CN102974925A - Method for optimizing aluminum/steel metal inert-gas (MIG) soldered joint through tungsten inert gas (TIG) voltaic arc cooperating with heating - Google Patents
Method for optimizing aluminum/steel metal inert-gas (MIG) soldered joint through tungsten inert gas (TIG) voltaic arc cooperating with heating Download PDFInfo
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Abstract
The invention provides a method for optimizing an aluminum/steel metal inert-gas (MIG) soldered joint through a tungsten inert gas (TIG) voltaic arc cooperating with heating. The method comprises the following steps: (1) laboratory equipment is prepared; (2) a TIG welding gun is mounted beside a MIG main welding gun and mutually parallel to the MIG main welding gun; (3) acetone is adopted to wipe greasy dirt impurities off in an aluminium plate, a steel plate beveled edge and the surrounding; (4) the TIG voltaic arc is confirmed to be located beside a steel side for assisting, namely, the TIG voltaic arc heats the steel additionally in the welding process; (5) official welding is carried out; (6) and after the welding is finished, the MIG main welding gun is firstly closed, and then the TIG welding gun is closed. The method for optimizing the aluminum/steel metal inert-gas (MIG) soldered joint through the tungsten inert gas (TIG) voltaic arc cooperating with heating has the advantages that conception is ingenious, heat balance when a single voltaic arc is welded can be changed, the temperature of solid-state steel substrates can be improved, changes of form of interface compounds is promoted, an interface intermetallic compound layer is changed from the fact that the interface intermetallic compound layer singly grows to welded joints so as to form a layer shape to the fact that the interface intermetallic compound layer grows to the steel side with a high melting point in a sawtooth shape, pinning effects are enhanced, and the mechanical property of a connector can be obviously improved.
Description
Technical field
The present invention relates to welding technology field, relate in particular to a kind of by the collaborative heating optimization of TIG electric arc aluminium/steel MIG soldered fitting method.
Background technology
The aluminum/steel dissimilar metal structure can effectively be brought into play the advantage of bi-material, have the characteristics such as light specific gravity, intensity height, excellent corrosion resistance, have more and more widely application in departments such as Aero-Space, communications and transportation, so the welding between the aluminum steel is the study hotspot of welding field always.Simultaneously because aluminium alloy and stainless steel bi-material exist greatest differences at aspects such as thermophysical property and mechanical properties, in course of reaction, very easily generate the intermetallic compound of fragility, reduce the mechanical property of joint., also be the difficulties of welding field therefore.
In order to realize the reliable connection of aluminium/steel, many scholars have carried out large quantity research.Adopt some Pressure Welding and method for welding can realize both connections, but these method General Requirements workpiece have certain shape, and process conditions are strict, production efficiency is low, and this has all limited its application in actual production.In recent years, the welding-braze method of attachment becomes the study hotspot that connects between the larger dissimilar metal of fusing point difference, the method is owing to can accurately control the sweating heat input, and the intermetallic compound that guarantees to form between the two can be realized the reliable connection of aluminium/steel a suitable level.Be confined in the existing technology heat at aluminium sheet and steel plate contact site, the poised state of Temperature Field in Welding does not change, cause thus compound layer between weld seam and high-melting-point solid matrix, large tracts of land to generate and to present homogeneous layered, only have and the thickness of this lamellar compound reduced or its distributional pattern improved to realize reliable the connection, in order to improve the mechanical property of joint, change the growthform of compound layer, proposed a kind of method of optimizing aluminium/steel MIG soldered fitting by the collaborative heating of TIG electric arc.
