CN104191111B - A kind of preparation method of aluminium silicon seamless flux-cored wire of germanic, hafnium - Google Patents

A kind of preparation method of aluminium silicon seamless flux-cored wire of germanic, hafnium Download PDF

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Publication number
CN104191111B
CN104191111B CN201410402842.XA CN201410402842A CN104191111B CN 104191111 B CN104191111 B CN 104191111B CN 201410402842 A CN201410402842 A CN 201410402842A CN 104191111 B CN104191111 B CN 104191111B
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powder
aluminium
flux
cored wire
medicine core
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CN104191111A (en
Inventor
黄俊兰
龙伟民
朱坤
鲍丽
钟素娟
李永
齐剑钊
王洋
刘洁
于奇
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Zhengzhou Research Institute of Mechanical Engineering Co Ltd
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Zhengzhou Research Institute of Mechanical Engineering Co Ltd
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    • 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
    • B23K35/02—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape
    • B23K35/0222—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by mechanical features, e.g. shape for use in soldering, brazing
    • B23K35/0227—Rods, wires
    • 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
    • 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
    • B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
    • B23K35/40—Making wire or rods for soldering or welding
    • B23K35/406—Filled tubular wire or rods

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Nonmetallic Welding Materials (AREA)

Abstract

The invention discloses a kind of aluminium silicon seamless flux-cored wire of germanic, hafnium, comprise aluminium crust and the medicine core being coated on the outer intracutaneous of aluminium, in medicine core, the mass percent of each component is as follows: Si powder 35-60%, Cu powder 15-20%, Ge powder 0.08-2%, Hf powder 0.05-1%, brazing flux powder 22-40%, Al powder is 0 or surplus.Its preparation method is: get aluminium strip and aluminum pipe, calculates the gross mass of aluminium and should add the quality of medicinal powder; Take Si powder, Cu powder, Ge powder, Hf powder, brazing flux powder and Al powder in proportion to mix, dry; Be placed in flux-cored wire former, become plug after heat to compress into aluminum pipe with rolling tube reducing after aluminium strip parcel, rolling, be drawn to finished product welding wire.The advantage that the existing seamless welding wire of the welding wire that the present invention obtains is nonhygroscopic, the advantage that seamed welding wire medicinal powder is even again, yield rate is high, overcomes that silicone content in conventional fabrication techniques is high, a difficult problem for poor in processability simultaneously.

