CN103381658A - 纤维强化树脂与金属的接合构造及接合方法 - Google Patents

纤维强化树脂与金属的接合构造及接合方法 Download PDF

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Publication number
CN103381658A
CN103381658A CN2013100674531A CN201310067453A CN103381658A CN 103381658 A CN103381658 A CN 103381658A CN 2013100674531 A CN2013100674531 A CN 2013100674531A CN 201310067453 A CN201310067453 A CN 201310067453A CN 103381658 A CN103381658 A CN 103381658A
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aforementioned
reinforced resin
fiber
metal material
resin composite
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CN103381658B (zh
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长田保
生出理子
长山隆弘
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Subaru Corp
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Fuji Heavy Industries Ltd
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    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/06—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by features of form at particular places, e.g. in edge regions for securing layers together; for attaching the product to another member, e.g. to a support, or to another product, e.g. groove/tongue, interlocking
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
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    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • B29C66/7422—Aluminium or alloys of aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/19—Sheets or webs edge spliced or joined
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    • Y10T428/195—Beveled, stepped, or skived in thickness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
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Abstract

防止热硬化时流出的树脂进入金属材料的整个层间，实现高品质化。在纤维强化树脂与金属的接合构造中，将由金属材料和纤维强化树脂复合材料构成的要素作为一片，以阶梯状构造在厚度方向重叠的方式层叠多片，将金属材料和纤维强化树脂复合材料粘合，并且相邻的要素之间在重叠面处接合，该金属材料形成使构成阶梯状接合面的端部随着朝向该端部的端面方向而阶段性地变薄的阶梯状构造，该纤维强化树脂复合材料利用端部将阶梯状构造上方平坦地填充而进行层叠。在金属材料的外端部形成对相邻的金属材料的接合面进行焊接而接合的主焊接部。在与主焊接部相比的纤维强化树脂复合材料侧，形成在厚度方向上将所有的金属材料进行焊接而成的副焊接部。

