CN110181149A - A kind of magnesium alloy welding method - Google Patents
A kind of magnesium alloy welding method Download PDFInfo
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- CN110181149A CN110181149A CN201910557833.0A CN201910557833A CN110181149A CN 110181149 A CN110181149 A CN 110181149A CN 201910557833 A CN201910557833 A CN 201910557833A CN 110181149 A CN110181149 A CN 110181149A
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- welding
- magnesium alloy
- welded
- welding method
- alloy welding
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K2103/00—Materials to be soldered, welded or cut
- B23K2103/08—Non-ferrous metals or alloys
- B23K2103/15—Magnesium or alloys thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Arc Welding In General (AREA)
Abstract
The present invention provides a kind of magnesium alloy welding methods, comprising the following steps: S1: polishing the surface to be welded of welded workpiece；S2: welded workpiece is set up；S3: TIG direct current-direct current (AC-DC) welding is used; constant current welding; welding condition is; the every 8-12ms timing of welding machine output polarity changes primary; using argon gas more than 99.99% purity as arc protection gas; gas flow is 10-15L/min, welding current 110A-130A, speed of welding 35-40cm/min.The magnesium alloy welding method has the advantages that easy to operate, welding effect is good, welding quality is high, practical.
Description
Technical field
The present invention relates to a kind of welding methods, specifically, relate to a kind of magnesium alloy welding method.
Background technique
Magnesium alloy has many advantages, such as that density is small, intensity is high, elasticity modulus is big, good heat dissipation, absorb shock resistance are good, absorbs impact load
Lotus ability is bigger than aluminium alloy, and the corrosivity of resistance to organic matter and alkali is good, has good machinability, to the application value of industrial plate
It is very high.But magnesium alloy also has the characteristics that fusing point (650 DEG C) is low, thermal conductivity is high, oxidisability is extremely strong, thermal expansion coefficient is larger, weldering
When connecing thin plate, due to thermal conductivity height, welding base metal temperature is easy dramatic decrease and fire check occurs, since fusing point is low, when welding
Temperature is excessively high to be also easy to appear scaling loss, and currently on the market not to the effective method of magnesium alloy welding, this also causes such as
In automotive field, using mechanical splices modes such as bolts when magnesium alloy plate splices.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Summary of the invention
The purpose of the present invention is in view of the deficiencies of the prior art, to provide, one kind is easy to operate, welding effect is good, welding
Quality height, practical magnesium alloy welding method.
To achieve the goals above, the technical scheme adopted by the invention is that: a kind of magnesium alloy welding method, including following
Step: it S1: polishes the surface to be welded of welded workpiece；S2: welded workpiece is set up；S3: it is handed over using TIG straight
Fluid welding machine, constant current welding, welding condition are that the every 8-12ms timing of welding machine output polarity changes once, using 99.99%
Argon gas more than purity is as arc protection gas, gas flow 10-15L/min, welding current 110A-130A, welding speed
Degree is 35-40cm/min.
Based on above-mentioned, the tungsten electrode tip angle of the TIG direct current-direct current (AC-DC) welding in step S3 is 45 ° -50 °, the point of the tungsten electrode
Holding end is in arc-shaped.
Based on above-mentioned, the tungsten electrode pole body diameter is 3.2mm, and the tungsten electrode tip ends maximum gauge is 1.0mm.
Based on above-mentioned, the every 10ms timing of welding machine output polarity in step S3 changes primary.
Based on above-mentioned, using the argon gas of 99.999% purity as protection gas in step S3.
Based on above-mentioned, it further includes step S: setting up copper sheet liner to welded workpiece, cool heat dissipation is delayed when facilitating welding.
Based on above-mentioned, copper sheet liner thickness used in step S is 10mm, width 80mm.
Based on above-mentioned, face of weld is treated using stainless steel wire brush in step S1 and is polished, surface to be welded is removed
Oxide layer avoids surface to be welded from subtle dent occur.
Based on above-mentioned, in welding process, environment temperature is 10 °C or more, and ambient air humidity is below 70%.
