WO2018042682A1 - Procédé de soudage à l'arc pour joindre différents matériaux, élément auxiliaire de jontoiement et joint de soudage en matériaux différents - Google Patents

Procédé de soudage à l'arc pour joindre différents matériaux, élément auxiliaire de jontoiement et joint de soudage en matériaux différents Download PDF

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Publication number
WO2018042682A1
WO2018042682A1 PCT/JP2016/079832 JP2016079832W WO2018042682A1 WO 2018042682 A1 WO2018042682 A1 WO 2018042682A1 JP 2016079832 W JP2016079832 W JP 2016079832W WO 2018042682 A1 WO2018042682 A1 WO 2018042682A1
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Prior art keywords
plate
auxiliary member
joining
hole
joining auxiliary
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PCT/JP2016/079832
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English (en)
Japanese (ja)
Inventor
励一 鈴木
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株式会社神戸製鋼所
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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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • 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
    • B23K10/00—Welding or cutting by means of a plasma
    • B23K10/02—Plasma 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
    • B23K9/00—Arc welding or cutting
    • B23K9/16—Arc welding or cutting making use of shielding gas
    • B23K9/173—Arc welding or cutting making use of shielding gas and of a consumable electrode
    • 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
    • B23K9/00—Arc welding or cutting
    • B23K9/23—Arc welding or cutting taking account of the properties of the materials to be welded

Definitions

  • the present invention relates to an arc welding method for joining dissimilar materials, a joining auxiliary member, and a dissimilar material welding joint.
  • An example of a conventional dissimilar material joining technique is a method in which through holes are provided in both a steel material and a lightweight material and restrained from above and below with bolts and nuts.
  • a means is known in which a caulking member is inserted from one side under a strong pressure and restrained by a caulking effect (see, for example, Patent Document 1).
  • the steel joint member is pushed into the aluminum alloy material as a punch, and the hole and the joint member are temporarily restrained, then overlapped with the steel material, and sandwiched with both copper electrodes from above and below, Means for resistance-welding a steel material and a joining member by momentarily applying pressure and high current have been proposed (see, for example, Patent Document 2).
  • Patent Document 1 Although the joining method described in Patent Document 1 is a relatively easy method, there is a problem that it cannot be inserted when the strength of the steel is high, and the joining strength depends on the frictional force and the rigidity of the caulking member. Therefore, there is a problem that high joint strength cannot be obtained. In addition, there is a problem that it cannot be applied to a closed cross-sectional structure because it is necessary to press down from both the front and back sides with a jig when inserting.
  • Patent Document 2 cannot be applied to a closed cross-sectional structure, and the resistance welding method has a problem that the equipment is very expensive.
  • Patent Document 3 applies pressure to the steel material surface while causing the aluminum alloy material to plastically flow in a low temperature region, while preventing both materials from melting and preventing the formation of intermetallic compounds.
  • steel and carbon fiber can be joined, because it is said that metal bond strength is obtained.
  • this joining method cannot be applied to a closed cross-sectional structure, and requires a high pressure, so that there is a problem that it is mechanically large and expensive. Also, the bonding force is not so high.
  • the existing dissimilar material joining technology has one or more problems such as (i) the member or groove shape is limited to an open cross-sectional structure, (ii) low joint strength, (iii) high equipment cost. have. For this reason, in order to spread multi-material design combining various materials, (i ′) applicable to both open and closed section structures, (ii ′) sufficiently high joint strength and reliability However, there is a need for a new technology that is easy to use and has all the elements of (iii ') low cost.
  • the present invention has been made in view of the above-mentioned problems, and its purpose is to use an aluminum alloy (hereinafter also referred to as “Al alloy”) or a magnesium alloy (hereinafter also referred to as “Mg alloy”) and a dissimilar steel material.
  • Al alloy aluminum alloy
  • Mg alloy magnesium alloy
  • Arc welding methods and joints for dissimilar materials that can be used with low-cost arc welding equipment that is already popular in the world, and can be joined with strong and reliable quality, and can be applied to both open and closed cross-section structures without restrictions. It is to provide an auxiliary member and a dissimilar material welded joint.
  • the hole of the joining auxiliary member is filled with a weld metal by any one of the following methods (a) to (e), and the second plate is inserted through the weld metal in the hole of the first plate. And welding the joining auxiliary member; Arc welding method for dissimilar materials joining.
  • B Non-gas arc welding method using the welding wire as a melting electrode.
  • C Gas tungsten arc welding method using the welding wire as a non-melting electrode filler.
  • D A plasma arc welding method using the welding wire as a non-melting electrode filler.
  • a coated arc welding method in which a coated arc welding rod from which the weld metal of an iron alloy or Ni alloy is obtained is used as a melting electrode.
  • the second plate has a bulge formed by drawing, The dissimilar material joining arc welding method according to (1), wherein, in the overlapping step, the bulging portion of the second plate is disposed in the hole of the first plate.
  • the arc welding method for joining dissimilar materials according to (1) further comprising: (4) The dissimilar material according to (1), wherein, in the arranging step, an adhesive is applied to at least one opposing surface between the joining auxiliary member and the first plate facing the joining auxiliary member. Arc welding method for joining. (5) For dissimilar material joining according to (1), an adhesive is applied to a boundary portion between the joining auxiliary member and the surface of the first plate during the arranging step or after the filling welding step. Arc welding method. (6) The long axis side length P SX of the hole portion of the auxiliary joining member is 50% or more and 100% or less with respect to the long axis side length B DX of the hole of the first plate. The arc welding method for joining different materials as described.
  • the minor axis side length PSY of the hole portion of the auxiliary joining member is 50% or more and 100% or less with respect to the minor axis side length BDY of the hole of the first plate.
  • the long axis side length P DX of the joining auxiliary member is 105% or more of the long axis side length B DX of the hole of the first plate. Welding method.
  • Thickness P H of the auxiliary bonding member wherein at first 150% or less than 50% of the thickness B H of the plate, dissimilar metals joint for arc welding method according to (1).
  • (11) In the filling welding step, surplus is formed on the surface of the joining auxiliary member, and the major axis side length W DX of the surplus is equal to the major axis side length of the hole of the joining auxiliary member. to P SX, a 105% or more, dissimilar metals joint for arc welding method according to (1).
  • the first plate includes a plurality of holes
  • the joining auxiliary member includes the plurality of holes.
  • the plurality of hole portions of the joining auxiliary member and the plurality of holes provided in the first plate are arranged coaxially and respectively in the same long axis direction;
  • the plurality of holes of the joining auxiliary member are filled with weld metal, and the second plate and the joining auxiliary member are welded via the weld metal in the hole of the upper plate. Arc welding method for joining different materials.
  • a joining auxiliary member made of steel and formed with non-circular holes having different vertical and horizontal lengths.
