CN101623800B - Magnesium-based brazing filler metal alloy and preparation method thereof - Google Patents
Magnesium-based brazing filler metal alloy and preparation method thereof Download PDFInfo
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- CN101623800B CN101623800B CN2009101844660A CN200910184466A CN101623800B CN 101623800 B CN101623800 B CN 101623800B CN 2009101844660 A CN2009101844660 A CN 2009101844660A CN 200910184466 A CN200910184466 A CN 200910184466A CN 101623800 B CN101623800 B CN 101623800B
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Abstract
The invention provides a magnesium-based brazing filler metal alloy with low working temperature and favorable welding performance as well as a preparation method thereof. The alloy comprises the following components in percentage by weight: 0.5-1.1 percent of Al, 51-60 percent of Mg, 0.5-3 percent of Sn, 0.001-0.003 percent of Be, 0.001-0.003 percent of Te, 0.1-0.4 percent of La, 2.6-8 percent of Bi, and the balance of Zn. The preparation method of the magnesium-based brazing filler metal alloy comprises the following steps: dispensing all materials according to weight percentage; heating and melting the dispensed materials in an electric stove crucible under the SF6 protective atmosphere, wherein the weight percentage of La in the middle alloy from Mg to La is 15 percent; preserving the temperature for 5-10 minutes when the temperature rises to 680-700 DEG C; and casting in a steel ingot mould which is preheated to 200 DEG C and then cooling to obtain the magnesium-based brazing filler meta alloy.
Description
Technical field
The present invention relates to a kind of easy to operately and magnesium alloy solder that welding performance is good is specifically related to a kind of magnesium-based brazing filler metal alloy, belong to the materials processing technology field.
Background technology
In recent years, along with the improvement of magnesium alloy materials performance and the expansion of application, worldwide the magnesium alloy solder technology has become the focus of welding field research.But since the magnesium alloy uniqueness, the fusing point of magnesium alloy lower (≤650 ℃), and very strong with the effect of oxygen, oxidation easily, burning etc. in the weld heating process are so the connectivity of magnesium alloy has caused people's attention.There are problems such as cost height, fusing point height, processing performance be not good in existing magnesium alloy solder and the preparation thereof.
Solder is meant to realizing the combination of two kinds of materials (or part), betwixt the other added filler in the crack or gap.The fusing point of solder must be lower than the material melting point of welding.Be suitable for connecting precision, complexity, the welding of seam and foreign peoples's material how quickly.Solder just is divided into soft solder (fusing point is lower than 450 ℃ solder) and hard solder (fusing point is higher than 450 ℃ solder) by fusing point.
Nanchang University of aviation's journal (natural science edition) the 21st the 4th phase of volume of December in 2007 has been introduced the research of Mg-Al-Zn base solder alloy, has proposed Mg-12Al-6Zn, Mg-12Al-6Zn-1.5Re, three kinds of magnesium alloy solders of Mg-8Al-3Zn-0.1Mn-1.5Re.These three kinds of alloys have good spreading property, but operating temperature is too high, is not easy to the welding of magnesium alloy.
200810115721.1 propose a kind of magnesium alloy intermediate temperature solder that contains rare earth and preparation method thereof, the component and the percentage by weight thereof of the magnesium alloy intermediate temperature solder that contains rare earth that is provided are: Al:2-10%, Zn:40-55%, Mg:38-50% and Nd:0.1-2%.The characteristics of this series alloy are that operating temperature is reduced, but spreading area does not totally have the height of above-mentioned Mg-Al-Zn base solder alloy.Adopt a large amount of covertures when it prepares in addition, the one, the impurity element in the coverture is easy to enter the microstructure that influences alloy in the alloy, be easy to being mingled with in the coverture in addition when casting ingot-forming, be involved in the macrostructure that influences solder in the alloy, finally cause the instability of solder quality and performance.
Summary of the invention
Deal with problems:
The present invention is directed to the defective that prior art exists, the magnesium-based brazing filler metal alloy that a kind of operating temperature is not high and welding performance is good is provided.
Another object of the present invention provides the preparation method of above-mentioned magnesium-based brazing filler metal alloy, and this method technology is simple, is suitable for industrialized mass.
