WO2013077455A2 - アルミニウム部材の接合方法及び当該接合方法によって接合されたアルミニウム構造体 - Google Patents

アルミニウム部材の接合方法及び当該接合方法によって接合されたアルミニウム構造体 Download PDF

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WO2013077455A2
WO2013077455A2 PCT/JP2012/080650 JP2012080650W WO2013077455A2 WO 2013077455 A2 WO2013077455 A2 WO 2013077455A2 JP 2012080650 W JP2012080650 W JP 2012080650W WO 2013077455 A2 WO2013077455 A2 WO 2013077455A2
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Prior art keywords
joining
aluminum
members
aluminum member
joint
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PCT/JP2012/080650
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English (en)
French (fr)
Japanese (ja)
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WO2013077455A3 (ja
Inventor
細川俊之
枝義弥
諸井努
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古河スカイ株式会社
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Priority to CN201280058299.5A priority Critical patent/CN103958111B/zh
Priority to JP2013545987A priority patent/JP6023074B2/ja
Publication of WO2013077455A2 publication Critical patent/WO2013077455A2/ja
Publication of WO2013077455A3 publication Critical patent/WO2013077455A3/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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/22—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded
    • B23K20/233—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer
    • B23K20/2336—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating taking account of the properties of the materials to be welded without ferrous layer both layers being aluminium
    • 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
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/02—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating by means of a press ; Diffusion bonding
    • B23K20/023—Thermo-compression bonding
    • 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
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/18—Sheet panels
    • 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 for joining aluminum members together and an aluminum structure joined by the joining method.
  • Non-Patent Document 1 metal joining methods are roughly classified into material joining methods, chemical joining methods, and mechanical joining methods. Any of these methods is used for joining aluminum members, and specifically, material joining methods such as a welding method, a soldering method, and a brazing method have been used.
  • the joint is heated by electricity or flame to be melted and alloyed to form a joint.
  • the filler material is simultaneously melted at the time of joining to fill the gap.
  • a junction part melts, reliable joining is made.
  • the joint portion is melted and joined, the shape in the vicinity of the joint portion is greatly deformed, and the metal structure is also greatly changed locally to become another structure, which may cause local weakening.
  • it is necessary to locally heat only the joint portion there is a problem that it is difficult to join multiple points at the same time. There existed problems, such as an unjoined part remaining and a residual stress producing, and the weight increase by adding a filler material.
  • the brazing method has a problem that the shape changes due to the flow of the brazing material. Even when a brazing material is used in addition to the member to be joined, or when the brazing material is clad and integrated with the joining material, a certain amount of brazing material is required. Even if it exists, there was a problem of filling the gap. Further, when a brazing material is prepared separately, the assembly is troublesome, and the clad material has a problem that the material cost becomes high.
  • the seepage bonding shown in Patent Document 1 is a highly reliable new bonding method with good bonding properties and almost no deformation due to the flow of materials during bonding. Since the member to be joined itself does not flow greatly due to melting and does not use a solder material, a brazing material, a solubilizing material, or the like, there is a feature that a dimensional change due to joining is small and hardly changes in shape. In particular, even in joining members having fine flow paths, good joining can be performed without clogging the flow paths due to inflow or deformation of the liquid phase.
  • the bonding is not limited to a flat plate shape, and bonding in which the end portions of the members are abutted is also possible. Since the materials themselves can be joined, the assembly is not complicated as in brazing using a brazing material, and the material cost is not as high as that of a clad material of brazing material.
  • the seepage joining is a joining method that solves the problems of the conventional joining methods, and has many advantages in joining aluminum materials.
  • Aluminum materials are highly demanded as structures because of their high specific strength, and if there is a lightweight and high-strength structure, a large industrial effect can be obtained.
  • squeeze-out joining is used in a joint shape such as a structure, stress concentration tends to occur at a portion where the end portions of the members are butted together.
  • the present invention has been made in view of such technical background.
  • An object of the present invention is to provide a method for joining aluminum members.
  • the present invention is a method for joining a first aluminum member and a second aluminum member, wherein at least one of the first and second aluminum members is generated in the aluminum member with respect to its total mass.
