CN1353203A - High-strength copper alloy with high electric conductivity for electrode welder - Google Patents
High-strength copper alloy with high electric conductivity for electrode welder Download PDFInfo
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- CN1353203A CN1353203A CN 01133399 CN01133399A CN1353203A CN 1353203 A CN1353203 A CN 1353203A CN 01133399 CN01133399 CN 01133399 CN 01133399 A CN01133399 A CN 01133399A CN 1353203 A CN1353203 A CN 1353203A
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Abstract
A high-strength Cu-alloy with high electric conductivity used for electrode of welder contains Cr (0.1-0.4 wt.%), B (0.08-0.30), Mg (0.08-0.65), Zn (0.3-1.2), Nb (0.02-0.08), Re (0.05-0.15), and Cu and unavoidable impurity (the rest), and is prepared through casting, forging, solid dissolving, cold deforming, and ageing. Its advantages include high strength, high electric conductivity, and good oxidizing resistance.
Description
Technical field
The invention belongs to the copper alloy field, particularly a kind of high strength, high conductivity copper alloy that is used for electrode welder.
Background technology
Cold rolled strip must be with welding machine welding two winding steel end to end before entering mill milling.Electrode is the critical material in the welding machine welding process, and its effect is to provide electric current and pressure simultaneously to welded part.During welding, because the different size and the requirement of welded part, the electric current that passes through on the electrode is from tens of amperes to tens thousand of amperes, pressure from several hectonewtons to several ten thousand newton, and be to bear pressure at electric current simultaneously by producing pyritous, so electrode materials must have high conductivity, higher hardness and intensity.If the oxidation-resistance of copper alloy is poor, then electrode can generate oxide film in the surface in the course of the work, cause electrode surface resistance to raise, and then cause the temperature rise of electrical equipment too high, so electrode also must have good oxidation-resistance.
For satisfying above-mentioned performance requriements, the butt welding machine electrode has been done a lot of research work with Cu alloy material both at home and abroad.Patent CN85107530 provides a kind of electrode copper alloy, its alloying constituent weight percent is: Zr 0.1-0.25%, Mg 0.02-0.07%, Nb 0.06-0.15%, Re (La+Ce) 0.02-0.06%, all the other are copper, through casting, forge pull out, after the solution treatment, cold deformation, electric conductivity is 90～97%IACS (IACS is international tough pitch copper standard, and 100%IACS equals the electric conductivity of 100% fine copper), and hardness is 60～72HRB.Patent CN1115789 provides a kind of electrical element that is applicable to have the copper alloy of high-strength and high-conductivity, and its alloying constituent weight percent is: Cr 0.05～0.4%, Zr 0.03-0.25%, and Fe 0.1～0.18%, Ti0.1-0.8%, all the other are copper.Through casting, hot rolling, solution treatment, cold rolling, timeliness, eliminate stress after, electric conductivity is 50%IACS, intensity 〉=637MPa.Patent CN1260403 provides a kind of copper alloy with high-strength and high-conductivity, its alloying constituent weight percent is: Cr≤1.0%, Zr 0.05～0.4%, M 0.1～1.0% (M is selected from Co, Fe, Ni), additive≤5% (being selected from Nb, V, Sn, Pb, Bi, Mn, Mg, B, Al, Ca, Li), all the other are copper.After casting, hot rolling, cold rolling, annealing, solution treatment, cold rolling, ageing treatment, electric conductivity 70%IACS, yield strength 549MPa.
The patent of above-mentioned patent and other relevant copper alloys is used as the copper alloy electric conductivity height of electrode, and then intensity is low, the intensity height, and then electric conductivity is influenced, and after electric conductivity and the strength balance coupling, does not relate to this parameter of oxidation-resistance again.Thereby the copper alloy that relates to of these patents can not satisfy the requirement of electrode welder material well.
Summary of the invention
The purpose of this invention is to provide a kind of new copper alloy and manufacture method thereof that is used for the flash welding electrode welder.