  • a dissimilar material welded joint comprising: a first plate made of an aluminum alloy or a magnesium alloy; and a second plate made of steel arc-welded to the first plate,
  • the first plate has non-circular holes with different vertical and horizontal lengths facing the overlapping surface with the second plate, It further comprises a steel joining auxiliary member in which non-circular holes having different vertical and horizontal lengths are formed,
  • the joining auxiliary member is disposed on the first plate so that the hole portion is coaxial with a hole provided in the first plate and the major axis directions thereof coincide with each other.
  • the hole portion of the joining auxiliary member is filled with a weld metal of an iron alloy or an Ni alloy, and is melted by the weld metal, the melted second plate, and a part of the joining auxiliary member.
  • Dissimilar material welded joint is formed.
  • (17) The overlapping surface of at least one of the first plate and the second plate is provided with an adhesive provided over the entire circumference around the hole.
  • Dissimilar material welded joint comprising an adhesive provided on at least one facing surface between the joining auxiliary member and the first plate facing the joining auxiliary member.
  • the long axis side length P SX of the hole portion of the joining auxiliary member is 50% or more and 100% or less with respect to the long axis side length B DX of the hole of the first plate.
  • the minor axis side length PSY of the hole portion of the auxiliary joining member is 50% or more and 100% or less with respect to the minor axis side length BDY of the hole of the first plate.
  • a surplus is formed on the surface of the joining auxiliary member, and the major axis side length W DX of the surplus is 105 to the major axis side length P SX of the hole of the joining auxiliary member. % Welded joint according to (15).
  • a dissimilar material of an aluminum alloy or a magnesium alloy and steel can be joined with an inexpensive arc welding equipment with a strong and reliable quality, and both an open sectional structure and a closed sectional structure can be used. Applicable without limitation.
  • FIG. 1B is a cross-sectional view of the dissimilar material welded joint taken along line Ib-Ib in FIG. 1A.
  • FIG. 1B is a cross-sectional view of the dissimilar material welded joint taken along line Ic-Ic in FIG. 1A.
  • FIG. 1 shows the welding operation
  • FIG. 7B is a cross-sectional view illustrating a state in which shear tension is applied to the dissimilar material welded joint in FIG. 7A. It is a perspective view which shows the dissimilar material welded joint of FIG. 8A. It is sectional drawing which shows the state which the up-and-down peeling tension acted on the dissimilar material welded joint of FIG. 7A. It is a perspective view which shows the dissimilar material welded joint of FIG. 9A. It is a perspective view of the dissimilar material welding joint as a comparative example which piled up and welded the aluminum upper board and steel lower board which have a hole. It is sectional drawing of the dissimilar material welded joint of FIG. 10A. FIG.
  • FIG. 10B is a cross-sectional view showing a state in which shear tension is applied to the dissimilar material welded joint in FIG. 10A. It is a perspective view which shows the state which shear tension acted on the dissimilar material welded joint of FIG. 10A, and the junction part shifted
  • FIG. 13B is a cross-sectional view taken along line XIII-XIII in FIG. 13A.
  • FIG. 1 It is a perspective view which shows the open cross-section structure by an L-shaped board and a flat plate to which the dissimilar material welded joint of this embodiment was applied, using the joining auxiliary member which has a some hole part. It is a perspective view which shows the open cross-section structure by two flat plates to which the dissimilar material welded joint of this embodiment was applied, using the joining auxiliary member which has a some hole part. It is the front view and sectional drawing which show an example of the joining auxiliary member which has a some hole part. It is the front view and sectional drawing which show the other example of the joining auxiliary member which has a some hole part. It is the front view and sectional drawing which show the further another example of the joining auxiliary member which has a some hole part.
  • the arc welding method for dissimilar material joining of the present embodiment includes an upper plate 10 (first plate) made of aluminum alloy or magnesium alloy and a lower plate 20 (second plate) made of steel, which are superposed on each other.
  • the dissimilar material welded joint 1 as shown in FIGS. 1A to 1C is obtained by joining by means of an arc welding method to be described later through a steel joining auxiliary member 30.
  • the upper plate 10 is provided with a hole 11 that penetrates in the plate thickness direction and faces the overlapping surface of the lower plate 20. As shown in FIG. 2A, the hole 11 is formed in a non-circular shape having different vertical and horizontal lengths.
  • the joining auxiliary member 30 is formed with non-circular hole portions 33 having different vertical and horizontal lengths.
  • the hole 33 of the joining auxiliary member 30 has a similar shape to the hole 11 of the upper plate 10.
  • the joining auxiliary member 30 is arranged on the upper plate 10 so that the hole 33 is coaxial with the hole 11 provided in the upper plate 10 and the long axis directions a x and b x (see FIG. 2C) coincide with each other.
  • the external shape of the joining auxiliary member 30 is not limited to the rounded rectangle as shown in FIG. 2A, and can be any shape as long as the hole 11 of the upper plate 10 is closed after welding. For example, it may be a rectangle shown in FIGS.
  • the shape of the hole 33 is not limited to a rounded rectangle as shown in FIGS. 2A and 3E, and may be an arbitrary shape. For example, it may be a rectangle shown in FIGS. 3A and 3D, an oval connecting two circles shown in FIG. 3B, or an ellipse shown in FIGS. 3C and 3F.
  • the outer diameter shape of the joining auxiliary member 30 may be similar to the shape of the hole 33 as shown in FIGS. 2A and 3A to 3C, or as shown in FIGS. 3D to 3F. It may be similar to the shape.
  • the hole 33 of the joining auxiliary member 30 is filled with a weld metal 40 of an iron alloy or Ni alloy in which a filler material (welding material) is melted by arc welding, and is melted with the weld metal 40.
  • the molten plate W is formed by the lower plate 20 and a part of the joining auxiliary member 30. Therefore, the fusion
  • a hole making operation for making a hole 11 in the upper plate 10 is performed (step S1).
  • a superposition operation for superposing the upper plate 10 and the lower plate 20 is performed (step S2).
  • the joining auxiliary member 30 is arranged so that the hole 33 is coaxial with the hole 11 provided in the upper plate 10 and the major axis directions a x and b x coincide with each other. 10 (step S3). Then, as shown in FIG.
  • FIG. 2D shows a case where (a) arc welding work is performed using the melting electrode type gas shielded arc welding method.
  • drilling operation in step S1 include a) punching using a punch, b) press punching using a mold, and c) cutting using a laser, plasma, water jet method, or the like.
  • step S4 joins the joining auxiliary member 30 and the lower plate 20 via the weld metal 40 in the hole 11 of the upper plate 10, and fills the hole 33 provided in the joining auxiliary member 30. Is needed to do. Therefore, it is indispensable to insert a filler material (welding material) serving as a filler for arc welding. Specifically, the filler metal is melted and the weld metal 40 is formed by the following four arc welding methods.
