WO2012043030A1 - アルミニウム合金部材の面ろう付け方法 - Google Patents

アルミニウム合金部材の面ろう付け方法 Download PDF

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Publication number
WO2012043030A1
WO2012043030A1 PCT/JP2011/066790 JP2011066790W WO2012043030A1 WO 2012043030 A1 WO2012043030 A1 WO 2012043030A1 JP 2011066790 W JP2011066790 W JP 2011066790W WO 2012043030 A1 WO2012043030 A1 WO 2012043030A1
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Prior art keywords
brazing
aluminum alloy
mass
temperature
alloy member
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PCT/JP2011/066790
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English (en)
French (fr)
Japanese (ja)
Inventor
貴訓 小久保
堀　久司
智浩 佐々木
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日本軽金属株式会社
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Priority to KR1020137007376A priority Critical patent/KR101504046B1/ko
Priority to CN201180040501.7A priority patent/CN103068512B/zh
Publication of WO2012043030A1 publication Critical patent/WO2012043030A1/ja

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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
    • B23K35/0233—Sheets, foils
    • 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
    • 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
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • 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
    • 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
    • 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
    • B23K35/38—Selection of media, e.g. special atmospheres for surrounding the working area
    • B23K35/383—Selection of media, e.g. special atmospheres for surrounding the working area mainly containing noble gases or nitrogen
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C21/00—Alloys based on aluminium
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • C22C21/04—Modified aluminium-silicon alloys
    • 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

Definitions

  • the present invention relates to a method of brazing aluminum alloy members to each other without flux in an inert gas atmosphere using a brazing sheet.
  • the conventional brazing techniques have been based on line contact so that a fillet shape is obtained.
  • a brazing method for example, when the lower plate is a brazing sheet and a plate-like fin is joined vertically thereto, the molten brazing material flows on the brazing sheet to form a fillet.
  • brazing is generally performed using a flux in the air or in an inert gas atmosphere in order to suppress oxidation during brazing heating. ing.
  • a brazing sheet in which three or five clad layers are formed and an Al—Si alloy brazing material is clad as an intermediate material between a thin skin material and a core material is brazed in an inert gas with no flux.
  • a method has been developed.
  • an Al—Si alloy brazing material is used as an intermediate material between a thin skin material and a core material, and the thin skin material and the core material have a solidus temperature higher than the liquidus temperature of the brazing material.
  • An aluminum alloy is used, the thickness of the entire brazing sheet is 0.05 to 2.0 mm, and the clad rate of the thin skin material is set to 0.1 to 10%.
  • This thin skin material is a brazing material melted by heating.
  • an aluminum alloy brazing sheet that is brazed without flux in an inert gas atmosphere that is a thin skin material that melts in contact therewith.
  • a demand for a heat exchange system that cools heat generated by an in-vehicle IGBT or the like by surface contact is increasing, and a technique for brazing the surfaces of aluminum plate materials with a brazing material is required.
  • a brazing material is inserted between the surfaces of the aluminum plate material and brazing heating is performed, so that void defects or the like are likely to occur at the joint, and the use of flux makes it easy to contain the flux. ing.
  • the aluminum thin laminated plate material is made of a thin laminated plate material having a three-layer structure
  • the core material is made of a brazing material having a melting point of 600 ° C.
  • both skin materials are made of an aluminum alloy having a melting point higher than that of the core material, and
  • 0.1 to 6% (mass%, the same shall apply hereinafter) of Mg or 0.01 to 1% of Bi is further added to one or more of the core materials, and the entire overlapped member is pressed and adhered.
  • the aluminum alloy is heated to a temperature not lower than the liquidus temperature of the brazing material and not exceeding the minimum value of the solidus temperature of each member other than the brazing material.
  • Atmospheric flux-free superimposed brazing method has been developed of. Japanese Patent No.
  • 4547032 discloses an Al—Si brazing material containing, by mass, 0.1 to 5.0% Mg and 3 to 13% Si, with the balance being Al and inevitable impurities.
  • An aluminum clad material that is clad by a material and located on the outermost surface is heated by bringing the Al-Si brazing material and a member to be brazed into close contact with each other in a non-oxidizing atmosphere without pressure reduction, and heating the core material And a method for joining the brazing target member.