  • the joining width of the joining portion of the first and second aluminum members is smaller than the minimum width of the cross section along the plane parallel to the joining surfaces of the first and second aluminum members of the second aluminum alloy member.
  • the joining surfaces of the first and second aluminum members may each be a single plane.
  • the joining surfaces of the first and second aluminum members may each be composed of a plurality of complementary flat surfaces or complementary curved surfaces between the two members.
  • the joint surfaces of the first and second aluminum members are each composed of a plurality of planes complementary between the two members, the joint surfaces are formed from two planes or three planes complementary between the two members.
  • the cross section of the joint perpendicular to the joint surface may be substantially L-shaped or substantially U-shaped.
  • the joint surfaces of the first and second aluminum members are each composed of a plurality of planes complementary between the two members
  • the joint surfaces are composed of a plurality of continuous planes complementary between the two members
  • the cross section of the joint perpendicular to the joint surface may be serrated, stepped, or uneven.
  • the joint surfaces of the first and second aluminum members may be complementary curved surfaces between the two members, and the cross section of the joint perpendicular to the joint surface may be wavy.
  • the first and second aluminum members are made of an aluminum material regulated to Mg: 0.5% by mass or less,
  • the bonding is performed in a non-oxidizing atmosphere with a fluoride-based or chloride-based flux applied to the bonding portion.
  • the first aluminum member is made of an aluminum material containing Mg: 0.2 mass% to 2.0 mass%
  • the second aluminum member is Mg: 2.0 mass%. It consists of aluminum materials regulated as follows: The bonding is performed in a vacuum, in a non-oxidizing atmosphere or in the air.
  • the present invention also provides an aluminum structure in which the first and second aluminum members are joined by the joining methods described above.
  • the joining method has the following original features of exudation joining. That is, since the member to be joined itself does not flow greatly due to melting and does not use solder material, brazing material, solution material, or the like, the dimensional change due to joining is small and almost no shape change occurs. In particular, even in joining members having fine flow paths, good joining can be performed without clogging the flow paths due to inflow or deformation of the liquid phase.
  • FIG. 3 is a schematic diagram showing a phase diagram of an Al—Si alloy as a binary eutectic alloy. It is explanatory drawing which shows the production
  • the joining method of the aluminum member of the present invention and the aluminum structure joined using this joining method will be described.
  • the aluminum members are exuded and joined by applying the joining method in accordance with the description in Patent Document 1 described above.
  • the joining form of the 1st and 2nd aluminum member which is a to-be-joined member is demonstrated.
  • the cross-sectional area gradually increases from the second aluminum member to the first aluminum member such as a brazed fillet or a weld bead. If there is no part where the cross-sectional area gradually changes, for example, when a load such as a cantilever is applied to a part away from the joint part of the second aluminum member, stress concentrates on the joint part where the cross-sectional area changes suddenly. However, when the load condition is such that the stress exceeds the bonding strength, the bonded portion is deformed or broken.
  • the end of the second aluminum member on the side in contact with the first aluminum member is enlarged so that the joint surface is the first. It was made larger than the main body portion of the aluminum member No. 2.
  • the joining width of the joining portion of the second aluminum member and the first aluminum member is set to a surface parallel to the joining surfaces of the first and second aluminum members of the main body portion of the second aluminum member. It is larger than the minimum width of the cross section along.
  • FIG. 1 As an example of such a joining form by standing contact, as shown in FIG. 1, there is a joining form of a second aluminum member having an L-shaped end and a first aluminum member. What is necessary is just to determine the dimension of L shape suitably.
  • the end of the second aluminum member spreads in a funnel shape, and the one joined to the first aluminum member at the funnel-shaped end surface is used.
  • the end of the second aluminum member spreads in a funnel shape, and the one joined to the first aluminum member at the funnel-shaped end surface is used.
  • the unjoined end of the second aluminum member in FIG. 2 opposite to the end joined to the first aluminum member spreads.
  • the shape of the unjoined end is arbitrary and does not impair the effects of the present invention.
  • the angle formed by the second aluminum member and the first aluminum member that is, the angle formed by the center lines along the longitudinal direction of both members is a right angle ( 90 degrees), but is not limited to this angle.
