CN103170758A - Aluminum base brazing filler metal including scandium and strontium and preparation method thereof - Google Patents
Aluminum base brazing filler metal including scandium and strontium and preparation method thereof Download PDFInfo
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- CN103170758A CN103170758A CN2011104412524A CN201110441252A CN103170758A CN 103170758 A CN103170758 A CN 103170758A CN 2011104412524 A CN2011104412524 A CN 2011104412524A CN 201110441252 A CN201110441252 A CN 201110441252A CN 103170758 A CN103170758 A CN 103170758A
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Abstract
The invention relates to aluminum base materials including scandium and strontium and belongs to the technical field of aluminum and aluminum alloy welding. Brazing filler metal comprises, by weight, 17%-22% of copper, 6%-9% of silicon, 0.05%-0.25% of the scandium, 0.01%-0.05% of the strontium and surplus of aluminum. Melting temperature of the aluminum base brazing filler metal including the scandium and the strontium is from 510 DEG C to 545 DEG C. Brazing temperature of the aluminum base brazing filler metal including the scandium and the strontium is from 535 DEG C to 570 DEG C. The aluminum base brazing filler metal including the scandium and the strontium has the advantages of being capable of having good comprehensive properties such as good wettability and spreadability, strong strength of soldered joint, suitable for brazing 6063 alloy, 6061 alloy and the like wherein the 6063 alloy, the 6061 alloy and the like are capable of being in heat treatment and strengthened, and capable of completing brazing and simultaneously meeting technical requirements of the heat treatment of alloy parts.
Description
Technical field
The present invention relates to aluminium base solder of a kind of Sc of containing and Sr and preparation method thereof, particularly a kind of Al-Si base solder that contains Sc and Sr and preparation method thereof, be applicable to the soldering high-strength aluminum alloy, belongs to aluminium and aluminum alloy solder technology field.
Background technology
Extensive use along with aluminium alloy in modern industry, the application of aluminium alloy brazing structural member also increase thereupon.Because Al-Si solder fusing point is high, liquidus curve be 577 ℃, the aluminium alloy that the soldering fusing point is relatively low easily makes the grain growth of matrix material generation corrode, material.At present, Al-Si, Al-Si-Cu, Al-Si-Mg, the Al-Si-Zn solder of the conventional trade mark is high due to brazing temperature, soldered fitting intensity is low or poor corrosion resistance etc. is difficult to satisfy that the aluminium alloy brazing temperature such as 6061,6063 are low, the requirement of soldered fitting intensity high-technology, for satisfying the specification requirement of high strength aluminium alloy brazing connection reliability, the present invention has developed a kind of aluminium base solder that adds the constituent elements such as a certain proportion of Sc and Sr.
Summary of the invention
The present invention is directed to existing technical problem, provide a kind of fusion temperature scope at 510～545 ℃, brazing temperature is at 535～570 ℃, the aluminium base solder that contains Sc and Sr with good wetability and spreadability and the high comprehensive premium properties of soldered fitting intensity improves the comprehensive technical performance of soldered fitting by adding the constituent elements such as a certain proportion of Sc and Sr.
The aluminium base solder that contains Sc and Sr involved in the present invention, the chemical composition of solder and quality percentage composition thereof are: 17～22% Cu, 6～9% Si, 0.05～0.25% Sc, 0.01～0.05% Sr, surplus is Al,
Wherein the mass ratio of Sc/ Sr is 5～10.
On the basis of Al-Si-Cu base solder, the crystal grain that the interpolation of a small amount of Sc can the refinement brazed seam, even tissue forms a small amount of Al simultaneously
3Sc can obviously improve the intensity of weld seam.The interpolation of trace Sr can improve corrosion resistance greatly.Along with the increase of Sc content, unbalance due to excessive interpolation and Sc/Sr ratio, Sc/Sr easily produces the mutually complicated of infusibility with the Al triplicity, causes suppressing or reducing Al
3The generation of Sc, not only the raising of the intensity of butt welded seam can not be played active and effective effect, and weld seam fragility increases simultaneously.The mass ratio that experiment showed, Sc/Sr is 5～10, can produce a certain amount of Al
3The Sc hardening constituent, the simultaneously interpolation of Sr can suppress the segregation forming core, reduces the second phase particles that causes fragility, and therefore the crystal grain of refinement brazed seam and the optimization of institutional framework can improve the fragility of soldered fitting, improve the processing performance of soldering.
The present invention contains the preparation method of the aluminium base solder of Sc and Sr, comprise: at first proportionally prepare burden, raw material adopt Al-Si, Al-Cu, Al-Sc, Al-Sr and rafifinal, melting prepares the solder mother alloy ingot, then adopts vacuum quick quenching technology, vacuum aerosolization technology or machine cuts to prepare respectively foil, powder or block solder.