Technical scheme:
A kind of magnesium-based brazing filler metal alloy, the quality percentage composition of this alloying component is: 0.5～1.1%Al, 51～60%Mg, 0.5～3%Sn, 0.001～0.003%Be, 0.001～0.003%Te, 0.1～0.4%La, 2.6～8%Bi, all the other are Zn.
The preparation method of magnesium-based brazing filler metal alloy of the present invention, its preparation process is as follows:
According to the quality percentage composition be 0.5～1.1%Al, 51～60%Mg, 0.5～3%Sn, 0.001～0.003%Be, 0.001～0.003%Te, 0.1～0.4%La, 2.6～8%Bi, all the other prepare burden for the alloying component proportioning of Zn, and the above-mentioned pure Al ingot for preparing, Mg ingot, pure Sn bar, pure Be piece, pure Te ingot, pure Bi powder, pure Zn ingot and Mg-La intermediate alloy body are placed on SF
6Heat fused together in the electric furnace crucible of protective atmosphere, wherein, La quality percentage composition is 15% in the Mg-La intermediate alloy; When temperature rises to 680～700 ℃, be incubated to be poured in the ingot mould that is preheating to 200 ℃ after 5～10 minutes and cool off, just obtain magnesium-based brazing filler metal alloy.
Beneficial effect of the present invention:
Magnesium-based brazing filler metal alloy of the present invention only uses common element, and process for producing is simple, and the cost of alloy is lower.
Each element mainly plays the effect of following several respects in the alloy:
One, reduces the fusing point of alloy, to reduce the operating temperature of soldering.The fusing point of Bi, Te and Sn itself is all lower, joins the fusing point that can effectively reduce alloy in the magnesium base alloy when Bi, Te and Sn unite.
Two, improve the wetability of solder, thereby improve the spreadability of material.Bi and Te can fine raising solder wetability, when particularly having Te to exist, Bi can more effectively improve the spreadability of material.
Three, improve invigoration effect to improve the bonding strength of material.Improving the invigoration effect effective method is crystal grain thinning, comprises that matrix phase and second equates precipitated phase.Sn has the effect of crystal grain thinning.La also can effectively make the coarse grain of high melting compound in the alloy change shape and evenly distribute.Sn and La compound action, the effect of crystal grain thinning is stronger.
In addition, the solution strengthening effect also helps to improve the bonding strength of material.Zinc and aluminium have the solution strengthening effect to magnesium.
Four, Be is used for suppressing the motlten metal over oxidation and prevents catching fire when gas brazing.Particularly under the condition that has La to use, the effect of Be inhibition motlten metal oxidation is more outstanding.
Five, the composition of magnesium-based brazing filler metal alloy is more approaching by the composition of weldering magnesium alloy among the present invention, makes by the shear strength of solder alloy solder joint and improves greatly.
Description of drawings
Fig. 1 the present invention be contain 0.8%Al, 53%Mg, 1.5%Sn, 0.002%Be, 0.3%La, 5%Bi, all the other are the metallographic structure of Zn magnesium-based brazing filler metal alloy.As seen from the figure, magnesium alloy crystal grain is very tiny.
The specific embodiment
Embodiment one: get the pure Al ingot of 80g, and the pure Mg ingot of 5330g, the pure Sn bar of 200g, the pure Be piece of 0.15g, the pure Te ingot of 0.15g, the pure Bi powder of 260g, the pure Zn bar of 3927g, the Mg-La intermediate alloy piece of 200g (wherein the quality percentage composition of La is 15%) is placed on SF
6In the electric furnace crucible of protective atmosphere, heat fused when temperature rises to 680～700 ℃, is incubated to be poured in the ingot mould that is preheating to 200 ℃ after 5～10 minutes and cools off, and just obtains magnesium-based brazing filler metal alloy.
Embodiment two: get the Mg-La alloy block (wherein the quality percentage composition of La is 15%) of the pure Al ingot of 50g, the pure Mg ingot of 4873g, the pure Sn bar of 50g, the pure Be piece of 0.3g, the pure Te ingot of 0.3g, the pure Bi powder of 800g and the pure Zn ingot of 3959g, 267g, be placed on SF
6In the electric furnace crucible of protective atmosphere, heat fused when temperature rises to 680～700 ℃, is incubated to be poured in the ingot mould that is preheating to 200 ℃ after 5～10 minutes and cools off, and just obtains magnesium-based brazing filler metal alloy.