  • the angle ( ⁇ ) formed by the center lines (L1, L2) can be set in the range of 0 ° ⁇ ⁇ 180 °, and the effect is exhibited.
  • joining is often performed in a range of 30 ° ⁇ ⁇ 150 °.
  • first and second aluminum members have been described on the premise that they are solid members, either one or both of the first and second aluminum members may be hollow members.
  • the joining surface according to the present invention is a general joining form that is not limited to the joining form such as the above-described standing joining, and various joining surfaces are changed will be described.
  • the joining includes two members to be joined, and the joining surfaces are often composed of a single plane.
  • the amount of liquid layer is smaller than that of normal brazing, and a filler metal is not used unlike welding. Therefore, when a member having high strength is selected as the member to be bonded, the bonding strength of the bonded portion is relatively weak. In such a case, if a load is applied, the joint will be deformed or broken.
  • the joining surface of the first aluminum member is a plurality of planes
  • the joining surface of the second aluminum member is also the same plurality of planes.
  • the plurality of joining surfaces of the first aluminum member and the plurality of joining surfaces of the second aluminum member corresponding thereto are respectively complementary.
  • the joining surfaces of the first and second aluminum members are curved surfaces, and the curved surfaces are complementary.
  • FIG. 5 there may be mentioned one in which a section of a joining portion orthogonal to a plurality of planes has a vertical step shape.
  • the dimensions of the step shape may be determined as appropriate, and the corners may be curved (R).
  • FIG. 6 what has the cross section of the junction part in the step shape of an obtuse angle is mentioned. Similar to the example of FIG. 5, the dimensions of the step shape may be determined as appropriate, and the corners may be curved (R).
  • FIG. 7 there is one in which the cross section of the joint portion has a square shape. What is necessary is just to determine the angle between the straight lines of a square shape suitably.
  • FIG. 8 the thing where the junction part cross section is curvilinear is mentioned. What is necessary is just to determine the specific shape and dimension of a curve suitably.
  • the joining area can be increased.
  • the bonding strength of the entire bonded structure is increased, and even when a load is applied, it is difficult to break at the bonded portion.
  • the joint surface is variously changed.
  • the two joining planes of the first aluminum member and the corresponding two joining planes of the second aluminum member are complementary to each other, and the cross section of the joining portion has a right angle or an obtuse angle. It is a substantially L-shape formed.
  • the second aluminum member has a substantially right-angled corner formed of two planes, and the first aluminum member has a bottom surface and side surfaces complementary to these two planes.
  • the 1st aluminum member is standingly joined so that it may lean against the corner
  • the end portion of the first aluminum member that is not joined may be formed into an L shape or a U shape, for example, or may not be formed into a specific shape.
  • a second aluminum member having a substantially right-angled corner formed by two flat surfaces on one side of the convex portion provided on the long side portion is used. May be.
  • the first aluminum member has a bottom surface and side surfaces complementary to the two planes of the second aluminum member.
  • the first aluminum member is joined in a standing manner so as to lean against the corner portion of the second aluminum member, and the cross section of the joined portion becomes L-shaped.
  • the end portion of the first aluminum member that is not joined may be formed in an L shape or a U shape, for example, or may not be formed in a specific shape. .
  • the end portion of the first aluminum member is stepped to form a substantially right-angled corner portion composed of two planes.
  • the second aluminum member has a flat plate shape and has a bottom surface and side surfaces complementary to the two planes of the first aluminum member. And by joining so that the edge part of a 2nd aluminum member may be faced
  • the end portion of the second aluminum member that is not joined may be formed into, for example, an L shape or a U shape, or may not be formed into a specific shape.
  • the L-shaped dimension may be determined as appropriate.
  • the same effect can be obtained if the cross section of the joint is L-shaped.
  • the joint surface is variously changed.
  • the three joining planes of the first aluminum member and the corresponding three joining planes of the second aluminum member are complementary to each other, and the cross section of the joining portion has a right angle or an obtuse angle. It is an approximately U-shape.
  • the second aluminum member has a U-shaped concave portion having a right angle or an obtuse angle at the long side portion, and the first aluminum member is complementary to the plane of the concave portion. For example, it has an end formed on an L-shaped surface. Then, by inserting and joining the L-shaped end portion of the first aluminum member into the concave portion of the second aluminum member, the cross section of the joint portion becomes a U-shape.