Summary of the invention
The object of the invention is the defective for prior art, provide a kind of for the deficiencies in the prior art and optimized aluminium/steel MIG soldered fitting method by the collaborative heating of TIG electric arc, the method adds steel side TIG electric arc by employing and changes the welding equilibrium temperature field, and then promote intermetallic compound to grow to steel side " zigzag ", thereby increase interface compound to the pinning effect of high-melting-point steel matrix, improve the mechanical property of joint
The present invention is achieved by the following technical solutions, developed a kind of working in coordination with by TIG electric arc and heated optimization aluminium/steel MIG soldered fitting method, it is characterized in that: comprise following steps:
(1), MIG welding gun side steel matrix upper surface position is arranged the TIG welding gun, MIG welding gun and TIG welding gun are parallel to each other, and TIG electric arc is apart from MIG electric arc 20-40mm;
(2), uniform thickness aluminium sheet and steel plate connector are offered V-butt, the bevel angle of steel mother metal side is 40 °, and the bevel angle of aluminum mother plate side is 30 °;
(3), aluminium sheet and divided edge of steel plate and around take with acetone wiping wipe oil impurity, adopt liquid-containing binder and potassium aluminum fluoride flux to be mixed into paste at 1: 1, with the groove face of compound brushing at steel plate, dry up to be welded with the wood brush with hair-dryer;
(4), definite auxiliary TIG electric arc is positioned at the steel side, and apart from the main MIG electric arc 20-40mm of welding, TIG electric arc is additionally heated to steel;
(5), when formally welding, after starting the work of MIG master's welding gun, start the work of TIG welding gun, two electric arcs are in that parallel position is collaborative to travel forward, and normally weld;
(6), after welding is finished, close first MIG master's welding gun, after close the TIG welding gun.
Described according to MIG welding gun side steel matrix ad-hoc location device TIG welding gun in the step (1), auxiliary TIG electric arc changes the thermal field poised state of MIG soldering, steel side metal linkage interface temperature improves 50-120 ℃, and the hot strength of joint improves 20%-40%.
Beneficial effect of the present invention: novel, thermal balance in the time of can changing single arc welding, improve the temperature of solid steel matrix, impel the form of interface compound to change, solely forming stratiform to weld seam growth by the original interface intermetallic compounds layer, to change between interface metal compound layer into long to the higher unfused steel adnation of fusing point with zigzag, increased pinning effect, obviously improves the mechanical property of joint, greatly improve operating efficiency, reduced the ideal effect of cost.
Description of drawings
Fig. 1 is structural representation of the present invention;
The specific embodiment
A kind of by the collaborative heating optimization of TIG electric arc aluminium/steel MIG soldered fitting method, it is characterized in that: method step is as follows:
(1), MIG welding gun side steel matrix upper surface position is arranged the TIG welding gun, MIG welding gun and TIG welding gun are parallel to each other, and TIG electric arc is apart from MIG electric arc 20-40mm;
(2), uniform thickness aluminium sheet and steel plate connector are offered V-butt, the bevel angle of steel mother metal side is 40 °, and the bevel angle of aluminum mother plate side is 30 °;
(3), aluminium sheet and divided edge of steel plate and around take with acetone wiping wipe oil impurity, adopt liquid-containing binder and potassium aluminum fluoride flux to be mixed into paste at 1: 1, with the groove face of compound brushing at steel plate, dry up to be welded with the wood brush with hair-dryer;
(4), definite auxiliary TIG electric arc is positioned at the steel side, and apart from the main MIG electric arc 20-40mm of welding, TIG electric arc is additionally heated to steel;
(5), when formally welding, after starting the work of MIG master's welding gun, start the work of TIG welding gun, two electric arcs are in that parallel position is collaborative to travel forward, and normally weld;
(6), after welding is finished, close first MIG master's welding gun, after close the TIG welding gun.
Described according to MIG welding gun side steel matrix ad-hoc location device TIG welding gun in the step (1), auxiliary TIG electric arc changes the thermal field poised state of MIG soldering, steel side metal linkage interface temperature improves 50-120 ℃, and the hot strength of joint improves 20%-40%.
Welding parameter is seen following form in the described step (5):
Welding condition
Those of ordinary skill in the art can understand, and in protection scope of the present invention, it all is possible making amendment or replace for above-mentioned design principle and technical parameter, and it does not all exceed protection scope of the present invention.