Description

纤维强化树脂与金属的接合构造及接合方法
技术领域
本发明涉及纤维强化树脂与金属的接合。
背景技术
当前，纤维强化树脂复合材料（FRP：Fiber Reinforced Plastics）作为飞机、汽车、船舶或一般工业机器的构造用部件而广泛使用。例如，已知一种纤维强化树脂复合材料，其在将碳纤维或玻璃纤维等无机物类强化纤维纵横配置而织入的织物中，浸渍硬化环氧树脂等树脂而形成。
但是，不利用纤维强化树脂复合材料构成整个部件，而必须在一部分中使用金属材料的情况也很多。
因此，将纤维强化树脂复合材料与金属材料高强度地接合成为课题。当前，如专利文献1～3所述，提出下述技术，其通过将纤维强化树脂复合材料与金属材料直接粘合，去除连结件而实现轻量化等。
在通过粘合将两个部件接合时，将两个部件的端面之间对接，在仅将该对接面作为粘合面的情况下，粘合面较小，不能期待高强度的接合构造。
在专利文献1记载的接合构造中采用阶梯状接合面，即，分别在两个部件要接合的端部形成互补的阶梯状构造，在与对接面垂直的阶梯面上确保大面积的接合面。
在专利文献2记载的接合构造中，在管材中采用多段阶梯状接合面。另外，在专利文献2中记载阶梯状接合面重叠为两层的构造（参照该文献第3图）。这是在开口于纤维强化树脂复合材料的端面上且内侧较窄的阶梯状槽中，插入前端较细的阶梯状的金属材料的端部的构造。
在专利文献3记载的接合构造中，在轴材料中，通过使轴端倾斜，将纤维强化树脂复合材料与金属材料部分重叠地配置并卷绕，在通过该轴的剖面上使两种材料交替重叠而形成多层。
但是，根据专利文献3记载的技术，即使可以将两种材料交替重叠地形成多层，也仅能构成轴状的管材，无法构成具有平面或任意曲面的构造。另外，无法形成阶梯状、特别是多段的阶梯状接合面。并且，伴随着卷绕，两种材料重叠的区域逐渐偏离轴向，该区域变长。在用于接合的构造部上很难同时形成其他构造。如果用于接合的构造变大，则相应地设计自由度受到较大限制，或者使用部位受限，因此不优选。
在专利文献1记载的技术中，是由一层纤维强化树脂复合材料和一层金属材料重叠而形成的接合构造。在专利文献2记载的技术中，金属材料并不是大于或等于两层。
因此，在上述的现有技术中，很难利用将纤维强化树脂复合材料及金属材料分别交替地重叠两层或多于两层的构造，构成具有平面或任意曲面的形状，对于在所要求的总厚度内使各层的层厚更薄、更多层化自然产生局限。
由此，本发明人开发了纤维强化树脂与金属的接合构造100，该构造例如如图8所示，将由金属材料101和纤维强化树脂复合材料102构成的要素103作为一片，将该要素103层叠而成，该金属材料101形成使构成阶梯状接合面的端部随着朝向该端部的端面方向而阶段地变薄的阶梯状构造，该纤维强化树脂复合材料102进行层叠，以利用端部将阶梯状构造平坦地填充。由于成为这种接合构造，因此当然会使阶梯状接合面多段化，即使在很薄的总厚度内，也可以容易地使经由阶梯状接合面交替地重叠的纤维强化树脂层及金属层多层化。
并且，本发明人为了提高接合强度，还研究了下述技术，即，在使各要素103热硬化而将金属材料101和维强化树脂复合材料102粘合后，对相邻的金属材料101之间进行焊接，在每个接合面上形成焊接部104。
专利文献1：日本实开昭63－178126号公报
专利文献2：日本特公昭61－009135号公报
专利文献3：日本特开2001－032819号公报
但是，如果成为图8所示的接合构造100，则在使多片层叠的要素103热硬化时，从纤维强化树脂复合材料102中流出的树脂会进入整个层间，担心在将金属材料101之间进行焊接时产生气孔等缺陷。
发明内容
因此，本发明的课题是：防止热硬化时流出的树脂进入金属材料的整个层间，可以实现高品质化。
用于解决上述课题的技术方案1所述的发明，是一种纤维强化树脂与金属的接合构造，其将纤维强化树脂复合材料与金属材料的端部之间经由阶梯状接合面接合，
其特征在于，
将由形成为阶梯状构造的金属材料和纤维强化树脂复合材料构成的要素作为一片，以前述阶梯状构造在厚度方向重叠的方式层叠多片，其中，上述金属材料的阶梯状构造是使构成前述阶梯状接合面的端部随着朝向该端部的端面方向而阶段性地变薄的构造，上述纤维强化树脂复合材料进行层叠，以利用端部将前述阶梯状构造平坦地填充，
