CN103567584A - Aluminum alloy brazing method and brazing filler metal material - Google Patents

Aluminum alloy brazing method and brazing filler metal material Download PDF

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Publication number
CN103567584A
CN103567584A CN201310539316.3A CN201310539316A CN103567584A CN 103567584 A CN103567584 A CN 103567584A CN 201310539316 A CN201310539316 A CN 201310539316A CN 103567584 A CN103567584 A CN 103567584A
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CN
China
Prior art keywords
solder
temperature
filler metal
solder flux
brazing filler
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Pending
Application number
CN201310539316.3A
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Chinese (zh)
Inventor
顾建
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Individual
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Individual
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Priority to CN201310539316.3A priority Critical patent/CN103567584A/en
Publication of CN103567584A publication Critical patent/CN103567584A/en
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Classifications

    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/19—Soldering, e.g. brazing, or unsoldering taking account of the properties of the materials to be soldered
    • 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
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
    • B23K1/203—Fluxing, i.e. applying flux onto surfaces
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/24—Selection of soldering or welding materials proper
    • B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
    • B23K35/286—Al as the principal constituent
    • B23K35/288—Al as the principal constituent with Sn or Zn
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
    • B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
    • B23K35/3601—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with inorganic compounds as principal constituents
    • B23K35/3603—Halide salts
    • B23K35/3605—Fluorides
    • 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
    • B23K2103/10—Aluminium or alloys thereof

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)

Abstract

The invention relates to an aluminum alloy brazing method and a brazing filler metal material. If the starting flowing temperature of a brazing filler metal is set as Tf and the starting flowing temperature of a flux is set as Ts, the Tf is lower than the Ts, and the difference is no more than 5 DEG C; and the brazing filler metal and the flux flow simultaneously. The brazing filler metal comprises the components in percentage by weight as follows: 8.5% of silicon, 1.22% of magnesium, 2.1% of zinc, 2.4% of copper, 0.03% of zirconium, 0.012% of iron and the balance of aluminum.

