201201947 六、發明說明： 【發明所屬之技彳軒領域】 發明領域 本發明係有關於一種具有耐脆性裂痕傳播性之熔接構 造體，能在熔接接頭發生脆性裂痕時，抑制並控制脆性裂 痕之傳播。 特別是有關於一種具有耐脆性裂痕傳播性之熔接構造 體’即便在使用厚鋼板而運用熔接之熔接構造物之熔接接 頭上發生脆性裂痕時，亦能控制並抑制脆性裂痕，提昇安 全性。 L先前冬好；j 發明背景 近年來’對於大型貨櫃船或散裝貨船等之船舶用熔接 構造體、建築構造物、土木鋼構造物所代表之熔接構造體， 已要求對於脆性裂痕等破壞之高度安全性。尤其貨櫃船之 大型化很明顯，例如已演變成製造出達6000TEU以上之大 型貨櫃船’船殼外板之鋼板加厚並高強度化，已使用有板 厚70mm以上且降伏強度390N/mm2級以上之鋼板。 在此，TEU(Twenty feet Equivalent Unit)係指換算成長 度20呎的貨櫃之個數，表示貨櫃船之承載能力之指標。 如此大型貨櫃船為了提昇承載能力或貨物裝卸效率積 載能力，因此形成一種將隔間壁去除’且加大上部開口部 來予以確保之構造，尤其有必要確保船殼外板或内板之強 度’因此使用如上述之高強度鋼板。 201201947 在建造如上述般之熔接構造物之際，以減少建造成本 或提昇建造效率為目的，廣泛地適用在高入熱量(high heat input)熔接（例如’電氣電弧炫接（eiectr0gas arc welding))。 在適用低入熱量時之多層覆板熔接中，特別是，鋼板之板 厚愈增加’熔接工時愈顯著增加，而要求以高入熱量進行 熔接直至極限。 惟，在鋼板之熔接適用高入熱量熔接時，由於降低熔 接熱影響部(HAZ : Heat Affected Zone)之勒性，HAZ之寬度 亦大增，因此處於相對於脆性破壞之破壞韌性值降低之趨 勢。 為此，以抑制在熔接接頭中發生脆性裂痕，並達成脆 性裂痕之傳播停止(arrest)者為目的，乃提案一種封脆性破 壞特性優異之 TMCP 鋼板（Thermo Mechanical Control Process :熱加工控制）。因為藉使用上述TMCP鋼板，提高 對於脆性破壞發生之抵抗值之破壞韌性值，在通常的使用 環境中，使構造物遭到脆性破壞之可能性變得極低。 惟，在地震或有構造物彼此相撞之事故或災害等之 際，萬一發生脆性破壞，就有脆性裂痕傳播HAZ，而有產 生很大的破壞之虞。 例如，在以貨櫃船等為代表之熔接構造體中，可想到 的是使用板厚50mm程度之TMCP鋼板等之時，萬一就算在 炼接接頭發生脆性裂痕，亦經由炫接殘留應力，使脆性裂 痕從溶接部逃逸至母材側，因此如果能確保母材之停止性 能，就能將脆性裂痕停止在母材。又，在超過6000TEU之 4 201201947 大型貨櫃船等更大型的熔接構造體中，需要板厚更大之鋼 板，進而，為了將構造簡化，所以鋼板之厚壁化乃為有效， 因此變成需要使用設計應力高之高張力鋼之厚鋼板。 惟，在使用如此厚鋼板時，依照HAZ之破壞韌性之裎 度，亦有如下之虞，即，使脆性裂痕不會逃逸到母材且沿 著HAZ傳播下去，對炫接構造物造成很大的破壞者。 為解決上述問題’而有一種熔接構造體之提案，該炫 接構造體之構成為：在對接熔接接頭之一部分實施補修熔 接(對於接頭之一部分進行懸吊，在該處進行回填熔接），將 沿著HAZ傳播之脆性裂痕逃逸到母材側者（例如專利文獻 1)。 惟，在專利文獻1之熔接構造體中，在母材之破壞韌性 極為優異時為有效，但母材之破壞韌性不足時，逃逸至母 材側之脆性裂痕傳播很遠，而有作為構造物之強度顯著降 低之虞。又，回填熔接部之體積變大，而有使工程時間拉 長，並使製造成本增加之問題衍生。 又’有一種熔接構造體之提案，其係於欲將熔接接頭 所發生之脆性裂痕之傳播停止之區域上，貫穿溶接板狀之 制動（arrestor)構件且使其與熔接線交又，其中作為制動 材’是使用將表面或背面之板厚比2%以上之厚度之表層區 中之集合組織適當化之物（例如專利文獻2)。 惟’將專利文獻2所載之熔接構造體適用在大型建造物 時，則有如下之虞，例如傳播在熔接接頭之脆性裂痕係傳 播在將制動構件熔接在鋼板之熔接接頭而侵入制動構件， 201201947 就這樣傳播在制動構件之内部之後，再次__接接 頭。此外，在熔接接頭傳播之脆性裂痕係於制動構件及將 *玄制動構件熔接在鋼板之熔接接頭之位置上逃逸到母材側 時’與上述同樣，母材之破壞_性不《，就造成脆性裂痕 傳播地很長，亦擔心有使得作為熔接構造物之強度明顯地 降低之問題衍生。 先行技術文獻 專利文獻 專利文獻1:曰本發明專利申請案公開公報第2005_1317〇8號 專利文獻2 :日本發明專利申請案公開公報第2〇〇7_〇98441號 C 明内3 發明概要 本發明係有鑑於上述問題而所創建者，其目的係於提 供一種具有耐脆性裂痕傳播性之熔接構造體，藉此，即使 在熔接接頭上發生脆性裂痕時，亦可抑制脆性裂痕傳播到 熔接接頭或母材，能防止熔接構造體之斷裂。 本發明人乃為了防止炫接構造體之炼接接頭所發生之 脆性裂痕傳播至熔接接頭或母材，而針對在熔接接頭的中 間設置如專利文獻2般之控制脆性裂痕傳播之停止構件之 形態予以精心研究。 結果發現.藉將制動構件之形狀或材質特性適當化， 抑制熔接接頭及母材中之脆性裂痕之傳播，可防止在熔接 構造體發生大規模的破壞者；而完成本發明。 即，本發明之旨趣係有關於申請專利範圍所記載之以 201201947 下之内容。 [1] 一種具有耐脆性裂痕傳播性之熔接構造體，係將鋼 板對接溶接而形成鋼板，熔接接頭而構成者，其特徵在於： 在前述鋼板熔接接頭之至少一處設有停止鋼板熔接接 頭所產生之脆性裂痕之傳播之耐裂痕控制部， 該耐裂痕控制部具有：制動構件，係由脆性裂痕傳播 停止特性Kca為όΟΟΟΝ/ππη1 5以上之鋼材所構成，插入於由 前述鋼板熔接接頭跨越至前述鋼板所形成之貫通穴者；及 制動炼接接頭，係使該制動構件之外緣部和與其相對之鋼 板母材對接熔接而形成者， 前述制動構件係將沿著前述鋼板熔接接頭之長向之高 度H(mm)、與鋼板溶接接頭之長向交叉之方向中之橫向寬 度W(mm)、及板厚t(mm)之每一尺寸滿足下述⑴〜(3)式所示 之關係， 2T ^ H --.(1) 3.2d+50 ^ W · · · (2) 0.90T ^ t · · · (3) 惟，在上述(1)〜(3)式中，T表示前述鋼板之板厚(mm)， d表示前述鋼板熔接接頭中之熔接金屬部之寬度(mm)， 且，該制動構件之外緣部係形成為在前述鋼板熔接接 頭之長向前後中’相對於前述長向以60。以上且120。以下之 範圍之角度而與前述鋼板溶接接頭交叉者。 [2] 如上述[1]所記載之具有耐脆性裂痕傳播性之熔接 構造體，其中表示前述制動熔接接頭中之熔接金屬部之韌 201201947 性之脆性一延性破裂（fracture)轉移溫度vTrS3fC )、與表示 前述鋼板之母材韌性之脆性一延性破裂轉移溫度vTrS丨（。〇) 之關係滿足下式vTrS3 S vTrS 1 + 20所示之關係。 [3]如上述[1 ]或[2]所s己載之具有对脆性裂痕傳播性之 熔接構造體，其1ί7前述鋼板之板厚為25mm以上且150mm以 下。 [4] 如上述[1 ]〜[3]中任一項所記載之具有耐脆性裂痕傳 播性之熔接構造體，其中前述鋼板係由排列在前述鋼板熔 接接頭之長向之至少2個以上之小鋼板所構成，並且將該等 小鋼板對接炫接而形成小鋼板炼接接頭，前述财裂痕控制 部係設成’由前述溶接金屬部延伸之制動構件之後端部側 所形成之前述制動熔接接頭與前述小鋼板熔接接頭相接 者。 [5] 如上述[Π〜[3]中任一項所記載之具有耐脆性裂痕傳 播性之熔接構造體，其中前述鋼板係由排列在前述鋼板熔 接接頭之長向之至少2個以上之小鋼板構成，並且，將該等 小鋼板對接熔接而形成小鋼板熔接接頭，前述耐裂痕控制 部係設置成’由前述熔接金屬部延伸之制動構件之後端部 側所形成之前述制動熔接接頭含有前述小鋼板熔接接頭 者，進而，表示形成前述小鋼板熔接接頭之熔接金屬部之 韌性之脆性一延性破裂轉移溫度vTrS4(t)、與表示前述鋼 板之母材韌性之脆性—延性破裂轉移溫度vTrSirC)間之關 係滿足下式之關係： vTrS4 ^ vTrSl + 20 。 8 201201947 又，在本發明中，將含有熔接金屬部及熔接熱影響部 刀疋義為溶接接頭。又，脆性裂痕傳播停止特性Kca 係該炫接構造體所使用之溫度或設計溫度之數值。 發明之效果 依本發明之炼接構造體，在炼接接頭之至少一處設置 耐裂痕控制部，該耐裂痕控制部具有制動構件、及形成在 制動構件與母材鋼板之間之制動熔接接頭，因此即使在熔 接接頭發生有脆性裂痕時，藉耐裂痕控制部，將傳播在熔 接接頭之脆性裂痕移轉到鋼板母材之停止性能高之部位， 或者是可在_痕控制針以阻止，可抑制脆性㈣傳播 在炫接接頭或母材者。因此，可以高生纽率及低成本得 到溶接構造體，雜接構造财將發生大規模的破壞防範 於未然者。 如此本發明之炫接構造體，以大型船舶為首，使用在 建築構造物或土木鋼構造物等之各猶接構造物，能同時 滿足炼接構造物之A型化、對於破壞之高安純、建造上, 之熔接之高效率化、鋼材之輯料方面，因此其產業上 的效果無可估量。 、μ 圖式簡單說明 第Ua)〜_係說明本發明之模式圖，⑷顯示將鋼板彼 此炼接而形成之鋼板炫接接頭之_部分上設有由制動構件 及制祕接接頭所構成之耐裂痕控制部之狀態，(鴨 不脆性裂痕之進展狀況。 顯 第2圖係說明本發明之轉構造體之—例之模式圖 201201947 示在鋼板雜接頭之-部分設有由制動構件及制動炼接接 頭所構成之对裂痕控制部之狀態之俯視圖。 第3圖係針對將本發明之炫接構造體運用在船舶用溶 接構造體之形態予以說明之概略圖。 第4圖係說明本發明之炼接構造體之另—例且與第2圖 同樣之圖。 第5圖係說明本發明之熔接構造體之另_例且與第2圖 同樣之圖。 第6(a)〜(c)圖係針對本發明實施例所使用之熔接接頭 測試體之製造方法予以說明之圖。 第7(a)〜(c)圖係針對用以評價本發明實施例中之耐脆 性裂痕傳播性之抗拉試驗方法予以說明之圖。 【實方包方式J 較佳實施例之詳細說明 以下，一邊參考附圖’一邊就本發明之具有耐脆性裂 痕傳播之熔接構造體之實施形態予以詳細說明。此外，本 實施形態係為了更理解發明之旨趣之形態，只要是在沒有 特別指定外，並不是限定本發明者。 迄今，在鋼板熔接接頭中所產生之脆性裂痕，主要是 在鋼板熔接接頭之長向傳播。為此，在鋼板熔接接頭所產 生之脆性裂痕成為起點’有在熔接構造體整體發生很大破 壞之虞之問題衍生。 本發明人係知見：為了有效控制如上述般之脆性裂痕 之傳播方向，在熔接構造體中裂痕傳播之情形，在上述習 201201947201201947 VI. Description of the Invention: [Technical Field of the Invention] Field of the Invention The present invention relates to a welded structure having brittle-resistant crack propagation property, which can suppress and control the propagation of brittle cracks when a brittle crack occurs in a welded joint . In particular, a welded structure having a brittle-resistant crack propagation property can control and suppress brittle cracks and improve safety even when brittle cracks occur on a welded joint of a welded structure using a thick steel plate. In the past, in recent years, the welding structure represented by a ship for a large container ship or a bulk cargo ship, a building structure, and a welded structure represented by a civil steel structure has been required to have a high degree of damage to brittle cracks and the like. safety. In particular, the enlargement of container ships is obvious. For example, the large-sized container ships that have been manufactured to produce more than 6000 TEUs have thickened and high-strength steel plates. The plate thickness is 70 mm or more and the drop strength is 390 N/mm2. The above steel plate. Here, TEU (Twenty Fee Equivalent Unit) refers to the number of containers with a conversion length of 20呎, which is an indicator of the carrying capacity of the container ship. In order to improve the load carrying capacity or cargo handling efficiency stowage capacity of such a large container ship, a structure is formed which removes the partition wall and enlarges the upper opening portion, and it is particularly necessary to ensure the strength of the outer or inner hull of the hull. Therefore, a high-strength steel sheet as described above is used. 201201947 In the construction of the welded structure as described above, it is widely used for high heat input welding (for example, 'eiectr0gas arc welding') for the purpose of reducing construction cost or improving construction efficiency. . In the multi-layer superstrate welding in which low heat input is applied, in particular, the plate thickness of the steel plate increases. The welding work time increases remarkably, and it is