  • the end portion of the first aluminum member that is not joined may be formed in an L shape or a U shape, for example, or may not be formed in a specific shape.
  • the cross section of the joint portion is U-shaped, as shown in FIG. 13, two convex portions (13 ⁇ 1, 13-2), and a concave portion is formed between the convex portions.
  • the first aluminum member has an end portion having a bottom surface and both side surfaces complementary to the plane of the recess. Then, by inserting the end portion of the first aluminum member into the concave portion of the second aluminum member and joining, the cross section of the joint portion becomes a U-shape.
  • the end portion of the first aluminum member that is not joined may be formed in an L shape or a U shape, for example, or may not be formed in a specific shape.
  • the U-shaped dimensions may be appropriately determined.
  • the same effect can be obtained as long as the cross-section of the joint is U-shaped.
  • the joining surfaces of the first aluminum member and the second aluminum member are each composed of a plurality of stepped planes, and the corresponding planes between these members are complementary to each other. It is what. Accordingly, the cross section of the joint becomes a stepped shape by the joining.
  • the joining surfaces of the first aluminum member and the second aluminum member are each composed of a plurality of serrated planes, and the corresponding planes between these members are complementary. Is. Accordingly, the cross section of the joint becomes serrated by joining.
  • the joining surfaces of the first aluminum member and the second aluminum member are each composed of a plurality of concave and convex surfaces, and the corresponding concaves and convexes between these members are complementary. It is what. Therefore, the cross section of the joint becomes uneven due to the joining.
  • the joining surfaces of the first aluminum member and the second aluminum member are each formed of a wavy curved surface, and the corresponding wavy curved surfaces are complementary to each other. Accordingly, the cross section of the bonded portion becomes wavy due to the bonding.
  • the joining width of the joining portion of the first aluminum member and the second aluminum member is set to be the second aluminum parallel to the joining surfaces of the first and second aluminum members. It is set larger than the minimum width of the main body section of the member.
  • the joining form of the 1st and 2nd aluminum member was explained in full detail, in any joining form, the thing whose aluminum member itself intensity
  • a first aluminum member that is one joined member and a second aluminum member that is the other joined member are joined.
  • the aluminum member means an aluminum alloy material or a pure aluminum material, and the aluminum members may be joined together with the same alloy composition or with different alloy compositions.
  • liquid phase ratio the ratio of the mass of the liquid phase generated in the aluminum member with respect to the total mass of the aluminum member. It is necessary to join at a temperature. If the liquid phase ratio exceeds 35%, the amount of the liquid phase to be generated is too large, and the aluminum member cannot maintain its shape and is greatly deformed. On the other hand, if the liquid phase ratio is less than 5%, joining becomes difficult.
  • a preferable liquid phase ratio is 5 to 30%, and a more preferable liquid phase ratio is 10 to 20%.
  • the liquid phase ratio defined in the present invention is obtained by equilibrium calculation. Specifically, the temperature is calculated from the alloy composition and the highest temperature achieved during heating by thermodynamic equilibrium calculation software such as Thermo-Calc.
  • FIG. 18 schematically shows a phase diagram of an Al—Si alloy which is a typical binary eutectic alloy.
  • generation of a liquid phase starts at a temperature T1 near the eutectic temperature (solidus temperature) Te.
  • T1 near the eutectic temperature (solidus temperature) Te.
  • solidus temperature Te solidus temperature
  • crystal precipitates are distributed in the matrix divided by the crystal grain boundaries.
  • FIG. 19B the crystal grain boundary with a large segregation of the crystal precipitate distribution melts to become a liquid phase.
  • the periphery of the Si crystal precipitate particles and the intermetallic compound, which are the main additive element components dispersed in the matrix of the aluminum alloy, is melted into a spherical shape to form a liquid phase.
  • the spherical liquid phase generated in the matrix is re-dissolved in the matrix with the passage of time and temperature due to the interfacial energy, and the grain boundary and the surface are diffused by diffusion in the solid phase. Move to. Next, when the temperature rises to T2 as shown in FIG. 17, the liquid phase amount increases from the state diagram. As shown in FIG.