This Albatra metal-is the precipitation hardenable copper alloy, realize in the following way: at first by in copper, adding Cr, B, Mg, Zn, Nb, Re alloy, the weight percent of its alloy is: Cr 0.1～0.4%, B 0.08～0.30%, Mg 0.08～0.65%, Zn 0.3-1.2%, Nb0.02～0.08%, Re 0.05～0.15%, and all the other are copper and unavoidable impurities.Through technology manufacturings such as melting, ingot casting, forge hot, solution treatment, cold deformation, ageing treatment.This alloy not only has excellent conducting performance, the advantages of high strength under room temperature and the working temperature, but also have good oxidation-resistance.
The present invention is according to polynary a spot of composite alloying principle, promptly add the good alloying element of multiple solid solution strengthening effect, and the amount of every kind of element is less or seldom, make the complicated componentization of sosoloid, to increase the resistance of atomic diffusion, thereby recrystallization temperature is raise, but not obvious reduction alloy melting point, and have the principle of higher diffusion activation energy.Adopt multiple reinforcement approach, make alloy when having high strength and hardness, keep higher electric conductivity, this is key problem in technology of the present invention place.Therefore, the key that realizes the object of the invention is to select those alloying elements and their weight proportion, and the adjustment of processing parameter.
Generally speaking, the electric conductivity of copper alloy and intensity are a pair of conflicting technical indicators, the electric conductivity height, and then intensity reduces, the intensity height, then electric conductivity reduces.Address this problem, must start with from correlative factor.Fine copper has good electroconductibility, but its intensity is not high, only be 225～235MPa, to further improve the intensity of copper, the element that sharply reduces with regard to adding the reduction of some solubility with temperature in copper, make its alloying, but these elements add the electric conductivity that affiliation reduces alloy in various degree, for example: in fine copper, add 0.02% aluminium, 0.1% nickel, 0.1% zinc, 0.1% silicon respectively, if the electric conductivity with fine copper is 100%, then the electric conductivity behind the addition element will drop to 95%, 94%, 95%, 50% respectively.Therefore, the alloying principle of copper alloy of the present invention is to obtain the high-intensity while, reducing the reduction of electric conductivity as far as possible.Consider that in copper when alloying element formed compound, the single respective element that the damage ratio of electric conductivity is added the phase equal size respectively was little to the infringement of electric conductivity.Therefore, alloying element is present in the copper matrix with compound form basically, when alloy is heated to certain temperature that is lower than fusing point, these compound fusions, be solidly soluted in the matrix and go, put into then that chilling makes compound have little time to separate out in the medium, make copper alloy at room temperature keep hypersaturated state, make supersaturated solid solution that precipitation takes place at a certain temperature again and decompose, promptly precipitation is decomposed.A large amount of precipitation particle highly disperseds are distributed in the matrix, and such alloy not only has higher intensity and hardness, also have excellent conducting performance.
Its manufacturing process of copper alloy that realizes content of the present invention is as follows:
1. prescription cast copper alloy provided by the invention;
2. B adds with the master alloy that contains B2%;
3. copper alloy is heated to 850～900 ℃, is incubated to forge after 1.5～2 hours and pulls out;
4. copper alloy is heated to 950～1000 ℃, is incubated and carries out solution treatment after 1.5～2 hours, in medium, carry out chilling then;
5. copper alloy is carried out cold deformation, deflection 40～60%;
6. ageing treatment: for the first time copper alloy is heated to 500～520 ℃, be incubated to be put in the air after 3 hours and cool off, be heated to 450～470 ℃ with copper alloy the second time, is incubated to be put in the air after 3 hours and cools off.
In copper alloy of the present invention the weight percent of each element when manufacturing process be with the patent difference of relevant electrode in the past: 1, contain B0.08～0.3%, and B adds with the master alloy that contains B2%.2, alloy being carried out secondary ageing handles.
