CN1709633A - Composite welding wire for welding red copper thick plate without preheating and its welding method - Google Patents
Composite welding wire for welding red copper thick plate without preheating and its welding method Download PDFInfo
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- CN1709633A CN1709633A CN 200510010163 CN200510010163A CN1709633A CN 1709633 A CN1709633 A CN 1709633A CN 200510010163 CN200510010163 CN 200510010163 CN 200510010163 A CN200510010163 A CN 200510010163A CN 1709633 A CN1709633 A CN 1709633A
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Abstract
A compound solder and its jointing method relates to the solder of soldering thick copper board and its jointing method. The compound solder which is used in the purple thick copper board that doesn't need to heat up in advance is made up of copper which occupies 66~99% and titanium which occupies 1~34% by the quality percent. The compound of solder shapes by the method that one enwraps the other one in the upward two kinds of materials. The process of the method is that firstly it is to oppositely connect the purple thick copper3 board which will be soldered. Secondly, it adopts the mixed gas of argon and azote to protect. Thirdly, it is to fill in the compound solder in the opposite connection of the purple thick copper board. Finally, the welding torch adopts the way of moving while welding. The method doesn't need to heat up in advance when welding the purple thick copper board and eliminates air holes and cracks of the welding line. The invention is provided with the easy operation, economized on energy, the high efficiency and the low cost.
Description
Technical field:
The present invention relates to weld the scolder and the welding method thereof of thick copper coin.
Background technology:
The purposes of copper and copper alloy is only second to iron and steel and aluminium.Because red copper thermal conductivity factor height is 391W/mK, is 1.5 times of aluminium, heat distributes from the weld zone rapidly in the welding process.When particularly red copper thick plate being welded, not only the molten bath forms difficulty, and is prone to fire check in the process of weld seam crystallisation by cooling.When being welded, thick-wall red copper spare has following point: 1, preheat temperature height (600～700 ℃) and welding process should be carried out continuously, heat time heating time is long, the thermal capacity of input is big, and welding heat affected zone is big, tissue and performance variation condition of work big, the workman are very arduous; 2, the protection effect of gas welding is bad.Airborne reducing atmosphere is invaded weld seam, and oxide is reduced in the copper, forms 1066 ℃ low-melting-point eutectic (Cu+Cu
2O) be distributed in crystal boundary, can cause the generation of fire check; 3, appearance of weld poor, yielding, be prone to defectives such as pore, incomplete fusion, crackle.Manual arc is welded in following problem in the process of red copper welding: 1, welding procedure complexity: weld preheating (500～600 ℃) temperature height, and to guarantee carrying out continuously of welding process.The welding region high-temperature residence time is long like this, and input thermal capacity is big, and workman's working environment is very arduous, and simultaneously big, tissue of heat affected area scope and Weld Performance change greatly; 2, the alloying element evaporation is serious, and weld seam is hydrogeneous, oxygen amount height, and the zinc evaporation is serious, occurs defectives such as pore, crackle easily; 3, welding quality instability, appearance of weld is poor, and weld strength is low.MIG needs 600～700 ℃ of preheatings when being welded in the welding thick-wall red copper, and is very sensitive to oxygen element, and when the copper of welding deoxidation deficiency, the crackle and the pore of weld seam are more, and intensity is lower.The strength of joint of TIG soldering is low, weld hardness is high, plasticity, poor toughness.TIG melting welding: one, there is following point in argon shield in the welding to red copper thick plate: 1, preheat temperature height need be preheated to 600-700 ℃ usually and just can reach welding effect preferably; 2, the welding of slab generally all must be adopted multi-pass welding, and welding process should be carried out continuously, causes heat time heating time long, and the thermal capacity of input is big, and welding heat affected zone is bigger, simultaneously mother metal tissue and performance is also had certain influence; 3, appearance of weld is poor, is prone to fire check, and the weldment surface oxidation is serious, and the welding point distortion is bigger; 4, because welding engineering must at high temperature continue to carry out, make that workman's working environment is very abominable, production efficiency is low; Two, helium protection: the arc power during the helium protection is higher, is preheated to 300 ℃ during to thick plates and just can reaches welding effect preferably.But because 1800 yuan/bottle of helium prices are about 24 times of argon gas, so welding cost height when using the helium protection; Three, nitrogen protection: because do not form solid solution and compound between nitrogen and the copper, so theoretically, nitrogen protection can be used for welding red copper.During nitrogen protection, the power of electric arc is very high, when not preheating, and just can welding red copper.But from present soldering test, during nitrogen protection, a large amount of pore and crackle can occur in the weld seam, make the intensity of weld seam reduce.