  • the melting electrode type gas shielded arc welding method is a welding method generally referred to as MAG (Mig) or MIG (Mig), and uses a solid wire or a flux-cored wire as a filler and arc generating melting electrode, and CO 2.
  • MAG Mog
  • MIG MIG
  • Ar, and He are used to form a sound weld by shielding the weld from the atmosphere with a shielding gas such as Ar, He.
  • the non-gas arc welding method is also called a self-shielded arc welding method, which uses a special flux-cored wire as a filler and arc-generating electrode, and on the other hand, eliminates the need for shielding gas and forms a sound weld. is there.
  • the gas tungsten arc welding method is a kind of gas shielded arc welding method but is a non-melting electrode type and is generally called TIG (tig).
  • TIG tig
  • an inert gas of Ar or He is used as the shielding gas.
  • An arc is generated between the tungsten electrode and the base material, and the filler wire is fed to the arc from the side.
  • the filler wire is not energized, but there is also a hot wire type TIG that energizes to increase the melting rate. In this case, no arc is generated in the filler wire.
  • the plasma arc welding method has the same principle as TIG, it is a welding method in which the arc is contracted and the arc force is increased by the dual system and high speed of gas.
  • the coated arc welding method is an arc welding method in which a coated arc welding rod in which a flux is applied to a metal core wire is used as a filler, and does not require a shielding gas.
  • the material of the filler material (welding material), as long as the weld metal 40 is an Fe alloy, a commonly used welding wire or welding rod can be applied. Note that a Ni alloy is applicable because it does not cause a problem in welding with iron.
  • JIS JIS
  • arc welding methods are used to fill the hole portion 33 of the joining auxiliary member 30 with a filler material.
  • the target position of the filler wire or the welding rod is the long axis direction of the hole portion 33 of the joining auxiliary member 30 as welding progresses. a. Move along x .
  • the weld metal 40 fills the hole 33 of the joining auxiliary member 30 and further forms a surplus Wa on the surface of the joining auxiliary member 30 (see FIGS. 1B and 1C). If no extra space is formed, that is, as shown in FIG. 4A, the hole 33 remains in appearance after welding, the bonding strength is insufficient particularly for external stress in the plate thickness direction (three-dimensional direction). (See FIG. 4B). For this reason, as shown in FIG. 5, by forming the surplus Wa, deformation of the joining auxiliary member 30 is suppressed against external stress in the plate thickness direction (three-dimensional direction), and high joining strength is obtained. It is done.
  • an aluminum upper plate 10 and a steel lower plate 20 are simply overlapped, and a steel or nickel alloy welding wire is formed from the upper plate side.
  • the formed weld metal 40a is aluminum and steel or an alloy of aluminum, steel and nickel. This alloy exhibits an intermetallic compound (IMC) that is brittle because of its high aluminum content. Even if such a dissimilar weld joint 100a seems to be joined at first glance, if a tensile stress is applied in the lateral direction (shear tension), the weld metal 40a is easily broken as shown in FIGS. 8A and 8B.
  • a method is conceivable in which a hole 11 having an appropriate size is formed in the upper plate 10 and a welding material of steel or nickel alloy is melted so as to fill the hole 11.
  • a welding material of steel or nickel alloy is melted so as to fill the hole 11.
  • the weld metal 40b formed of the steel and the welding material which is the lower plate 20 formed at the initial stage of welding does not melt aluminum, an intermetallic compound is not generated, and it has high strength and toughness. And is firmly coupled to the lower plate 20.
  • the weld metal 40b formed in the hole 11 formed in the upper plate 10 has a very small proportion of aluminum melting, and the generation of intermetallic compounds is greatly suppressed, particularly in the central portion. Have.
  • the joining auxiliary member 30 of this embodiment is used so as to withstand the tensile stress in the shearing direction and the stress in the vertical peeling direction due to the problems in the two dissimilar welded joints 100a and 100b. That is, as shown in FIGS. 2A to 2D, a hole is formed in the upper plate 10, and a steel joining auxiliary member 30 having a hole 33 at the center is placed on the same axis, and the upper plate 10 and the bonding member are joined.
  • the weld metal 40 is formed by arc welding so as to fill the inside of the auxiliary member 30.
  • the joining auxiliary member 30, the weld metal 40, and the lower board 20 are weld-joined by the strong metal bond as a cross section.
  • the greatest role of the joining auxiliary member 30 which is wider than the hole 11 provided in the upper plate 10 is resistance to vertical peeling stress. As shown in FIG. 5, it is possible to prevent a phenomenon in which the interface between the upper plate 10 and the weld metal 40 is peeled off by applying an appropriately sized joining auxiliary member 30. Generally, the weld metal 40 breaks after sufficiently plastic deformation.
  • the joining auxiliary member 30 does not adversely affect the initial stress even with respect to the tensile stress in the shear direction, and further, the peeling stress after the welded portion is inclined by 90 ° (see FIG. 11B) due to the base material deformation. The phenomenon that the interface between the upper plate 10 and the weld metal 40 is peeled off due to the change is prevented.
  • the hole 33 of the joining auxiliary member 30 is filled with the weld metal in the hole 11 having the major axis and the minor axis provided in the upper plate 10, and thus the major axis and the minor axis are similar to the hole 11 of the upper plate 10. It has a non-circular shape with an axis.
  • the lower plate 20 and the joining auxiliary member 30 are joined, but the upper plate 10 is not metallicly joined.
  • the weld metal 40 melted into the hole 11 of the upper plate 10 has a non-circular penetration shape. Therefore, even if a force F R to the rotational direction in a plane acts, the lower plate 20 and the auxiliary bonding member 30 can be prevented from being rotated relative to the top plate 10.
  • the auxiliary bonding member 30 to increase the strength against external stress as the area is large and the thickness P H is larger thickness direction (three dimensional directions), desirable. However, if it is larger than necessary, it may cause an increase in weight or excessive protrusion from the surface of the upper plate 10, resulting in aesthetic appearance deterioration and interference with other adjacent members. For this reason, the size of the joining auxiliary member 30 is determined according to the required design.
  • the size (P SX , P SY ) of the hole 33 of the auxiliary joining member 30 is the same as or smaller than the size (P DX , P DY ) of the hole 11 provided in the upper plate 10. There must be. If the size (P SX , P SY ) of the hole portion 33 of the joining auxiliary member 30 is larger, a large amount of Al alloy or Mg alloy is melted by hitting the arc that is at a very high temperature, and a large amount is formed in the formed weld metal 40. This is because an intermetallic compound is formed and is easily embrittled.
