CN102069316A - Brazing filler metal for brazing Al-Mg-Zn magnesium alloy - Google Patents
Brazing filler metal for brazing Al-Mg-Zn magnesium alloy Download PDFInfo
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- CN102069316A CN102069316A CN2011100008300A CN201110000830A CN102069316A CN 102069316 A CN102069316 A CN 102069316A CN 2011100008300 A CN2011100008300 A CN 2011100008300A CN 201110000830 A CN201110000830 A CN 201110000830A CN 102069316 A CN102069316 A CN 102069316A
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Abstract
The invention relates to brazing filler metal for brazing an Al-Mg-Zn magnesium alloy, which is characterized in that the brazing filler metal comprises the following raw materials in percentage by weight: 10-12% of Zn, 25-28% of Mg and balance of Al. The melting temperature range of the brazing filler metal for brazing the Al-Mg-Zn magnesium alloy provided by the invention is 439-468 DEG C, the brazing temperature range is 500-510 DEG C; and under the brazing temperature, the brazing filler metal has good spreadability and gap filling property and can be suitable for brazing the magnesium alloy the solidus temperature of which is above 510 DEG C. Especially, when the brazing is carried out on an AZ31B magnesium alloy joint by adopting a high-frequency induction brazing process, only the joint part is heated and the residual part of a substrate is less heated, thereby effectively avoiding the matrix material of an AZ31B magnesium alloy from being oxidized and overburned, the shear strength of brazing an overlap joint is 23-28MPa, and the tensile strength of brazing a butt joint is 39-44MPa.
Description
Technical field
The present invention relates to magnesium alloy and be welded to connect technical field, relate to a kind of Al-Mg-Zn magnesium alloy brazing solder specifically.
Background technology
Magnesium and magnesium alloy thereof are described as the green engineering material of 21st century, be the lightest a kind of in the metal current structural material, advantage such as it has, and density is low, specific strength is high, vibration damping is good, electromagnetic wave shielding is good, electrical and thermal conductivity is good, processability is good, hot-forming property is good, easy recovery and enjoy favor.Have extremely important using value and wide application prospect at automobile, electronics, electrical equipment, traffic, space flight, aviation and national defense and military industrial circle.But, the commercial at present magnesium alloy solder kind of using seldom, the trade mark AZ92A of BMg-1(U.S. test material association as the U.S.), BMg-2a (trade mark AZ125A of U.S. test material association) solder brazing temperature range is respectively 604～616 ℃ and 582～610 ℃, this brazing temperature is too high, and the brazing flux melting temperature that is equipped with also higher (more than 538 ℃), [Committee on brazing and soldering. Brazing Manual[M] .Third edition revised, 1975,161-168.].The composition of the MC3 standard magnesium alloy solder of Japan is in close proximity to the BMg-1 of the U.S., and this solder brazing temperature range is 605～615 ℃, and this brazing temperature is high too.Therefore, three kinds of above-mentioned magnesium alloy solders only are applicable to several magnesium alloys such as soldering AZ10A, K1A, M1A, and be not suitable for the soldering extensive use as magnesium alloys such as Mg-Al-Zn system, Mg-Zn-Zr system, Mg-Mn systems.A kind of magnesium alloy solder In-Mg-Zn-Al(solder fusion temperature scope of the new research and development of Japan is at 449～490 ℃) in contain a large amount of precious metal In(indiums), wherein the mass percent of In has accounted for about 65%, make the solder cost obviously improve [T. Watanabe, S. Komatsu, K.Oohara. Development of flux and filler metal for brazing magnesium alloy AZ31B[J] .Welding Journal, 2005,84 (3): 37-40.].The magnesium alloy solder Mg-Sn-In-Al(solder fusion temperature scope of the new research and development of Japan is at 457～500 ℃ in addition) in the In mass percent accounted for about 20%, the solder cost is also higher.[T.?Watanabe，K.?Oohara.?Brazing?of?AZ31B?magnesium?alloy?sheet[c].Conference?on?processing?and?manufacturing?of?advanced?materials,?Thermec?2006,?2007,?1603-1608.]。
Therefore, developing suitable, cheap, the easy acquisition of a kind of brazing temperature, processing performance is good, the joint combination property is good solder just becomes magnesium alloy structural part and connects and be badly in need of the technical problem that solves in making.