Summary of the invention:
The objective of the invention is needs preheating and weld seam to be prone to the problem of pore and crackle when solving welding red copper thick plate, and a kind of combined wire and welding method thereof that not needing to be used for the preheating welding red copper thick plate is provided, and the technical scheme that addresses the above problem is as follows:
The present invention not needing to be used for the combined wire of preheating welding red copper thick plate to be made up of elemental copper and titanium, and red copper accounts for 66～99% by mass percentage, titanium accounts for 1～34%, and combined wire forms by a kind of parcel in two kinds of above-mentioned materials is another kind of.
Not needing to be used for the method for preheating welding red copper thick plate, this method adopts the following step:
A, red copper thick plate 3 butt joints that will weld;
B, fill combined wire 4 in red copper thick plate 3 docking sections;
C, the protection of employing nitrogen argon mixture gas;
The welding manner that welding gun 5 adopts swing to advance when D, welding carries out.
Combined wire of the present invention and welding method thereof, when welding red copper thick plate 3, do not need preheating, the pore and the crackle of weld seam have been eliminated simultaneously, it also has simple to operate, energy-conservation, efficient, cost, and low (nitrogen is cheap, 35 yuan/bottle, be about 1/50 of helium, argon gas 1/2) characteristics, help in industrial production, promoting.
Description of drawings:
Fig. 1 is the front view of combined wire, and Fig. 2 is the A-A cut-away view of Fig. 1, and Fig. 3 is the schematic diagram of welding method of the present invention.
The specific embodiment:
The specific embodiment one: being used for of present embodiment do not need the combined wire of preheating welding red copper thick plate to be made up of elemental copper and titanium, red copper accounts for 66～99% by mass percentage, titanium accounts for 1～34%, and combined wire forms by a kind of parcel in two kinds of above-mentioned materials is another kind of.
The specific embodiment two: (as Fig. 2) of present embodiment not needing to be used for the combined wire of preheating welding red copper thick plate to be formed by red copper outer 1 and titanium core 2, and red copper accounts for 99% by mass percentage, titanium accounts for 1%.Red copper shown in Figure 2 outer 1 and titanium core 2 can transpositions.
The specific embodiment three: being used for of present embodiment do not need the combined wire of preheating welding red copper thick plate welding to be formed by red copper outer 1 and titanium core 2, and red copper accounts for 75% by mass percentage, titanium accounts for 25%.
The specific embodiment four: the combined wire that being used for of present embodiment do not need the preheating welding red copper thick plate is by the red copper inner core and titanium is outer forms, and red copper accounts for 66% by mass percentage, titanium accounts for 34%.
The specific embodiment five: present embodiment not needing to be used for the method for preheating welding red copper thick plate, red copper thick plate 3 butt joints that this method adopts the following step: A, will weld; B, fill combined wire 4 in the docking section of red copper thick plate 3; C, adopt the protection of nitrogen argon mixture gas, the volume ratio of nitrogen argon gas to be, nitrogen accounts for 25～99%, and argon gas accounts for 1～75%.Because do not form solid solution and compound between nitrogen and the copper; and during nitrogen protection; the power of electric arc is very high; so; adopt the nitrogen protection can finish welding to red copper thick plate under the situation of not preheating, adding in the nitrogen that an amount of argon gas mixes is in order to solve nitrogen electric arc problem of unstable when the high power.Combined wire of the present invention nitrogen in the process of nitrogen argon mixture gas protection is absorbed by the titanium in the combined wire, so avoided nitrogen to be prone to the problem of pore and crackle in welding; The welding manner that welding gun 5 adopts swing to advance when D, welding carries out the better (see figure 3) of the effect of welding.
Employing does not need the combined wire of preheating welding red copper thick plate and the red copper thick plate 3 of welding method welding thereof, and the performance indications after the welding are:
Joint tensile strength 〉=80%;
Percentage elongation 〉=20%;
Speed of welding 1～6mm/s.
