CN101658981A - Magnesium alloy brazing solder containing rare earth - Google Patents
Magnesium alloy brazing solder containing rare earth Download PDFInfo
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- CN101658981A CN101658981A CN200910092578A CN200910092578A CN101658981A CN 101658981 A CN101658981 A CN 101658981A CN 200910092578 A CN200910092578 A CN 200910092578A CN 200910092578 A CN200910092578 A CN 200910092578A CN 101658981 A CN101658981 A CN 101658981A
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Abstract
The invention relates to a magnesium alloy brazing solder containing rare earth, belonging to the technical field of magnesium alloy welded connection. The chemical compositions and mass percent thereof of the magnesium alloy brazing solder containing rare earth are as follows: 0.5-1.5% of Nd,, 45-49% of Mg, and the balance of Zn. The melting temperature range of the magnesium alloy brazing soldercontaining rare earth is between 333 and 356 DEG C and the brazing temperature range thereof is between 400 and 430 DEG C, and the solder is applicable to the brazing of magnesium alloy with the solidus temperature higher than 430 DEG C. By using the solder to braze AZ31B magnesium alloy in the mode of high frequency induction brazing, the shearing strength of brazing overlapped joint is between38 and 39 MPa, and the tensile strength of the brazing butt joint is between 53 and 62 MPa. Compared with the AZ31B magnesium alloy joint brazed by magnesium alloy solder with the same components andwithout being added with rare earth, both the tensile strength and the shearing strength of brazing joints are improved by more than 30 percent.
Description
Technical field
The present invention relates to a kind of magnesium alloy brazing solder that contains rare earth, belong to magnesium alloy and be welded to connect technical field.
Background technology
Magnesium and magnesium alloy thereof are the lightest a kind of in the metal current structural material, have advantages such as 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, BMg-1 (trade mark AZ92A of U.S. test material association), BMg-2a (trade mark AZ125A of U.S. test material association) solder brazing temperature range as the U.S. are 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.BrazingManual[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, be not suitable for the soldering extensive use as magnesium alloys such as Mg-Al-Zn system, Mg-Zn-Zr system, Mg-Mn systems.Contain a large amount of precious metal In (indium) among a kind of magnesium alloy solder In-Mg-Zn-Al (solder fusion temperature scope is at 449～490 ℃) of the new research and development of Japan, 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 magnesiumalloy AZ31B[J] .Welding Journal, 2005,84 (3): 37-40.].The In mass percent has accounted for about 20% among the magnesium alloy solder Mg-Sn-In-Al (solder fusion temperature scope is at 457～500 ℃) of the new research and development of Japan in addition, and the solder cost is also higher.[T.Watanabe，K.Oohara.Brazing?of?AZ31B?magnesium?alloy?sheet[c].Conference?on?processingand?manufacturing?of?advanced?materials，Thermec?2006，2007，1603-1608.]。Because rare earth element has special configuration of extra-nuclear electron and physicochemical properties, in magnesium alloy, add the combination property that trace rare-earth can further improve and improve alloy.[Li Na, Liu Jianrui, Wang Shuanqiang. etc. the application of rare earth in magnesium and magnesium alloy. foundry engieering [J] 2006,27 (10): 1133-1136.].But also there is not the relevant report that contains the magnesium alloy brazing material of rare earth element at present.
Therefore, a kind of rare earth element, suitable, cheap, the easy acquisition of brazing temperature, manufacturability is good, the joint combination property is good solder of containing of development just becomes magnesium alloy structural part and connects and be badly in need of the technical problem that solves in making.
Summary of the invention
The purpose of this invention is to provide and a kind ofly have low brazing temperature and have higher-strength to contain the magnesium alloy brazing solder of rare earth.
Chemical composition and the mass percent thereof that contains the magnesium alloy brazing solder of rare earth provided by the present invention is: Nd:0.5～1.5%, and Mg:45～49%, surplus is Zn.
The magnesium alloy brazing solder that contains rare earth provided by the present invention adopts the flux protection method to carry out melting.Solder can use with forms such as block, bar-shaped, granular, sheets.Block, granular solder can adopt mechanical means to obtain after the melting; Bar-shaped, sheet solder can adopt casting method to obtain.Solder can adopt technologies such as brazing in controlled atmosphere, induction brazing, furnace brazing, gas brazing, dip brazing, ultrasonic brazing to be used for the soldering of solidus temperature at magnesium alloy more than 430 ℃ and member thereof.
The present invention has following beneficial effect:
The magnesium alloy brazing solder fusion temperature scope that contains rare earth provided by the present invention is 333～356 ℃, and brazing temperature range is 400～430 ℃.Under brazing temperature, solder has good spreadability and gap fillibility, can be used for the soldering of solidus temperature at the magnesium alloy more than 430 ℃.When especially adopting this solder 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 38～39MPa, and soldering banjo fixing butt jointing tensile strength is between 53～62MPa.Do not add the AZ31B magnesium alloy joint of the congruent magnesium alloy solder brazing of rare earth and compare, soldered fitting tensile strength and shearing strength improve more than at least 30%.
The invention will be further described below in conjunction with the specific embodiment.