Claims (2)
1. one kind is passed through the collaborative heating optimization of TIG electric arc aluminium/steel MIG soldered fitting method, it is characterized in that: comprise following steps:
(1), MIG welding gun side steel matrix upper surface position is arranged the TIG welding gun, MIG welding gun and TIG welding gun are parallel to each other, and the TIG welding gun is apart from MIG welding gun 20-40mm;
(2), uniform thickness aluminium sheet and steel plate connector are offered V-butt, the bevel angle of steel mother metal side is 40 °, and the bevel angle of aluminum mother plate side is 30 °;
(3), aluminium sheet and divided edge of steel plate and around take with acetone wiping wipe oil impurity, adopt liquid-containing binder and potassium aluminum fluoride flux to be mixed into paste at 1: 1, with the groove face of compound brushing at steel plate, dry up to be welded with the wood brush with hair-dryer;
(4), definite auxiliary TIG electric arc is positioned at the steel side, and apart from the main MIG electric arc 20-40mm of welding, TIG electric arc is additionally heated to steel;
(5), when formally welding, after starting the work of MIG master's welding gun, start the work of TIG welding gun, two electric arcs are in that parallel position is collaborative to travel forward, and normally weld;
(6), after welding is finished, close first MIG master's welding gun, after close the TIG welding gun.
2. according to claim 1 a kind of by the collaborative heating optimization of TIG electric arc aluminium/steel MIG soldered fitting method, it is characterized in that: described according to MIG welding gun side steel matrix ad-hoc location device TIG welding gun in the step (1), auxiliary TIG electric arc changes the thermal field poised state of MIG soldering, steel matrix metal joint face temperature improves 50-120 ℃, and the hot strength that adopts the method to obtain joint does not improve 20%-40% than adding the joint tensile strength that obtains under the auxiliary TIG electric arc preheating condition.
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Cited By (6)
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| CN103231160A (en) * | 2013-04-07 | 2013-08-07 | 山东大学 | Fusion welding process for iron and aluminum-base alloy and stainless steel by taking Fe-Cr-Ni alloy as filling material |
| CN104014934A (en) * | 2014-06-19 | 2014-09-03 | 兰州理工大学 | Electric-arc-assisted laser welding-brazing method applicable to dissimilar material butt connection |
| CN105592968A (en) * | 2013-08-06 | 2016-05-18 | 马格纳斯泰尔汽车技术两合公司 | Method for producing welded joint |
| CN106457439A (en) * | 2014-04-02 | 2017-02-22 | 马提亚·安格豪森 | Method for producing a bonded joint, and structural element |
| CN111054989A (en) * | 2019-12-31 | 2020-04-24 | 河北建筑工程学院 | Copper-aluminum TIG pressure brazing equipment and process |
| CN115178846A (en) * | 2022-07-27 | 2022-10-14 | 中车青岛四方机车车辆股份有限公司 | Welding method and welding auxiliary device |
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| CN101264541A (en) * | 2008-05-09 | 2008-09-17 | 哈尔滨工业大学 | Additional electric arc heating copper backing board pre-heating aluminum alloy and magnesium alloy welding method |
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| CN102528243A (en) * | 2011-12-15 | 2012-07-04 | 哈尔滨工业大学 | Arc welding-brazing method for titanium-aluminum dissimilar alloy TIG (tungsten inert gas) arc preheating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103231160A (en) * | 2013-04-07 | 2013-08-07 | 山东大学 | Fusion welding process for iron and aluminum-base alloy and stainless steel by taking Fe-Cr-Ni alloy as filling material |
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| CN111054989A (en) * | 2019-12-31 | 2020-04-24 | 河北建筑工程学院 | Copper-aluminum TIG pressure brazing equipment and process |
| CN115178846A (en) * | 2022-07-27 | 2022-10-14 | 中车青岛四方机车车辆股份有限公司 | Welding method and welding auxiliary device |
| CN115178846B (en) * | 2022-07-27 | 2023-10-24 | 中车青岛四方机车车辆股份有限公司 | Welding method and welding auxiliary device |
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