  • the brazing sheet used is a three-layer or five-layer clad material, although it can be laminated and brazed without flux in the atmosphere by the techniques proposed in the above-mentioned Patent Nos. 3780380 and 3701847. Cost will increase. Further, in the technique proposed in Japanese Patent No. 4547032, the contact state between the brazing material and the member to be brazed is merely ambiguously defined as “contact adhesion”, so that a stable brazed state is obtained. It was difficult. Therefore, it is desired to develop a surface brazing technique that is low in cost and stable in quality as compared with the prior art.
  • the present invention has been devised to solve such a problem, and an object thereof is to provide a technique for brazing two aluminum alloy members to each other with a single layer brazing sheet without flux. It is. It is another object of the present invention to provide a technique for brazing one aluminum alloy member and a skin material constituting the two-layer brazing sheet with a two-layer brazing sheet.
  • the surface brazing method for an aluminum alloy member of the present invention includes Si: 3 to 12% by mass, Mg: 0.1 to 5.0% by mass, with the balance being Al and inevitable impurities.
  • the aluminum alloy members are brazed to each other using a single layer brazing sheet made of a brazing material with a thickness of 15 to 200 ⁇ m, and the brazing sheet has a solidus temperature of 570 ° C.
  • the surface pressure of 0.6 gf / mm 2 or more is applied while maintaining the brazing temperature at 570 ° C. or higher in an inert gas atmosphere in a state of sandwiching the surfaces between the aluminum alloy members as described above.
  • it is characterized by brazing aluminum alloy members without flux. Further, it contains Si: 3 to 12% by mass, Mg: 0.1 to 5.0% by mass, and the balance is composed of Al and inevitable impurities, and the brazing material and solid phase have a thickness of 15 to 200 ⁇ m.
  • a method of brazing an aluminum alloy member and the skin material using a two-layer brazing sheet comprising a skin material made of an aluminum alloy plate having a linear temperature of 570 ° C. or higher, the two-layer brazing sheet 0.6 gf / mm 2 while maintaining the brazing temperature at 570 ° C. or higher in an inert gas atmosphere in a state where the brazing filler metal surface is in surface contact with an aluminum alloy member having a solidus temperature of 570 ° C. or higher.
  • the aluminum alloy member and the skin material may be brazed without flux while applying the above surface pressure.
  • Cu, Mn, and Zn as unavoidable impurities contained in the brazing material are each preferably less than 1.0% by mass.
  • the brazing material is preferably 15 to 150 ⁇ m thick, more preferably 20 to 100 ⁇ m thick.
  • the aluminum alloy member to be surface brazed is AA1000 type, and the oxide film formed on the brazed surface preferably has a thickness of 30 nm or less.
  • the solidus temperature of the aluminum alloy member or the aluminum alloy member and the skin material is preferably 580 ° C. or higher, and the brazing temperature is 580 ° C. or higher.
  • the holding time at the brazing temperature during surface brazing is preferably 2 minutes or more, particularly 5 minutes or more.
  • the inert gas at the time of surface brazing is nitrogen gas, and the oxygen concentration of the inert gas is 500 ppm or less.
  • a single layer brazing sheet or a two-layer brazing sheet allows two aluminum alloy members to be flux-free and a surface pressure between the two aluminum alloy members. And brazing the surface. Since a brazing sheet made of a three-layer or five-layer clad material is not used but a single-layer or two-layer brazing sheet is used, the overall cost can be reduced. Moreover, since the surface pressure is applied between the two aluminum alloy members without using the flux and brazing is performed, void defects or the like that are likely to occur between the two aluminum alloy members can be suppressed. Stable surface brazing can be performed.
  • FIG. 1 is a diagram for explaining the shape of an inverted T-shaped test piece.
  • FIG. 2 is a conceptual diagram illustrating a small brazing test furnace.
  • FIG. 3 is a conceptual diagram illustrating a shear test method.
  • FIG. 4 is a diagram showing the influence of brazing temperature and holding time.
  • FIG. 5 is a diagram showing the influence of the amount of Mg added in the brazing material.