将前述金属材料和纤维强化树脂复合材料粘合，并且相邻的前述要素之间在重叠面处接合，
在前述金属材料的外端部形成主焊接部，其对相邻的前述金属材料的接合面进行焊接而接合，
在前述层叠的多个前述要素的所有前述金属材料上，在与前述主焊接部相比的前述纤维强化树脂复合材料侧形成副焊接部，其是在前述厚度方向上将前述所有的前述金属材料进行焊接而成。
技术方案2所述的发明，提供一种纤维强化树脂与金属的接合方法，其将纤维强化树脂复合材料与金属材料的端部之间经由阶梯状接合面接合，
其特征在于，
使构成前述阶梯状接合面的金属材料的端部，形成随着朝向该端部的端面方向而阶段性地变薄的阶梯状构造，
层叠纤维强化树脂复合材料，以利用其端部将前述阶梯状构造上方平坦地填充，
将由一片前述金属材料、和以将阶梯状构造上方填充的方式层叠的前述纤维强化树脂复合材料构成的要素作为一片，以前述阶梯状构造在厚度方向重叠的方式层叠多片，在该状态下，从前述层叠的多片前述要素的前述金属材料侧的外端部开始隔着规定的间隔，在前述厚度方向上将前述多片前述要素的所有前述金属材料进行焊接而形成副焊接部，
通过使前述纤维强化树脂复合材料热硬化，从而将前述金属材料和纤维强化树脂复合材料粘合，并且将相邻的前述要素之间在重叠面处接合，
然后，在相邻的前述金属材料的外端部，形成对相邻的前述金属材料的接合面进行焊接而接合的主焊接部。
发明的效果
根据本发明，由于在层叠的多片要素的所有金属材料上，在与主焊接部相比的纤维强化树脂复合材料侧，形成在厚度方向上将所有的金属材料进行焊接的副焊接部，因此，通过在热硬化之前形成该副焊接部，可以利用副焊接部阻止因热硬化而从纤维强化树脂复合材料熔化的树脂进入金属材料的外端部。由此，可以防止热硬化时流出的树脂进入金属材料的整个层间，从而可以实现高品质化。
附图说明
图1是本发明的一个实施方式涉及的纤维强化树脂与金属的接合构造的剖面图。
图2是本发明的一个实施方式涉及的纤维强化树脂与金属的接合构造的一片要素的剖面图。
图3是本发明的一个实施方式涉及的纤维强化树脂与金属的接合构造，是表示将一片要素层叠多片的状态的剖面图。
图4是本发明的一个实施方式涉及的纤维强化树脂与金属的接合构造，是表示将层叠的多片要素全部进行焊接时的形态的剖面图。
图5是本发明的一个实施方式涉及的纤维强化树脂与金属的接合构造，是表示焊接后进行热硬化时的形态的剖面图。
图6是表示本发明的一个实施方式涉及的纤维强化树脂与金属的接合构造中的层间焊接的形态的剖面图。
图7是表示本发明的一个实施方式涉及的纤维强化树脂与金属的接合构造中的端面焊接的形态的剖面图。
图8是现有的纤维强化树脂与金属的接合构造的剖面图。
标号的说明
1  接合构造
10 一片要素
11 金属材料（金属箔）
12 纤维强化树脂复合材料
13 纤维强化树脂复合材料
14 纤维强化树脂复合材料
15 纤维强化树脂复合材料
16 主焊接部
17 副焊接部
21 金属部件
23 焊合部
具体实施方式
下面，参照附图对本发明的一个实施方式进行说明。以下是本发明的一个实施方式，并不是限定本发明。
如图1所示，本实施方式的纤维强化树脂与金属的接合构造1，是将在图2中以单体表示的一片要素10层叠多片而构成的。
一片要素10由金属材料（金属箔）11和纤维强化树脂复合材料12～15构成。金属材料11和纤维强化树脂复合材料12～15经由阶梯状接合面粘合，各要素10、10之间在其重叠面处接合。
并且，如图1所示，在接合构造1中的金属材料11的外端部形成主焊接部16，其将相邻的金属材料11的接合面进行焊接而接合。另外，在层叠的多片要素10的所有金属材料11上，在与主焊接部16相比的纤维强化树脂复合材料12～15侧，形成副焊接部17，其是在厚度方向上将所有的金属材料11进行焊接而形成的。
在这里，按照制造过程进行说明，从而对纤维强化树脂与金属的接合方法进行说明。
首先，如图2所示，使金属材料11的端部11a形成随着朝向其端面方向而阶段性地变薄的阶梯状构造。
然后，在金属材料11的阶梯状构造的端部11a上，依次层叠在纤维中浸渍基体树脂而成的预浸渍体状态的纤维强化树脂复合材料12～15。
纤维强化树脂复合材料12～15，按照与端部11a的各段相对应的部分简单地划分。纤维强化树脂复合材料12～15，分别由一片或多片预浸渍体构成。