required to weld to a limit with high heat input. However, when the welding of the steel sheet is applied to the high heat fusion welding, the width of the HAZ is greatly increased due to the reduction of the resistance of the heat affected zone (HAZ: Heat Affected Zone), so the fracture toughness value with respect to the brittle fracture is lowered. . For this reason, a TMCP steel sheet (Thermo Mechanical Control Process) having excellent sealing and breaking properties has been proposed for the purpose of suppressing the occurrence of brittle cracks in the welded joint and achieving the propagation of brittle cracks. Since the above-mentioned TMCP steel sheet is used to increase the fracture toughness value of the resistance value to the occurrence of brittle fracture, the possibility of brittle fracture of the structure is extremely low in a normal use environment. However, in the event of an earthquake or an accident or disaster in which structures collide with each other, in the event of brittle fracture, there is a brittle crack that propagates HAZ, and there is a great deal of damage. For example, in a welded structure represented by a container ship or the like, it is conceivable that when a TMCP steel sheet having a thickness of about 50 mm is used, even if a brittle crack occurs in the welded joint, the residual stress is caused by the dazzle. The brittle crack escapes from the welded portion to the side of the base material, so that the brittle crack can be stopped in the base material if the stopping property of the base material can be ensured. In addition, in a larger welded structure such as a large container ship of more than 6,000 TEUs, it is necessary to use a steel plate with a larger thickness. Thick steel plate with high tensile strength and high tensile steel. However, when such a thick steel plate is used, according to the degree of fracture toughness of the HAZ, there is also a problem that the brittle crack does not escape to the base material and propagates along the HAZ, which causes a great deal to the spliced structure. Destroyer. In order to solve the above problem, there is a proposal of a welded structure, which is constructed by performing repair welding on one part of the butt welded joint (suspension of one part of the joint, where backfill welding is performed) A brittle crack propagated along the HAZ escapes to the side of the base material (for example, Patent Document 1). However, in the welded structure of Patent Document 1, it is effective when the fracture toughness of the base material is extremely excellent. However, when the fracture toughness of the base material is insufficient, the brittle crack that escapes to the side of the base material propagates far, and there is a structure as a structure. The strength is significantly reduced. Further, the volume of the backfilling welded portion becomes large, and there is a problem that the engineering time is lengthened and the manufacturing cost is increased. Further, there is proposed a welded structure in which an arrestor member is melted and joined to a weld line in a region where the propagation of brittle cracks occurring in the welded joint is to be stopped, wherein The brake material is an article that is suitable for use in a surface layer in a surface layer region having a thickness of 2% or more of the thickness of the surface or the back surface (for example, Patent Document 2). However, when the welded structure disclosed in Patent Document 2 is applied to a large-sized building, there is a case where, for example, a brittle crack propagated in the welded joint propagates in a welded joint that welds the brake member to the steel plate to invade the brake member. 201201947 After spreading inside the brake member, __ is connected again. In addition, when the brittle crack propagated by the welded joint is tied to the brake member and the *Xuan brake member is welded to the joint of the steel plate to escape to the base material side, the same as the above, the destruction of the base material is not "," Brittle cracks propagate very long, and there is also concern about the problem of making the strength of the welded structure significantly lower. CITATION LIST Patent Literature Patent Literature 1: Patent Application Publication No. 2005_1317 No. 8 Patent Document 2: Japanese Patent Application Publication No. 2 〇〇 7_〇 98841 C This is incorporated herein by reference. The present invention has been made in view of the above problems, and an object thereof is to provide a welded structure having brittle crack propagation resistance, whereby brittle cracks can be suppressed from being transmitted to a welded joint even when brittle cracks occur on a welded joint or The base material prevents cracking of the welded structure. The inventors of the present invention have placed a stop member for controlling the propagation of brittle cracks as in Patent Document 2 in order to prevent the occurrence of brittle cracks generated in the joint of the spliced joint to the welded joint or the base material. Carefully studied. As a result, it has been found that by appropriately modifying the shape or material properties of the brake member, the propagation of brittle cracks in the welded joint and the base material can be suppressed, and large-scale destruction of the welded structure can be prevented. That is, the object of the present invention is the content of 201201947 as described in the scope of the patent application. [1] A welded structure having brittle fracture propagation property, which is formed by butting a steel plate to form a steel plate and welding a joint, wherein: at least one of the steel plate fusion joints is provided with a stop steel plate fusion joint The crack resistance control unit that propagates the brittle cracks, the crack resistance control unit includes a brake member that is formed of a steel material having a brittle fracture propagation stop characteristic Kca of όΟΟΟΝ/ππη15 or more, and is inserted into the welded joint of the steel sheet to a through hole formed by the steel plate; and a brake splicing joint formed by abutting the outer edge portion of the brake member and the steel plate base material opposed thereto, wherein the brake member is along the length of the steel plate fusion joint Each of the horizontal width W (mm) and the thickness t (mm) in the direction in which the height H (mm) and the longitudinal direction of the steel plate fusion joint are crossed satisfies the following formulas (1) to (3). Relationship, 2T ^ H --. (1) 3.2d+50 ^ W · · · (2) 0.90T ^ t · · · (3) However, in the above formulas (1) to (3), T represents the foregoing The thickness of the steel plate (mm), d indicates the welding of the aforementioned steel plate The width (mm) of the welded metal portion in the joint is such that the outer edge portion of the brake member is formed at a length of 60 in the longitudinal direction of the steel plate welded joint. Above and 120. The above-mentioned range of angles intersects with the aforementioned steel plate fusion joint. [2] The welded structure having brittle crack propagation resistance according to the above [1], wherein the brittle metal portion of the brake fusion joint has a toughness 201201947 brittleness-fracture transition temperature vTrS3fC), The relationship with the brittle-ductile fracture transition temperature vTrS丨(.