  • FIG. 6 is a diagram showing the influence of the amount of Si added in the brazing material.
  • FIG. 7 is a diagram showing the influence of the impurity content in the brazing material.
  • FIG. 8 is a diagram showing the influence of the thickness of the brazing material.
  • FIG. 9 is a diagram illustrating the influence of the applied pressure during brazing.
  • FIG. 10 is a diagram showing the influence of the oxide film thickness on the surface of the Al alloy material to be brazed.
  • FIG. 11 is a diagram showing the influence of the oxygen concentration in the brazing atmosphere.
  • the brazing material is inserted between the surfaces of the aluminum alloy members to be joined and brazing heating is performed, so void defects are likely to occur at the joint, and flux is contained when using flux. It becomes an easy structure. For this reason, the quality of brazed products tends to vary.
  • the clad material of 3 layers or 5 layers is used as a brazing sheet, it is expensive. Therefore, the inventors of the present invention have reached the present invention in the process of earnestly studying a surface brazing method that is lower in cost and stable in quality than the prior art. Details will be described below.
  • a brazing sheet is sandwiched between two aluminum alloy members and the brazing sheet is sufficiently dissolved in a state where the brazing sheet is in contact with the brazing material. It is a method of wet brazing and brazing.
  • one aluminum alloy member may be an aluminum alloy plate, or both may be aluminum alloy plates.
  • an engaging portion may be provided so that parts made of aluminum alloy can be connected to each other, and a portion where the brazing sheet is sandwiched may be provided in the engaging portion.
  • the material to be joined is not limited to the aluminum alloy plate, and may be anything made of an aluminum alloy having a smooth surface that can be brazed at least partially.
  • the brazing filler metal is sufficiently dissolved in a state in which the brazing filler metal surface of the two-layer brazing sheet made of the brazing filler metal and the skin material is in surface contact with the aluminum alloy member.
  • the surface of the skin material constituting the brazing sheet is wetted with a brazing material and brazed.
  • the aluminum alloy member may be an aluminum alloy plate.
  • the material to be joined is not limited to the aluminum alloy plate, and may be anything made of an aluminum alloy having a smooth surface that can be brazed at least partially.
  • the aluminum alloy member to which the surface brazing method of the present invention is applied is made of an aluminum alloy having a solidus temperature of 570 ° C. or higher.
  • a brazing temperature of 570 ° C. or higher is required to sufficiently dissolve the brazing material, and as an aluminum alloy member to be joined, It is necessary to apply to those whose solidus temperature is 570 ° C. or higher. If the solidus temperature of the aluminum alloy member to be joined is less than 570 ° C., at least a part of the aluminum alloy member may be melted during surface brazing heating. A more preferable solidus temperature of the aluminum alloy member is 575 ° C. or higher. A more preferable solidus temperature of the aluminum alloy member is 580 ° C. or higher.
  • a skin material when a skin material is used in the second invention, it is necessary to use a skin material made of an aluminum alloy having a solidus temperature of 570 ° C. or higher.
  • the brazing filler metal surface of the two-layer brazing sheet composed of the brazing filler metal and the skin material is in surface contact with the aluminum alloy member, the brazing filler metal is sufficiently dissolved so that the interface between the aluminum alloy member and the skin material is brazed. Therefore, a brazing temperature of 570 ° C. or higher is required to sufficiently dissolve the brazing material.
  • the solidus temperature of the skin material constituting the two-layer brazing sheet needs to be 570 ° C. or higher.
  • the brazing sheet is composed of a single layer of brazing material having a predetermined thickness and composition, or has two layers of brazing material and skin material in order to reduce costs. Is in the point of using. First, the brazing material will be described.
  • Si As a brazing material, Si: 3 to 12% by mass, Mg: 0.1 to 5.0% by mass, the balance is an alloy having a component composition composed of Al and inevitable impurities, and has a thickness of 15 to 200 ⁇ m An aluminum alloy thin plate is used.