Claims (8)
1, not needing to be used for the combined wire of preheating welding red copper thick plate, to it is characterized in that it is made up of elemental copper and titanium, red copper accounts for 66～99% by mass percentage, titanium accounts for 1～34%, and combined wire forms by a kind of parcel in two kinds of above-mentioned materials is another kind of.
2, the combined wire that not needing to be used for the preheating welding red copper thick plate according to claim 1, the skin that it is characterized in that combined wire are by red copper, and inner core is that titanium forms.
3, the combined wire that not needing to be used for the preheating welding red copper thick plate according to claim 1, the skin that it is characterized in that combined wire are by titanium, and inner core is that red copper forms.
4, the combined wire that not needing to be used for the preheating welding red copper thick plate according to claim 1 is characterized in that by mass percentage red copper accounts for 99%, titanium accounts for 1%.
5, the combined wire that not needing to be used for the preheating welding red copper thick plate according to claim 1 is characterized in that by mass percentage red copper accounts for 75%, titanium accounts for 25%.
6, the combined wire that not needing to be used for the preheating welding red copper thick plate according to claim 1 is characterized in that by mass percentage red copper accounts for 66%, titanium accounts for 34%.
7, not needing to be used for the method for preheating welding red copper thick plate, to it is characterized in that red copper thick plate (3) butt joint that this method adopts the following step: A, will weld; B, the protection of employing nitrogen argon mixture gas; C, fill combined wire (4) in the docking section of red copper thick plate (3); The welding manner that welding gun (5) adopts swing to advance when D, welding carries out.
8, the method that not needing to be used for the preheating welding red copper thick plate according to claim 7 is characterized in that the volume ratio of nitrogen argon mixture gas is, nitrogen accounts for 25～99%, argon gas accounts for 1～75%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100101639A CN100335229C (en) | 2005-07-08 | 2005-07-08 | Composite welding wire for welding red copper thick plate without preheating and its welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100101639A CN100335229C (en) | 2005-07-08 | 2005-07-08 | Composite welding wire for welding red copper thick plate without preheating and its welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1709633A true CN1709633A (en) | 2005-12-21 |
| CN100335229C CN100335229C (en) | 2007-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100101639A Expired - Fee Related CN100335229C (en) | 2005-07-08 | 2005-07-08 | Composite welding wire for welding red copper thick plate without preheating and its welding method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829860A (en) * | 2010-04-20 | 2010-09-15 | 哈尔滨工业大学 | Welding wire for unpreheated welding of red copper thick and large part and preparation method thereof |
| CN102513729A (en) * | 2012-01-04 | 2012-06-27 | 天津大学 | Aluminum deoxidizing welding wire used for carbon dioxide gas arc welding and preparation method thereof |
| CN106400003A (en) * | 2016-10-09 | 2017-02-15 | 青岛理工大学 | Titanium nitride/copper titanium intermetallic compound enhanced coating for red copper surface |
| CN110480131A (en) * | 2019-08-28 | 2019-11-22 | 上海交通大学 | The protective gas and welding method of MIG welding |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5725288A (en) * | 1980-07-23 | 1982-02-10 | Hitachi Ltd | Method for welding thick copper plate |
| CN1228167C (en) * | 2003-04-17 | 2005-11-23 | 哈尔滨工业大学 | Method for red copper transition welding without preheating metal alloy |
| CN1285440C (en) * | 2004-04-14 | 2006-11-22 | 哈尔滨工业大学 | Micro melting soldering method of argon-shielded tungsten arc welding for thick plate of red copper without warming-up |
-
2005
- 2005-07-08 CN CNB2005100101639A patent/CN100335229C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101829860A (en) * | 2010-04-20 | 2010-09-15 | 哈尔滨工业大学 | Welding wire for unpreheated welding of red copper thick and large part and preparation method thereof |
| CN102513729A (en) * | 2012-01-04 | 2012-06-27 | 天津大学 | Aluminum deoxidizing welding wire used for carbon dioxide gas arc welding and preparation method thereof |
| CN106400003A (en) * | 2016-10-09 | 2017-02-15 | 青岛理工大学 | Titanium nitride/copper titanium intermetallic compound enhanced coating for red copper surface |
| CN110480131A (en) * | 2019-08-28 | 2019-11-22 | 上海交通大学 | The protective gas and welding method of MIG welding |
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| Publication number | Publication date |
|---|---|
| CN100335229C (en) | 2007-09-05 |
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Granted publication date: 20070905 Termination date: 20110708 |