〇) indicating the toughness of the base material of the steel sheet satisfies the relationship shown by the following formula vTrS3 S vTrS 1 + 20. [3] A welded structure having a brittle crack propagation property as described in the above [1] or [2], wherein the steel sheet has a thickness of 25 mm or more and 150 mm or less. [4] The welded structure having brittle fracture propagation property according to any one of the above [1], wherein the steel sheet is arranged in at least two or more of the longitudinal direction of the steel plate fusion joint. The small steel plate is formed, and the small steel plates are butted together to form a small steel plate refining joint, and the financial crack control portion is provided as the aforementioned brake welding formed by the rear end side of the braking member extending from the molten metal portion. The joint is in contact with the aforementioned small steel plate fusion joint. [5] The welded structure having brittle-resistant crack propagation property according to any one of the above-mentioned items, wherein the steel sheet is arranged at least two or more of the longitudinal direction of the steel plate fusion joint. a steel plate is formed, and the small steel plates are butt welded to form a small steel plate fusion joint, and the crack resistance control portion is provided such that the brake fusion joint formed on the rear end side of the brake member extending from the welded metal portion contains the aforementioned In the case of the small-steel-welded joint, the brittle-ductile fracture-transition temperature vTrS4(t) which forms the toughness of the welded metal portion of the small-steel-welded joint, and the brittle-ductile fracture-transition temperature vTrSirC which indicates the toughness of the base material of the steel sheet are shown. The relationship between the two satisfies the relationship: vTrS4 ^ vTrSl + 20 . 8 201201947 Further, in the present invention, the welded metal portion and the heat-affected portion are welded to each other as a fusion joint. Further, the brittle fracture propagation stop characteristic Kca is a value of a temperature or a design temperature used by the spliced structure. According to the refining structure of the present invention, at least one of the refining joints is provided with a crack resistance control portion having a brake member and a brake fusion joint formed between the brake member and the base material steel plate. Therefore, even if there is a brittle crack in the welded joint, the crack-resistant control portion is transferred to the portion where the brittle crack of the welded joint is transferred to the steel sheet base material, or the y-mark control needle can be prevented. It can inhibit the brittleness (4) spread in the joints or base metals. Therefore, the fusion structure can be obtained at a high rate of birth and low cost, and large-scale damage prevention will occur in the miscellaneous structure. In the splicing structure of the present invention, the splicing structure of the construction structure or the civil steel structure can be used for both the A-type structure of the refining structure and the high purity of the destruction. In terms of construction, the efficiency of welding is high, and the material of steel is mixed, so its industrial effect is incalculable. BRIEF DESCRIPTION OF THE DRAWINGS The Ua) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ The state of the crack-resistant control unit, (the progress of the non-brittle crack of the duck. Fig. 2 is a schematic view showing the structure of the transfer structure of the present invention. 201201947 shows that the brake member and the brake are provided in the portion of the steel plate miscellaneous joint FIG. 3 is a schematic view showing a state in which the splicing structure of the present invention is applied to a ship-soldering structure. FIG. 4 is a schematic view showing the present invention. The other embodiment of the welded structure is the same as that of Fig. 2. Fig. 5 is a view similar to Fig. 2 of the welded structure of the present invention. Fig. 6(a) to (c) The drawings are for explaining the manufacturing method of the welded joint test body used in the embodiment of the present invention. The seventh (a) to (c) drawings are for evaluating the brittle crack propagation resistance in the embodiment of the present invention. The tensile test method is illustrated. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a welded structure having brittle crack propagation according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this embodiment is intended to further understand the invention. The form of the object of interest is not limited to the inventors unless otherwise specified. So far, the brittle cracks generated in the welded joint of the steel sheet are mainly in the long-term propagation of the welded joint of the steel sheet. The resulting brittle cracks have become a starting point. The problem arises from the fact that the entire welded structure is greatly damaged. The inventors know that in order to effectively control the propagation direction of the brittle cracks as described above, the crack propagation in the welded structure In the case of the above mentioned 201201947
在本發明中，在將鋼板1 ' lt] 接接頭2之中設置耐裂痕控制部4, 耐裂痕控制部4具有··制動構件5, 1對接熔接所形成之鋼板熔 / η入故何買適當化乃為重要者。 使用第1圖予以說明。 4 ’將鋼板熔接接頭2切開。 5 ’係由具有高的脆性裂痕In the present invention, the crack resistance control unit 4 is provided in the steel plate 1 ' lt] joint 2, and the crack resistance control unit 4 has the brake member 5, and the steel plate formed by the butt welding is melted/n entered. Appropriateness is important. This will be explained using Figure 1. 4 ′ Cut the steel plate fusion joint 2 . 5' is made of high brittle cracks