在层叠时，首先，使纤维强化树脂复合材料12与端部11a的端面对接。将纤维强化树脂复合材料13的端部配置在与纤维强化树脂复合材料12的端部相比向金属材料11的最厚部11b侧偏移的位置上，利用纤维强化树脂复合材料13的端部，将第1阶梯面11c上方平坦地填充而进行层叠。相同地，将纤维强化树脂复合材料14的端部配置在与纤维强化树脂复合材料13的端部相比向金属材料11的最厚部11b侧偏移的位置上，利用纤维强化树脂复合材料14的端部，将第2阶梯面11d上方平坦地填充而进行层叠。相同地，将纤维强化树脂复合材料15的端部配置在与纤维强化树脂复合材料14的端部相比向金属材料11的最厚部11b侧偏移的位置上，利用纤维强化树脂复合材料15的端部，将第3阶梯面11e上方平坦地填充而进行层叠。此外，也可以在与纤维强化树脂复合材料12～15接触的金属材料11的阶梯状构造的表面上涂敷胶状粘合剂或层叠片状粘合剂，之后层叠纤维强化树脂复合材料12～15。
将上述的要素10如图3所示，以使阶梯状构造在厚度方向上重叠的方式，得到层叠多片的状态。另外，也可以将要素10制作必要片数，如图3所示，以使阶梯状构造在厚度方向上重叠的方式，得到层叠多片的状态。
在图3中示出了阶梯状接合面的形成长度L。
在将要素10进行层叠时，也可以适当改变要素10的正反面，但优选如图3所示，在阶梯状构造的形成区域内，将金属材料11、11配置在整体的正反面、即两个外表面上。将金属面作为外表面是为了较强地抵抗来自外部的冲击。
另外，优选配置为，使各要素10、10、10…的阶梯状构造的两端位置一致。这是为了使阶梯状接合面的形成长度L缩短。
然后，如图4所示，在从层叠的多片要素10的金属材料11侧的外端部开始隔着规定间隔H的位置上，将多片要素10的所有金属材料11在厚度方向上进行焊接而形成副焊接部17。在此过程中，如箭头18所示，使激光等焊接热源从金属材料11的表面侧及背面侧中的至少一侧朝向金属材料11沿厚度方向入射，在厚度方向上将所有的金属材料11进行焊接而形成副焊接部17。在图中表示了接合构造1的剖面图，但优选副焊接部17相对于形成接合构造1的板材的边连续地形成，严格地说，相对于与金属材料11和纤维强化树脂复合材料12～15的接合面相向的边而连续地形成。
此外，焊接热源的照射方向，根据接合构造1的厚度，适当地选择仅从一面侧照射、或从表面侧及背面侧这两面侧照射。
在副焊接部17形成后，如图5所示，在将要素10层叠多片的状态下，使各要素10的纤维强化树脂复合材料12～15热硬化。
由此，金属材料11和纤维强化树脂复合材料12～15接合，并且所有的纤维强化树脂复合材料12～15成为一体。另外，热硬化时从纤维强化树脂复合材料12～15流出而进入金属材料11、11的层间的树脂，由副焊接部17阻止其向外端部侧移动。
然后，如图6所示，从金属材料11、11的外端部侧将相邻的金属材料11、11的接合面进行焊接而形成主焊接部16。在此过程中，如箭头20所示，使激光等焊接热源从外端面朝向金属材料11、11的接合面，与接合面平行地入射直至每个接合面上很深的位置，形成主熔接部16。
根据需要，在利用研磨等将形成主熔接部16的端面进行整形后，如图7所示，使金属部件21的端面与该整形后的端面对齐，利用焊接进行接合。此时，如箭头22所示，也使激光等焊接热源朝向金属材料11和金属部件21的接合面，与接合面平行地入射，直至很深的位置，形成熔接部23。
从上述的制造过程可知，本实施方式的纤维强化树脂与金属的接合构造1，是纤维强化树脂复合材料与金属材料的端部之间经由阶梯状接合面接合的纤维强化树脂与金属的接合构造，其构成为，将由形成为阶梯状构造的金属材料11和纤维强化树脂复合材料12～15构成的要素10作为一片，以使阶梯状构造在厚度方向重叠的方式层叠多片，其中，该金属材料11的阶梯状构造是使构成阶梯状接合面的端部随着朝向该端部的端面方向而阶段性地变薄的构造，该纤维强化树脂复合材料12～15进行层叠，以利用端部将该阶梯状构造上方平坦地填充，将金属材料11和纤维强化树脂复合材料12～15粘合，并且相邻的要素10之间在重叠面处接合，在金属材料11的外端部形成主焊接部16，其将相邻的金属材料11的接合面进行焊接而接合，在层叠的多片要素10的所有金属材料11上，在与主焊接部16相比的纤维强化树脂复合材料12～15侧形成副焊接部17，其是在厚度方向上将所有的金属材料11进行焊接而形成的。