Description

A kind of aluminium alloy brazing method and solder material
Technical field
The invention belongs to Welded field, specifically refer to the non-aggressive method for welding of the aluminum alloy materials that contains magnesium and a kind of composition material of aluminium alloy brazing filler metal.
Background technology
Because aluminium alloy contains magnesium, so improve intensity.Its result, realizes lightweight, the thinning of goods.But in the situation that non-aggressive method for welding in the past, the fluorine in solder flux reacts with the magnesium in aluminium alloy, on aluminium surface, form the high melting compound of magnesium fluoride (MgF2) etc.Can consider that this reaction can reduce the effect of the oxide-film having except deflux, and then hinder the expansion of soaking of solder, thereby reduce braze ability.
The method of diffusion impervious layer is set, and the diffusion length of the magnesium owing to need to make barrier layer heat than soldering time is thick, so can not make the attenuation of soldering lug own.And, because the solder flux cost that contains caesium is very high, so there is the poor shortcoming of production.
In the method, in order to guarantee the cooperation of solder, need to develop a kind of solder of needs.
Summary of the invention
The object of the invention is prior art to propose improvement project, improve the performance of aluminum alloy materials soldering.
The present invention is achieved by the following technical solutions:
A kind of method for welding of aluminum alloy materials, in inert gas atmosphere, use noncorrosive fluorides solder flux to carry out the method for soldering, when the beginning flowing temperature of solder is made as to Tf, when the beginning flowing temperature of solder flux is made as to Ts, described Tf is less than Ts, poor 5 degree that are no more than; Described solder and solder flux flow simultaneously.
The solidus temperature of solder flux and the difference of liquidus temperature are in 30 ℃.
A material, the consisting of of aluminium alloy in solder is the silicon of 8-9% by weight percentage, the zinc of the magnesium of 1.0-2.0%, 1.5-2.5%, the zirconium of the copper of 1.5-3.5%, 0.01-0.1%, the aluminium of the iron of 0.005-0.03% and surplus.
Be to be 8.5% silicon, 1.22% magnesium, 2.1% zinc, 2.4% copper, 0.03% zirconium, 0.012% iron and the aluminium of surplus by weight percentage preferred composition.
When the beginning flowing temperature of solder is made as to Tf, when the beginning flowing temperature of solder flux is made as to Ts, described Tf is less than Ts, poor 5 degree that are no more than; Described solder and solder flux flow simultaneously.
The solidus temperature of solder and the difference of liquidus temperature are in 30 ℃.
The invention has the beneficial effects as follows:
Before the effect of removing oxide-film producing with reacting of magnesium by the fluorine in losing solder flux, make solder flow, and can obtain good braze ability.
The specific embodiment
A kind of method for welding of aluminum alloy materials, in inert gas atmosphere, use noncorrosive fluorides solder flux to carry out the method for soldering, when the beginning flowing temperature of solder is made as to Tf, when the beginning flowing temperature of solder flux is made as to Ts, described Tf is less than Ts, poor 5 degree that are no more than; Described solder and solder flux flow simultaneously.
The percentage by weight of described Magnesium in Aluminum Alloys is 1.15%-1.35%.This is because when Mg content lacks, few with reacting of solder flux, uses the existing method for welding also can soldering.In addition, this is because when content of magnesium is too much, when heating, soldering reacts rapidly with the fluorine in solder flux, and the high melting compound of formation magnesium fluoride etc., and hinder braze ability.
The solidus temperature of solder and the difference of liquidus temperature are in 30 ℃.
The solidus temperature of solder flux and the difference of liquidus temperature are in 30 ℃.
In method for welding of the present invention, the most important condition of braze ability is that solder flux and solder start flowing temperature.The beginning flowing temperature of the solder flux of saying here and solder is defined as in soldering heating process solder flux and solder melting and starts to soak the temperature of expansion.A lot of solder flux, solder solidus temperature are different from liquidus temperature, become the state of solid-liquid mixing in the way of heating up, and when the ratio of liquid phase is about 70%, start to flow.Thereby, start mobile temperature between solidus temperature and liquidus temperature, when this temperature difference is made as to 100, be defined as than the temperature of high about 70 left and right of solidus temperature.
Solder is than solder flux first in mobile situation, and at solder flux, before aluminium surface expand and removed oxide-film, it is surperficial that solder has covered aluminium.
Solder flux use using in the composition being formed by KA1F4, K2A1F5, K2A1F5H20, K3A1F6 at least one as main component, but can be also other solder flux such as CsA1F class or KZnF3 class.The mixture of the mixture of KA1F4 and K2A1F5H20 or KA1F4 and K3A1F6 preferably.The ratio that starts the mixture that the adjustment of flowing temperature, solidus temperature and liquidus temperature can be by the mentioned component in solder flux regulates.
Starting flowing temperature, solidus temperature and liquidus temperature can suitably adjust by the composition of the silicon in solder, zinc, copper.The consisting of of aluminium alloy in solder is the silicon of 8-9% by weight percentage, the zinc of the magnesium of 1.0-2.0%, 1.5-2.5%, the zirconium of the copper of 1.5-3.5%, 0.01-0.1%, the aluminium of the iron of 0.005-0.03% and surplus.
Be to be 8.5% silicon, 1.22% magnesium, 2.1% zinc, 2.4% copper, 0.03% zirconium, 0.012% iron and the aluminium of surplus by weight percentage preferred composition.
The manufacture method of aluminum alloy heat exchanger of the present invention, owing to using above-mentioned method for welding, the aluminum alloy materials that contains magnesium as use utilizes non-aggressive method for welding to manufacture the method for heat exchanger.