在鋼板_接之長向的—側所產生之脆性裂痕⑶ 係沿鋼板1與鋼板轉接那之境界(或者是_母材之轨 影響部)傳#。_咖接娜之裂痕CR係侵入制動熔 接接頭6，接著侵進制動構件5，但制動構件$係由^高之 鋼材所形成，目此可在制動構件5内部停止裂痕⑶之進展。 反之，在制動構件5之Kca低之時或制動構件之高度或 板厚等並未不^時料情形下，如第1⑷W所示，裂痕跳越 到制贿接接頭’再回_板熔接接頭，或如第1(d)圖所 示，裂痕貫穿制動構件5，也是有可能的。 、本發明係於如此基本原理之下，針對阻止脆性裂痕之 進展之母材鋼板之條件、控舰性裂痕之進展之制動構件 或制動熔接接頭之條件等進一步檢討而所構建者，以下， 針對本發明之實施形態予以詳細說明。 [第1實施形態] 11 201201947 <整體之結構> 第1實施形態係如第2圖所示，將鋼板丨、丨對接熔接而 形成鋼板熔接接頭2之形態之例，以下，將運用在該接頭之 形態稱為熔接構造體A而予以說明。 在炫接構造體A中’更遭遇到依衝突或地震等所造成之 破壞能量時，在預想到有裂痕發生及傳播之鋼板熔接接頭 之至少一處設有耐裂痕控制部4。 耐裂痕控制部4係設置成貫穿鋼板丨者，具有由脆性裂 痕傳播停止特性Kca為GOOON/mm1 ·5以上之鋼材構成之制 動構件5 ;及將該控制構件5對著鋼板丨對接熔接而形成之制 動熔接接頭6。 制動構件5係形成由與鋼板熔接接頭2之熔接線1相交 之交點5a各朝鋼板内部延伸之外緣部50(5卜52)，且該外緣 450(51、52)係形成為相對於鋼板熔接接頭2之長向，以6〇。 以上且120。以下之範圍之角度傾斜或正交之狀態。 在第2圖所示之熔接構造體a中，制動構件5係構造成外 '•彖。卩51、52相對於鋼板炼接接頭2之長向之角度成為9〇。， 使外緣部51、52—起相對於鋼板熔接接頭2正交，形成為平 面觀看時略呈四角形之長方形。 <鋼板> 溶接構造體所使用之鋼板丨係於船舶用熔接構造體、建 築構造體及土木鋼構造物等領域上，能使用具備迄今公知 之鋼板特性之鋼板。 例如’可舉下列之鋼為例，以質量％計，含有C: 0.01〜 12 201201947 0.18%、Si : 0.01 〜0.5%、Μη : 0·3〜2.5%、P : 0.01%以下、S : 0.001〜0.02%之組成為基礎，在該組成，按所需之性能，進 而含有N : 0.001〜0.008%、B : 0.0001 〜0.005%、Mo : 0.01〜 1.0%、A1 : 0.002-0.1%、Ti : 0.003〜0.05%、Ca : 0.0001 〜 0.003%、Mg : 0.001 〜0.005%、V : 0.001 〜0.18%、Ni : 0.01 〜 5.5% ' Nb ： 0.005-0.05% > Cu ： 0.01-3.0% > Cr ： 0.01-1.0% ' REM : 0.0005〜0.005%中一種或兩種以上，剩餘部分係藉Fe 及不可避免之雜質所構成者。 特別是脆性裂痕傳播停止特性Kca為όΟΟΟΝ/ιηηι1 5以 上之鋼板，可適合地使用日本發明專利申請案公開公報第 2007-302993號、第2008-248382號等所示般之組成之厚鋼 板。 如第2圖所示’在熔接構造體Α中，藉將鋼板1、1對接 炼接，而形成鋼板炼接接頭2。又，在藉該鋼板熔接接頭2 接合之鋼板1之每一片係設有用以貫穿容後詳述之制動構 件5設置之貫通孔3，且每一貫通孔3以鋼板熔接接頭2之熔 接線L為中心在每一鋼板1上形成對稱之狀態者。 鋼板1之板厚係以25mm以上且i50rnm以下之範圍為 佳。鋼板1之板厚係该範圍時，可確保作為熔接構造體之鋼 板強度’並能得到優異的耐脆性裂痕傳播性。特別是在使 用40mm以上之鋼板之熔接構造體，沒有可停止脆性裂痕之 傳播之有效機構’對於使用板厚40mm以上，更佳的是5〇mm 以上且100mm以下之鋼板之熔接構造體，本發明能更有效 地實施者。 13 201201947 <制動構件> 制動構件5係如第2圖所示，係以鋼板熔接接頭2之熔接 線1^為_心，在每一鋼板上，對稱配置於藉鋼板熔接接頭二 所接合之每一鋼板1所形成之貫通孔3。又，制動構件5係構 成相對於裸露在形成於鋼板1之貫通孔3内之熔接端對接熔 接所形成之制動熔接接頭6，且構成耐裂痕控制部4。 制動構件5係構成如上述之耐裂痕控制部4，即使在鋼 板熔接接頭2產生裂痕時，亦可在設在鋼板熔接接頭之中途 之耐裂痕控制部之制動構件5内部停止裂痕之傳播，防止裂 痕傳播而貫穿鋼板溶接接頭2，而使相互炼接之鋼板1彼此 斷開者。 制動構件5係由脆性裂痕傳播停止特性尺⑶=6〇〇〇N /mm1.5以上之鋼材所構成。又，第2圖所示之例之制動構件 5係形成有由與熔接線l相交之交點5a而朝各自的鋼板内部 延伸之外緣部51、52，且外緣部51、52形成為相對於鋼板 熔接接頭2之長向以6 0。以上且丨2 〇。以下之範圍之角度0傾 斜或正交者。 又，圖示例之制動構件5係以相對於外緣部51、52之鋼 板熔接接頭2之長向之角度形成為9〇。，使外緣部51、52一 起相對於鋼板熔接接頭2正交，且直線狀連結而形成者。接 著，外緣部51、52之後端51a、52a形成有各相連結之橫緣 部53、54，並於料橫緣部53、54之另1側形成下緣部 55，構成為平面觀看下略呈四角形之長方形。 如果是該形狀時，如第1(b)圖所示，就算從熔接接頭之 14 201201947 上下哪一方向有脆性裂痕傳播，亦可發揮同樣的效果。 制動構件5，係如上述，通過鋼板熔接接頭2之熔接線l 上之交點5a之外緣部51、52係以相對於鋼板熔接接頭2之長 向60°以上且120。以下之範圍之角度θ傾斜或正交者為佳。 藉將外緣部51、52之相對於鋼板熔接接頭2之長向之角 度0作成上述範圍，且將外緣部51、52相對於鋼板熔接接 頭2形成為傾斜或正交之狀態，假使就算產生了在鋼板熔接 接頭2傳播之脆性裂痕的時候，亦能確實地將該裂痕引進制 動構件5，有效地停止在制動構件内部脆性裂痕之進展，可 防止在熔接構造體A發生大規模的破壞。 在相對於鋼板熔接接頭之長向之制動構件之外緣部之 角度不足60°時，在鋼板熔接接頭所傳播之脆性裂痕會逃逸 到鋼板之母材側’有控制到使脆性裂痕引進制動構件變成 困難之可能性存在。為此，在鋼板炫接接頭傳播之跪性裂 痕係沿著制動熔接接頭前進，有使裂痕之傳播難以停止之 虞。 又 ’在將與鋼板熔接接頭交叉之制動構件之外緣部直 線形成時，相對於一邊的鋼板側之鋼板熔接接頭之長向之 角度一變成超過120。時，另一邊的鋼板側之角度成為不足 60°，與上述同樣，脆性裂痕不會侵入制動構件，且沿著制 動熔接接頭前進，有裂痕之傳播難以停止之虞。 為了更確實地將脆性裂痕引導到制動構件，外緣部之 角度Θ之理想範圍係7 5。以上且10 5。以下，更佳之範圍係8 5 〇 以上且95°以下。 15 201201947 以制動構件5之材質而言，只要是具有如上述之脆性裂 痕傳播h 生Kxa^GGGN/mm1 5以上之特性之鋼板，對 於其化子成分組成或製造方法、組織等就無制限定，可 適田地採用者。使用如此之鋼板，假使就算在鋼板炫接接 頭2產生有裂痕時’亦可在制動構件内部有效地停止該裂痕 之傳播。 此外，以制動構件而言，只要使用表示韌性之脆性一 延性破裂轉移溫度vTrS2(°C)值更低且韌性高之鋼材時，可 將停止裂痕之傳播之效果更加提高。 熔接構造體A所使用之制動構件5係有必要使前述鋼板 炼接接頭之長向之高度H(mm)、與鋼板熔接接頭之長向交 叉之方向上之橫向寬度W(mm)、及板厚t(mm)的每一尺寸滿 足下述（1)〜(3)式所示之關係。 2Τ ^ Η • · ·⑴ 3d+50 ^ W • · · (2) 0.90T ^ t · • · · (3) 惟’在上述(1)~(3)式中’ T(mm)表示前述鋼板之板厚， d(mm)表示前述鋼板炫接接頭中之溶接金屬部之寬度。 此外，制動構件之高度H及橫向寬度W係以制動熔接接 頭之熔接金屬部之中點為基準。又，外緣部之角度Θ不是 90。時，制動構件之高度Η是制動熔接接頭與鋼板熔接接頭 之所交叉之處之間之距離’橫向寬度％是與鋼板熔接接頭 垂直之方向之最大寬度。 本發明人係改變各種制動構件之形狀及尺寸，反覆實 201201947The brittle crack (3) produced on the long side of the steel plate _ is transmitted along the boundary between the steel plate 1 and the steel plate (or the influence of the _ base material). The crack of CR is invaded into the brake welded joint 6, and then invaded into the brake member 5, but the brake member $ is formed of steel of high height, so that the progress of the crack (3) can be stopped inside the brake member 5. On the other hand, when the Kca of the brake member 5 is low or the height or thickness of the brake member is not in the case of the material, as shown in the first (4)W, the crack jumps to the briquette joint 'return_plate fusion joint Or, as shown in Fig. 1(d), it is also possible that a crack penetrates the brake member 5. According to such a basic principle, the following is a further review of the conditions of the base steel sheet for preventing the progress of the brittle crack, the condition of the brake member or the brake fusion joint for controlling the progress of the ship crack, and the following, Embodiments of the present invention will be described in detail. [First Embodiment] 11 201201947 <Structure of the whole body> The first embodiment is an example in which the steel plate 丨 and the 丨 are butt welded to form a steel plate fusion joint 2, and the following is applied to The form of the joint is referred to as a welded structure A and will be described. When the destruction energy due to a collision or an earthquake is more encountered in the splicing structure A, the crack resistance control portion 4 is provided at at least one of the steel plate fusion joints in which crack occurrence and propagation are expected. The crack resistance control unit 4 is provided with a brake member 5 made of a steel material having a brittle fracture propagation stop characteristic Kca of GOOON/mm1·5 or more, and is formed by butting and welding the control member 5 against the steel sheet. Brake welding joint 6. The brake member 5 is formed by an outer edge portion 50 (5, 52) extending from the intersection 5a intersecting the weld line 1 of the steel plate fusion joint 2, and the outer edge 450 (51, 52) is formed to be opposed to The long direction of the steel plate fusion joint 2 is 6 inches. Above and 120. The following ranges are angled or orthogonal. In the welded structure a shown in Fig. 2, the brake member 5 is configured to be "outer". The angles of the ridges 51 and 52 with respect to the longitudinal direction of the steel plate splicing joint 2 are 9 〇. The outer edge portions 51, 52 are orthogonal to the steel plate fusion joint 2, and are formed into a rectangular shape having a substantially square shape when viewed in plan. <Steel Sheet> The steel sheet used for the welded structure is used in the fields of a ship welded structure, a building structure, and a civil steel structure, and a steel sheet having a conventionally known steel sheet property can be used. For example, 'the following steels are exemplified, and in terms of mass%, C: 0.01 to 12 201201947 0.18%, Si: 0.01 to 0.5%, Μη: 0·3 to 2.5%, P: 0.01% or less, S: 0.001 Based on the composition of ~0.02%, in the composition, according to the required