  • Al and Mg evaporate, generating a large amount of spatter and fumes and polluting the surrounding environment. It is important in this welding method that Al and Mg are not melted or evaporated as much as possible. Therefore, it is necessary that the weld metal 40 is not exposed until it reaches the height of the joining auxiliary member 30.
  • the joining auxiliary member 30 plays a role of minimizing a gap (gap) g generated on the overlapping surface when the upper plate 10 made of Al alloy or Mg alloy and the lower plate 20 made of steel are overlapped ( 14A).
  • a gap (gap) g generated on the overlapping surface when the upper plate 10 made of Al alloy or Mg alloy and the lower plate 20 made of steel are overlapped ( 14A).
  • the weld metal 40 is thermally contracted, a force acts in a direction in which the lower plate 20 and the joining auxiliary member 30 approach each other.
  • the gap g decreases after welding and the design accuracy of the joint is increased.
  • the material of the steel joining auxiliary member 30 is not particularly limited as long as it is pure iron and an iron alloy, and examples thereof include mild steel, carbon steel, and stainless steel.
  • the various dimensions of the joining auxiliary member 30 are set as follows in relation to the upper plate 10 as shown in FIGS. 15 to 16B.
  • the long axis side length P SX of the hole 33 is designed to be 50% or more and 100% or less with respect to the long axis side length B DX of the hole 11 of the upper plate 10.
  • the short axis side length PSY of the hole 33 is designed to be 50% or more and 100% or less with respect to the short axis side length BDY of the hole 11 of the upper plate 10.
  • the size of the hole 33 of the auxiliary joining member 30 must be the same as or smaller than the size of the hole 11 formed in the upper plate 10 (that is, 100% or less). However, it is not desirable that the size of the hole 33 is too small.
  • FIG. 17B When the major axis side length P SX and the minor axis side length P SY of the hole 33 are less than 50% of the major axis side length B DX and the minor axis side length B DY of the hole 11, FIG. As shown, a gap is formed between the weld metal 40 to be formed and the hole wall of the upper plate 10, and when a stress in the shearing direction is applied, a large positional deviation is likely to occur. Also, as shown in FIG. 17B, the joining assisting member 30 is easily deformed and easily pulled out against the vertical peeling stress.
  • the major axis side length P SX and the minor axis side length P SY of the hole 33 of the joining auxiliary member 30 are the major axis side length B DX and the minor axis side of the hole 11 formed in the upper plate 10. It is desirable that the length B DY is 50% or more for each.
  • the long axis side length P DX of the joining auxiliary member 30 is designed to be 105% or more with respect to the long axis side length B DX of the hole 11 of the upper plate 10.
  • the minor axis side length P DY of the joining auxiliary member 30 is designed to be 105% or more with respect to the minor axis side length B DY of the hole 11 of the upper plate 10.
  • the joining auxiliary member 30 plays a main role as a resistance force when an external stress in the thickness direction, in other words, a stress to be peeled off is applied.
  • the joining auxiliary member 30 is desirable because the outer dimensions are larger and the thickness is larger, the strength is increased against external stress in the plate thickness direction (three-dimensional direction). If the major axis side length P DX and the minor axis side length P DY of the joining auxiliary member 30 are less than 105% of the major axis side length B DX and the minor axis side length B DY of the hole 11, the joining auxiliary member 30 However, when it is elasto-plastically deformed with respect to an external stress in the plate thickness direction, it is easy to obtain an apparent dimension equal to or smaller than the size of the hole 11 of the upper plate 10, and the upper plate 10 is likely to come off. That is, the joining auxiliary member 30 does not exhibit high resistance.
  • the major axis side length P DX and the minor axis side length P DY of the joining auxiliary member 30 are respectively set to 105% of the major axis side length B DX and the minor axis side length B DY of the hole 11 as lower limits. . More preferably, the major axis side length P DX and the minor axis side length P DY of the joining auxiliary member 30 are lower limits of 120% of the major axis side length B DX and the minor axis side length B DY of the hole 11, respectively. It is good to do. On the other hand, there is no need to provide an upper limit in terms of joint strength.
  • the thickness P H of the joining auxiliary member 30 is designed to be 50% or more and 150% or less of the plate thickness B H of the upper plate 10. As mentioned above, the auxiliary bonding member 30 to increase the strength against external stress large external dimensions, and as the thickness P H is larger thickness direction (three dimensional directions), desirable. By increasing the thickness P H of the joining auxiliary member 30 in accordance with the plate thickness B H of the upper plate 10 of the joint, a high resistance is exhibited. When the thickness P H of the joining auxiliary member 30 is less than 50% of the plate thickness B H of the upper plate 10, the joining auxiliary member 30 easily undergoes elasto-plastic deformation with respect to external stress in the plate thickness direction.
  • the thickness P H of the joining auxiliary member 30 is set to 50% of the plate thickness B H of the upper plate 10 as a lower limit.
  • the thickness P H of the joining auxiliary member 30 exceeds 150% of the plate thickness B H of the upper plate 10, there is no problem in the joint strength, but the overhanging shape results in poor appearance. Not only will the weight increase. Therefore, the thickness P H of the joining auxiliary member 30 needs to be 150% or less of the plate thickness B H of the upper plate 10.
  • the major axis side length W DX of the surplus Wa is a short axis.
  • the side length W DY is set to 105% or more of the long axis side length P SX and the short axis side length P SY of the hole 33 of the joining auxiliary member 30.
  • the joining auxiliary member 30 has a role of exerting resistance against external stress in the plate thickness direction (three-dimensional direction), but does not exhibit high resistance unless the hole 33 is completely filled.
  • the coupling area between the joining auxiliary member 30 and the weld metal 40 may be insufficient and may be easily detached.
  • the major axis side length W DX and the minor axis side length W DY are the major axis side length P SX and the minor axis side length P SY of the hole 33 of the auxiliary joining member 30. Will be exceeded.
  • the major axis side length W DX and the minor axis side length W DY of the surplus Wa are 105% or more of the major axis side length P SX and the minor axis side length P SY of the hole 33 of the auxiliary joining member 30, respectively. If this is the case, the overfill is surely formed, so this is the lower limit.
  • the board thickness of the upper board 10 and the lower board 20 is 4.0 mm or less. It is desirable to be. On the other hand, considering the heat input of arc welding, if the plate thickness is excessively thin, it will melt during welding and welding is difficult, so it is desirable that both the upper plate 10 and the lower plate 20 be 0.5 mm or more. .
  • the upper plate 10 can firmly join the aluminum alloy or magnesium alloy, and the lower plate 20 can firmly join the steel material.
  • the adhesive 60 may be applied around the entire circumference of the welded portion at the joint surface of the upper plate 10 and the lower plate 20 in an annular shape.
