[0001]The present disclosure is a method for producing a welded joint, and a welded joint. BACKGROUND [0002]A plurality of steel plates, such as plate thickness and different compositions joined for example by laser welding, a technique for manufacturing a single tailored blank is known (see, for example, JP-A-2002-144066). Summary of the Invention [0003]In the case of laser welding a plurality of steel plates by the technique, if it contains aluminum-plated steel sheet into a plurality of steel plates, aluminum content of the weld portion is larger than the composition of the steel sheet components. When many containing aluminum weld hardenability of the weld is reduced. Therefore, when the quenching the member where the aluminum-plated steel sheet to laser welding, a difference occurs in the mechanical properties in the welded portion and the other portions, members of uniform mechanical properties there is a problem that can not be obtained. This problem is not limited to the case of producing a tailored blank, welding a plurality of steel plates including aluminum-plated steel sheet, even occurs in the case of the heat treatment such as quenching. Especially when the aluminum content of the weld portion is not less than 1.0 mass%, this problem becomes apparent. [0004] 　The purpose of the present disclosure, in the case of welding a plurality of steel plates including aluminum-plated steel sheet, a method of manufacturing a welded joint can be obtained welded joint aluminum content is less welds, and, aluminum content of the weld small (less than 1.0% by weight) to provide a weld joint. [0005] 　Subject matter of the present disclosure is as follows. [0006] [1] 　An aluminum-plated steel sheet comprising an aluminum-plated layer sandwiched between the electrode wheels pair, by rotating the electrode wheel pairs in the circumferential direction, the aluminum while moving the electrode wheel pair to the aluminum-plated steel sheet and energizing the plated steel sheet, 　in a laminated state and the aluminum layer and the other steel sheet, and be welded to the other steel plate portions which are energized by the energizing of said aluminum plated steel sheet 　welded with the manufacturing method of the joint. (Operation and Effect) 　In this manufacturing method, first, scissors aluminum-plated steel sheet comprising an aluminum plated layer between the electrode wheels pair, by rotating the electrode wheel pairs in the circumferential direction, the electrode wheel pair of the aluminum-plated steel sheet while moving to energizing the aluminum-plated steel sheet. As a result, part of the aluminum layer is removed in a place where it has been energized among aluminum steel plate. Next, in a state of overlapping the aluminum layer and the other steel plate, welded portions that are energized by the energization of the aluminum-plated steel sheet (i.e., location where a part of the aluminum layer is removed) and the other steel plate . As a result, the welded joint obtained by welding the aluminum content of the weld portion becomes smaller than in the case of welding without going through energization. 　In the power supply to the aluminum plated steel sheet, only the aluminum-plated steel sheet sandwiched between the electrode wheels pairs, it may be in the state in which the first superimposed and the aluminum-plated steel sheets and other steel sheet at a stage of welding, before performing the energization it may be from the stage in a state of overlapping an aluminum-plated steel sheets and other steel sheets. [0007] [2] 　The energization is performed in a stacked state a plurality of steel plates including said other steel sheet and the aluminum-plated steel sheet, 　in the welding, overlapping the plurality of steel plates without shifting from the state at the time of the energization welded remain state, 　method for producing a welded joint according to [1]. [0008] [3] 　In the above energization it does not produce nuggets 　manufacturing method of the welded joint according to [2]. [0009] [4] 　kinds of the welding is seam welding, 　[1] to the production method of the welded joint according to any one of [3]. [0010] [5] 　The carbon content of the interior of the steel of the aluminum-plated steel sheet is not less than 0.15 wt%, 　[1] to [4] or a manufacturing method of a welded joint according to one of. [0011] [6] 　[1] to [5] any one to quench the welds of the welded joint produced by the production method of the welded joint according to Section of 　further comprising manufacturing method of quenching member. [0012] [7] 　and the aluminum-plated steel sheet having an aluminum plating layer, 　wherein