18 | 2011-06-22 | 谷文伟 | Multicomponent composite copper alloy electrical contact material |
| CN102286740A (en) * | 2011-07-22 | 2011-12-21 | 辽宁金力源新材料有限公司 | Method for preparing tungsten copper or molybdenum copper high-voltage contact material through direct forming |
| CN102304658A (en) * | 2011-08-25 | 2012-01-04 | 哈尔滨东大高新材料股份有限公司 | Copper alloy contact material for alternating current contactor and preparation method thereof |
| CN102306558A (en) * | 2011-08-25 | 2012-01-04 | 哈尔滨东大高新材料股份有限公司 | Copper alloy electric contact material for low-voltage electrical device and preparation method of copper alloy electric contact material |
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