properties, further containing N: 0.001~0.008%, B: 0.0001~0.005%, Mo: 0.01~1.0%, A1: 0.002-0.1%, Ti: 0.003 to 0.05%, Ca: 0.0001 to 0.003%, Mg: 0.001 to 0.005%, V: 0.001 to 0.18%, Ni: 0.01 to 5.5% 'Nb: 0.005-0.05% > Cu: 0.01-3.0% > Cr : 0.01-1.0% ' REM : One or two or more of 0.0005 to 0.005%, and the remainder consists of Fe and inevitable impurities. In particular, a thick steel plate having a composition such as that shown in Japanese Laid-Open Patent Publication No. 2007-302993, No. 2008-248382, etc., which is a squeezing crack propagation stop characteristic Kca is a steel sheet of όΟΟΟΝ/ιηηι1 or more. As shown in Fig. 2, in the welded structure body, the steel sheets 1 and 1 are joined to each other to form the steel sheet splicing joint 2. Further, each of the steel sheets 1 joined by the steel plate fusion joint 2 is provided with a through hole 3 for passing through the brake member 5 which will be described in detail later, and each of the through holes 3 is welded with a welded joint of the steel plate. A state of symmetry is formed on each of the steel sheets 1 for the center. The thickness of the steel sheet 1 is preferably 25 mm or more and i50 rnm or less. When the thickness of the steel sheet 1 is within this range, the strength of the steel sheet as the welded structure can be ensured and excellent brittle crack propagation property can be obtained. In particular, in a welded structure using a steel plate of 40 mm or more, there is no effective mechanism for stopping the propagation of brittle cracks. For a welded structure of a steel plate having a thickness of 40 mm or more, more preferably 5 mm or more and 100 mm or less, The invention can be implemented more effectively. 13 201201947 <Brake member> As shown in Fig. 2, the brake member 5 is formed by arranging the weld line of the steel plate fusion joint 2 as a core, and symmetrically disposed on each steel plate by the welded joint of the steel plate. A through hole 3 formed by each of the steel sheets 1. Further, the brake member 5 is configured to form a crack-resistant control portion 4 with respect to the brake-welded joint 6 formed by abutting and welding the welded end formed in the through-hole 3 formed in the steel sheet 1. The brake member 5 is configured to have the crack resistance control unit 4 as described above, and even when the steel plate fusion joint 2 is cracked, the crack can be prevented from being propagated inside the brake member 5 provided in the crack resistance control portion in the middle of the steel plate fusion joint. The crack propagates through the steel sheet to dissolve the joint 2, and the mutually welded steel sheets 1 are disconnected from each other. The brake member 5 is composed of a steel material having a brittle crack propagation stop characteristic ruler (3) = 6 〇〇〇 N / mm 1.5 or more. Further, in the brake member 5 of the example shown in Fig. 2, the outer edge portions 51, 52 are formed to extend toward the inner portions of the respective steel sheets by the intersection 5a intersecting the weld line 1, and the outer edge portions 51, 52 are formed to be opposed to each other. The length of the steel plate fusion joint 2 is 60. Above and 丨2 〇. The angles of the following ranges are skewed or orthogonal. Further, the brake member 5 of the illustrated example is formed at an angle of 9 inches with respect to the longitudinal direction of the steel plate fusion joint 2 of the outer edge portions 51, 52. The outer edge portions 51 and 52 are formed to be orthogonal to each other with respect to the steel sheet fusion joint 2, and are formed in a straight line. Then, the rear end portions 51a and 52a of the outer edge portions 51 and 52 are formed with the lateral edge portions 53 and 54 which are connected to each other, and the lower edge portion 55 is formed on the other side of the material lateral edge portions 53, 54 to be viewed in plan view. A slightly rectangular rectangle. In the case of this shape, as shown in Fig. 1(b), the same effect can be obtained even if there is brittle crack propagation in the upper and lower directions of the welding joint 14 201201947. The brake member 5 is as described above, and the outer edge portions 51, 52 of the intersection 5a on the weld line 1 of the steel plate fusion joint 2 are 60 or more and 120 with respect to the longitudinal direction of the steel plate fusion joint 2. It is preferable that the angle θ of the following range is inclined or orthogonal. The angles 0 of the outer edge portions 51 and 52 with respect to the longitudinal direction of the steel plate fusion joint 2 are set to the above range, and the outer edge portions 51 and 52 are formed to be inclined or orthogonal with respect to the steel plate fusion joint 2, even if it is even When the brittle crack propagated by the steel plate fusion joint 2 is generated, the crack can be surely introduced into the brake member 5, and the progress of the brittle crack in the brake member can be effectively stopped, and large-scale destruction in the welded structure A can be prevented. . When the angle of the outer edge portion of the long-distance brake member with respect to the welded joint of the steel plate is less than 60°, the brittle crack propagated in the welded joint of the steel plate may escape to the side of the base material of the steel plate to control the introduction of the brittle crack into the brake member. There is a possibility of becoming difficult. For this reason, the flaws in the propagation of the joint of the steel plate are advanced along the brake fusion joint, and there is a possibility that the propagation of the crack is difficult to stop. Further, when the outer edge portion of the brake member that intersects the steel plate fusion joint is formed straight, the angle of the longitudinal direction of the steel plate fusion joint on the side of the steel plate becomes more than 120. At the same time, the angle of the other side of the steel sheet is less than 60°, and similarly as described above, the brittle crack does not intrude into the brake member, and advances along the brake welded joint, and the propagation of cracks is difficult to stop. In order to more reliably guide the brittle fracture to the brake member, the ideal range of the angle Θ of the outer edge portion is 75. Above and 10 5 . Hereinafter, a more preferable range is 8 5 〇 or more and 95° or less. 15 201201947 The material of the brake member 5 is not limited as long as it has a characteristic of the above-described brittle crack propagation, Kxa^GGGN/mm1 5 or more, and its composition, manufacturing method, structure, and the like. Can be adapted to the field. With such a steel sheet, even if cracks occur in the steel plate joint 2, the propagation of the crack can be effectively stopped inside the brake member. Further, in the case of the brake member, the effect of stopping the propagation of the crack can be further improved by using a steel material having a low brittleness-ductile fracture transition temperature vTrS2 (°C) and a high toughness. The brake member 5 used in the welded structure A is required to have a height H (mm) in the longitudinal direction of the steel plate welded joint, a lateral width W (mm) in a direction intersecting the longitudinal direction of the steel plate welded joint, and a plate. Each dimension of the thickness t (mm) satisfies the relationship shown by the following formulas (1) to (3). 