Description

A kind of preparation method of aluminium silicon seamless flux-cored wire of germanic, hafnium
Technical field
The present invention relates to aluminium alloy brazing material, especially relate to a kind of preparation method of aluminium silicon seamless flux-cored wire of germanic, hafnium.
Background technology
Al and Alalloy has the advantages such as density is little, electrical conductivity good, corrosion resistance is good, in the modern industry, especially in aviation, automobile, national defense and military fields, have extremely important using value and wide application prospect.
Aluminium silicon seamless flux-cored wire is the latest technological achievements of Al and Alalloy brazing.Along with the automation development of Al and Alalloy soldering, the promotion of corrosion-free No clean soldering tech and with aluminium for copper technology progressively deeply, the demand of market to aluminium silicon seamless flux-cored wire is increasing.
Because current aluminium silicon seamless flux-cored wire is at technology of preparing and the equal Shortcomings of aspect of performance, seriously limit the application of aluminium silicon seamless flux-cored wire:
In technology of preparing, no matter adopt powder metallurgic method or casting to prepare aluminium silicon seamless flux-cored wire, all will use hot extrusion.In hot extrusion process, during Si content height, welding wire is more crisp, and required hot extrude pressure is very large, extrudes difficulty and extrude silk easily to crack; In addition, under HTHP, core medicinal powder easily produces chemical attack with external metallization and reacts, and makes welding wire embrittlement.For this reason, someone takes flux-cored electrode tubular electrode method, although the method eliminates hot extrusion process, can solve that Si content in conventional fabrication techniques is high, the problem of poor in processability, exists and adds powder difficulty, easily causes the problem that core medicinal powder is uneven, yield rate is low.
At aspect of performance, the fusing point of existing aluminium silicon seamless flux-cored wire is higher (solidus temperature 577 DEG C, liquidus temperature more than 600 DEG C), with 3 be, the fusing point of 6 series high-strength aluminum alloys closely.During the welding wire welding low melting point aluminium alloy adopting fusing point higher, easily cause the problems such as aluminum mother plate scaling loss, Joint intensity low (during as 3003 aluminium alloy docking welding, tensile strength is only 56 MPas).
For above-mentioned problems of the prior art, improve aluminium silicon seamless flux-cored wire technology of preparing, develop the Al-Si wire that fusing point is low, plasticity good, Joint intensity is high, just become aluminium alloy element and connect the technical problem being badly in need of in manufacture solving.
Summary of the invention
The object of the present invention is to provide that a kind of fusing point is low, plasticity good, that Joint intensity is high be germanic, the preparation method of the aluminium silicon seamless flux-cored wire of hafnium.
For achieving the above object, the present invention can take following technical proposals:
The preparation method of the aluminium silicon seamless flux-cored wire of germanic, hafnium of the present invention, comprise the aluminium silicon seamless flux-cored wire by aluminium crust and germanic, the hafnium that is coated on that the medicine core of the outer intracutaneous of described aluminium forms, in described medicine core, the mass percent of each component is as follows: Si powder 35-60%, Cu powder 15-20%, Ge powder 0.08-2%, Hf powder 0.05-1%, brazing flux powder 22-40%, Al powder is 0 or surplus; Described brazing flux powder is by AlF 3, CsF, KF tri-kinds of fluoride AlF in mass ratio 3: CsF:KF=5:15:3 is formulated; The filling rate of described medicine core is 35%;
Its concrete preparation method comprises the steps:
The first step, gets aluminium strip and the aluminum pipe of certain length, calculates the gross mass of aluminium and answers the quality of dosing core powder;
Second step, takes Si powder, Cu powder, Ge powder, Hf powder, brazing flux powder and Al powder in proportion respectively, and mixes;
3rd step, dries the mixed powder of second step;
4th step, mixed powder after 3rd step being dried takes according to the quality calculated in the first step, and is placed in flux-cored wire former, forms medicine core after adopting aluminium strip parcel, become plug after heat to compress into aluminum pipe through rolling tube reducing, rolling, be drawn to finished product welding wire.
Advantage applies of the present invention following some:
(1) the aluminium silicon seamless flux-cored wire adopting said method obtained, the advantage that existing seamless welding wire is nonhygroscopic, the advantage that seamed welding wire medicinal powder is even again, yield rate is high, overcomes that silicone content in conventional fabrication techniques is high, a difficult problem for poor in processability simultaneously.
(2) the finished product welding wire prepared of the present invention is compared with similar welding wire, has that fusing point is low, plasticity good, weld strength advantages of higher, during docking welding 3003 aluminium alloy, about tensile strength can reach 85 MPas.
(3), when the welding wire prepared of the present invention is for gas brazing aluminium alloy, there is easy to operate, that applicability is strong feature, also be can be used for the automatic welding of aluminium alloy by this welding wire, substantially increase production efficiency.
In welding wire of the present invention, the effect of each component is as follows:
Si(silicon): Al-Si eutectic can be formed with Al, make solder have good fluidity and spreading property.