  • Si: 3 to 12% by mass Si is an element for lowering the temperature of the liquidus line of the brazing sheet depending on its content and improving wettability during surface brazing. When the Si content is less than 3% by mass, the temperature of the liquidus line of the brazing sheet becomes too high, and even if the brazing sheet reaches a predetermined brazing temperature, the brazing sheet is not sufficiently dissolved, and sufficient brazing is performed. Strength (shear stress) may not be obtained.
  • the Si content in the brazing filler metal is in the range of 3 to 12% by mass.
  • a more preferable Si content is in the range of 4 to 12% by mass.
  • a more preferable Si content is in the range of 5 to 12% by mass.
  • Mg 0.1 to 5.0% by mass Since Mg acts as a reducing agent when oxidized itself, Mg suppresses oxidation of aluminum at the interface between the aluminum alloy plate and the brazing material of the brazing sheet due to brazing heating, and improves wettability during surface brazing. It is considered to be an element for improvement. If the Mg content is less than 0.1% by mass, depending on the brazing temperature and holding time, the effect is insufficient and sufficient brazing strength (shear stress) may not be obtained. . When the Mg content exceeds 5.0% by mass, the load on the roll when hot rolling the ingot is increased, and ear cracks also occur, so that hot rolling becomes difficult.
  • the Mg content in the brazing filler metal is in the range of 0.1 to 5.0% by mass.
  • a more preferable Mg content is in the range of 0.2 to 4.0% by mass.
  • a more preferable Mg content is in the range of 0.3 to 3.0% by mass.
  • Remainder Al and inevitable impurities
  • inevitable impurities include Fe, Cu, Mn, Zn, etc. These elements include Fe: less than 1.0 mass%, Cu: less than 1.0 mass%, Mn: If it is the range of less than 1.0 mass% and Zn: less than 1.0 mass%, the effect of this invention is not prevented. Therefore, the content of the components as inevitable impurities is preferably less than 1.0% by mass.
  • Cr, Ni, Zr, Ti, V, B, Sr, Sb, Ca, Na, and the like can be considered, but Cr: less than 0.5 mass%, Ni: less than 0.5 mass% Zr: less than 0.2% by mass; Ti: less than 0.2% by mass; V: less than 0.1% by mass; B: less than 0.05% by mass; Sr: less than 0.05% by mass; If it is in the range of less than 05% by mass, Ca: less than 0.05% by mass, and Na: less than 0.01% by mass, the performance characteristics of the brazing sheet according to the present invention will not be significantly impaired. May be included.
  • the thickness of the brazing material constituting the brazing sheet 15 to 200 ⁇ m
  • the thickness of the brazing material constituting the single-layer brazing sheet according to the first invention may be any thickness that can achieve sound surface brazing. If the thickness is less than 15 ⁇ m, sufficient brazing strength may not be obtained. When the thickness exceeds 200 ⁇ m, the amount of the brazing material that oozes out from the joint surface becomes too large, resulting in an increase in cost. Accordingly, the thickness range of the brazing material is 15 to 200 ⁇ m.
  • a more preferable thickness range is 15 to 150 ⁇ m.
  • a more preferable thickness range is 20 to 100 ⁇ m.
  • Manufacturing method of single layer type brazing sheet made of brazing material For example, a single layer type brazing sheet made of 100 ⁇ m thick brazing material is manufactured as follows. Ingots, scraps, and the like as raw materials are blended and put into a melting furnace to melt a molten aluminum having a predetermined brazing material composition.
  • the melting furnace is generally a burner furnace in which the raw material is heated and melted directly by a burner flame. After the molten aluminum reaches a predetermined temperature, for example, 800 ° C., an appropriate amount of the flux for removing the debris is added, and the molten metal is stirred with a stirring rod to dissolve all raw materials.
  • an additional raw material such as Mg
  • an additional raw material such as Mg
  • the metal soot floating on the surface is removed.
  • the molten aluminum is cooled to a predetermined temperature, for example, 740 ° C.
  • the molten aluminum is poured out from the hot water outlet into a bowl, and if necessary, casting is started through an inline rotary degasser, a CFF filter, and the like.
  • a melting furnace and a holding furnace are provided side by side, after the molten metal melted in the melting furnace is transferred to the holding furnace, casting is started after further sedation or the like in the holding furnace.