2Τ ^ Η • · · (1) 3d+50 ^ W • · · (2) 0.90T ^ t · • · · (3) Only 'T (mm) in the above formula (1) to (3) means the aforementioned steel plate The thickness of the plate, d (mm), indicates the width of the molten metal portion in the above-mentioned steel plate joint. Further, the height H and the lateral width W of the brake member are based on the midpoint of the welded metal portion of the brake welded joint. Also, the angle of the outer edge portion is not 90. The height Η of the brake member is the distance between the intersection of the brake fusion joint and the welded joint of the steel plate. The lateral width % is the maximum width in the direction perpendicular to the welded joint of the steel sheet. The inventor changed the shape and size of various brake members and reversed it. 201201947
施熔接構造體之破壞試驗。其結果是得到對於L 、戈'丨方止脆性 裂痕橫越鋼板熔接接頭或鋼板母材很長距離之情况上θ有 效果之上述關係。 (1) 式係顯示針對停止裂痕之進展之效果，在制動構件$ 之高度Η及鋼板1之板厚Τ上有相關關係。 進展而來之裂痕之能量係與鋼板板厚Τ呈正比，且+要 能因應該能量之制動構件5之高度尺寸η，因此規定了上述 (1)式。並未設定Η之上限值，但實施時，自然規定在納2 熔接接頭2之尺寸之範圍内。 (2) 式係顯示針對停止裂痕之效果，在制動構件5之寬卢 W及鋼板熔接接頭中之熔接金屬部之寬度(1上有相關關係: 在本發明中，是構成為將沿著鋼板熔接接頭2傳播而來 之脆性裂痕CR侵入制動構件5而予以停止者。此時，已在 大型破壞試.驗已確實得知下述情況，，在㈣動材之橫向 寬度w不夠時，在制動構件5之後端51a、52a再度發生脆性 裂痕，且會沿著具有與傳播脆性裂痕之主應力方向垂直或 近於垂直之角度之橫緣部53、54而傳播者。從各種實驗的 結果已有如下知見，即，脆性裂痕會跳過熔接接頭之寬度d 程度之距離，還有脆性裂痕會跳過至少有熔接接頭d23倍 的區域之可能性。又’解析傳播中之脆性裂痕前端之應力 場之結果亦有如下知見，即，負載應力為3〇〇N/mm2程度 時，應力兩之區域是USmm程度者。在此，將橫向寬度w 之必要下限值設定為3d+ 50mm，而實施大型破壞試驗之結 果’確認到不會有脆性裂痕在制動構件5之後端51a、52a再 17 201201947 度發生，Destruction test of the welded structure. As a result, the above relationship is obtained in which θ is effective for the long-distance of the L, Ge's square brittle crack across the steel welded joint or the steel base material. (1) The type shows the effect on the progress of stopping the crack, and has a correlation between the height of the brake member $ and the thickness of the steel plate 1. The energy of the crack originated is proportional to the thickness of the steel sheet, and + is required to correspond to the height dimension η of the braking member 5 of the energy, so the above formula (1) is specified. The upper limit is not set, but in practice, it is naturally specified within the range of the size of the 2 welded joint 2. (2) The type shows the effect of stopping the crack, the width of the welded metal portion in the wide flange W of the brake member 5 and the welded joint of the steel plate (1 has a correlation: in the present invention, it is configured to be along the steel plate The brittle crack CR propagated by the welded joint 2 intrudes into the brake member 5 and is stopped. At this time, the following has been confirmed in the large-scale damage test, and when (4) the lateral width w of the moving material is insufficient, The rear end 51a, 52a of the braking member 5 again undergoes a brittle crack and propagates along the lateral edge portions 53, 54 having an angle perpendicular or nearly perpendicular to the direction of the principal stress propagating the brittle crack. The results from various experiments have been It is known that brittle cracks will jump over the width d of the welded joint, and that brittle cracks will skip the possibility of at least the area of the welded joint d23. Also 'analyze the stress at the front end of the brittle crack in the propagation. The result of the field is also known as follows: when the load stress is about 3〇〇N/mm2, the area of the stress is about USmm. Here, the necessary lower limit of the lateral width w is set to 3d+50mm. The large-scale destruction test result 'not confirmed brittle cracks in the brake member 5 after the end 51a, 52a of occurrence of re-17201201947,
όΟΟΟΝ/πυη1.5 之時， 性Kca剛好為 月bl·生夂冋4是因為進展而來之裂痕之能. 比，但制動構件5之脆性裂痕傳播停止特 制動構件5之板厚t係比鋼板丨之板厚之 …1.5 、_ 痕停止在制動構件5之内部。 請倍還小時，在所測試之鋼板板厚之範_，不能將裂 藉將制動構件5之各財紐定為上㈣係時，即使在 鋼板熔接接頭2有裂痕發生時，亦能將裂痕之傳播引進制動 構件5 ’使得在姉動構件5㈣停止㈣之it展之情況更 能確實地實現。 在制動構件之各尺寸值之關係不滿足上述（1)〜(3)式所 不之關係時，依照在鋼板熔接接頭所發生之裂痕之狀態， 會有裂痕從制動構件逃逸，或是不能將裂痕之進展停止在 制動構件5内部之危險性衍生。 為了更能確實地將脆性裂痕之傳播停止在制動構件内 部’在上述（1)式中，Η/T係以2·5以上者為佳，3〇以上更佳。 進而’制動構件之高度Η宜為250mm以上，或3〇〇mm以上， 進而’ 40〇mm以上更佳，橫向寬度W宜為2〇〇mm以上，或 201201947 250mm以上，進而，300mm以上更佳。 又，在熔接構造體A中，表示構成制動熔接接頭6之熔 接金屬部之韌性之脆性一延性破裂轉移溫、與 表示鋼板1之母材韌性之脆性—延性破裂轉移溫度 vTrS 1(°C )之關係係滿足下述(4)式所示之關係更佳： vTrS3 ^ vTrSl + 20 · · . (4)。 藉使構成制動熔接接頭6之熔接金屬部之韌性(在此， 脆性一延性破裂轉移溫度）與鋼板丨之母材韌性之關係滿足 上述關係式，即使在鋼板熔接接頭2有裂痕發生時，亦可將 裂痕之傳播方向有效地引進制動構件5之内部。此時，將形 成制動炫接接頭6之雜金屬之μ降低，喊著对裂痕控 制部4，能有效地得到將鋼板熔接接頭2所發生之脆性裂痕 之傳播方向確實地引進制動構件5之作用。 在形成制動熔接接頭之熔接金屬部之韌性與鋼板之母 材物性之Μ科足上述㈣式時，依照鋼板轉接頭所 產生之裂痕之狀態，有可能使該裂痕逃逸到母材側，而不 此付到藉觸構件所得狀裂痕停止絲，依照鋼板之母 材特性’而有可能不能將脆性裂痕停止。 —此外，在本發明之熔接構造體中，制動構件5之形狀不 限定於如第2圖所示之將外緣部5卜52形成為直線之例，但 制動構件5之與炫接線L之交點&而朝各鋼板内部延伸之 外、、彖。P51、52只要是相對於鋼板雜接頭2之長向6〇。以上 且120以下之範圍内之角度，就能發揮預定之效果，可 當地採用者。 、 19 201201947 在在本實施形態中，說明只使用1片制動構件⑽ 在鋼板1之構成，但並不限 趣… ❿於此’例如亦可將2片以上之制 動構件積層而使用，可適#地採用。 <停止脆性裂痕之傳播之控制> :乂下’在形成上述構成之炫接構造體钟，針對在鋼板 炼接接頭2發生驗裂痕時之㈣狀傳播停 以說明。 π 丁 ,第圖所*在鋼板炫接接頭2之長向之—側（第2圖 中之縱長:¾向之上側）所發生之脆㈣痕c r仙鋼板熔接 接頭2中之長向之另—側（第2圖中之縱長方向之下側）開始 傳播(參考第2圖中之雙點虛線箭頭符號）。 此時’在熔接構造體八中，以長向傳播到鋼板熔接接頭 2之脆性裂痕會侵入形成耐裂痕控制部4之制動熔接接頭 6進而，长入制動構件5。在此，制動構件5係構成為脆性 裂痕傳播停止特性Kca為6000N/mm15以上，因此能有效地 停止已侵入之裂痕。 藉上述作用’熔接構造體A，例如即使在於鋼板熔接接 頭2上發生脆性裂痕時，亦可抑制脆性裂痕傳播到鋼板熔接 接頭2或鋼板母材部1廣泛範圍，因此可將發生大規模的破 壞發生防範於未然者。 將如此本實施形態之熔接構造體A，例如運用在大型船 舶或建築構造物、土木鋼構造物等之各種熔接構造物，就 可同時滿足熔接構造物之大型化、對於破壞之高安全性、 建^中之溶接之高效率化、鋼材之經濟性等等。 20 201201947 —為使耐裂痕控制部發揮上述功能 ，預測在熔接構造體 曝露在破壞能量時有裂痕發生之可能性存在之鋼板熔接接 ^在其⑫接接頭設置丨處或數處者即可。在被預測從兩方 向之進展之鋼板熔接接頭中，將對抗於外緣部51、52之另 邊之外緣部55亦作成相對於鋼板嫁接接頭2之長向60。以 上且120〇以下之範圍内之角度。 <耐裂痕控制部之製作方法〉 以下在如上述之炼接構造體A中，針對製作财裂痕控制 部4之方法之一例予以說明。 而才裂痕控制部4係於曝曬在來自衝突或地震等之很大 之破壞能量時，在預測裂痕之發生及傳播之鋼板熔接接頭 之途中’至少設置1處。 為設置耐裂痕控制部4，形成用以配置制動構件5之貫 通孔3。在形成貫通孔時，如第6(a)圖所示，有諸如在鋼板 之階段上事先切割而形成貫通孔之部分之方法、為了熔接 而先將鋼板臨時組裝之狀態下切割之方法、或者是在熔接 鋼板之後形成貫通孔之方法等，任一方法皆可。當然亦有 可月b在既有之溶接構造體形成貫通孔3後再運用本發明。 在於鋼板熔接前形成貫通孔3時，首先切除鋼板形成貫 通孔3(3a、3b) ’如同在鋼板1之溝槽面（gr〇〇ve surface)u、 12開口之狀態。其次’將形成貫通孔％、儿之部分留下， 對各鋼板1之溝槽面11、12對接熔接，而形成鋼板熔接接頭 1。 