The effect of B in the present invention is to improve recrystallization temperature, improves the intensity of copper alloy, improves the oxidation-resistance of copper alloy simultaneously.Chromium, zinc mainly are to separate out the intensity that improves copper alloy mutually with second.Chromium and zirconium are when improving copper alloy intensity, and be less to the electroconductibility influence.The effect of magnesium is that deoxidation, degasification and second are separated out mutually.The effect of niobium and rare earth is the development of the degassing, cleaning molten steel, crystal grain thinning, inhibition column crystal, thereby has improved the intensity of copper alloy, has improved cast and forgeability.Copper alloy is heated to 850～900 ℃, is incubated to forge after 1.5～2 hours and pulls out, eliminate or alleviated casting flaw.Copper alloy is heated to 950～1000 ℃, is incubated 1.5～2 hours and carries out solution treatment, chilling in salt solution can be avoided the decomposition of sosoloid so then, closes sosoloid to obtain the ideal satiety.Copper alloy after the solution treatment carried out 40～60% cold deformation, purpose is to increase satiety and closes the lattice defect of sosoloid (as improving dislocation desity etc.), form more non-spontaneous nucleation and become the precipitation core, the decomposition rate of sosoloid makes the ageing strengthening effect more remarkable during with the quickening ageing treatment.The aging temp of copper alloy of the present invention is 480～500 ℃, is incubated the air cooling of coming out of the stove after 4 hours.For precipitated phase is fully separated out, carry out secondary ageing and handle.Along with the rising of invalid temperature and the prolongation of time, the alloy cpd of solid solution in matrix separated out, these precipitations extremely are distributed in the matrix to disperse mutually in large quantities, making matrix produce a large amount of lattice distortion (forming strain field around the precipitated phase) makes dislocation line be difficult to cut or walk around, greatly hindered moving of dislocation line, thereby the over-all properties of material has been significantly improved (precipitation strength).Because the fusing point of precipitated phase is very high, interatomic bond power is very strong, has improved the self-diffuse activation energy of atom greatly, slows down alloy atom velocity of diffusion at high temperature, has therefore improved the high-temperature behavior of alloy.
Have following performance according to the copper alloy that proportioning and manufacturing process of the present invention obtained: electric conductivity is greater than 75%IACS, and yield strength is greater than 539MPa, and antioxidant property is better, and the hot mastication temperature is above 500 ℃.
Embodiment
1, alloy ingredient and shared weight percent are: Cr 0.25%, and B 0.09%, and Mg 0.41%, and Zn 0.75%, and Nb 0.053%, and Re 0.11%, and all the other are copper and unavoidable impurities.
2, alloy ingredient and shared weight percent: Cr 0.37%, B 0.28%, and Mg 0.22%, Zn1.1%, Nb 0.037%, and Re 0.094%, and all the other are copper and unavoidable impurities.
The copper alloy of above-mentioned two kinds of different proportionings is heated to 870 ℃, is incubated to forge after 2 hours and pulls out; Solution treatment: copper alloy is heated to 970 ℃, is incubated 2 hours, in salt solution, carry out chilling subsequently; Then copper alloy is carried out 40～60% cold deformation; Last ageing treatment: for the first time copper alloy is heated to 500～520 ℃, is incubated to be put in the air after 3 hours and cools off; For the second time copper alloy is heated to 450～470 ℃, is incubated to be put in the air after 3 hours and cools off.
After above-mentioned art breading, the copper alloy performance of composition proportion: electric conductivity 75%IACS among the embodiment 1, yield strength 579MPa, 510 ℃ of softening temperatures; The copper alloy performance of composition proportion: electric conductivity 77%IACS among the embodiment 2, yield strength 558MPa, 510 ℃ of softening temperatures, and the good in oxidation resistance of copper alloy.
Except can be used for electrode welder, also can be used for other any needs in high conductivity, the high-intensity equipment according to copper alloy provided by the invention.
Claims (5)
1, a kind of high strength, high conductive copper alloy that is used for electrode welder, the weight percent that it is characterized in that the contained element of this copper alloy is: Cr 0.1～0.4%, B 0.08～0.30%, Mg 0.08～0.65%, Zn 0.3-1.2%, and Nb 0.02～0.08%, Re 0.05～0.15%, and all the other are copper and unavoidable impurities.