the other steel sheets overlaid with aluminum plating layer, 　a nugget connecting the said other steel sheet and the aluminum-plated steel sheet 　with a welded joint with a 　said aluminum content per unit area when viewed from a direction perpendicular to the aluminum-plated steel sheet of the nugget, per unit area of the aluminum layer containing the aluminum layer present on the surface side of the steel plates are superimposed less than 75% of the aluminum content, 　the aluminum content of the nugget is less than 1.0 wt%, 　the carbon content of the nugget is at least 0.15 mass%, 　the welding length 100mm per the nugget It said internal defect nugget is 3 or less, the 　weld joint. [0013] [8] 　hardened member having a welded joint according to [7]. [0014] (1) 　at least scissors one side of the aluminum-plated steel sheet comprising an aluminum plated layer between the electrode wheels pairs, rotating electrode wheel in the circumferential direction, the electrode wheels pairs are energized in the aluminum-plated steel sheet while moving on the aluminum-plated steel sheet a first step, 　the welding in a state of overlapping with the aluminum layer and the other steel plate (or a different aluminum-plated steel sheet), the energized portion of the aluminum-plated steel sheet in the first step and the other steel plate a second step, the 　method for producing a welded joint with a. (Operation and Effect) 　In the first step, at least scissors aluminum-plated steel sheet comprising an aluminum-plated layer on one side between the electrode wheels pairs, rotating electrode wheel in the circumferential direction, while the electrode wheels pair moves on aluminum-plated steel sheet energizing the aluminum-plated steel sheet. As a result, part of the aluminum layer is removed in the energized position of the aluminum steel sheet. Then, in a second step, a portion where part of the aluminum layer is removed, welded in a state of overlapping with the other steel plate. As a result, the welded joint obtained by the welding of the second step, the aluminum content of the weld portion becomes smaller than in the case of welding without through the first step. 　In the first step scissor only aluminum-plated steel sheet between the electrode wheels pairs, it may be in the state in which the first superimposed and the aluminum-plated steel sheets and other steel plate in the second step, the step of performing the first step it may be a laminated state and the aluminum-plated steel sheets and other steel sheets. [0015] (2) 　In the first step, overlapping a plurality of steel plates including the aluminum-plated steel sheet, 　and in the second step, welding the plurality of steel plates while superposed without shifting from the first step, 　(1 method for producing a welded joint according to). [0016] (3) 　In the first step, not to produce a nugget, 　a manufacturing method of the weld joint according to (2). [0017] (4) 　the type of welding of the second step is a seam welding, 　(1) to the production method of the welded joint according to any one of (3). [0018] (5) 　the carbon content of the interior of the steel of the aluminum-plated steel sheet is not less than 0.15 mass%, 　(1) - (4) The method of producing a welded joint according to any one of. [0019] (6) 　(1) quenching the weld of the welded joint produced by the production method of any one of the welded joint to (5), 　the manufacturing method of quenching member. [0020] (7) 　at least an aluminum-plated steel sheet having an aluminum plating layer on one side, 　the other steel plate overlaid with the aluminum layer, 　and a nugget connecting the said other steel sheet and the aluminum-plated steel sheet 　was welded joint with a Te, 　aluminum content per unit area when viewed from a direction perpendicular to the aluminum-plated steel sheet of the nugget, less than 75% of the aluminum content per unit area of the aluminum layer present on the superimposed side , and the 　aluminum content of the nugget is less than 1.0 wt%, 　the carbon content of the nugget is at least 0.15 wt%, 　said nugget internal defects per weld length 100mm of the nuggets 3 or less, 　the weld joint. [0021] (8) 　(7) quenching member having a welded joint according to any one of - (10). [0022] 　According to the manufacturing method of the welded joint of the present disclosure, in the case of welding a plurality of steel plates including aluminum plated steel sheet, it is possible to obtain a welded joint of aluminum content of the weld portion is small. BRIEF DESCRIPTION OF THE DRAWINGS [0023] [Figure 1A] Figure 1A is a diagram illustrating an example of a first step, the manner in which in