Solder foundry alloy of the present invention adopts conventional at present aluminium alloy smelting technology of preparing; after the preparation of solder mother alloy ingot is completed; concrete type of service requirement according to solder; can be prepared into respectively foil by vacuum quick quenching technology, vacuum aerosolization technology and machine cuts; powder; the block solder form that waits is used, and is applicable to the welding procedures such as gas brazing, atmosphere protection soldering, vacuum brazing and salt bath brazing.
The aluminium base solder that contains Sc and Sr of the present invention, the fusion temperature scope of solder is 510～545 ℃, brazing temperature is 535～570 ℃, has the high comprehensive premium properties of good wetability and spreadability and soldered fitting intensity.Be fit to the soldering of the heat-treatable strengthened alloys such as 6063,6061, can satisfy and complete simultaneously in soldering, complete the heat treated specification requirement of alloy component.
The present invention will be further described below by the specific embodiment, but and do not mean that limiting the scope of the invention.
The specific embodiment
Embodiment 1
Chemical composition and the mass percent thereof of solder be, 19%Cu, and 8%Si, 0.17%Sc, 0.02%Sr, the Al surplus, wherein the mass ratio of Sc/Sr is 8.5.At first by batching, raw material adopt Al-Si, Al-Cu, Al-Sc, Al-Sr and rafifinal, adopt conventional aluminium alloy smelting technology to complete the preparation of solder mother alloy ingot, then adopt the vacuum quick quenching technology to prepare thickness 0.07mm, the amorphous foil of width 40mm, be used for thick 6063 sheet alloys of soldering 2.5mm, braze-welded structure is joint form, 526～531 ℃ of solder fusion temperatures, 560 ℃ of brazing temperatures, temperature retention time 10 minutes, postwelding is heat-treated according to 6063 alloy solid solution ag(e)ing conditions, and the soldered fitting shear strength is greater than 70MPa.
Embodiment 2
Chemical composition and the mass percent thereof of solder be, 18%Cu, and 8%Si, 0.15Sc%, 0.025Sr, the Al surplus, wherein the mass ratio of Sc/Sr is 6.At first by batching, raw material adopt Al-Si, Al-Cu, Al-Sc, Al-Sr and rafifinal, adopt conventional aluminium alloy smelting technology to complete the preparation of solder mother alloy ingot, then adopt the vacuum quick quenching technology, preparation thickness 0.07mm, the amorphous foil of width 40mm, be used for thick 6063 sheet alloys of soldering 2.5mm, braze-welded structure is joint form, 528～534 ℃ of solder fusion temperatures, 565 ℃ of brazing temperatures, temperature retention time 10 minutes, postwelding is heat-treated according to 6063 alloy solid solution ag(e)ing conditions, and the soldered fitting shear strength is greater than 75MPa.
Embodiment 3
Chemical composition and the mass percent thereof of solder be, 17%Cu, and 9%Si, 0.25%Sc, 0.05%Sr, the Al surplus, wherein the mass ratio of Sc/Sr is 5.At first by batching, raw material adopt Al-Si, Al-Cu, Al-Sc, Al-Sr and rafifinal, adopt conventional aluminium alloy smelting technology to complete the preparation of solder mother alloy ingot, then adopt vacuum aerosolization technology to be prepared into powder brazing alloy, be used for thick 6061 sheet alloys of soldering 2.0mm, braze-welded structure is joint form, 530～538 ℃ of solder fusion temperatures, 565 ℃ of brazing temperatures, temperature retention time 8 minutes, postwelding is heat-treated according to 6061 alloy solid solution ag(e)ing conditions, and the soldered fitting shear strength is greater than 65MPa.
Embodiment 4
Chemical composition and the mass percent thereof of solder be, 22%Cu, and 6%Si, 0.05%Sc, 0.01%Sr, the Al surplus, wherein the mass ratio of Sc/Sr is 5.At first by batching, raw material adopt Al-Si, Al-Cu, Al-Sc, Al-Sr and rafifinal, adopt conventional aluminium alloy smelting technology to complete the preparation of solder mother alloy ingot, then adopt machine cuts that solder is divided into thickness＜1mm solder bar, be used for thick 6061 sheet alloys of soldering 3.5mm, braze-welded structure is joint form, 520～529 ℃ of solder fusion temperatures, 555 ℃ of brazing temperatures, temperature retention time 12 minutes, postwelding is heat-treated according to 6061 alloy solid solution ag(e)ing conditions, and the soldered fitting shear strength is greater than 65MPa.