The specific embodiment
Embodiment 1
The chemical composition of solder and mass percent thereof are: Nd:0.5%, and Mg:45.2%, surplus is Zn.Adopt the flux protection method to carry out the brazing filler metal alloy melting, pour into ingot casting, adopt machinery to cut apart then solder is divided into rectangular bulk.The AZ31B magnesium alloy sample cleans through sand papering, acetone and removes surface contaminants before the soldering, and solder places the joint, and at the even spreading brazing flux of joint and solder position, puts into argon protective device after joint is fixed by anchor clamps and carry out high-frequency induction brazing.Argon flow amount is 0.3L/min in the brazing process, and programming rate is 300 ℃/min, and brazing temperature range is 400～430 ℃, behind the insulation 150s, 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
The chemical composition of solder and mass percent thereof are: Nd:0.89%, and Mg:49.0%, surplus is Zn.Adopt the flux protection method to carry out the brazing filler metal alloy melting, pour into ingot casting, adopt machinery to cut apart then solder is divided into rectangular bulk.The AZ31B magnesium alloy sample cleans through sand papering, acetone and removes surface contaminants before the soldering, and solder places the joint, and at the even spreading brazing flux of joint and solder position, puts into argon protective device after joint is fixed by anchor clamps and carry out high-frequency induction brazing.Argon flow amount is 0.3L/min in the brazing process, and programming rate is 300 ℃/min, and brazing temperature range is 400～430 ℃, behind the insulation 150s, 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
The chemical composition of solder and mass percent thereof are: Nd:1.5%, and Mg:47.5%, surplus is Zn.Adopt the flux protection method to carry out the brazing filler metal alloy melting, pour into ingot casting, adopt machinery to cut apart then solder is divided into rectangular bulk.The AZ31B magnesium alloy sample cleans through sand papering, acetone and removes surface contaminants before the soldering, and solder places the joint, and at the even spreading brazing flux of joint and solder position, puts into argon protective device after joint is fixed by anchor clamps and carry out high-frequency induction brazing.Argon flow amount is 0.3L/min in the brazing process, and programming rate is 300 ℃/min, and brazing temperature range is 400～430 ℃, behind the insulation 150s, 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.
The composition of the solder for preparing among table 1, the embodiment 1-3 and soldered fitting mechanical property
Claims (1)
1. a magnesium alloy brazing solder that contains rare earth is characterized in that, the chemical composition of described solder and mass percent thereof are: Nd:0.5～1.5%, and Mg:45～49%, surplus is Zn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100925783A CN101658981B (en) | 2009-09-11 | 2009-09-11 | Magnesium alloy brazing solder containing rare earth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100925783A CN101658981B (en) | 2009-09-11 | 2009-09-11 | Magnesium alloy brazing solder containing rare earth |
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| Publication Number | Publication Date |
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| CN101658981A true CN101658981A (en) | 2010-03-03 |
| CN101658981B CN101658981B (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100925783A Expired - Fee Related CN101658981B (en) | 2009-09-11 | 2009-09-11 | Magnesium alloy brazing solder containing rare earth |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191103A (en) * | 2014-08-15 | 2014-12-10 | 郑州机械研究所 | Medium-temperature magnesium alloy solder containing rare earth element La and preparing method thereof |
| CN105033499A (en) * | 2015-08-26 | 2015-11-11 | 南昌航空大学 | Heat-resistant magnesium alloy brazing filler metal for rare earth magnesium alloy brazing and preparation method of heat-resistant magnesium alloy brazing filler metal |
| CN105057912A (en) * | 2015-08-26 | 2015-11-18 | 南昌航空大学 | Magnesium-based amorphous alloy solder used for magnesium alloy brazing and preparation method for magnesium-based amorphous alloy solder |
| CN105618955A (en) * | 2016-03-10 | 2016-06-01 | 江苏科技大学 | Magnesium alloy solder used for rare earth magnesium alloy brazing and preparation method |
-
2009
- 2009-09-11 CN CN2009100925783A patent/CN101658981B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191103A (en) * | 2014-08-15 | 2014-12-10 | 郑州机械研究所 | Medium-temperature magnesium alloy solder containing rare earth element La and preparing method thereof |
| CN105033499A (en) * | 2015-08-26 | 2015-11-11 | 南昌航空大学 | Heat-resistant magnesium alloy brazing filler metal for rare earth magnesium alloy brazing and preparation method of heat-resistant magnesium alloy brazing filler metal |
| CN105057912A (en) * | 2015-08-26 | 2015-11-18 | 南昌航空大学 | Magnesium-based amorphous alloy solder used for magnesium alloy brazing and preparation method for magnesium-based amorphous alloy solder |
| CN105033499B (en) * | 2015-08-26 | 2017-03-29 | 南昌航空大学 | A kind of heat resistance magnesium alloy solder for magnesium-rare earth soldering and preparation method thereof |
| CN105618955A (en) * | 2016-03-10 | 2016-06-01 | 江苏科技大学 | Magnesium alloy solder used for rare earth magnesium alloy brazing and preparation method |
| CN105618955B (en) * | 2016-03-10 | 2018-01-12 | 江苏科技大学 | A kind of magnesium alloy brazing filler metal and preparation method for magnesium-rare earth soldering |
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| Publication number | Publication date |
|---|---|
| CN101658981B (en) | 2011-12-14 |
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Granted publication date: 20111214 Termination date: 20130911 |