  • the seepage joining applied by the present invention utilizes a liquid phase generated by partial melting inside the aluminum member, and can realize both joining and shape maintenance.
  • the aluminum member B is an alloy that does not generate a liquid phase, as shown in FIG. 22 (a)
  • the aluminum member B is joined as a structure in which the structure of the aluminum member A enters the aluminum member B near the joining interface. The Therefore, a metal structure other than the aluminum member A and the aluminum member B does not occur at the bonding interface.
  • the aluminum member B is also an alloy that generates a liquid phase, as shown in FIG. 22B, the two members have a completely integrated structure, and the bonding interface cannot be determined.
  • E-1 Fracture of oxide film by flux
  • flux is applied to at least the joint portion in order to destroy the oxide film.
  • a fluoride flux such as KAlF4 or CsAlF4 used for brazing an aluminum material or a chloride flux such as KCl or NaCl is used. These fluxes melt before the liquid phase melts or reaches the joining temperature in the seepage joining, and react with the oxide film to destroy the oxide film.
  • bonding is performed in a non-oxidizing atmosphere such as nitrogen gas or argon gas.
  • a fluoride-based flux is used, bonding is preferably performed in a non-oxidizing gas atmosphere in which the oxygen concentration is suppressed to 250 ppm or less and the dew point is suppressed to ⁇ 25 ° C. or less.
  • both the first and second aluminum members are regulated to have an Mg content of 0.5 mass% (hereinafter simply referred to as “%”) or less. It shall consist of aluminum material.
  • Mg: 0.5 mass% or less includes the case where Mg is not contained or the case where it is contained in a very small amount as an inevitable impurity level.
  • the Mg content satisfies the condition of 0.5% by mass or less, there is no limitation on the type and content of other elements contained in the first and second aluminum members.
  • bonding is performed in a vacuum or the above non-oxidizing atmosphere in order to suppress the formation of the oxide film.
  • bonding may be possible in a dry atmosphere.
  • bonding in a non-oxidizing atmosphere or a dry atmosphere it is preferable to suppress the dew point to ⁇ 25 ° C. or lower.
  • one of the first and second aluminum members is made of an aluminum material having an Mg content of 0.2% to 2.0%.
  • Mg content is less than 0.2% by mass, a sufficient getter action cannot be obtained and good bonding cannot be achieved.
  • Mg reacts with oxygen in the atmosphere on the surface, and a large amount of oxide MgO is generated and bonding is inhibited.
  • the reason why the Mg content is set to 0.2% or more and 2.0% or less for only one aluminum member is that it is sufficient if the getter action of Mg by one aluminum member is obtained.
  • the Mg content is not limited to 0.2% or more, but bonding is inhibited when a large amount of MgO is generated, so the Mg content is regulated to 2.0% or less.
  • Mg: 2.0% or less includes the case where Mg is not contained, or the case where a very small amount is contained as an inevitable impurity level.
  • the type and content of the other elements are not limited, and the other aluminum member contains Mg. There is no limitation on the type and content of other elements as long as the condition of 2.0% or less is satisfied.
  • the time during which the liquid phase ratio is 5% or more and 35% or less is preferably 30 seconds or more and 3600 seconds or less, and more preferably 60 seconds or more and 1800 seconds or less. If it is less than 30 seconds, the liquid phase may not be sufficiently filled in the joint, and if it exceeds 3600 seconds, the shape change of the member to be joined may not be reliably suppressed.
  • the difference between the solidus temperature and the liquidus temperature of the aluminum member that generates the liquid phase is preferably 10 ° C. or more. If it is less than 10 degreeC, the temperature range in which a solid and a liquid coexist will become narrow, and control of the amount of generated liquid phases may become difficult.
  • the crystal grain size of the matrix after heating at the bonding temperature is 50 ⁇ m or more. If the thickness is less than 50 ⁇ m, grain boundary slip is likely to occur due to its own weight, and deformation may be promoted when the joining time is increased.
  • the crystal grain size was measured by a cutting method based on JIS H: 501.
  • the Mg content is regulated to 0.5% or less or 0.2% to 2.0%, and Si: 6 to 3.5% is contained as an essential element, Cu: 0.05 to 0.5%, Fe: 0.05 to 1.0%, Zn: 0.2 to 1.0%, Mn: 0.3%.