Cu(copper): easy and Al forms intermetallic compound, reduces the surface tension between melted material and mother metal.
Ge(germanium): the Ge of trace easily forms low melting point eutectic with Al, the fusing point of reduction brazing filler metal alloy; The interpolation of Ge makes again covalent bond in brazing filler metal alloy system reduce, and metallic bond increases, and is conducive to the fragility improving alloy intrinsic.But brittlement phase in alloy can be made after being above certain value to increase.
Hf(hafnium): the fusing point of hafnium is higher, has good antioxygenic property and high-temperature stability.In Al, the micro-solid solution of energy, forms low melting eutectics, and can accelerate Solid solution decomposition, refinement solder crystal grain.The hafnium of trace had both reduced brazing filler metal melts temperature, turn improved intensity and the plasticity of solder.
Brazing flux powder: the ability with strong dissolved oxygen aluminium, its fusion temperature is highly suitable for aluminium alloy brazing and uses.
Detailed description of the invention
Below by specific embodiment, the present invention is described in further detail.
Welding wire of the present invention adopts " FCWM50 passive drawing type flux-cored wire machine " to be prepared.The chemical composition of aluminium strip used (wide 16mm, thick 0.5mm) and aluminum pipe (wall thickness 1mm, internal diameter 5mm) sees the following form 1.
The chemical composition (wt%) of table 1 aluminium strip, aluminum pipe
Finished product welding wire medicine core traditional Chinese medicine powder filling rate is 35%, and the compacted density of medicinal powder is at 2.2 ~ 2.3g/cm 3between.
The aluminium silicon seamless flux-cored wire of germanic, hafnium of the present invention, comprise aluminium crust and be coated on the medicine core of the outer intracutaneous of aluminium, in medicine core, the mass percent of each component is as follows: Si powder 35-60%, Cu powder 15-20%, Ge powder 0.08-2%, Hf powder 0.05-1%, brazing flux powder 22-40%, Al powder is 0 or surplus; Brazing flux powder is by AlF 3, CsF, KF tri-kinds of fluoride AlF in mass ratio 3: CsF:KF=5:15:3 is formulated.
The preparation method of welding wire of the present invention is as follows:
1, intercept aluminium strip (wide 16mm, thick 0.5mm) and the aluminum pipe (wall thickness 1mm, internal diameter 5mm) of 2 meters long, the gross mass calculating aluminium is about 161.9g, and the quality should inserting medicinal powder is about 87.2g;
2, by Si powder 35-60%, Cu powder 15-20%, Ge powder 0.08-2%, Hf powder 0.05-1%, brazing flux powder is (by AlF 3, CsF, KF tri-kinds of fluoride AlF in mass ratio 3: CsF:KF=5:15:3 prepares) 22-40%, Al powder be 0 or the ratio of surplus take Si powder, Cu powder, Ge powder, Hf powder, brazing flux powder and Al powder respectively, enter in mixed powder machine and mix;
3, above-mentioned mixed powder is dried 1.5 hours under 120 DEG C of conditions;
4, the medicinal powder after oven dry is taken 87.2g and be placed in FCWM50 passive drawing type flux-cored wire machine, first aluminium strip is rolled into U-lag, after medicinal powder is put into U-lag, U-lag is healed up, medicinal powder parcel is entered, and is the plug of Φ 5mm through rolling tube reducing;
5, the plug hot pressing of Φ 5mm is entered in aluminum pipe, rolling, be drawn to the welding wire of diameter 1.0-3.2mm.As required, select different wire-drawing dies, the seamless flux-cored wire of different-diameter can be obtained.
the medicine core of 8 groups of different component proportionings is selected to be prepared into welding wire below:
Example 1: in medicine core powder, the mass percent of each component is: 60%Si powder, 15%Cu powder, 0.1%Ge powder, 0.05%Hf powder, 22% brazing flux powder, 2.85%Al powder.
Example 2: in medicine core powder, the mass percent of each component is: 55%Si powder, 18%Cu powder, 0.2%Ge powder, 0.1%Hf powder, 26.7% brazing flux powder.
Example 3: in medicine core powder, the mass percent of each component is: 50%Si powder, 18%Cu powder, 0.5%Ge powder, 0.5%Hf powder, 31% brazing flux powder.
Example 4: in medicine core powder, the mass percent of each component is: 46%Si powder, 19%Cu powder, 1%Ge powder, 0.8%Hf powder, 33.2% brazing flux powder.
Example 5: in medicine core powder, the mass percent of each component is: 45%Si powder, 20%Cu powder, 1.5%Ge powder, 0.8%Hf powder, 32.7% brazing flux powder.
Example 6: in medicine core powder, the mass percent of each component is: 40%Si powder, 20%Cu powder, 1.2%Ge powder, 0.8%Hf powder, 38% brazing flux powder.
Example 7: in medicine core powder, the mass percent of each component is: 37%Si powder, 20%Cu powder, 2%Ge powder, 1%Hf powder, 40% brazing flux powder.
Example 8: in medicine core powder, the mass percent of each component is: 35%Si powder, 20%Cu powder, 2%Ge powder, 1%Hf powder, 40% brazing flux powder, 2%Al powder.
Adopt gas brazing mode, carry out soldering with the aluminium silicon seamless flux-cored wire that above 8 kinds of component medicine cores make.Mother metal is 3003 aluminium alloys, and soldered fitting is banjo fixing butt jointing, and after soldering, tensile strength test is carried out in butt joint.On mother metal, heap applies flux-cored wire, surveys the chemical composition of deposited metal.Tensile strength result and deposited metal composition as shown in table 2.
The tensile strength of soldered fitting when table 2 medicine core component is different
Experiment proves, the aluminium silicon seamless flux-cored wire of germanic, hafnium prepared by the present invention is in aluminium alloy element welding, the tensile strength of its soldered fitting far away higher than the tensile strength of aluminum current silicon seamless flux-cored wire soldered fitting, will meet the demand of market to aluminium silicon seamless flux-cored wire.