particular carry out the first step one by one with respect to the aluminum-plated steel sheet included in the plurality of steel plates are welded material It illustrates. FIG 1B] Figure 1B is an enlarged view corresponding to FIG. 1A. [Figure 2A] Figure 2A is a diagram showing an example of the first step is specifically a diagram showing a state of performing the first step in a laminated state two steel plates including aluminum-plated steel sheet. [Figure 2B] Figure 2B is an enlarged view corresponding to Figure 2A. [Figure 3A] Figure 3A is a diagram showing a first step when performing mash seam welding in the second step shows how to perform the first step one by one in particular. [Figure 3B] Figure 3B is a diagram showing a first step when performing mash seam welding in the second step shows how the specifically perform the first step by overlapping two steel plates. [Figure 4A] Figure 4A, in the case of mash seam welding in the second step is a diagram showing a state in which overlapping edge portions of the steel plates prior to welding. [Figure 4B] Figure 4B is a diagram showing a welded joint after the mash seam welding in the second step together with the electrode wheels pairs. [Figure 5A] Figure 5A is a cross-sectional view showing a welded joint in the case of performing seam welding in the second step. [Figure 5B] Figure 5B is a vertical weld joint shown in FIG. 5A to aluminum-plated steel sheet is a view as seen from the direction. DESCRIPTION OF THE INVENTION [0024] 　The following describes embodiments of the present disclosure. [0025] 　method for producing a welded joint of the present disclosure is a method of joining a plurality of steel plates. [0026] 　At least one of the steel plates of the junction of the target (material to be joined) In the manufacturing method of the welded joint of the present disclosure, "a plurality of steel plates," is an aluminum-plated steel sheet. 　For example, when joining two steel plates, and when the other with one of the two steel plates is aluminum-plated steel sheet is a steel sheet other than aluminum-plated steel sheets, both of the two steel plates in aluminum-plated steel sheet there is a certain case. [0027] (Aluminum-plated steel sheet) 　and "aluminum-plated steel sheet" means a steel sheet having an aluminum plating layer on at least one surface. That is, aluminum-plated steel sheets, steel sheets provided with an aluminum-plated layer on one side or a steel sheet comprising an aluminum-plated layer on both surfaces. 　Incidentally, when simply referred to as "steel sheet" includes aluminum-plated steel sheet. [0028] (Aluminum layer) 　The aluminum layer, unless otherwise specified, the percentage of aluminum contained in the plating layer means a plating film of 50 mass% or more. Thus, the aluminum plating layer, for example, may be one obtained by 10 wt% of silicon (Si) of aluminum and silicon alloy bath that is appended (Al-10Si%). Of course, the ratio of aluminum contained in the plating film, it may be 70 mass% or more, may be 80 mass% or more, or may be 90 mass% or more. [0029] : (Material to be plated inside a steel aluminum plated steel sheet) 　carbon content in steel which is the material to be plated (internal steel aluminum-plated steel sheet) is not particularly limited. 　However, the method for producing a welded joint of the present disclosure, the case of producing a tailored blank subjected to hot pressing can be considered. In such cases, in order to quench and strengthening of the steel is a material to be plated in the hot press, it is desirable that the carbon content of the steel for example 0.15 wt% or more as an object to be plated. 　Note that "tailored blank" in this disclosure, is a plate material formed by joining by welding a plurality of steel plates thickness and different compositions. Tailored blank is generally subjected to press working. [0030] 　method for producing a welded joint of the present disclosure includes a first step, a second step performed after the first step. Hereinafter will be described in the order for the first and second steps. [0031] 　In the following, the case of joining the two steel plates. However, the present disclosure is not limited thereto and can be applied to the case of joining three or more steel plates. [0032] 　The first step is at least scissors one surface of aluminum-plated steel sheet comprising an aluminum plated layer between the electrode wheels pairs, rotating electrode wheel in the circumferential direction, the electrode wheels pair moves on aluminum-plated steel sheet while a step of energizing the aluminum-plated steel sheet. 　