2, according to described high strength, the high conductive copper alloy that is used for electrode welder of claim 1, it is characterized in that the weight percent of contained each element is: Cr 0.25%, and B 0.09%, Mg 0.41%, and Zn 0.75%, and Nb 0.053%, Re 0.11%, and all the other are copper and unavoidable impurities.
3, high strength, the high conductive copper alloy that is used for electrode welder according to claim 1, the weight percent that it is characterized in that contained each element is: Cr 0.37%, B 0.28%, Mg0.22%, Zn 1.1%, Nb 0.037%, and Re 0.094%, and all the other are copper and unavoidable impurities.
4, high strength, the high conductive copper alloy that is used for electrode welder according to claim 1 is characterized in that containing B0.08～0.3%, and B adds with the master alloy that contains B2%.
5, a kind of high strength of electrode welder, manufacture method of high conductive copper alloy of being used for is characterized in that mainly may further comprise the steps:
1. casting is by the copper alloy of invention prescription;
2. copper alloy is heated to 850～900 ℃, is incubated to forge after 1.5～2 hours and pulls out;
3. solution treatment: copper alloy is heated to 950～1000 ℃, is incubated 1.5～2 hours, in medium, carry out chilling then;
4. copper alloy is carried out cold deformation, deflection 40～60%;
5. ageing treatment: for the first time copper alloy is heated to 500～520 ℃, is incubated to be put in the air after 3 hours and cools off; For the second time copper alloy is heated to 450～470 ℃, is incubated to be put in the air after 3 hours and cools off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011333995A CN1159466C (en) | 2001-11-02 | 2001-11-02 | High-strength copper alloy with high electric conductivity for electrode welder |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011333995A CN1159466C (en) | 2001-11-02 | 2001-11-02 | High-strength copper alloy with high electric conductivity for electrode welder |
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| Publication Number | Publication Date |
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| CN1353203A true CN1353203A (en) | 2002-06-12 |
| CN1159466C CN1159466C (en) | 2004-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB011333995A Expired - Fee Related CN1159466C (en) | 2001-11-02 | 2001-11-02 | High-strength copper alloy with high electric conductivity for electrode welder |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690381A (en) * | 2015-02-10 | 2015-06-10 | 宁波博威麦特莱科技有限公司 | Cutting wire for one-way wire traveling of low magnesia and manufacturing method thereof |
| CN106041106A (en) * | 2016-07-21 | 2016-10-26 | 安徽旭晶粉体新材料科技有限公司 | Boron-containing copper alloy powder prepared with secondary water-mist method |
| CN108296703A (en) * | 2017-12-11 | 2018-07-20 | 安徽宝辰机电设备科技有限公司 | A kind of electrode machining treatment process of projection welder |
| CN114507793A (en) * | 2022-01-24 | 2022-05-17 | 中南大学 | High-strength high-conductivity Cu-Zn-Cr-Zr copper alloy, and preparation method and application thereof |
-
2001
- 2001-11-02 CN CNB011333995A patent/CN1159466C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104690381A (en) * | 2015-02-10 | 2015-06-10 | 宁波博威麦特莱科技有限公司 | Cutting wire for one-way wire traveling of low magnesia and manufacturing method thereof |
| CN106041106A (en) * | 2016-07-21 | 2016-10-26 | 安徽旭晶粉体新材料科技有限公司 | Boron-containing copper alloy powder prepared with secondary water-mist method |
| CN108296703A (en) * | 2017-12-11 | 2018-07-20 | 安徽宝辰机电设备科技有限公司 | A kind of electrode machining treatment process of projection welder |
| CN114507793A (en) * | 2022-01-24 | 2022-05-17 | 中南大学 | High-strength high-conductivity Cu-Zn-Cr-Zr copper alloy, and preparation method and application thereof |
| CN114507793B (en) * | 2022-01-24 | 2022-12-09 | 中南大学 | High-strength high-conductivity Cu-Zn-Cr-Zr copper alloy, and preparation method and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1159466C (en) | 2004-07-28 |
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