The present invention has substantive distinguishing features outstanding and significant progress compared with the prior art, specifically, present invention tool
It has the following advantages:
(1) magnesium alloy is welded using TIG weld mode, using direct current-direct current (AC-DC) welding power supply, CONSTANT CURRENT WELDING, every 8ms-12ms
A periodically output polarity of variation reaches welding magnesium alloy by selecting suitable protection gas and flow, electric current and speed of welding
The purpose of plate ensure that weld strength and stability, and weld appearance is beautiful, and can weld in 10 °C or more of conventional environment
It connects, generalization is strong.
(2) 45 ° -50 ° are set by tungsten electrode wedge angle, end polishing is in the arc-shaped, can reduce base material scaling loss in welding process
Electric arc not concentration phenomenon, and increase weld penetration, reduce molten wide.
(3) since magnesium alloy fusing point is low, thermal conductivity is good, base material temperature dramatic decrease after welding, it may appear that fire check, welding
It is padded in the process using copper sheet, base material can be helped to delay cool and heat dissipation, avoid the appearance of fire check.
(4) joint environment temperature control is at 10 °C or more, and humid control is 70% hereinafter, temperature is too low can increase and split
The probability of line, humidity cross conference and generate stomata.
Specific embodiment
Below by specific embodiment, technical scheme of the present invention will be described in further detail.
A kind of magnesium alloy welding method, comprising the following steps:
(1) it polishes the surface to be welded of welded workpiece, face of weld is specifically treated using stainless steel wire brush and is beaten
Mill, removes the oxide layer on surface to be welded, and polishing dynamics should not be too large, and surface to be welded is avoided subtle dent, Surface Oxygen occur
Compound and impurity enter dent and will affect welding machine；
(2) welded workpiece is set up, is welded as far as possible using downhand position；
(3) copper sheet liner is set up to welded workpiece, when welding, base material can be helped to delay cool, heat dissipation, avoid base material temperature rapidly under
It drops and fire check occurs, used copper sheet liner thickness is 10mm, width 80mm；
(4) TIG direct current-direct current (AC-DC) welding, constant current welding are used, welding condition is that the every 8-12ms timing of welding machine output polarity becomes
Change primary, using argon gas more than 99.99% purity as arc protection gas, gas flow 10-15L/min, welding current is
110A-130A, speed of welding 35-40cm/min；Preferably, the every 10ms timing of welding machine output polarity changes primary, use
It is the argon gas of 99.999% purity as protection gas.
In welding process, the size of tungsten electrode tip angle will affect the electric current of tungsten electrode, striking, stabilising arc performance and welding electricity
Arc centrality, the tungsten electrode tip angle of TIG direct current-direct current (AC-DC) welding is 45 ° -50 ° in the present invention, and the tip ends of the tungsten electrode are in circle
Arcuation, the tungsten electrode pole body diameter are 3.2mm, and the tungsten electrode tip ends maximum gauge (greatest circle of i.e. arc-shaped wedge angle) is
1.0mm；So set, base material scaling loss electric arc not concentration phenomenon can be reduced in welding process, and increase weld penetration, reduces molten
It is wide.
In welding process, joint environment temperature control is at 10 °C or more, and humid control is 70% hereinafter, the too low meeting of temperature adds
Big cracked probability, humidity cross conference and generate stomata.
The present invention mainly welds two kinds of materials of magnesium alloy (AZ61-AZ31), by above-mentioned welding method, can obtain
It to the magnesium alloy weldment of higher-strength, is slightly welded inferior to 5 line aluminium alloy materials in intensity, meets actual needs, molding magnesium closes
Golden good appearance, the narrow surfacing of weld seam, performance are stablized, can be used in 10 °C or more of conventional environment, are easy to promote.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (10)
1. a kind of magnesium alloy welding method, which comprises the following steps:
S1: it polishes the surface to be welded of welded workpiece；
S2: welded workpiece is set up；
S3: using TIG direct current-direct current (AC-DC) welding, constant current welding, and welding condition is that the every 8-12ms timing of welding machine output polarity becomes
Change primary, using argon gas more than 99.99% purity as arc protection gas, gas flow 10-15L/min, welding current is
110A-130A, speed of welding 35-40cm/min.