  • the jacket of the DC casting machine may be a single pour, but may be a multi-pour that places importance on production efficiency. For example, while pouring through a dip tube and float into a water-cooled mold of 700 mm ⁇ 450 mm size, the lower mold is lowered at a casting speed of 60 mm / min, and direct water cooling (Direct) is performed on the solidified shell layer at the bottom of the water-cooled mold. While performing (Chill), the molten metal in the sump is solidified and cooled to obtain a slab having a predetermined size, for example, 700 mm ⁇ 450 mm ⁇ 4500 mm. After the end of casting, the front and rear ends of the slab are cut and double-sided with 25mm on one side.
  • Direct direct water cooling
  • the 400mm-thick slab is inserted into a soaking furnace and homogenized at 450-540 ° C for 1-12 hours ( HO treatment). After the homogenization treatment, the slab is taken out from the soaking furnace, subjected to several passes of hot rolling by a hot rolling mill, and, for example, cut in a state of 40 mm thickness to obtain a 40 mm thick hot rolled plate ( Flat plate) One sheet of 700 mm ⁇ 40 mm ⁇ 4000 mm is secured. Thereafter, most of the remaining hot-rolled sheets are subsequently hot-rolled in several passes by a hot rolling mill to obtain, for example, a 6 mm-thick hot-rolled sheet coil (Reroll).
  • the 6 mm thick hot rolled plate coil is subjected to several passes of cold rolling to obtain a single layer brazing sheet made of a brazing material having a predetermined thickness, for example, 100 ⁇ m.
  • a brazing material having a predetermined thickness, for example, 100 ⁇ m.
  • the coil is inserted into an annealer and subjected to an intermediate annealing treatment at a holding temperature of 300 to 450 ° C. It is desirable to soften the plate.
  • the skin material in the two-layer brazing sheet according to the second invention may be an aluminum alloy having a solidus temperature of 570 ° C.
  • the thickness of the skin material is preferably 100 ⁇ m or more.
  • a more preferable thickness of the skin material is 150 ⁇ m or more.
  • a more preferable thickness of the skin material is 200 ⁇ m or more.
  • the thickness of the skin material is larger than the thickness of the brazing material.
  • the brazing material type is AA4045 alloy and the thickness is 60 ⁇ m
  • a two-layer brazing sheet in which the skin material type is AA1100 alloy and the thickness is 500 ⁇ m may be used. 2.
  • a two-layer brazing sheet comprising a brazing material and a skin material
  • a two-layer brazing sheet comprising a brazing material having a thickness of 40 ⁇ m and a skin material having a thickness of 400 ⁇ m is produced as follows.
  • a slab of 700 mm ⁇ 450 mm ⁇ 4500 mm having a predetermined skin material composition is obtained by DC casting.
  • the slab after chamfering having a thickness of 400 mm made of the above-mentioned skin material composition and 40 mm made of the brazing material composition secured as described above.
  • a thick hot-rolled plate (flat plate) 700 mm ⁇ 40 mm ⁇ 4000 mm (one sheet) is temporarily joined in a state of being bonded on a 700 mm ⁇ 4000 mm surface.
  • This two-layer clad slab is inserted into a soaking furnace and subjected to a homogenization treatment (HO treatment) at 450 to 540 ° C. for 1 to 12 hours. After the homogenization treatment, the slab is taken out of the soaking furnace and subjected to several passes of hot rolling with a hot rolling mill to obtain, for example, a 6 mm thick hot rolled sheet coil (Reroll).
  • HO treatment homogenization treatment
  • Reroll 6 mm thick hot rolled sheet coil
  • This hot-rolled plate coil is subjected to several passes of cold rolling to form a two-layer type comprising a brazing material (thickness 40 ⁇ m) and a skin material (thickness 400 ⁇ m) having a predetermined thickness, for example, 440 ⁇ m Obtain a brazing sheet.
  • the coil is inserted into an annealer and subjected to an intermediate annealing treatment at a holding temperature of 300 to 450 ° C. It is desirable to soften the plate.
  • the second feature of the present invention is that a specific surface pressure is applied under an inert gas atmosphere in order to perform surface brazing without flux and to obtain a sufficient brazing strength (shear stress) at the joint surface. This is the point to braze.