Embodiment 5
Chemical composition and the mass percent thereof of solder be, 20%Cu, and 7%Si, 0.2%Sc, 0.02%Sr, the Al surplus, wherein the mass ratio of Sc/Sr is 10.At first by batching, raw material adopt Al-Si, Al-Cu, Al-Sc, Al-Sr and rafifinal, adopt conventional aluminium alloy smelting technology to complete the preparation of solder mother alloy ingot, then adopt vacuum aerosolization technology to be prepared into powder brazing alloy, be used for thick 6061 sheet alloys of soldering 2.0mm, braze-welded structure is joint form, 523～532 ℃ of solder fusion temperatures, 560 ℃ of brazing temperatures, temperature retention time 8 minutes, postwelding is heat-treated according to 6061 alloy solid solution ag(e)ing conditions, and the soldered fitting shear strength is greater than 70MPa.
Claims (3)
1. aluminium base solder that contains Sc and Sr, it is characterized in that: its composition and quality percentage composition thereof are Cu:17～22%, Si:6～9%, Sc:0.05～0.25%, Sr:0.01～0.05%, surplus is Al.
2. the aluminium base solder that contains Sc and Sr according to claim 1, it is characterized in that: the mass ratio of described Sc and Sr is 5～10.
3. the described preparation method who contains the aluminium base solder of Sc and Sr of claim 1 or 2, comprise: at first proportionally prepare burden, raw material adopt Al-Si, Al-Cu, Al-Sc, Al-Sr and aluminium, melting prepares the solder mother alloy ingot, then adopts vacuum quick quenching technology, vacuum aerosolization technology or machine cuts to prepare respectively foil, powder or block solder.
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| CN2011104412524A CN103170758A (en) | 2011-12-26 | 2011-12-26 | Aluminum base brazing filler metal including scandium and strontium and preparation method thereof |
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| CN2011104412524A CN103170758A (en) | 2011-12-26 | 2011-12-26 | Aluminum base brazing filler metal including scandium and strontium and preparation method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191104A (en) * | 2014-08-28 | 2014-12-10 | 青岛永通电梯工程有限公司 | Low-temperature brazing filler metal for Al-Si-Mg system aluminum alloy brazing |
| CN104191102A (en) * | 2014-08-15 | 2014-12-10 | 郑州机械研究所 | Low-brittleness medium-temperature aluminum alloy brazing material and preparation process thereof |
| CN104827200A (en) * | 2015-05-13 | 2015-08-12 | 北京工业大学 | Al-Si-SC series welding wire for laser welding of high-strength aluminum alloy |
| CN105345307A (en) * | 2015-10-29 | 2016-02-24 | 中国航空工业集团公司北京航空材料研究院 | Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy |
| CN105345309A (en) * | 2015-10-29 | 2016-02-24 | 中国航空工业集团公司北京航空材料研究院 | Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy |
| CN105345306A (en) * | 2015-10-29 | 2016-02-24 | 中国航空工业集团公司北京航空材料研究院 | Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy |
| US11471984B2 (en) | 2018-06-28 | 2022-10-18 | Scandium International Mining Corporation | Control of recrystallization in cold-rolled AlMn(Mg)ScZr sheets for brazing applications |
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| CN1555961A (en) * | 2004-01-10 | 2004-12-22 | 大连理工大学 | Composite solder ball and its preparation method |
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| EP0145933A1 (en) * | 1983-12-06 | 1985-06-26 | Allied Corporation | Low temperature aluminum based brazing alloys |
| CN1555961A (en) * | 2004-01-10 | 2004-12-22 | 大连理工大学 | Composite solder ball and its preparation method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104191102A (en) * | 2014-08-15 | 2014-12-10 | 郑州机械研究所 | Low-brittleness medium-temperature aluminum alloy brazing material and preparation process thereof |
| CN104191104A (en) * | 2014-08-28 | 2014-12-10 | 青岛永通电梯工程有限公司 | Low-temperature brazing filler metal for Al-Si-Mg system aluminum alloy brazing |
| CN104827200A (en) * | 2015-05-13 | 2015-08-12 | 北京工业大学 | Al-Si-SC series welding wire for laser welding of high-strength aluminum alloy |
| CN105345307A (en) * | 2015-10-29 | 2016-02-24 | 中国航空工业集团公司北京航空材料研究院 | Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy |
| CN105345309A (en) * | 2015-10-29 | 2016-02-24 | 中国航空工业集团公司北京航空材料研究院 | Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy |
| CN105345306A (en) * | 2015-10-29 | 2016-02-24 | 中国航空工业集团公司北京航空材料研究院 | Welding wire used for Al-Cu-Li system aluminum lithium alloy and Al-Cu system aluminum alloy |
| CN105345309B (en) * | 2015-10-29 | 2017-12-01 | 中国航空工业集团公司北京航空材料研究院 | A kind of welding wire for being used for Al Cu Li system's aluminium lithium alloys and Al Cu line aluminium alloys |
| US11471984B2 (en) | 2018-06-28 | 2022-10-18 | Scandium International Mining Corporation | Control of recrystallization in cold-rolled AlMn(Mg)ScZr sheets for brazing applications |
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Application publication date: 20130626 |