The first step, in a place where it has been energized in the aluminum-plated steel sheets, aluminum-plated layer is extruded from immediately below the electrode wheels. As a result, part of the aluminum layer is removed. [0033] 　The first step, the two methods. 　The first method, as shown in Figure 1A, moves a piece of aluminum coated steel sheet 10 sandwiched between the electrode wheels pair 50, and the rotary electrode wheel in the circumferential direction, the electrode wheel pair on aluminum-plated steel sheet it is a method for energizing the aluminum-plated steel sheet while. In other words, a method of removing a portion of the aluminum layer one by one with respect to aluminum-plated steel sheet 10 contained in the two steel plates are welded material. 　The second method, as shown in FIG. 2A, a method performed in a state in which two steel plates 10 and 20 is a material to be joined are superposed. In other words, overlapping the two steel plates comprising aluminum-plated steel sheet sandwiched between the electrode wheels pairs is a method for energizing. Steel sheet may be three or more. Among the steel plate, at least one sheet may be a aluminum-plated steel sheet. [0034] : (The first method how to do one by one first step, its action) 　state as a first method, which in FIG. 1B, scissors a piece of aluminum coated steel sheet 10 between the electrode wheels pair, is energized to expand shown. Incidentally, aluminum-plated steel sheet 10 shown in FIG. 1B is an aluminum-plated steel sheet 10 with aluminum layer 14A, and 14B on both sides. 　1B, the electrode wheel 50 is moved to rotate in the arrow R direction. Pressurization of the electrode wheels 50, by energization, the aluminum plating layer 14A, 14B is discharged to the lateral (the direction of arrow F in FIG. 1B, forward traveling direction to the steel sheet of the electrode wheel pair 50) ahead of the vehicle with respect to and traveling direction that. Thus, aluminum layer 14A, a part of 14B is removed at the location performing the first step of the aluminum-plated steel sheet 10 (i.e. locations electrode wheel is passed energized). 　Even when performing the first step in an aluminum-plated steel sheet with aluminum plating layer only on one side, a portion of the aluminum layer is removed at the location which is energized in the first step. [0035] 　If both of the two steel plates are welded material is an aluminum-plated steel sheet, respectively for each of the aluminum-plated steel sheet, it is preferable to carry out the first step. However, even if the first step only for the aluminum-plated steel sheet of one, a certain effect can be obtained. 　Also, of the two steel plates, if only one is aluminum plated steel sheet, it may be performed first step only for the aluminum-plated steel sheet. [0036] (The second method: a method of the first step performed two Again, the effect) 　in FIG. 2B, illustrates a second method. Aluminum-plated steel sheets 10, 20 are superposed 2 sheets. Sandwiching two superposed aluminum-plated steel sheets 10, 20 were between the electrode wheels pair 50. Electrode wheel is rotated in the circumferential direction, the electrode wheels pair is energized while moving on aluminum-plated steel sheet. Incidentally, two aluminum-plated steel sheets 10 and 20 are both provided with an aluminum-plated layer on both surfaces. 　As shown by the arrow F1 in Figure 2B, an aluminum plating layer 14A present in the portion in contact with the electrode wheels pair 50 of the aluminum layer, 24B is a first step of the aluminum-plated steel sheet 10 of the one described above similar to the case of, are discharged laterally to the traveling direction forward or advancing direction of the electrode wheels. The Not only that, as shown by the arrow F2 in FIG. 2B, an aluminum plating layer 14B that are present in a portion not in contact with the electrode wheel pair 50 of the aluminum layer, 24A (i.e., aluminum-plated steel sheets 10 and 20 are superposed aluminum layer 14B which exists on the surface side, 24A) are also discharged pushed laterally with respect to the front and the traveling direction by the pressure applied from the electrode wheels pair 50. [0037] (Energized to place) 　position to be energized in the first step of the aluminum-plated steel sheet (hereinafter, simply referred to as "energization point".) It is not particularly limited. However, portions to be energized in the first step of the aluminum-plated steel sheet is a portion to be welded in the second step. 　For example, when the mash seam welding in the second step, as shown in FIG. 3A, 3B, current location in the first step is the edge of the steel plate. 