  • a specific surface pressure is applied under an inert gas atmosphere in order to perform surface brazing without flux and to obtain a sufficient brazing strength (shear stress) at the joint surface. This is the point to braze.
  • the brazing sheet (brazing material) as described above under an inert gas atmosphere and wet the interface between the aluminum alloy members or the interface between the skin material and the aluminum alloy member. It is necessary to hold at a holding temperature of 570 ° C. or higher for a predetermined time. For this reason, even during brazing heating, it is necessary to perform brazing in an inert gas atmosphere in order to suppress oxidation of the brazing surface of the aluminum alloy member or the brazing material surface of the brazing sheet. .
  • the inert gas nitrogen gas, argon gas, helium gas, or the like can be used.
  • the oxygen concentration in the inert gas is preferably 500 ppm or less. If the oxygen concentration in the inert gas exceeds 500 ppm, the joint strength (shear stress) after surface brazing decreases. A more preferable oxygen concentration in the inert gas is 100 ppm. A more preferable oxygen concentration in the inert gas is 10 ppm or less. Specifically, for the industrial nitrogen gas, since the standard is defined as an oxygen concentration of 10 ppm or less, it is most preferable to use the industrial nitrogen gas from the viewpoint of cost.
  • the inert gas may be injected to replace the atmosphere in the heating device with the inert gas before reaching a predetermined holding temperature. Additional surface pressure: 0.6 gf / mm 2 or more
  • a brazing sheet (brazing material) having a predetermined composition is dissolved and the brazing material and the aluminum alloy member are in surface contact.
  • brazing heating is performed, and at this time, it is necessary to maintain a predetermined brazing temperature while applying a surface pressure of 0.6 gf / mm 2 or more to the joint surface.
  • a surface pressure of 0.6 gf / mm 2 or more it is possible to perform surface brazing by applying a surface pressure of 0.6 gf / mm 2 or more to the joint surface after reaching a predetermined holding temperature without applying surface pressure during brazing heating. Good.
  • the surface pressure is less than 0.6 gf / mm 2 , sufficient brazing strength (shear stress) cannot be obtained.
  • the surface pressure applied to the joint surface is high.
  • a more preferable surface pressure is 1.0 gf / mm 2 or more.
  • a more preferable surface pressure is 2.0 gf / mm 2 or more.
  • Brazing temperature condition maintained at 570 ° C. or higher
  • a brazing sheet (brazing material) having a predetermined composition is dissolved, and the interface between the aluminum alloy members or the skin material and the aluminum alloy member It is necessary that the brazing temperature be at least 570 ° C. or higher in order to wet the interface of the surface and reliably braze the surface to ensure sufficient brazing strength (shear strength).
  • the brazing temperature is less than 570 ° C.
  • the brazing material is not sufficiently dissolved, and sufficient brazing strength (shear strength) cannot be obtained.
  • the holding temperature is 575 ° C. or higher.
  • a more preferable holding temperature is 580 ° C. or higher.
  • Brazing holding time The holding time at the brazing temperature is preferably 2 minutes or more. Although depending on the brazing temperature, if the holding time is less than 2 minutes, sufficient brazing strength (shear strength) cannot be obtained due to uneven temperature at the joint surface. A more preferable holding time is 5 minutes or more.
  • the sedation was performed for 30 minutes, and the cocoon floating on the surface of the molten metal was removed with a stirring rod, and a disk sample was collected with a spoon as a mold for component analysis.
  • the crucible was sequentially taken out from the electric furnace using a jig, and molten aluminum was cast into five molds (70 mm ⁇ 70 mm ⁇ 15 mm) preheated to 200 ° C.
  • the disk sample of each sample was subjected to composition analysis by emission spectroscopic analysis. The results are shown in Table 1.
  • the ingot was chamfered by 3 mm after cutting the hot water to a thickness of 9 mm.
  • the ingot is charged into an electric heating furnace, heated to 480 ° C.