  • the adhesive 60 may be applied over the entire periphery of the welded portion at the joint surface of the upper plate 10 and the lower plate 20 in the second modification shown in FIGS. 19A and 19B. In this case, the rate of electrolytic corrosion of the upper plate 10, the lower plate 20, and the weld metal 40 can be reduced.
  • an adhesive 60 may be applied to the boundary between the joining auxiliary member 30 and the surface of the upper plate 10 as in the fourth modification shown in FIGS. 22A and 22B.
  • the application can be performed only before the welding process, but in the fourth modification shown in FIGS. 22A and 22B, the application can be performed before or after the welding process. It is.
  • the contact surface with the upper plate 10 of the joining auxiliary member 30 does not necessarily need to be a flat surface as shown in FIG. 23A. That is, as shown in FIGS. 23B and 23C, slits 34a and 34b may be provided on the contact surface of the joining auxiliary member 30 with the upper plate 10 as required.
  • a circumferential slit 34a, a grid-like slit 34b, or a radial slit (not shown) is provided on the contact surface side with the upper plate 10, the application of the adhesive 60 is applied to the gap between the slits 34a and 34b. Since it enters and does not escape, stable bonding is performed and the sealing effect is also ensured. Defining the thickness P H of the auxiliary bonding member 30 in the case of such a non-planar surface is the largest part of the height.
  • a bulging portion 21 may be provided on the lower plate 20 as in a fifth modification shown in FIG.
  • the thickness of the upper plate 10 made of Al or Mg alloy may be large.
  • the plate thickness of the upper plate 10 is large, it is necessary to melt a lot of welding wires in the welding process and fill the hole portion 33 of the joining auxiliary member 30 beyond the hole 11 of the upper plate 10, and the amount of heat becomes excessive.
  • the steel plate of the lower plate 20 is likely to melt away before the filling is completed. For this reason, if the bulging part 21 is provided by the drawing process about the lower board 20, since the volume of the hole 11 becomes small, it can be filled, preventing a melt-off defect.
  • the bulging portion 21 of the lower plate 20 serves as a mark for aligning the upper plate 10 and the lower plate 20, and the bulging portion 21 of the lower plate 20 and the hole of the upper plate 10. 11 can be easily matched, leading to an improvement in the efficiency of the overlaying work.
  • the drawing process of the bulging part 21 restrains the peripheral part of the part in which the bulging part 21 of the lower board 20 is formed with the die
  • the bulging part 21 is shape
  • this welding method of this embodiment can be said to be spot welding with a small joining area, when joining the overlapping portions J of practical members having a certain joining area, this welding method is shown in FIGS. 26A to 26C. As shown, multiple implementations may be performed. Thereby, strong joining is performed in the overlapping portion J.
  • this embodiment can be used for an open cross-sectional structure as shown in FIGS. 26B and 26C, it can be suitably used particularly for a closed cross-sectional structure as shown in FIG. 26A.
  • FIG. 28A to 28C show examples of the joining auxiliary member 30A having a plurality of hole portions 33, respectively.
  • a joining auxiliary member 30A When such a joining auxiliary member 30A is used, a plurality of holes 11 are also formed in the upper plate 10, and a plurality of holes 33 of the joining auxiliary member 30A and a plurality of holes 11 provided in the upper plate 10 are provided. Are arranged on the same axis. And while filling the some hole part 33 of the joining auxiliary member 30 with the weld metal 40, the lower board 20 and the joining auxiliary member 30 are welded.
  • the step of forming the non-circular holes 11 having different vertical and horizontal lengths in the upper plate 10 and the step of overlapping the upper plate 10 and the lower plate 20 are performed.
  • the hole 33 of the joining auxiliary member 30 is filled with the weld metal 40 by the step of arranging on the upper plate 10 so that a x and b x coincide with each other and the following methods (a) to (e): And welding the lower plate 20 and the joining auxiliary member 30 via the weld metal 40 in the hole 11 of the upper plate 10.
  • B Non-gas arc welding method using the welding wire as a melting electrode.
  • C Gas tungsten arc welding method using the welding wire as a non-melting electrode filler.
  • D A plasma arc welding method using the welding wire as a non-melting electrode filler.
  • E A coated arc welding method in which a coated arc welding rod from which an iron alloy or Ni alloy weld metal 40 is obtained is used as a melting electrode.
  • the upper plate 10 of the Al alloy or Mg alloy and the lower plate 20 of the steel can be joined with low-cost arc welding equipment with strong and reliable quality, and the open cross-section structure can be changed to the closed cross-section structure.
  • the bulging portion 21 is formed on the lower plate 20 by drawing, and the bulging portion 21 of the lower plate 20 is disposed in the hole 11 of the upper plate 10 in the overlapping process.
  • a step of applying the adhesive 60 around the hole 11 is further provided on at least one overlapping surface of the upper plate 10 and the lower plate 20.
  • an adhesive agent can act as a sealing material besides joint strength improvement, and can reduce the electrolytic corrosion rate of the upper board 10, the lower board 20, and the weld metal 40.
  • the adhesive 60 is applied to at least one facing surface between the joining auxiliary member 30 and the upper plate 10 facing the joining auxiliary member. Thereby, the electrolytic corrosion rate of the upper plate 10, the joining auxiliary member 30, and the weld metal 40 can be lowered.
  • the adhesive 60 is applied to the boundary between the joining auxiliary member 30 and the surface of the upper plate 10 during the arrangement process or after the filling and welding process. Thereby, the joining strength of the upper board 10 and the joining auxiliary member 30 can be improved. In addition, the effect
  • the long axis side length P SX of the hole 33 of the joining auxiliary member 30 is 50% or more and 100% or less with respect to the long axis side length B DX of the hole 11 of the upper plate 10. It is possible to prevent the intermetallic compound from being suppressed, the displacement due to the shear stress, and the upper plate 10 from coming off due to the vertical peeling stress.
  • the short axis side length P SY of the hole 33 is 50% or more and 100% or less with respect to the short axis side length B DY of the hole 11 of the upper plate 10, the intermetallic compound in the weld metal 40 is formed. It is possible to prevent the displacement of the upper plate 10 due to the suppression and the shear stress, and the upper plate 10 from coming off due to the vertical peeling stress.
  • the joining auxiliary member 30 since the major axis side length P DX of the joining auxiliary member 30 is 105% or more with respect to the major axis side length B DX of the hole 11 of the upper plate 10, the joining auxiliary member 30 is arranged outside the plate thickness direction. It can function as a resistance to stress.
  • the minor axis side length P DY of the joining auxiliary member 30 is 105% or more with respect to the minor axis side length B DY of the hole 11 of the upper plate 10.
  • the joining auxiliary member 30 is external to the plate thickness direction. It can function as a resistance to stress.
  • the joining auxiliary member 30 since the thickness P H of the joining auxiliary member 30 is 50% or more and 150% or less of the plate thickness B H of the upper plate 10, the joining auxiliary member 30 has a plate thickness in consideration of appearance and weight increase. Can act as a resistance to external stress in the direction.