3A shows a state of performing a first process on a sheet of aluminum coated steel sheet 10, FIG. 3B shows a state of performing the first step to overlap the two aluminum-plated steel sheets 10 and 20. [0038] (Electrode wheels electrode end face shape) 　shape to be welded in contact with the surface of the electrode wheels used in the first step is not particularly limited, it may be a bevel-shaped, or may be a radius shape. 　The curvature radius of the electrode tip in the case of radius shape is not particularly limited, for example, those of about 8mm is used. 　The driving method of the electrode wheels is not particularly limited, may be a linear by the motor, it may be driven by the work. Include the following are exemplified in the linear system. Drives the electrode shaft directly, is of the knurls drive that drives the upper circumference of the electrode wheel. 　The material of the electrode wheels are each particularly preferably but not limited to, copper alloys. Copper alloys, Cr-Cu and Be-Cu and the like. [0039] (Energization method) 　method of energizing the first step is not particularly limited. The power may be used a DC power source, it may be used an AC power source. In the description of this embodiment, taken as an example the case of the intermittent energization using basically the AC power source may be a continuous energization. [0040] (Conditions: current, pressure, velocity) 　current value is a condition of the first step, pressure and velocity are not particularly limited. 　Current value means the set current value in the welding apparatus. 　Pressure means pressure applied to the workpiece (steel sheet) by a pair of electrode wheels (electrode wheel pairs). 　Speed, along a path, means the rate for relatively moving the electrode wheels pairs relative to the steel plate. [0041] 　(For the second method that is the first step, Figure 2A, 2B, 3B reference) when performing the first step in a state where a plurality of stacked steel plates, a nugget in the first step of binding a plurality of steel plates it is preferred that does not generate. That is, the current value so as not to generate a nugget, it is preferable to set the conditions such as pressure and velocity. This is because, when generating a nugget in the first step, before the aluminum layer is removed is discharged, aluminum aluminum layer enters the nugget, because there may not sufficiently Reducing the aluminum content of the nugget it is. 　However, the first step be one which generates a nugget, included in this disclosure. Instead of aluminum for all aluminum layer is incorporated into the nugget, aluminum part of the aluminum layer is because discharged. [0042] 　Control for the first step does not generate a nugget can be performed by adjusting the current value, pressure, conditions such as speed. In general, each of the conditions shows the following trends. 　Current value is higher and tends to produce a nugget, low and difficult to produce. 　Pressure is less likely to generate a high nugget, easy to produce and low. 　Rate, difficult to produce a high nugget, Yai generates low. [0043] 　The second step, in a laminated state and the aluminum plating layer and another steel plate, a step of welding the energized portion of the aluminum-plated steel sheet in the first step and the other steel plate. 　Since the place where it has been energized in a first step a part of the aluminum layer of the aluminum-plated steel sheets have been removed, the second step, it is possible to form the aluminum content is less weld. Here, the small aluminum content, it is meant that a small aluminum content than welded weld without removing the aluminum layer. [0044] (Welding type) 　types of welding of the second step is not particularly limited, for example, seam welding (lap seam welding, mash seam welding), resistance spot welding, laser welding, arc welding, a variety of welding such as plasma welding it is possible to adopt the kind. 　Because, in the place where it has been energized in the first step a part of the aluminum plating layer has been removed, irrespective of the type of welding of the second step, the aluminum content in the weld, does not perform the first step If to be because it is possible to reduce in comparison. In other words, regardless of the type of welding in the second step, it is possible to obtain a certain effect. 　