  • Hot rolling was applied. Thereafter, the hot-rolled plate was cold-rolled to obtain a cold-rolled plate having a thickness of 1.2 mm, and subjected to primary intermediate annealing at 390 ° C. for 2 hours in order to soften. Further, it was cold-rolled to form a cold rolled sheet having a thickness of 0.3 mm, and subjected to secondary intermediate annealing at 390 ° C. ⁇ 2 hours for softening. Further, cold rolling was performed to obtain a final cold rolled plate of 0.06 mm (60 ⁇ m).
  • the block B was erected at the center on the 35 mm ⁇ 35 mm surface of the block A so that the 15 mm ⁇ 8 mm surface of the block B (18 mm ⁇ 15 mm ⁇ 8 mm) of the block A was overlaid on the brazing sheet. Further, a weight of a predetermined mass for pressurization was placed on the upper surface of the block B, and the assembled block or the like was inserted into a test furnace covered with a quartz tube ( ⁇ 125 ⁇ 330 mm) as shown in FIG.
  • thermocouple attached to block A shows a predetermined brazing temperature while flowing industrial nitrogen gas (nitrogen with an oxygen concentration of 10 ppm or less) at a flow rate of 10 Nl / min to replace the atmosphere with inert gas
  • industrial nitrogen gas nitrogen with an oxygen concentration of 10 ppm or less
  • the output to the resistance wire was turned off and the assembled block or the like was cooled in the furnace.
  • the thermocouple attached to block A showed 400 ° C. or lower, the assembled block and the like were taken out of the furnace and cooled to room temperature.
  • the block A is preliminarily subjected to heat treatment at 600 ° C.
  • the oxide film thickness was 30 nm for the bonded material subjected to the heat treatment for 1 hour and the oxide film thickness was 90 nm for the bonded material subjected to the heat treatment at 600 ° C. for 5 hours.
  • Measurement of Shear Stress The inverted T-shaped test piece prepared as described above is fixed to a jig as shown in FIG. 3 and pressed from the end face (35 mm ⁇ 10 mm face) of the block A with an Amsler (strain rate: 1 mm). / Min), brazing strength (breaking shear stress) on the brazed surface was measured. The results are shown in Tables 2 to 9 and FIGS.
  • a D alloy brazing material (brazing material thickness: 60 ⁇ m) and a to-be-joined material (untreated material) are used, and industrial nitrogen ( A reverse T-shaped test piece was prepared by brazing under a condition of brazing temperature 605 ° C., holding time 10 minutes, and applied pressure 5.6 gf / mm 2 while flowing nitrogen (oxygen concentration of 10 ppm or less). It is.
  • the brazing temperature is preferably 580 ° C. or higher. It can also be seen that the brazing temperature holding time is preferably 2 minutes or longer, particularly 5 minutes or longer.
  • the preferable content of Mg is 0.5 to 3.0% by mass.
  • Si content sufficient shear stress is obtained for all the samples included in the range of 3.0 to 12.0% by mass, but some shear is obtained when the Si content is 3.0% by mass. The stress is low.
  • the preferable content of Si is 5.0 to 12.0% by mass.
  • Cu, Mn, and Zn which are unavoidable impurities, if it contains less than 1.0 mass%, it turns out that shear stress is hardly influenced.
  • the thickness of the brazing material if the thickness is 15 ⁇ m or more, sufficient shear stress is obtained for the time being, but when the thickness is 15 ⁇ m, the obtained shear stress is slightly low. Therefore, the thickness of the brazing material is preferably 20 ⁇ m or more. If it is too thick, the brazing filler metal becomes excessive, so that the upper limit is 200 ⁇ m as described above.
  • the applied pressure at the time of brazing if brazing is performed while applying a surface pressure of 0.6 gf / mm 2 or more, a sufficient shear stress is obtained for the time being.
  • a surface pressure of 1.0 gf / mm 2 or more in order to increase the shear stress.
  • the oxide film formed on the surface of the aluminum alloy member to be brazed exceeds 30 nm, the resulting shear stress is rapidly reduced. Therefore, the aluminum alloy member to be brazed should have an oxide film formed on the surface of less than 30 nm.
  • the atmosphere should be at least inert such as nitrogen. In particular, it can be seen that an inert gas atmosphere having an oxygen content of 500 ppm or less is preferable.