  • One or more selected from 1 to 1.8% and Ti: 0.01 to 150.3% are further contained as selective additive elements, and the balance is made of an aluminum alloy composed of Al and inevitable impurities.
  • An aluminum alloy material is preferably used.
  • the Si content is X (%)
  • the joining temperature T is 660. It is preferable to control such that ⁇ 39.5X ⁇ T ⁇ 660 ⁇ 15.7X and T ⁇ 577. This achieves even better bonding.
  • the Mg content is regulated to 0.5% or less or 0.2% to 2.0%, and Cu: 0.7 to 15.0%
  • Si 0.05 to 0.8%
  • Fe 0.05 to 1.0%
  • Zn 0.2 to 1.0%
  • Mn 0.1 to 1.8%
  • Ti One or more elements selected from 0.01 to 0.3% are further added as selective additive elements, and an aluminum alloy material made of an aluminum alloy consisting of Al and inevitable impurities is also preferably used. It is done.
  • the Cu content is Y (%)
  • the bonding temperature T is It is preferable to control so that 660-15.6Y ⁇ T ⁇ 660-6.9Y and T ⁇ 548. This achieves even better bonding.
  • the maximum stress (maximum stress) among the stresses generated in each part of the aluminum member that generates a liquid phase at the time of joining is P (kPa), and the liquid phase ratio in the aluminum alloy that is the aluminum member is V
  • P ⁇ 460-12V is satisfied.
  • the value shown on the right side of this equation is the critical stress. If a stress exceeding this value is applied to an aluminum member that generates a liquid phase, the aluminum member may be greatly deformed even if the liquid phase rate is within 35%. is there.
  • P ⁇ 460-12V is calculated for each of the aluminum members using the respective stress P and liquid phase ratio V. Join to meet at the same time.
  • the aluminum member In the joining of the present invention, since the amount of liquid phase generated in the aluminum member is very small, the aluminum member needs to be arranged so that both aluminum members are in contact with each other. However, a slight gap may be generated between the two aluminum members due to warpage or undulation of the material. In particular, undulations with an uneven wavelength of 25 to 2500 ⁇ m are not ignorable in size as gaps, and are difficult to correct with a jig press.
  • the arithmetic mean waviness Wa1 and Wa2 obtained from the unevenness of the surfaces of the two aluminum members before joining satisfy Wa1 + Wa2 ⁇ 10 ( ⁇ m)
  • further sufficient joining is obtained.
  • the arithmetic average waviness Wa1 and Wa2 are defined in JISB0633, and are obtained from waviness curves measured with a laser microscope or a confocal microscope in which a cutoff value is set so as to detect only a wavelength of 25 to 2500 ⁇ m. It is done.
  • the aluminum member is usually heated in a furnace.
  • a furnace There is no restriction
  • the continuous furnace etc. which are used for manufacture of the batch furnace of a one-chamber structure, the heat exchanger for motor vehicles, etc. can be used.
  • the atmosphere in the furnace is not limited, but is preferably performed in a non-oxidizing atmosphere as described above.
  • An oxide film is formed on the surface layer of the aluminum material, which inhibits bonding. Therefore, it is necessary to destroy the oxide film in joining.
  • the getter action of the Mg oxide film on the surface can be achieved by using a furnace in a vacuum, a non-oxidizing atmosphere or an air atmosphere without applying a flux to the joint. Can be removed.
  • the present invention provides a simple method for joining aluminum members that does not require a solution material or a brazing material. Further, there is provided an aluminum structure having no strength at the joint portion and having sufficient strength.

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PCT/JP2012/080650 2011-11-27 2012-11-27 アルミニウム部材の接合方法及び当該接合方法によって接合されたアルミニウム構造体 WO2013077455A2 (ja)

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Application Number Priority Date Filing Date Title
CN201280058299.5A CN103958111B (zh) 2011-11-27 2012-11-27 铝构件的接合方法以及通过该接合方法接合而成的铝结构体
JP2013545987A JP6023074B2 (ja) 2011-11-27 2012-11-27 アルミニウム部材の接合方法

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JP2011-258377 2011-11-27
JP2011258377 2011-11-27

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