  • the surplus Wa is formed on the surface of the joining auxiliary member, and the major axis side length W DX of the surplus Wa is the major axis side length P of the hole 33 of the joining auxiliary member 30. Since it becomes 105% or more with respect to SX , surplus Wa can function as a resistance force to the external stress of a plate
  • the upper plate 10 is provided with a plurality of holes 11, and the joining auxiliary member 30 includes a plurality of hole portions 33, and is provided in the plurality of hole portions 33 of the joining auxiliary member 30 and the upper plate 10.
  • the plurality of holes 11 are arranged coaxially and the respective major axis directions a x and b x coincide with each other, and the plurality of holes 33 of the joining auxiliary member 30 are respectively filled with the weld metal 40 and
  • the lower plate 20 and the joining auxiliary member 30 are welded through the weld metal 40 in the hole 11 of the plate 10.
  • joining auxiliary member 30 of the present embodiment is made of steel, and is formed with non-circular hole portions 33 having different vertical and horizontal lengths. Thereby, joining auxiliary member 30 is used suitably for the arc welding method for different material joining mentioned above.
  • the dissimilar material welded joint 1 of the present embodiment includes an upper plate 10 made of an aluminum alloy or a magnesium alloy, and a steel lower plate 20 arc-welded to the upper plate 10, and the upper plate 10 It further includes a steel joining auxiliary member 30 that has non-circular holes 11 having different vertical and horizontal lengths facing the overlapping surface with the plate 20, and is formed with non-circular hole portions 33 having different vertical and horizontal lengths.
  • the auxiliary member 30 is disposed on the upper plate 10 so that the hole 33 is coaxial with the hole 11 provided in the upper plate 10 and the major axis directions a x and b x coincide with each other.
  • the hole 33 is filled with a weld metal 40 of iron alloy or Ni alloy, and a melted portion W is formed by the weld metal 40 and a part of the molten lower plate 20 and the joining auxiliary member 30.
  • a weld metal 40 of iron alloy or Ni alloy a weld metal 40 of iron alloy or Ni alloy
  • a melted portion W is formed by the weld metal 40 and a part of the molten lower plate 20 and the joining auxiliary member 30.
  • Example A a lap joint having a combination in which the upper plate 10 is an aluminum alloy A5083 having a plate thickness of 1.6 mm and the lower plate 20 is a 590 MPa class high-tensile steel plate having a plate thickness of 1.4 mm was used.
  • this lap joint uses a JIS Z3312 G78A4MN5CM3T steel welding wire with a diameter of 1.2 mm, and an arc while moving the welding wire by a mag welding method using a mixed gas of Ar 80% + CO 2 20% as a shielding gas. Joined by welding.
  • the welded joint 1 is subjected to a destructive test according to JIS Z3136 “Test spot dimensions and test method for shear test of resistance spot and projection welded joint” and JIS Z3137 “Cross tensile test of resistance spot and projection welded joint”. It was.
  • the long axis side of the hole 11 provided in the upper plate 10 and the long axis side of the hole portion 33 of the joining auxiliary member 30 are directed to the short side of the rectangular upper plate 10 as a test piece.
  • the tensile strength of Z3136 is represented as TSS
  • the tensile strength of Z3137 is represented as CTS.
  • TSS ⁇ 8 kN and CTS ⁇ 5 kN.
  • JASO-CCT Japanese Automobile Standards Organization Corrosion Test
  • JASO-CCT Japanese Automobile Standards Organization Corrosion Test
  • the welded joint is accelerated and corroded in the order of salt spray, drying and wetting.
  • Destructive testing was performed to obtain post-corrosion TSS and post-corrosion CTS.
  • the acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
  • a ⁇ b> 1 is obtained by performing arc welding directly on the upper plate 10 without using a joining auxiliary member and without making a hole in the upper plate 10. Also, no adhesive is used. Since the steel welding wire and the aluminum base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
  • a 2 a rounded round hole 11 having a major axis length of 9.0 mm and a minor axis length of 7.0 mm is provided on the upper plate 10, but arc welding is performed without using the joining auxiliary member 30.
  • No. A3 is obtained by placing the joining auxiliary member 30 on the upper plate 10 which is not perforated and arc welding from above.
  • the material of the joining auxiliary member 30 is JIS G3106 SM490C, and the outer shape is similar to the hole 11 of the upper plate 10 (hereinafter, the material of Example A is the same).
  • the joining auxiliary member 30 is not perforated. As a result, the joining auxiliary member 30 and the upper plate 10 could not penetrate into the lower plate 20 and could not be welded.
  • No. A4 is obtained by placing the auxiliary joining member 30 on the upper plate 10 having a rounded rectangular shape with a major axis length of 9.0 mm and a minor axis length of 7.0 mm, and arc welding from above.
  • the joining auxiliary member 30 is not perforated.
  • the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
  • No. A5 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above.
  • the joining auxiliary member 30 has a rounded rectangular hole having a major axis length of 9.0 mm and a minor axis length of 7.0 mm.
  • the weld metal was No.
  • A1 since the steel welding wire and the aluminum base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
  • a rounded rectangular joining auxiliary member 30 is placed on the upper plate 10 in which a rounded rectangular hole having a major axis length of 9.0 mm and a minor axis length of 7.0 mm is drilled. Arc welded.
  • the joining auxiliary member 30 is provided with a rounded rectangular hole having an appropriate size within the scope of the present invention. In these test bodies, the aluminum inflow of the weld metal 40 to be formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and a high-quality weld metal is formed.
  • the post-corrosion TSS and the post-corrosion CTS increase in order as the number of A9 and adhesive application points increases.
  • No. A15 is the thickness P H of the auxiliary bonding member 30 is beyond the most preferred range, the joint performance is good performance without any problem.
  • this is an example that deviates from the most preferable range in that it requires a longer welding time than others and is not beautiful because it lacks in appearance and flatness.
  • Example B a combination lap joint was used in which the upper plate 10 was a magnesium alloy ASTM AZ31B having a plate thickness of 0.8 mm, and the lower plate 20 was a 780 MPa class high strength steel plate having a plate thickness of 1.0 mm.
  • this lap joint is formed by a DC TIG welding method using Ar 100% gas as a shielding gas, and a tungsten electrode and a filler while inserting a steel welding wire of JIS Z3317 W55-1CM3 having a diameter of 1.0 mm as a non-conducting filler. Joining was performed by arc welding while moving the wire.
  • a destructive test was performed on the welded joint 1 in accordance with JIS Z3136 and JIS Z3137.
  • the long axis side of the hole 11 provided in the upper plate 10 and the long axis side of the hole portion 33 of the joining auxiliary member 30 are directed to the short side of the rectangular upper plate 10 as a test piece.