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JP5337326B1 (ja) * 2011-12-02 2013-11-06 古河スカイ株式会社 アルミニウム合金材、ならびに、アルミニウム合金構造体及びその製造方法
JP5345264B1 (ja) * 2012-01-27 2013-11-20 古河スカイ株式会社 熱交換器フィン用のアルミニウム合金材及びその製造方法、ならびに、当該アルミニウム合金材を用いた熱交換器
US20140117001A1 (en) * 2010-02-10 2014-05-01 Illinois Tool Works Inc. Aluminum alloy welding wire
US20140190952A1 (en) * 2010-02-10 2014-07-10 Illinois Tool Works Inc. Aluminum alloy welding wire
WO2017093627A1 (fr) * 2015-12-01 2017-06-08 Constellium Neuf-Brisach Tole mince a haute rigidite pour carrosserie automobile
US10421159B2 (en) 2015-02-25 2019-09-24 Hobart Brothers Llc Systems and methods for additive manufacturing using aluminum metal-cored wire
US10654135B2 (en) 2010-02-10 2020-05-19 Illinois Tool Works Inc. Aluminum alloy welding wire
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JP5906994B2 (ja) * 2012-08-22 2016-04-20 日本軽金属株式会社 アルミニウム合金部材の面ろう付け方法
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CN105234572A (zh) * 2015-11-03 2016-01-13 苏州新一磁业有限公司 一种金属logo的制作和组装方法
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CN106319299A (zh) * 2016-08-31 2017-01-11 中信戴卡股份有限公司 一种新型铝合金及其制备方法
WO2018154939A1 (ja) * 2017-02-22 2018-08-30 日本軽金属株式会社 接合方法
KR102212051B1 (ko) 2019-12-02 2021-02-04 주식회사 홍산 선박용 레디얼 타입 유압모터의 콘넥팅로드 마찰면 자동 브레이징장치

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US9770788B2 (en) * 2010-02-10 2017-09-26 Hobart Brothers Company Aluminum alloy welding wire
US9770787B2 (en) * 2010-02-10 2017-09-26 Hobart Brother Company Aluminum alloy welding wire
US11890703B2 (en) 2010-02-10 2024-02-06 Illinois Tool Works Inc. Aluminum alloy welding wire
US20140117001A1 (en) * 2010-02-10 2014-05-01 Illinois Tool Works Inc. Aluminum alloy welding wire
US20140190952A1 (en) * 2010-02-10 2014-07-10 Illinois Tool Works Inc. Aluminum alloy welding wire
US10654135B2 (en) 2010-02-10 2020-05-19 Illinois Tool Works Inc. Aluminum alloy welding wire
US11097380B2 (en) 2010-02-10 2021-08-24 Hobart Brothers Llc Aluminum alloy welding wire
JP5337326B1 (ja) * 2011-12-02 2013-11-06 古河スカイ株式会社 アルミニウム合金材、ならびに、アルミニウム合金構造体及びその製造方法
JP2013249540A (ja) * 2011-12-02 2013-12-12 Uacj Corp アルミニウム合金材、ならびに、アルミニウム合金構造体及びその製造方法
JP5345264B1 (ja) * 2012-01-27 2013-11-20 古河スカイ株式会社 熱交換器フィン用のアルミニウム合金材及びその製造方法、ならびに、当該アルミニウム合金材を用いた熱交換器
US10421159B2 (en) 2015-02-25 2019-09-24 Hobart Brothers Llc Systems and methods for additive manufacturing using aluminum metal-cored wire
US11370068B2 (en) 2015-02-25 2022-06-28 Hobart Brothers Llc Systems and methods for additive manufacturing using aluminum metal-cored wire
WO2017093627A1 (fr) * 2015-12-01 2017-06-08 Constellium Neuf-Brisach Tole mince a haute rigidite pour carrosserie automobile
US11459641B2 (en) 2015-12-01 2022-10-04 Constellium Neuf-Brisach Highly rigid sheet for car body

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KR20130058055A (ko) 2013-06-03
CN103068512A (zh) 2013-04-24
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TWI504460B (zh) 2015-10-21

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