2. magnesium alloy welding method according to claim 1, it is characterised in that: TIG direct current-direct current (AC-DC) welding in step S3
Tungsten electrode tip angle is 45 ° -50 °, and the tip ends of the tungsten electrode are in arc-shaped.
3. magnesium alloy welding method according to claim 2, it is characterised in that: the tungsten electrode pole body diameter is 3.2mm, institute
Stating tungsten electrode tip ends maximum gauge is 1.0mm.
4. magnesium alloy welding method according to claim 1, it is characterised in that: the welding machine output polarity in step S3 is every
10ms timing changes primary.
5. magnesium alloy welding method according to claim 4, it is characterised in that: pure using 99.999% in step S3
The argon gas of degree is as protection gas.
6. magnesium alloy welding method according to claim 1-5, which is characterized in that it further includes step S: being treated
Welding workpiece sets up copper sheet liner, and cool heat dissipation is delayed when facilitating welding.
7. magnesium alloy welding method according to claim 6, which is characterized in that copper sheet liner thickness used in step S
For 10mm, width 80mm.
8. according to claim 1, the described in any item magnesium alloy welding methods in 2,3,4,5 or 7, which is characterized in that in step S1
Face of weld is treated using stainless steel wire brush to polish, removes the oxide layer on surface to be welded, and surface to be welded is avoided to occur
Subtle dent.
9. magnesium alloy welding method according to claim 6, which is characterized in that treated in step S1 using stainless steel wire brush
Face of weld is polished, and the oxide layer on surface to be welded is removed, and surface to be welded is avoided subtle dent occur.
10. according to claim 1, the described in any item magnesium alloy welding methods in 2,3,4,5,7 or 9, which is characterized in that welded
Cheng Zhong, environment temperature are 10 °C or more, and ambient air humidity is below 70%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910557833.0A CN110181149A (en) | 2019-06-26 | 2019-06-26 | A kind of magnesium alloy welding method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910557833.0A CN110181149A (en) | 2019-06-26 | 2019-06-26 | A kind of magnesium alloy welding method |
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| CN110181149A true CN110181149A (en) | 2019-08-30 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862919A (en) * | 2010-06-18 | 2010-10-20 | 北京理工大学 | Thick-plate AZ31 magnesium alloy welding joint and double-sided welding method thereof |
| CN103286483A (en) * | 2013-07-05 | 2013-09-11 | 王满玉 | Argon tungsten-arc welding method for magnesium alloys |
| CN104117759A (en) * | 2014-07-04 | 2014-10-29 | 重庆大学 | Welding method of magnesium alloy sheets |
| CN105328310A (en) * | 2015-12-01 | 2016-02-17 | 山东省科学院新材料研究所 | Automatic argon arc slotting and filler wire welding method for magnesium alloy lap welding |
| JP2016036855A (en) * | 2014-08-08 | 2016-03-22 | 国立大学法人大阪大学 | Welding method for magnesium material |
-
2019
- 2019-06-26 CN CN201910557833.0A patent/CN110181149A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101862919A (en) * | 2010-06-18 | 2010-10-20 | 北京理工大学 | Thick-plate AZ31 magnesium alloy welding joint and double-sided welding method thereof |
| CN103286483A (en) * | 2013-07-05 | 2013-09-11 | 王满玉 | Argon tungsten-arc welding method for magnesium alloys |
| CN104117759A (en) * | 2014-07-04 | 2014-10-29 | 重庆大学 | Welding method of magnesium alloy sheets |
| JP2016036855A (en) * | 2014-08-08 | 2016-03-22 | 国立大学法人大阪大学 | Welding method for magnesium material |
| CN105328310A (en) * | 2015-12-01 | 2016-02-17 | 山东省科学院新材料研究所 | Automatic argon arc slotting and filler wire welding method for magnesium alloy lap welding |
Non-Patent Citations (2)
| Title |
|---|
| 中国机械工程学会焊接学会: "《焊接手册 第1卷 焊接方法及设备》", 31 January 2008 * |
| 北京航空制造工程研究所: "《航空制造技术》", 31 December 2013, 航空工业出版社 * |
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Application publication date: 20190830 |