Claims (6)

1. the method for welding of an aluminum alloy materials, it is characterized in that: in inert gas atmosphere, use noncorrosive fluorides solder flux to carry out the method for soldering, when the beginning flowing temperature of solder is made as to Tf, when the beginning flowing temperature of solder flux is made as to Ts, described Tf is less than Ts, poor 5 degree that are no more than; Described solder and solder flux flow simultaneously.
2. the method for welding of aluminum alloy materials according to claim 1, is characterized in that: the solidus temperature of solder flux and the difference of liquidus temperature are in 30 ℃.
3. an aluminium alloy brazing filler metal material, it is characterized in that: the consisting of of aluminium alloy in solder is the silicon of 8-9% by weight percentage, the zinc of the magnesium of 1.0-2.0%, 1.5-2.5%, the zirconium of the copper of 1.5-3.5%, 0.01-0.1%, the aluminium of the iron of 0.005-0.03% and surplus.
4. aluminium alloy brazing filler metal material according to claim 3, is characterized in that: be to be 8.5% silicon, 1.22% magnesium, 2.1% zinc, 2.4% copper, 0.03% zirconium, 0.012% iron and the aluminium of surplus by weight percentage preferred composition.
5. according to the aluminium alloy brazing filler metal material described in claim 3 or 4, it is characterized in that: when the beginning flowing temperature of solder is made as to Tf, when the beginning flowing temperature of solder flux is made as to Ts, described Tf is less than Ts poor 5 degree that are no more than; Described solder and solder flux flow simultaneously.
6. according to the aluminium alloy brazing filler metal material described in claim 3 or 4, it is characterized in that: the solidus temperature of solder and the difference of liquidus temperature are in 30 ℃.
CN201310539316.3A 2013-11-04 2013-11-04 Aluminum alloy brazing method and brazing filler metal material Pending CN103567584A (en)

Priority Applications (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106735673A (en) * 2016-11-23 2017-05-31 虞海盈 The method for welding of aluminium alloy containing magnesium
CN108136545A (en) * 2015-10-05 2018-06-08 海德鲁铝业钢材有限公司 Aluminium composite material and its production method in the thermal bonding method of fluxless

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101176955A (en) * 2006-11-10 2008-05-14 航天材料及工艺研究所 Soldering wire for high-strength aluminum copper alloy
CN101745751A (en) * 2009-12-23 2010-06-23 哈尔滨工业大学 Welding wire for connection of aluminum/steel dissimilar alloy and processing process thereof
CN103286472A (en) * 2013-05-21 2013-09-11 辽宁石油化工大学 Novel aluminum alloy welding wire and application thereof
CN103567656A (en) * 2013-10-28 2014-02-12 顾建 Brazing material for aluminum alloy
CN103567588A (en) * 2013-11-04 2014-02-12 顾建 Aluminum alloy brazing method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101176955A (en) * 2006-11-10 2008-05-14 航天材料及工艺研究所 Soldering wire for high-strength aluminum copper alloy
CN101745751A (en) * 2009-12-23 2010-06-23 哈尔滨工业大学 Welding wire for connection of aluminum/steel dissimilar alloy and processing process thereof
CN103286472A (en) * 2013-05-21 2013-09-11 辽宁石油化工大学 Novel aluminum alloy welding wire and application thereof
CN103567656A (en) * 2013-10-28 2014-02-12 顾建 Brazing material for aluminum alloy
CN103567588A (en) * 2013-11-04 2014-02-12 顾建 Aluminum alloy brazing method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108136545A (en) * 2015-10-05 2018-06-08 海德鲁铝业钢材有限公司 Aluminium composite material and its production method in the thermal bonding method of fluxless
CN108136545B (en) * 2015-10-05 2019-11-01 海德鲁铝业钢材有限公司 Aluminium composite material and its production method in the thermal bonding method of fluxless
CN106735673A (en) * 2016-11-23 2017-05-31 虞海盈 The method for welding of aluminium alloy containing magnesium

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Application publication date: 20140212