其次，將由脆性裂痕傳播停止特性Kc46000N/mmi.5 21 201201947 以上之鋼材所構成之制動構件5插入所形成之貫通孔3。接 著’藉將制動構件5之外緣部51、52，並且將下緣部53相對 於與此相對之鋼板所露出之溝槽面各對接熔接，而形成制 動熔接接頭6。藉如此順序，以鋼板熔接接頭2之熔接線1 為中心而在每一鋼板1上成為對稱之狀態下，形成由制動構 件5及制動熔接接頭6所構成之耐裂痕控制部4。 在鋼板熔接接頭及制動熔接接頭之對接熔接上，針對 熔接方法及熔接材料並無特別限制。惟，為提昇制動熔接 接6本身之耐破壞韌性，例如，以熔接方法而言，宜採用被 覆電弧熔接(SMAW)或二氧化碳氣體電弧熔接(c〇2熔接）， 又，以將成為熔接材料之線材(Wire)之成分作成高Ni者為 佳。 又，為了盡可能地抑制脆性裂痕傳播，進而，防止在 鋼板熔接接頭2及制動熔接接頭6中產生新的疲勞裂痕或脆 性裂痕之起點，因此宜以熔接金屬完全填充各熔接接頭， 形成沒有熔接缺陷之狀態。 藉上述順序，可製造如第2圖所示之本實施形態之具有 耐脆性裂痕傳播性之熔接構造體A。 <運用熔接構造體之船舶構造體之一例> 將運用上述之炼接構造體A之船舶構造體之一例顯示 在第3圖之概略圖。 如第3圖所示，船舶構造體7〇具有骨材(補強材料)71、 曱板板材（deck plate)(水平構件)72、船殼内板（垂直構件) 73、船殼外板74而概略地構成。又，圖示例之船舶構造體 22 201201947 7 0係於藉形成船殼内板7 3之多數鋼板〖彼此對接熔接（b uU welding)而所形成之鋼板熔接接頭（在第3圖中省略圖示）之 長向之一部分設置耐裂痕控制部4，而成為具備本實施形態 之熔接構造體A之構造。 依上述構成之船舶構造體70,藉運用本實施形態之熔 接構造體A之構成，即使在發生了傳播到鋼板熔接接頭之脆 性裂痕時，亦可藉耐裂痕控制部4，有效地控制裂痕之傳播 方向。藉此，可安定地停止鋼板熔接接頭所產生之脆性裂 痕’並且可防止在船舶構造體70產生大規模的破壞者。 [第2實施形態] 以下，一邊參照第4圖，一邊詳細說明本發明第2實施 形態之熔接構造體B。此外，在以下之說明中，針對成為與 上述之第1實施形態之熔接構造體A共通之構成，附與相同 的符號，並省略其詳細之說明。 熔接構造體B係指接接之鋼板將多數小鋼板對接熔接 而形成時之例。 即，如第4圖所示，鋼板1〇係將排列在鋼板熔接接頭2〇 之長向之至少2片以上之小鋼板（參考第4圖中之符號21〜24) 對接熔接而形成，且在將該鋼板10、10對接熔接而形成之 鋼板熔接接頭20設置耐裂痕控制部4。 在小鋼板21、22之間，藉對接熔接而形成小鋼板熔接 接頭25、26 ’形成在制動構件5之下緣部55側之制動熔接接 頭6係接觸於該小鋼板熔接接頭25、26而設置。為此，在熔 接構造體B中，制動構件5之下緣部55形成為沿著小鋼板熔 23 201201947 接接頭25、26之形狀之相同形狀。 如此，在鋼板熔接接頭之中途有在鋼板熔接接頭交又 之熔接接頭25、26之事項上，熔接構造体B係與上述之第1 實施形態之熔接構造體A不同。 依熔接構造體B，與上述之熔接構造體A同樣，在鋼板 炫接接頭20有脆性裂痕發生時，亦可將該脆性裂.CR經由 制動熔接接頭6而確實地侵入制動構件5(參考第4圖中之雙 點虛線箭頭符號）。又，侵入制動構件5之脆性裂痕CR確實 地停止在制動構件5内，因此鋼板溶接接頭2〇不會斷裂， 又，能防止在炫接構造体B產生大規模的破壞者。 [第3實施形態] 以下，針對本發明之第3實施形態之熔接構造體c _ 邊參考第5圖，一邊將與之前的實施形態共通之部分省略而 予以說明。 炼接構造體C亦與炼接構造體B同樣，對接溶接之鋼板 是將多數小鋼板對接溶接而形成之形態之例，如第5圖所 示，鋼板10A是將排列在鋼板熔接接頭2〇A之長向之至少2 片以上之小鋼板（參考第5圖中之符號31〜34)對接炼接所形 成，在將該鋼板10A、10A對接炼接所形成之鋼板炼接接頭 20A設置耐裂痕控制部4。 在炫接構造體C中，如圖所示，將小鋼板對接炼接而形 成之小鋼板溶接接頭35、36係作成包含構成耐裂痕控制部4 之制動構件5之下緣部55側所形成之制動熔接接頭之構成。 又，在圖不之炫接構造體C中’小鋼板炼接接頭3 5、3 6 24 201201947 相連而形成為直線狀。 依熔接構造體c ,與上述之熔接構造體A、B同樣，即 使在鋼板仏接接頭20A發生有脆性裂痕時，亦可經由沿著制 動構件5之上緣部51、52所形成之制動熔接接頭6〇，確實地 將脆性裂痕CR侵入制動構件5(參考第5圖中之雙點虛線箭 頭符號）。 又，侵入制動構件5之脆性裂痕CR係於由脆性裂痕傳 播停止特性Kca高之鋼材所構成之制動構件5中馬上停止， 因此能防止在熔接構造體C發生大規模的破壞者。 又’在熔接構造體c中，表示構成小鋼板熔接接頭35、 36之熔接金屬部之韌性之脆性—延性破裂轉移溫度 vTrSfC)與表示鋼板之母材勃性之脆性—延性破裂轉 移溫度服丨⑻之關係為滿^下述⑸式所示之關係之構 成： vTrS4 ^ vTrSl+20 …•⑺。 藉此，例如即使在從第5圖中之下側方向有脆性裂痕傳 播在炼接接頭2GA時’該脆_痕亦傳播麵接接頭％或溶 接接頭36而容易侵入制動構件5，因此藉該制動構件$就可 將脆性裂痕停止。 以下，舉出本發明之具有耐脆性裂痕傳播性之溶接構 造體之實關，更具體地說日林發明，但本發明原本就不 是受下列實施例所限制者’亦可在能適合前述及後述 之範圍内適當地加人變更予以實施，其等任_者也都二― 在本發明之技術範圍内。 ’氩 25 201201947 實施例 [熔接構造體之製造] 首先，藉於製鋼步驟中控制熔鋼之脫酸、脫硫及化學 成分’連續鑄造後’製作下述表1所示之化學成分之鑄塊。 接著，以基於日本海事協會(NK)規格船體用壓延鋼材 KA32、KA36、KA40之規格之製造條件，將前述鑄塊再加 熱後熱壓延’製得各種板厚之鋼板。進而，對該鋼板施行 各種熱處理，並控制此時之條件，而適當予以調整以將母 材之脆性裂痕傳播停止特性Kca^/mm1.5)成為各種值。 由製得之鋼板，適當地截取測試片之尺寸為500〇1〇1>< 500mmx板厚之ESSO試驗(脆性裂痕傳播停止試驗）片，評價 並確認一10°C下之Kca特性，並測定鋼板之脆性—延性破裂 轉移溫度vTrSl(°C)。在表1將Kca特性及vTrSl—起顯示。 其次，如第6(a)、6(b)圖所示，在於鋼板丨之溝槽面u、 12開口之狀態下，形成貫通孔3a、。接著，每一貫通孔 h、3b形成為以熔接線l為中心呈對稱之貫通孔3之狀態 下，將各鋼板1之溝槽面11、12對接熔接，形成鋼板熔接接 頭2 ’而將鋼板1彼此接合。 其次，將由下述表1所示之化學成分以及構成為表2所 示之鋼特性及形狀之鋼板所構成之制動構件5貫穿鋼如而 =入貫通孔3之内部。接著，將制動構件5之外緣部51、^、 橫緣部53、54以及τ緣部55，在鋼心—相對於藉貫通孔3 ^出之雜端騎對接熔接，形成制_接接頭6，而將制 動構件5與鋼板丨相接合。 26 201201947 藉以上之順序’以鋼板炫接接頭2之炼接紅為中心而 上呈對稱之狀態下，形成由制動構件與制動炫接 接頭構成之耐裂痕控制部。 又’如第7(b)、7刚所示，令下緣部之位置是在由鋼 板1下端距料心位置測麵之地方配置制動構件$。又， 如第賴所示，在制動雜之上緣部51、52、橫緣部〜 54及下緣部55 ’並且’在鋼板1之貫通孔3内露出之炫接端 施行溝槽加卫，形成為以板厚方向中心為頂點而呈請 平線呈Μ)。又，在制動構件5之各緣部與在鋼板^ 之貝通孔3内露出之炫桩她 如此上 ^ G接&之間，在則述頂點中具備約3_ 之路徑間隔之狀態下進行·熔接處理。 上述順序中之鋼板1彼此之對接料、及鋼板1 與制動構件5之對接炫接係藉二氧化碳氣體電弧炫接⑽ 溶接)進彳了 ’並且，此時找接材料是使料有高M成分之 2線。X’在切接接頭之形錢中，為了防止產生新 :=，清況’而進㈣接處理，以娜金屬完 全地填滿各熔接接頭者。 之後’藉將切接接頭冷卻，製得 又，與上述同樣，將各鋼板及 =件接合’製得如第4、5圖之_構造體(本發明例、 比車父例）。 [評價試驗] 試驗針對藉上述順序製造之炼接構造體，進行如下之評價 27 201201947 首先’準備如第7(a)圖所示之試驗裝置90,並適當地調 整以上述順序製作之熔接構造體之每個樣本，且安裝試驗 裝置90。在此，設於第7(b)、7(c)圖所示之鋼板熔接接頭2 之裂痕發生部之窗框81係用以貼靠楔具，施加預定之應 力’強制地產生脆性裂痕者，缺口狀之前端部係施有〇.2ππη 寬之縫隙加工者。 其次’藉於與鋼板熔接接頭2之熔接線L垂直方向上附 與262N/mm2及300N/mm2之抗拉力，在鋼板熔接接頭2使脆 性裂痕發生。接著’藉將該脆性裂痕傳播在鋼板熔接接頭2 之’溶接線L上’予以評價熔接構造體之耐脆性裂痕傳播性。 此時之環境氣體溫度當作為_1{rc。 接著’調查到達制動熔接接頭6後中之脆性裂痕之傳播 方向及停止位置，確認裂痕之傳播、停止之形態是符合與 第1圖之b〜d對應之如下所示之三階段哪一者。 [b] ·.·脆性裂痕到達制動熔接接頭之後侵入制動構件， 立刻停止（第1 ~ b圖之形態）。 [c] .··脆性裂痕到達制動熔接接頭之後，就沿著該制動 炫接接頭傳播’其次再回到鋼板溶接接頭，傳播在鋼板炼 接铸頭（第1 —c圖之形態）。 [n性裂痕到達制動炫接接頭之後，進入該制動熔 接貝it❿貫穿制動構件後就這樣傳播在鋼板熔接接頭 (第1 —d圖之形態）。 在本貫施例所使用之鋼板1之化學成分組成、鋼板製造 條件及母材之脆性冑痕傳播停止特性Kea(N/_, _5)之明細 28 201201947 顯示在表1。又，將鋼板1對接熔接而形成鋼板熔接接頭2時 之熔接條件，及制動構件5之鋼板特性及形狀之明細顯示在 表2、4，並且將形成制動熔接接頭6B夺之熔接條件，及脆性 裂痕之傳播之評價結果之明細顯示在表3〜5。 29 201201947 Μ 脆性-延性 破裂轉移 溫度vTrSl ro xr-t r*— c~— g C3 c-*~ c—- cs> v> r— 寸 g g 担 域犯 鹎鞄 較 G> <=» <=» o O G· o c=» 〇 «=» o CIS c=> Kca (N/mni1·*) g 04 g O 〇> o r~- 1 ο*ϊ i ΝΛ» i so 穹 vo 营 c*^ C=> c-»< VO C» c^» •^- cz> P— g e=> <=> v〇 o g 0 1 o c^ 疆 t g 卜 9 m I 避 — w» C-Ί G> w> w> S s so & r~~ o Γ~ g 宕 o u·'» o w-» s o 霊 〇e^ OC d PQ ιϋΝ Μ 戚 φ： 链 m 围 沄 co Oi> oo oo oo «t*j w-» c^a c»^ οβ 〇> oo &\ C^i oo CD 〇«» c^> <=s 〇 C*4 o <=> C3 c-a ci C~4 C> o c=> s «=> s s s s > ON CO c=> i <=s C3 〇 C3 JO C3 <T^ c=> c^a c=> 〇a c=> era C-i C=D CP c»^ s c> <=> c^a e=> <=> 〇 CS <=> I I 一 c-a «^> c^a <〇 ΟΪ 〇 5 r»4 5 v> o 〇J <=> <^n c—- os c-'i oo w> o〇 w CO v〇 V» <r*4 o C-»i o V» ο-ί o w* CO 5 o 对 5 oo c-a C3 CO cr-i CO er» oo e-v> o c^a 〇〇 v〇 OO v«〇 o CS w> c-i 宕 90 PQ 〇 o o o ON o o 〇\ Os o o o v#-» c^> e^> €->·* e=* P— C^l c=» g o o g w» C*j <r» 〇 r*~* (=> g g c=i <r-» e—> ci W-l c^i CD cn o d r<-» o c> 艺 C=> <-<» d CO e-»J 〇 r<-» cs C'-J C-M O CO C^i c=> to s cz> ^r <3> s <3> s C^> CO <=> s cs s c> CO o s o S G» S s 〇 cf^ G> c*"i s G> S c=? -^- c=> o 寸 c=» CU w-\ g c=> •^· o o C"—· c=> '-s*' o o V» d oo CP ^gr o 〇 cs v\ <g> <=> w^> C=> 兰 C=> c— o c> <=> cS >^c* d w «g C3 <=» s c=> s NO C"M 令 04 CO W"*» oo c^a oo V* C^i >〇 r*~ Vk rvi eo »rf~l '«ϊΓ 〇a v-> 〇» VO on 寸 o 。 s <=> 〇<-» €^) r〇 Oi tz> <r-^ e〇> ΟΛ 宕 v〇 c=> c=> V» <=> <=> C3 o C*-» OJ C*1 <*»a c·») r*~> C-J «**> C**J <-〇 c*-t C-<J CO C_J 苎 «=> Ξ V» oo C3 沄 o g e=> oo <=> V» OS <=3 G & W» d 1 «=» o 。 s o o C3 <=a 踩蹈齡酿 5： 〇J c*-> cu. 2； w-» cu VO s： oo cu 0-\ 〇► Ξ： s C*J s: CO K： ^ί· S： u^» P^« 5 w-t 30 201201947 (龄(^5¾^)^^5¾^¾¾¾^^^11)¾^^¾1^¾¾1 • φ>"ι^φ8κ^^§Γ?νοζ :MSR· R: l'1'砘二：酉 z浓-": β&:γ 琺班J) _lwl^—_ ΎΜ 1 甚 Μ OL 1 薜 ISs s § 3 ? 7 \rs 7 1 8 ； 7 8 8 § 8 8 8 a 8 i 1111 1 1 1 § i 1 § P- 1 1 1 1 1 1 爸 賽 § 卜 1 囊PI < a E CO s a： ΚΪ < 5 tn £ ? ? 3 5 3 _ 4 a ΙΛ1 \〇 r* r~ O' o tn y〇 2 NO Ρϊ r* v> r* r* 卜 \〇 VO am p S s 00 cJ cs od Ό 3 S m CK 2 1 g S § 5 2 3 5 5 _ g R 1 5 3 替 'O r> 00 v〇 c5 VO CO 苕 Ό ΐ9 cs § Si S S 适 S § JO S 3 3 a jq 3 S NO in 3 S s R 5 5 il i § 祭 g O O cn § 沄 § 8 8 Β 〇 ΐ O cn O 爱 爱 s i § 霞卜C B S 1 s Si B § δ Π B S1 S s s i ss ss i Tl g_5l 逐 s Sj i 边 f a 1 1 辁 1 fg 11 I £ a Έ € s ss ss 1 1 H ^ 备 p |s I I 1 s 1- a S R R s 8 g s *^l «1 g a R R 3 s 1- § 1 ? § § § s ? g g 0 1 § § § P y Ύ 1 1 § Ϊ | § § § 1 1] ! 5 § § g T Jj 1 fills c • • • • .. • • * • • • i? ? : ? ' * 1 • - • 1 • • « • < • • i ~i I I 1 i ilfl lm * • • • * 1 • i • • 1 • 1 爵 1 § § 霧" jn 辱 ? ? i? a 8 jn 8 8 IQ 8 ? ? ? ? ^11 j 4il 1 δ § ·〇 I _J 1 1 1 1 Ό 1 1 § Γ- I 1 s in 1 I 1 1 411 — - - r- — - - " — R o3 η s R ?3 m n r； tn S .i η Pi ?