Claims (1)

1. the preparation method of the aluminium silicon seamless flux-cored wire of germanic a, hafnium, comprise the aluminium silicon seamless flux-cored wire by aluminium crust and germanic, the hafnium that is coated on that the medicine core of the outer intracutaneous of described aluminium forms, in described medicine core, the mass percent of each component is as follows: Si powder 35-60%, Cu powder 15-20%, Ge powder 0.08-2%, Hf powder 0.05-1%, brazing flux powder 22-40%, Al powder is 0 or surplus; Described brazing flux powder is by AlF 3, CsF, KF tri-kinds of fluoride AlF in mass ratio 3: CsF:KF=5:15:3 is formulated; The filling rate of described medicine core is 35%; It is characterized in that: concrete preparation method comprises the steps:
The first step, gets aluminium strip and the aluminum pipe of certain length, calculates the gross mass of aluminium and answers the quality of dosing core powder;
Second step, takes Si powder, Cu powder, Ge powder, Hf powder, brazing flux powder and Al powder in proportion respectively, and mixes;
3rd step, dries the mixed powder of second step;
4th step, mixed powder after 3rd step being dried takes according to the quality calculated in the first step, and is placed in flux-cored wire former, forms medicine core after adopting aluminium strip parcel, become plug after heat to compress into aluminum pipe through rolling tube reducing, rolling, be drawn to finished product welding wire.
CN201410402842.XA 2014-08-15 2014-08-15 A kind of preparation method of aluminium silicon seamless flux-cored wire of germanic, hafnium Active CN104191111B (en)

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US10421159B2 (en) 2015-02-25 2019-09-24 Hobart Brothers Llc Systems and methods for additive manufacturing using aluminum metal-cored wire
US11426821B2 (en) 2015-02-25 2022-08-30 Hobart Brothers Llc Aluminum metal-cored welding wire
CN105499827A (en) * 2016-02-01 2016-04-20 天津大学 Low-melting-point intermediate-temperate aluminum brazing flux for brazing aluminum and aluminum alloy, and preparation method of low-melting-point intermediate-temperate aluminum brazing flux
CN108213768A (en) * 2018-01-08 2018-06-29 浙江亚通焊材有限公司 A kind of novel almit flux-cored wire
CN111015016A (en) * 2019-12-05 2020-04-17 渤海造船厂集团有限公司 Welding wire for ultra-low carbon martensite non-consumable electrode gas shielded welding
CN111618476B (en) * 2020-06-01 2021-12-21 南京航空航天大学 High-strength aluminum-silicon alloy welding wire
CN112025136B (en) * 2020-07-14 2021-12-14 广东省科学院中乌焊接研究所 Aluminum alloy welding wire suitable for arc fuse additive manufacturing and preparation method thereof
CN112621015B (en) * 2020-12-25 2022-07-26 中机智能装备创新研究院(宁波)有限公司 Flux-cored aluminum brazing filler metal and preparation method thereof
CN113118606B (en) * 2021-03-29 2022-10-21 中国商用飞机有限责任公司北京民用飞机技术研究中心 Electron beam fuse material additive manufacturing method for large titanium-aluminum alloy component
CN113084390A (en) * 2021-04-12 2021-07-09 郑州机械研究所有限公司 Multilayer flux-cored silver solder and preparation method thereof

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