  • the tensile strength of Z3136 is represented as TSS
  • the tensile strength of Z3137 is represented as CTS.
  • TSS ⁇ 4 kN and CTS ⁇ 3 kN.
  • JASO-CCT is performed on the welded joint 1 for 28 days, and then a destructive test is performed in the same manner to perform post-corrosion TSS and post-corrosion CTS. Acquired.
  • the acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
  • No. B1 does not use a joining auxiliary member, does not make a hole in the upper plate 10, and performs direct arc welding on the upper plate 10.
  • No adhesive is used. Since the steel welding wire and the magnesium base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
  • No. B2 is provided with an elliptical hole 11 consisting of a semicircle-rectangle-semicircle having a major axis length of 7.0 mm and a minor axis length of 5.0 mm on the upper plate 10, but arc welding without using a joining auxiliary member. It has been implemented. No. Compared to B1, the amount of magnesium alloy mixed in the weld metal is reduced, so the amount of intermetallic compounds is small and the degree of embrittlement is low, but still TSS and CTS are low.
  • No. B3 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above.
  • the material of the joining auxiliary member 30 is JIS G3101 SS400, and the outer shape is circular (hereinafter, the material of Example B and the outer diameter shape are the same).
  • the joining auxiliary member 30 is not perforated.
  • the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
  • No. B4 is No.
  • the joining auxiliary member 30 is placed on the upper plate 10 in which the oval hole 11 similar to B2 is drilled, and arc welding is performed thereon.
  • the joining auxiliary member 30 is not perforated.
  • the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
  • No. B5 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above.
  • the joining auxiliary member 30 is formed with a hole having a diameter of 3.8 mm.
  • the weld metal was No. Similar to B1, since the steel welding wire and the magnesium alloy base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
  • No. B6 to B17 are circular joining aids on the upper plate 10 in which an elliptical hole 11 made of a semicircle-rectangle-semicircle having a major axis length of 7.0 mm ⁇ minor axis length of 5.0 mm is formed.
  • the member 30 is placed and arc-welded from above.
  • the joining auxiliary member 30 is provided with an oval hole having an appropriate size within the scope of the present invention. In these test bodies, the magnesium inflow of the weld metal 40 to be formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and the high-quality weld metal 40 is formed.
  • CTS was also obtained.
  • the specimens (B7 to B17) coated with an adhesive at an appropriate location have the effect of preventing electrolytic corrosion at the magnesium alloy-steel interface, and the decrease in CTS and TSS due to corrosion is suppressed, and after high corrosion.
  • CTS and TSS are shown. Specifically, no. For B6, no. B7, No. B8, No. It can be seen that the post-corrosion TSS and the post-corrosion CTS increase in order as the number of B9 and adhesive application points increases.
  • Example C a combination lap joint was used in which the upper plate 10 was an aluminum alloy A6061 with a plate thickness of 3.6 mm, and the lower plate 20 was a 400 MPa class steel plate with a plate thickness of 2.6 mm.
  • the lap joint was joined by arc welding while moving the welding rod by a coated arc welding method using a JIS Z3224 ENi6062 Ni alloy-coated arc welding rod having a diameter of 4.0 mm.
  • a deep drawing process using a punch is performed on the welded portion of the lower plate 20 to enter a height of 1.8 mm, that is, the center of the thickness of the hole 11 provided in the upper plate 10.
  • a destructive test was performed on the welded joint 1 in accordance with JIS Z3136 and JIS Z3137.
  • the long axis side of the hole 11 provided in the upper plate 10 and the long axis side of the hole portion 33 of the joining auxiliary member 30 are directed to the short side of the rectangular upper plate 10 as a test piece.
  • the tensile strength of Z3136 is represented as TSS
  • the tensile strength of Z3137 is represented as CTS.
  • TSS 9 kN
  • CTS ⁇ 6 kN.
  • JASO-CCT was performed on welded joint 1 for 28 days, and then a destructive test was performed in the same manner. CTS was obtained after corrosion.
  • the acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
  • No. C3 is obtained by placing the joining auxiliary member 30 on the upper plate 10 that is not perforated and arc welding from above.
  • the material of the joining auxiliary member 30 is JIS G4051 S12C, and the outer diameter shape is a rounded square (hereinafter, the material of Example C and the outer diameter shape are the same).
  • the joining auxiliary member 30 is not perforated. As a result, the joining auxiliary member 30 and the upper plate 10 could not penetrate into the lower plate 20 and could not be welded.
  • No. C4 is obtained by placing the joining auxiliary member 30 on the upper plate 10 having an elliptical hole having a major axis of 12.0 mm and a minor axis of 9.0 mm, and arc welding from above.
  • the joining auxiliary member 30 is not perforated.
  • the penetration width of the lower plate 20 was very small, and it was easily broken when subjected to a destructive test.
  • No. C5 is obtained by placing the joining auxiliary member 30 on the upper plate 10 which is not perforated and arc welding from above.
  • the joining auxiliary member 30 has a diameter of 7.0 mm.
  • the weld metal was No. Similar to C1, since the Ni alloy welding rod and the magnesium alloy base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, resulting in low TSS and CTS.
  • No. C6 to C13 are obtained by mounting a rounded square joining auxiliary member 30 on the upper plate 10 having an elliptical hole having a major axis of 12.0 mm and a minor axis of 9.0 mm, and arc welding from above. .
  • the joining auxiliary member 30 is provided with an oval hole having an appropriate size within the scope of the present invention. In these specimens, the aluminum inflow of the weld metal formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and a high quality weld metal is formed.
  • CTS was also obtained.
  • the plate thickness of the upper plate 10 is relatively thick at 3.6 mm, the distance between the joining auxiliary member 30 and the lower plate 20 is reduced at the welded portion by deep drawing of the lower plate 20, improving the welding efficiency and preventing the falling-off. The effect was obtained.
  • the test specimens (No. C7 to C11) coated with an adhesive at appropriate locations have the effect of preventing electrolytic corrosion at the aluminum / steel interface, and the decrease in CTS and TSS due to corrosion is suppressed, resulting in high corrosion. Post CTS and TSS were shown.
  • Example D a combination lap joint was used in which the upper plate 10 was an aluminum alloy A6N01 having a plate thickness of 1.2 mm, and the lower plate 20 was an SPCC steel plate having a plate thickness of 1.2 mm.
  • the lap joint was joined by arc welding while moving the welding wire by a self-shielded arc welding method using a JIS Z3313 T49YT4-0NA steel flux cored wire having a diameter of 1.2 mm.
  • a destructive test was performed on the welded joint 1 in accordance with JIS Z3136 and JIS Z3137.