如上述所示，根据本实施方式，由于在层叠的多片要素10的所有金属材料11上，在与主焊接部16相比的纤维强化树脂复合材料12～15侧，形成在厚度方向上将所有的金属材料11进行焊接的副焊接部17，因此，通过在热硬化之前形成该副焊接部17，从而可以利用副焊接部17阻止因热硬化而从纤维强化树脂复合材料12～15流出的树脂进入金属材料11的外端部。由此，可以防止热硬化时流出的树脂进入金属材料11的整个层间，从而可以实现高品质化。
另外，在由多片要素10构成的板材为平板的情况下，在热硬化之前或热硬化时各要素10产生错位的可能性较小，但如果是弯曲的形状，则在热硬化之前或热硬化时产生错位的可能性会升高。如果如本实施方式所示，在热硬化之前形成副焊接部17，则可以利用副焊接部17将多片要素10临时固定，从而可以防止错位。
另外，在上述实施方式中，使各阶梯状构造形成3段，但这仅是一个例子。优选阶梯状构造为大于或等于2段的多段。这是因为，在经由阶梯状接合面的接合构造中，应力会集中在各阶梯的端部。通过使阶梯状构造形成更多段数，可以使应力集中分散，减小最大应力。
在上述的实施方式中，使要素10的层叠片数为5片，但这仅是一个例子。优选大于或等于3片，并如上所述在两个外表面配置金属面。
通过使要素10的层叠片数增多，纤维强化树脂复合材料和金属材料的粘合面积扩大，即使将阶梯状接合面的形成长度L缩短，也可以确保充分的接合强度。如图7所示，在100%金属的端部的尺寸L1因上述焊接等原因而具有一定距离即可的情况下，通过缩短阶梯状接合面的形成长度L，可以提高纤维强化树脂复合材料的容积占有率，从而可以实现轻量化等。
另外，由于纤维强化树脂复合材料和金属材料的粘合面积扩大，因此纤维强化树脂复合材料和金属材料之间的导电性也提高。
在现有的具有阶梯状接合面的接合构造中，由于阶梯状接合面为1层或2层，因此，如果受到冲击载荷或拉伸·压缩、弯曲等重复载荷，在1层阶梯状接合面上产生剥离，则会完全分裂或剥离至大致一半而破坏。
与此相对，如果利用本接合构造1，则成为多层化，粘合面积扩大，由于从距外表面较浅的位置至较深的位置，分散地配置由与外表面平行的阶梯面形成的粘合面，因此即使在相同载荷条件下也不会产生剥离，或者可以仅为外表面的一部分剥离。因此，优选使要素10为3层、4层、5层…，将其层叠数增多。
关于适用的纤维强化树脂复合材料，可以例举碳纤维强化树脂复合材料、玻璃纤维强化树脂复合材料等，但不限制其种类。
关于适用的金属材料的材质，可以例举Ti合金、Al合金、Mg合金等，但也不限制其种类。关于适用的树脂，只要是热硬化树脂即可，也不限制其种类。

Claims (2)

1.一种纤维强化树脂与金属的接合构造，其将纤维强化树脂复合材料与金属材料的端部之间经由阶梯状接合面接合，
其特征在于，
将由形成为阶梯状构造的金属材料和纤维强化树脂复合材料构成的要素作为一片，以前述阶梯状构造在厚度方向重叠的方式层叠多片，其中，上述金属材料的阶梯状构造是使构成前述阶梯状接合面的端部随着朝向该端部的端面方向而阶段性地变薄的构造，上述纤维强化树脂复合材料进行层叠，以利用端部将前述阶梯状构造上方平坦地填充，
将前述金属材料和纤维强化树脂复合材料粘合，并且相邻的前述要素之间在重叠面处接合，
在前述金属材料的外端部形成主焊接部，其对相邻的前述金属材料的接合面进行焊接而接合，
在前述层叠的多个前述要素的所有前述金属材料上，在与前述主焊接部相比的前述纤维强化树脂复合材料侧形成副焊接部，其是在前述厚度方向上将前述所有的前述金属材料进行焊接而成。
2.一种纤维强化树脂与金属的接合方法，其将纤维强化树脂复合材料与金属材料的端部之间经由阶梯状接合面接合，
其特征在于，
使构成前述阶梯状接合面的金属材料的端部，形成随着朝向该端部的端面方向而阶段性地变薄的阶梯状构造，
层叠纤维强化树脂复合材料，以利用其端部将前述阶梯状构造上方平坦地填充，
将由一片前述金属材料、和以将阶梯状构造上方填充的方式层叠的前述纤维强化树脂复合材料构成的要素作为一片，以前述阶梯状构造在厚度方向重叠的方式层叠多片，在该状态下，从前述层叠的多片前述要素的前述金属材料侧的外端部开始隔着规定的间隔，在前述厚度方向上将前述多片前述要素的所有前述金属材料进行焊接而形成副焊接部，
通过使前述纤维强化树脂复合材料热硬化，从而将前述金属材料和纤维强化树脂复合材料粘合，并且将相邻的前述要素之间在重叠面处接合，
然后，在相邻的前述金属材料的外端部，形成对相邻的前述金属材料的接合面进行焊接而接合的主焊接部。
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