On the other hand, because the light-weighted demand of product, to carry out the demand of soldering more and more urgent to using some magnesium alloys widely.Therefore research and develop the required low melting point solder of these magnesium alloy brazings, and it is put into practice become one of magnesium alloy structural part manufacture process Zhong Han key technology to be solved.
Summary of the invention
Purpose of the present invention provides a kind of Al-Mg-Zn magnesium alloy brazing solder with low brazing temperature just at existing weak point in the above-mentioned prior art.
Purpose of the present invention can realize by following technique measures:
Al-Mg-Zn magnesium alloy brazing solder of the present invention comprises the raw material of following mass percent, wherein: Zn:10～12 ﹪, Mg:25～28 ﹪, surplus is Al.
Because Al, Mg among the present invention, the composition of three kinds of materials of Zn are near ternary eutectic point, so the fusion temperature of solder is lower.
Al-Mg-Zn magnesium alloy brazing solder provided by the present invention can adopt the flux protection method in the known technology to carry out melting; this flux protection method is to utilize low-melting compound to be fused into liquid state under lower temperature; spread out at the magnesium alloy liquid level, thereby play a protective role because of stoping liquid magnesium alloy to contact with air.Solder can use with forms such as block, bar-shaped, granular, sheets.Wherein: block, granular solder can adopt mechanical means to obtain after the melting; Bar-shaped, sheet solder can adopt casting method to obtain.
Technologies such as Al-Mg-Zn magnesium alloy brazing solder provided by the present invention can brazing in controlled atmosphere, induction brazing, furnace brazing, gas brazing, dip brazing, ultrasonic brazing are used for the soldering of solidus temperature at magnesium alloy more than 510 ℃ and member thereof.
The present invention has following beneficial effect:
The fusion temperature scope of Al-Mg-Zn magnesium alloy brazing solder provided by the present invention is 439～468 ℃, and brazing temperature range is 500～510 ℃; Under this brazing temperature, solder has good spreadability and gap fillibility, applicable to the soldering of solidus temperature at the magnesium alloy more than 510 ℃.When especially adopting high-frequency induction brazing technology soldering AZ31B magnesium alloy joint, butt joint is partly heated, the mother metal remainder is heated less, can avoid the oxidation and the burning of AZ31B magnesium alloy substrate material effectively, soldering lap joint shearing strength is between 23～28MPa, and soldering banjo fixing butt jointing tensile strength is between 39～44MPa.
The specific embodiment
The present invention is described further below with reference to embodiment:
Embodiment 1:
A, get by the chemical composition and the mass percent thereof of solder: Zn:11.6 ﹪, Mg:27.7 ﹪, surplus is Al;
B, employing flux protection method are carried out the brazing filler metal alloy melting, pour into ingot casting, adopt machinery to cut apart then solder is divided into rectangular bulk.
When adopting solder of the present invention that the AZ31B magnesium alloy is carried out soldering; before soldering, the AZ31B magnesium alloy sample is cleaned the removal surface contaminants through sand papering, acetone; solder places the joint; and, put into argon protective device after joint is fixed by anchor clamps and carry out high-frequency induction brazing at the even spreading brazing flux of joint and solder position.Argon flow amount is 0.3L/min in the brazing process, and programming rate is 200 ℃/min, and brazing temperature range is 490～510 ℃, behind the insulation 100s, is cooled to room temperature.After the soldering, the joint appearance forming is good, measures soldered fitting shearing strength and tensile strength, and the result is as shown in table 1.
Embodiment 2
A, get by the chemical composition and the mass percent thereof of solder: Zn:10.2 ﹪, Mg:26.8 ﹪, surplus is Al;
B, employing flux protection method are carried out the brazing filler metal alloy melting, pour into ingot casting, adopt machinery to cut apart then solder is divided into rectangular bulk.
When adopting solder of the present invention that the AZ31B magnesium alloy is carried out soldering; before soldering, the AZ31B magnesium alloy sample is cleaned the removal surface contaminants through sand papering, acetone; solder places the joint; and, put into argon protective device after joint is fixed by anchor clamps and carry out high-frequency induction brazing at the even spreading brazing flux of joint and solder position.Argon flow amount is 0.3L/min in the brazing process, and programming rate is 200 ℃/min, and brazing temperature range is 490～510 ℃, behind the insulation 100s, is cooled to room temperature.After the soldering, the joint appearance forming is good, measures soldered fitting shearing strength and tensile strength, and the result is as shown in table 1.