  • the long axis side of the hole 11 provided in the upper plate 10 and the long axis side of the hole portion 33 of the joining auxiliary member 30 are directed to the short side of the rectangular upper plate 10 as a test piece.
  • the tensile strength of Z3136 is represented as TSS
  • the tensile strength of Z3137 is represented as CTS.
  • TSS ⁇ 6 kN
  • CTS ⁇ 4 kN.
  • JASO-CCT was performed on welded joint 1 for 28 days, and then a destructive test was performed in the same manner. TSS and post-corrosion CTS were obtained. The acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
  • No. D ⁇ b> 1 is obtained by performing arc welding directly on the upper plate 10 without using a joining auxiliary member and without making a hole in the upper plate 10. No adhesive is used. Since the steel welding wire and the aluminum base material were melted and mixed, the formed weld metal was an extremely brittle intermetallic compound, and had low TSS and CTS.
  • No. D3 to D5 are obtained by mounting a circular joining auxiliary member 30 obtained by processing a JIS G3106 SM490A material on an upper plate 10 having a rectangular hole of 9.0 mm ⁇ 6.0 mm and arc welding from above. It is.
  • the joining auxiliary member 30 is provided with a rectangular hole having an appropriate size within the scope of the present invention. In these test bodies, the aluminum inflow of the weld metal 40 to be formed is suppressed to zero or extremely low due to the presence of the joining auxiliary member 30, and the high-quality weld metal 40 is formed.
  • Example E a combination lap joint was used in which the upper plate 10 was an aluminum alloy A7N01 having a plate thickness of 4.0 mm, and the lower plate 20 was a 1180 MPa class high-tensile steel plate having a plate thickness of 3.0 mm. A bulging portion 21 having a height of 2.0 mm was formed at a portion to be welded of the lower plate 20 by drawing.
  • this lap joint uses a JIS Z3321 YS309L stainless steel welding wire with a diameter of 1.2 mm, and is a welding wire by a plasma arc welding method in which shielding gas: Ar 99% + H 2 1% and plasma gas: Ar 100%. It was joined by arc welding while moving.
  • the welded joint 1 is subjected to a destructive test according to JIS Z3136 “Test spot dimensions and test method for shear test of resistance spot and projection welded joint” and JIS Z3137 “Cross tensile test of resistance spot and projection welded joint”. It was.
  • the long axis side of the hole 11 provided in the upper plate 10 and the long axis side of the hole portion 33 of the joining auxiliary member 30 are directed to the short side of the rectangular upper plate 10 as a test piece.
  • the tensile strength of Z3136 is represented as TSS
  • the tensile strength of Z3137 is represented as CTS.
  • TSS 10 kN
  • CTS tensile strength of Z3137
  • JASO-CCT was performed on the welded joint 1 for 28 days, and then a destructive test was performed in the same manner, and after corrosion TSS and corrosion Post CTS was obtained.
  • the acceptable judgment value of these preferable performance values was 80% or more with respect to the value of the corrosion free test.
  • No. E1 to E3 are obtained by placing a rectangular joining auxiliary member 30 made of SUS304 stainless steel on the top plate 10 having a rounded rectangular hole of 21.0 mm ⁇ 18.0 mm and arc welding from above. is there.
  • the joining auxiliary member 30 is provided with a rounded rectangular hole having an appropriate size within the scope of the present invention.
  • the aluminum inflow to the weld metal 40 to be formed is suppressed to zero or extremely low by the presence of the joining auxiliary member 30, and a high-quality weld metal is formed.
  • the plate thickness of the upper plate 10 is comparatively thick at 4.0 mm, the distance between the auxiliary joining member 30 and the lower plate 20 is reduced at the welded portion by deep drawing of the lower plate 20 to improve the welding efficiency and prevent the metal from falling off. The effect was obtained.
  • the test body No. which applied the adhesive material to an appropriate location.
  • E1 and E3 have the effect of preventing electrolytic corrosion at the aluminum-steel interface, and the decrease in CTS and TSS due to corrosion was suppressed, and high post-corrosion CTS and TSS were shown.
  • the test body No. with no adhesive was used.
  • no. E3 is coated with an adhesive, and the post-corrosion TSS and post-corrosion CTS are improved.

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Abstract

Un joint de soudage en matériaux différents (1) est pourvu : d'une plaque supérieure (10) qui est constituée d'un alliage d'aluminium ou d'un alliage de magnésium ; et d'une plaque inférieure (20) qui est constituée d'acier et qui est soudée à l'arc à la plaque supérieure (10), la plaque supérieure (10) possédant un trou non circulaire (11) qui présente une longueur et en largeur différentes et qui fait face à une surface superposée sur la plaque inférieure (20). Le joint de soudage en matériaux différents (1) est en outre pourvu d'un élément auxiliaire de jontoiement (30) en acier et dans lequel une partie trou non circulaire (33) de longueur et la largeur différentes est formée. L'élément auxiliaire de jointoiement (30) est disposé sur la plaque supérieure (10) de telle sorte que la partie trou (33) soit coaxiale au trou (11) prévu sur la plaque supérieure (10), et les directions d'axe long respectives ax et bx coïncident, la partie trou (33) de l'élément auxiliaire de jontoiement (30) est remplie d'un métal de soudage (40) constitué d'un alliage de fer ou d'un alliage de Ni, une partie de fusion (W) est formée par le métal de soudage (40) et des parties de la plaque inférieure (20) et de l'élément auxiliaire de jonction (30) qui ont fondu.
PCT/JP2016/079832 2016-08-29 2016-10-06 Procédé de soudage à l'arc pour joindre différents matériaux, élément auxiliaire de jontoiement et joint de soudage en matériaux différents WO2018042682A1 (fr)

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JP2016166841A JP2018034167A (ja) 2016-08-29 2016-08-29 異材接合用アーク溶接法、接合補助部材、及び、異材溶接継手

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EP3957426A4 (fr) * 2019-04-19 2022-06-15 Panasonic Intellectual Property Management Co., Ltd. Structure d'assemblage
EP3957425A4 (fr) * 2019-04-19 2022-06-22 Panasonic Intellectual Property Management Co., Ltd. Structure d'assemblage
EP4005721A4 (fr) * 2019-09-18 2022-10-26 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Procédé de jonction et corps joint

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JP2015167972A (ja) * 2014-03-07 2015-09-28 株式会社神戸製鋼所 異材接合体の製造方法

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EP3957426A4 (fr) * 2019-04-19 2022-06-15 Panasonic Intellectual Property Management Co., Ltd. Structure d'assemblage
EP3957425A4 (fr) * 2019-04-19 2022-06-22 Panasonic Intellectual Property Management Co., Ltd. Structure d'assemblage
EP4005721A4 (fr) * 2019-09-18 2022-10-26 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Procédé de jonction et corps joint

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