Note that the "weld" in this disclosure, refers to subsequently solidified portion is melted during welding. For example, in the resistance welding means nugget. Laser welding, arc welding, means a bead in plasma welding. [0045] 　If the type of welding in the second step to the seam welding, aluminum that may be mixed into the weld (nugget) is only aluminum contained in the aluminum layer present on the surface on which the steel sheets are superposed . That is, aluminum aluminum layer present on the surface side of the electrode wheel pair are in contact are not mixed in the nugget. Therefore, the aluminum content of the weld portion (nugget), as compared to welding through the other aluminum-plated steel sheet (for example, laser welding) can be further suppressed. [0046] (Definition of types of welding) 　Note that the seam welding, a disc electrode (roller electrodes, electrode rings) perform pressing and energizing the base material using, along the joint continuously while rotating the electrode means a resistance welding performed (JIS Z 3001-6: 2013). 　Further, the lap seam welding means seam welding to be applied to the superposed joint (JIS Z 3001-6: 2013). 　In addition, the mash seam welding, to half to the plate end of the plate thickness keep overlapping width of about 2-fold, was pressure-energized by the same manner the disc electrode and the lap seam welding, crushed welded joint means a method for continuously welding while (JIS Z 3001-6: 2013 reference). [0047] (Electrode wheels) 　when the type of welding of the second step is seam welding, the electrode wheel pairs used in the second step, to the electrode wheel pairs used in the first step may be used as it is, also, the first step in may use different electrode wheel and the electrode wheel pairs used. [0048] (Energization method) 　If the type of welding of the second step is seam welding, energization method as in the first step is not particularly limited. The method of energizing the second step may be the same as the method of conducting the first step, it may be different. [0049] 　Method for producing a welded joint of the present disclosure can be suitably used in the production of tailored blank. When producing a tailored blank, the type of welding in the second step, for example, the mash seam welding is used as shown in FIG. 4A, 4B. Figure 4A, in a case of mash seam welding in the second step, and shows a state in which overlapping edge portions of the steel plates prior to welding. Figure 4B shows the weld joint after the mash seam welding in the second step together with the electrode wheels pairs. [0050] 　in Figure 5A, showing a weld joint T produced by the production method of the welded joint according to an embodiment of the present disclosure. Specifically, it shows how the type of welding in the second step is a welded joint T when it is seam welded (lap seam weld) along a cross section perpendicular to the seam welding line. [0051] 　As shown in FIG. 5A, the welded joint T, nugget 30 to couple an aluminum-plated steel sheet 10 and the aluminum-plated steel sheet 20 are formed. In other words, the nugget 30, and the aluminum-plated steel sheet 10 and the aluminum-plated steel sheets 20 are connected are overlapped. [0052] 　In the method of manufacturing the welded joint of the present embodiment, in the first step removes a portion of the aluminum layer of the aluminum-plated steel sheets 10 and 20. In the second step, a portion where a part of the aluminum layer is removed by superimposing with other steel seam welded. The seam welded parts can nugget. 　Since the portion of the aluminum layer is removed, welded at joint T, the aluminum content of the nugget 30, in the case of aluminum in the aluminum layer which is present in the superimposed side is assumed that all entered the nugget 30 aluminum which is less than the content. 　In other words, the aluminum content of the nugget 30 per unit area when viewed from a direction perpendicular to the surface of the aluminum-plated steel sheet, than the aluminum content per unit area of the aluminum layer present on the superimposed side running low. 　Further in other words, the aluminum content in the nugget of unit length, superimposed unit length and nugget corresponding width and multiplying the area region (the direction perpendicular to the surface of the nugget aluminum-plated steel sheet of the unit length of the surfaces which is less than the aluminum content of the aluminum layer present on the area region) when viewed from. [0053] 　This will be another description with reference FIG. 5A, the 5B. 　Figure 5A, the area when viewed from a direction perpendicular to the surface of the aluminum-plated steel sheets 10, 20 S (mm as shown in 5B 2 aluminum content in the nugget 30) 2 to aluminum layer 14B of the steel plate 10, 20 with each other in) is present on the side superimposed, the aluminum content of 24A and B (g). 　In this case, A / S (mg / mm 2 )