Embodiment 3
A, get by the chemical composition and the mass percent thereof of solder: Zn:11.1 ﹪, Mg:25.1 ﹪, surplus is Al;
B, employing flux protection method are carried out the brazing filler metal alloy melting, pour into ingot casting, adopt machinery to cut apart then solder is divided into rectangular bulk;
When adopting solder of the present invention that the AZ31B magnesium alloy is carried out soldering; before soldering, the AZ31B magnesium alloy sample is cleaned the removal surface contaminants through sand papering, acetone; solder places the joint; and, put into argon protective device after joint is fixed by anchor clamps and carry out high-frequency induction brazing at the even spreading brazing flux of joint and solder position.Argon flow amount is 0.3L/min in the brazing process, and programming rate is 300 ℃/min, and brazing temperature range is 490～510 ℃, behind the insulation 100s, is cooled to room temperature.After the soldering, the joint appearance forming is good, measures soldered fitting shearing strength and tensile strength, and the result is as shown in table 1.
1, the chemical composition of the solder for preparing among the embodiment 1-3 and soldered fitting mechanical property.
Claims (1)
1. Al-Mg-Zn magnesium alloy brazing solder, it is characterized in that: solder comprises the raw material of following mass percent, wherein: Zn:10～12 ﹪, Mg:25～28 ﹪, surplus is Al.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110000830 CN102069316B (en) | 2011-01-05 | 2011-01-05 | Brazing filler metal for brazing Al-Mg-Zn magnesium alloy |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110000830 CN102069316B (en) | 2011-01-05 | 2011-01-05 | Brazing filler metal for brazing Al-Mg-Zn magnesium alloy |
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| CN102069316A true CN102069316A (en) | 2011-05-25 |
| CN102069316B CN102069316B (en) | 2013-02-20 |
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| CN 201110000830 Expired - Fee Related CN102069316B (en) | 2011-01-05 | 2011-01-05 | Brazing filler metal for brazing Al-Mg-Zn magnesium alloy |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286483A (en) * | 2013-07-05 | 2013-09-11 | 王满玉 | Argon tungsten-arc welding method for magnesium alloys |
| CN106181113A (en) * | 2016-08-16 | 2016-12-07 | 镇江市锶达合金材料有限公司 | A kind of soldering composite aluminium alloy solder silk and preparation method thereof |
| CN106984915A (en) * | 2017-04-27 | 2017-07-28 | 河南科技大学 | A kind of magnesium alloy brazing solder containing Sn and preparation method thereof, application |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623800A (en) * | 2009-08-17 | 2010-01-13 | 南京信息工程大学 | Magnesium-based brazing filler metal alloy and preparation method thereof |
| CN101653879A (en) * | 2009-09-11 | 2010-02-24 | 北京工业大学 | Zn-Mg-Al magnesium alloy solder |
-
2011
- 2011-01-05 CN CN 201110000830 patent/CN102069316B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101623800A (en) * | 2009-08-17 | 2010-01-13 | 南京信息工程大学 | Magnesium-based brazing filler metal alloy and preparation method thereof |
| CN101653879A (en) * | 2009-09-11 | 2010-02-24 | 北京工业大学 | Zn-Mg-Al magnesium alloy solder |
Non-Patent Citations (1)
| Title |
|---|
| 马力等: "镁合金AZ31B钎焊接头的钎缝物相及力学性能", 《材料工程》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103286483A (en) * | 2013-07-05 | 2013-09-11 | 王满玉 | Argon tungsten-arc welding method for magnesium alloys |
| CN103286483B (en) * | 2013-07-05 | 2015-10-28 | 江阴戴勒姆动力设备有限公司 | A kind of tungsten level argon arc welding welding method of magnesium alloy |
| CN106181113A (en) * | 2016-08-16 | 2016-12-07 | 镇江市锶达合金材料有限公司 | A kind of soldering composite aluminium alloy solder silk and preparation method thereof |
| CN106984915A (en) * | 2017-04-27 | 2017-07-28 | 河南科技大学 | A kind of magnesium alloy brazing solder containing Sn and preparation method thereof, application |
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| Publication number | Publication date |
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| CN102069316B (en) | 2013-02-20 |
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