Embodiment three: press 0.5%Al, and 51%Mg, 0.5%Sn, 0.001%Be, 0.001%Te, 0.1%La, 2.6%Bi, all the other are prepared burden for the percentage by weight of Zn, press the preparation of embodiment one method, obtain product 1.
Embodiment four: press 1.1%Al, and 60%Mg, 3%Sn, 0.003%Be, 0.003%Te, 0.4%La, 8%Bi, all the other are prepared burden for the percentage by weight of Zn, press the preparation of embodiment one method, obtain product 2.
Embodiment five: press 0.8%Al, and 53%Mg, 1.5%Sn, 0.002%Be, 0.002%Te, 0.3%La, 5%Bi, all the other are prepared burden for the percentage by weight of Zn, press the preparation of embodiment one method, obtain product 3.
Embodiment six: press 0.5%Al, and 56%Mg, 3%Sn, 0.003%Be, 0.003%Te, 0.1%La, 5%Bi, all the other are prepared burden for the percentage by weight of Zn, press the preparation of embodiment one method, obtain product 4.
Experimental data:
Following table is the index parameter of the magnesium-based brazing filler metal alloy of different components, and wherein comparative alloy is 200810115721.1 alloys that improve, and product 1-product 4 is for adopting the resulting product of the technology of the present invention.Shear strength is taken from the welding to the AZ31 alloy.
As seen from the above table, add Sn, Be, Te, La, Bi element in the magnesium base alloy after, the shear strength of alloy improves, spreading area increases, and operating temperature reduces.Properties of product are fine, are convenient to the welding of magnesium alloy.
Claims (2)
1. magnesium-based brazing filler metal alloy, the quality percentage composition of this alloying component is: 0.5～1.1%Al, 51～60%Mg, 0.5～3%Sn, 0.001～0.003%Be, 0.001～0.003%Te, 0.1～0.4%La, 2.6～8%Bi, all the other are Zn.
2. the preparation method of the described magnesium-based brazing filler metal alloy of claim 1, its preparation process is as follows:
According to the quality percentage composition be 0.5～1.1%Al, 51～60%Mg, 0.5～3%Sn, 0.001～0.003%Be, 0.001～0.003%Te, 0.1～0.4%La, 2.6～8%Bi, all the other prepare burden for the alloying component proportioning of Zn, and the above-mentioned pure Al ingot for preparing, Mg ingot, pure Sn bar, pure Be piece, pure Te ingot, pure Bi powder, pure Zn ingot and Mg-La intermediate alloy body are placed on SF
6Heat fused together in the electric furnace crucible of protective atmosphere, wherein, La quality percentage composition is 15% in the Mg-La intermediate alloy; When temperature rises to 680～700 ℃, be incubated to be poured in the ingot mould that is preheating to 200 ℃ after 5～10 minutes and cool off, just obtain magnesium-based brazing filler metal alloy.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009101844660A CN101623800B (en) | 2009-08-17 | 2009-08-17 | Magnesium-based brazing filler metal alloy and preparation method thereof |
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| CN2009101844660A CN101623800B (en) | 2009-08-17 | 2009-08-17 | Magnesium-based brazing filler metal alloy and preparation method thereof |
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| CN101623800B true CN101623800B (en) | 2011-05-04 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102069316B (en) * | 2011-01-05 | 2013-02-20 | 郑州机械研究所 | Brazing filler metal for brazing Al-Mg-Zn magnesium alloy |
| CN102294553B (en) * | 2011-07-21 | 2013-10-16 | 北京工业大学 | Magnesium alloy brazing filler metal containing rare-earth element Er and preparation method thereof |
| CN103769763A (en) * | 2012-10-23 | 2014-05-07 | 石瑛 | Brazing filler alloy and preparing method thereof |
| CN103769761A (en) * | 2012-10-23 | 2014-05-07 | 石瑛 | Brazing filler alloy and preparing method thereof |
| CN103769762A (en) * | 2012-10-23 | 2014-05-07 | 石瑛 | Brazing filler alloy and preparing method thereof |
| CN105149809B (en) * | 2015-10-10 | 2017-09-26 | 南京青锐风新材料科技有限公司 | It is a kind of suitable for antioxidant of SnAgCu or SnCu solders 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 |
| CN107116315A (en) * | 2017-06-23 | 2017-09-01 | 洛阳理工学院 | A kind of magnesium alloy brazing solder and preparation method thereof |
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