； ?3 导 * s s i! i § § § l| §1 ^ Ό 器 1 ? § 1 ? § s s 1- 1 s S R R s B g s 沒 S R 异 R R s s 11| : S s： 2： CS a： 2 a. »Λ ε iC ε ς iQ a a S! |l |i §f S沼 11 ii 11« 囤 <N 烺 ϊ CS 竺 固 ri 賊 Ϊ 轹 函 <s m 囵 ri 轵 睡 〇J m 1 CM 婢 i 15 "i^ ri 锌 習 辟 ϊ cs E i rs E S 按 I <s 採 画 I "@" ί 1 *i~ «Λ "i~ W"> 轵 ii — PJ eo V» r* oo 〇> σ 2 2 s in oc 2 a • w®sl -· iiiil " ^ϋφι •<DW^ 逍^%酉箱 s s s s I坩 31 201201947 (l)i 11 ®|η 11 1 裂痕停止性能 麵停止 翻停止 娜停止 裂痕停止 娜停止 裂痕停止 娜停止 1 裂痕停止 裂痕停止 裂痕停止 | 裂痕停止 I 裂痕停止 裂痕停止 麵停止 (由下側侵入） 裂痕停止 ss停止 裂痕停止 裂痕停止 停止 雛停止 試驗 負載 應力 (N/nnn2) eg <£> CM CV3 KD CV3 ① ΟΙ (•O 0*5 N LO N cq (0 cq <£> to CS) CM C〇 CM Cs) <〇 CM w 262 cs> (O CNJ g CO CO CO CM CN1 CD CM (Si iD C<J CO csj <〇 04 CM CO Cvj s % i| 議 1 符號 判定式 vTrsl+2〇-vTrs4 1 1 1 1 t 1 1 1 LO C4 in ΙΛ 〇 LO i | @ file lii 1 1 1 l 1 1 1 1 LO lO un γ ΙΛ ΙΛ 1 LO T 熔接 入熱量 (kj/cro) ] 1 1 1 1 1 1 1 1 1 1 1 in CO ΙΛ CO to ¢0 (•D c〇 制動離接頭;條件及vTrs3 m 判定式 vTrsl+20-vTrs3 to in tn s § o Ift 〇 m LT5 cs ur> CO o s S s LA CO s s 12¾ ο fp in ① 1 LO 1 g to T o T S 1 o S 1 m op 1__1 U? -90 〇 0 i—H 1 o ? -80 l〇 T § 1 o CO 熔接 入熱量 (kj/cm) (Ο 寸 s s <〇 ΙΛ CQ LO CO cj (O CO 00 OO OO CC CN3 to CO CO OO CM 〇〇 <M CO CO CM 11 CVJ CO 寸 ΙΩ <〇 卜 OO σ> o •->4 t eo LO 卜 00 2 s 32 201201947 ^0 :":固籍· 〇z!捶i ; :θζ哝iY®簦) __ 1 1 m^m^mm. ι mmm ίΕϋ^νΤιώ CQ 8 s 8 3 S 8 8 8 8 8 1 8 S ? Υ2 s 8 s » ί? mmK fiWih mcan1^ 1 P i 1 i 1 1 籍 § 1 1 ν〇 1 1 1 1 1 1 § "9· 1 I I i ll®i 3 g ? 3 3 g 3 3 3 ε fn cu O £ ε ε f <Ν CL 5 5 04 5： 謙 t- 0.90T w> o O «η *Ti V» »/» »r> in w> «Λ 卜 辱 c〇 rn r- Γ- c- 卜 r*· P- r- P- aa | 卜· 5 oo oq oo 3 s 5 3 3 s s s g C-- 00 ec 々· a 沄 搬 於贼 W- 3如50 fN π σ\ S s 〇. & § § m CN v〇 ?n S§ VO vj 萃 兑 § S § 3 § § g § § 3 s a 二 ON r4 〇\ £> 9 3 ? 挪 Η-2Γ ： 1 g § S g g § § g § O ? Ο ? S s s 导 g s S B B i〇 s s B s. B s S B B s B g 義 ImB 四角肜 mm\ 1 a \mm l四娜 \mm \mm \mm\ \mm\ 四娜 四角形 \mB\ 1四娜 mm\ \mm\ mm\ \mm\ 丨四蝴 Ram mm mm 四角肜 (梯肠 mm 1 R^{mm) 1- ^1 R 9, SR s s s R O R R fS R R 1m s 8 § § ? % § g § 1 i § § s § § § s P § 8 g 1 § § § 8 § § § § § § § g § § s § § § 舰部 (rmm vTsl m) CC) • • 1 * • • . < • * • * * 5? i9 i? 1111! * 1 - . § § 尋 I #% 獅Λ 中之獅 1 ' ' • • I • • • • - i i 2224 g 砌部 vTisi CO i9 IQ jn i? i? i9 i? 1C ic i? i9 8 5=5 s ¢5 5? 担s l|i § ry § TT 1 尋 i 1 i i i § v i i i ι 1 g 1 1 1 § m (mm 中之m> - — - - — — — - 一 — — - — — - - - R ?s R ?3 21,23 3 職 (mm) s Ρϊ Ρί o 导 穿 m Am QdAm) 聚 祭 ? 费 费 g § § § 费 g § g g § 展 器 § § § 1- I 5¾ P, 5¾ P, 9, 5¾ 5¾ § p P P 9 R R R R R 臟 娜 臟1> 2 <s 0： 2 2 s 2 2 2 2 z ffi 52 cu O o o § o P： o S： PKVP10 (ffi) picypio P10P12 (ϊΐ2) PUVP12 卿 4^93 ^jm (第2» 4观 第鋼 賴 第2圃 第晒 第姻 節画I \mm\ 1笫2固1 ^211 1 節固 笫2圇 mm] 第2圖 第姻 第2圖 節固 第2圓 第2圓 第4圆 第4画 第4圈 第4圃 樣本 麵 Μ » a — cn ^r »r> v〇 卜 〇〇 σ\ ο cs 33 201201947 (寸璐雄)s« Μ 雜 iS8 m saa 1® it 逝 裂痕停止性能 丨裂痕停止 1 丨裂痕停止 1 1 類停止 1 丨裂痕停止 1 丨裂痕停止 1 1 翻停止 1 1 裂痕停止 1 丨裂痕停止 1 | 裂痕停止 | 1 裂痕停止 丨 | 裂痕停止 I 丨裂痕不停止 I 1裂痕不停止| 1 裂痕不停止 I 1 不停止1 1 職不停止 I 裂痕不停止 1裂痕不停止I 1 麵不停止 I | 酿不停止 I ! 麵不停止 I 裂痕不停止ι 裂痕不停止 試驗 負載 應力 (N/ mm2) | 262 1 | 262 i 1 262 1 1 300 1 1 300 1 1 300 [300 I I 300 1 [300 | | 300 ； | 300 I | 262 1 1 262 I 1 262 1 262 1 1 262 I 1 262 1 1 262 I 262 I 1 262 I | 262 I 1 262 1 262 活 m ^ > 11 ii i致 1 堪 $ 符號 判定式 vTrsl+2〇-vTrs4 1 1 1 1 1 UJ ΙΛ eg ιο ιο 担2嗶一 file Ml 猩t ^ 1 1 1 1 1 1 1 1 1 1 LO T ΙΛ ιρ ΙΟ CO ΙΛ 寸 1 熔接 入熱量 (k J/ cm) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 C0 ΙΛ CO 00 CO ii> CO 制動溶接接頭之溶接條件及vTrs3 符號 判定式 vTrs!+2〇-vTrs3 〇 ΙΟ U3 rH ο Ν N ο CNJ 10 2 LO 1〇 LO 〇 〇 〇 ο 〇 Ο 〇 〇 1 § 导 s s ss flP 111 〒 ο 1 0 1 LO 1 ιο fp Ln 1 o f ο I 〇 1 〇 1 〇 1 〇 1 § 1 1 另 1 1 窝 1 〇 Τ S 1 〇 1 ο 1 s 1 o ιο 熔接 入熱量 (kj/cm) ΙΛ 守 U5 寸 ΙΛ 寸 (D CO fD eo Φ to CSJ CSJ 呀 CVJ 寸 00 CM in CO Ui CO ΙΛ CO ιο CO in CO in CO LO 1〇 CO C0 CO η CO ¢0 CO CO 樣本 號碼 CM n 寸 CSJ in CsJ (0 CO 卜 cs ?3 a C0 rH w CO LO φ 00 05 Ο *Η 2 餡 1 a 1 34 201201947 .[評價結果] 表2〜5所示之本發明例卜15及21〜31係有關於第2圖所 示之第1實施形態之炼接構造體A之例，本發明例16〜18係有 關於第4圖所示之第2實施形態之熔接構造體B，本發明例 I9、2〇係有關於第5圖所示之第3實施形態之熔接構造體〇 之例。 又，表4、5所示之比較例1〜8是具有與第2圖所示之炼 接構造體A同樣之構造之例，比較例9〜12是具有與第4圖所 示之熔接構造體B同樣之構造之例。 在上述各例中，本發明例1〜8、12〜16、18〜31、以及比 較例1〜9、12，如第2圖或第4圖所示，將平面觀看時略呈四 角形之制動構件形成相對於外緣部之鋼板熔接接頭之長向 之角度成為90。而製造熔接構造體之例。 又，本發明例9〜11、17以及比較例10、U，在相對於 外緣部之鋼板熔接接頭之長向之角度成為表2所示之預定 之角度之狀態下，將平面觀看略呈四角形之制動構件形成 為構成直線狀之上緣部相對於橫緣部傾斜者。其等之例 έ中二本發明例9〜11、17以及比較例10、11是制動構件之橫 彖。Ρ53 54亦傾斜，且將制動構件整體形成為梯形之例。 β匕卜發明例14是裂痕由下方進展時之例，但另一例 是裂痕由上方進展時之例。 表5所不，本發明之炫接構造體(本發明例1〜31) :可將脆性裂痕全部以制動構件停止（上糊之形態卜藉 本發月之溶接構造體，即使在於熔接接頭有跪性裂疾 35 201201947 可 播 ’亦可抑制裂痕傳播舰接接頭或母材之情況， 炫接構造體之斷裂，確認具有優異的㈣性裂痕傳 鋼板::才=:1例12、13任一者都是制動構件之板厚比 生之胎㈣ 頭之厚度大之例，但鋼板，熔接接頭發 ;痕到達制動構件祕接頭m制動構件， 争止在制動構件，能發揮預定之耐脆性裂痕傳播性。 止’能發揮預定之耐脆性裂痕傳播性。 又’本發明例4、15雖,然制動構件之高度H是以⑴式 板f “本發日㈣lG、11、22、23任—麵是制動構件之 =、.板之母材㈣接接頭之厚度小之例，但與上述同 :板溶接接頭所發生之脆性裂痕立刻以制動構件停 所 延性破裂 以制動構件停止裂痕 規定之下限值，但表㈣動構件之祕之脆性— 轉移溫度VTYS2值是一側較高，所以 之傳播。 對此’在比較例1〜12之炼接構造體中，制動構件之鋼 板特性或形狀任-者不符合本發明之規定，耐脆性裂痕傳 播之形態成為上述[cJ或[d]，如表5所示，不能將脆性 之傳播停止。 比較例b 5之嫁接構造體由於制動構件之高度h不夠， 比較例2由於制動構件之板厚t不夠，比較例怕於高度η及 板厚t不夠’各於脆性裂痕侵進簡祕接頭及制動構又件之 後，再次傳播到鋼板熔接接頭，不能將脆性裂痕停止，而 成為[d]之例。 36 201201947 又’比車父例3由於制動構件之板厚t及高度Η不夠，並且 制動構件之Kea特性，因此與上述同樣 ，不能以制動構 件停止脆性裂痕，W為⑷之例。 又’比較例6、9由於制動構件之橫向寬度W不適當， 因此脆性裂痕會沿著制_接接·過 ，就這樣傳播到鋼 板熔接接頭，而成為[c]之例。 比車义例7丨2係由於制動構件之艮以特性不足，因 ”上述同樣$成以制動構件停止脆性裂痕，而成為⑷ 之例。 又’比較例8由於制動構件之Kca特性不足，因此盘上 述同樣’不能以制動構件停止脆性裂痕，而成為[d]之例。 比車乂例10、11每—例都是由於相對於制動構件之 外緣部之鋼·接接頭之長向之角度超過本發明之規定範 圍外’不能將雜裂痕引進職構件，繞過制動溶接接頭 之後’就這樣-直傳播到鋼板熔接接頭，因此不能停止脆 性裂痕’而成為[c]之例。 =以上之結果即可明白，本發明之炫接構造體即使 ^接接頭有脆性裂痕發㈣，亦可抑制裂痕纽接接頭 且可防止一之斷裂™ 37 201201947 i:圖式簡單說明3 第1(a)〜(d)圖係說明本發明之模式圖，（a)顯示將鋼板彼 此熔接而形成之鋼板熔接接頭之一部分上設有由制動構件 及制動熔接接頭所構成之耐裂痕控制部之狀態，（b)〜(d)顯 示脆性裂痕之進展狀況。 第2圖係說明本發明之熔接構造體之一例之模式圖，顯 示在鋼板熔接接頭之一部分設有由制動構件及制動熔接接 頭所構成之而ί裂痕控制部之狀態之俯視圖。 第3圖係針對將本發明之熔接構造體運用在船舶用熔 接構造體之形態予以說明之概略圖。 第4圖係說明本發明之熔接構造體之另一例且與第2圖 同樣之圖。 第5圖係說明本發明之熔接構造體之另一例且與第2圖 同樣之圖。 第6(a)〜(c)圖係針對本發明實施例所使用之熔接接頭 測試體之製造方法予以說明之圖。 第7(a)〜(c)圖係針對用以評價本發明實施例中之耐脆 性裂痕傳播性之抗拉試驗方法予以說明之圖。 38 201201947 【主要元件符號說明】 A,B,C 熔接構造體 70 船舶構造體 l，l〇，l〇A 鋼板 71 骨材 11,12 溝槽面 72 甲板板材 2,20,20A鋼板熔接接頭 73 船殼内板 21〜24,31〜34 小鋼板 74 船殼外板 25,26,35,36小鋼板熔接接頭 81 窗框 3,3a,3b 貫通孔 90 試驗裝置 4 耐裂痕控制部 L 熔接線 5 制動構件 A 熔接構造體 5a 交點 CR 脆性裂痕 50 外緣部 d 寬度 51,52上緣部(外緣部） Η 長向南度 51a、52a 後端 L 熔接線 53、54 橫緣部 W 橫向寬度 55 下緣部 Θ 角度 6、60制動熔接接頭 39When όΟΟΟΝ/πυη1.5, the sexual Kca is just the month bl. The 夂冋4 is the energy of the crack due to the progress. However, the brittle crack propagation of the braking member 5 stops the thickness t of the special braking member 5 The plate thickness of the steel plate is 1.5, and the _ mark stops inside the brake member 5. Please double the time, in the test of the thickness of the steel plate _, can not be used to determine the financial member of the brake member 5 as the upper (four) system, even when the steel plate welded joint 2 cracks, can also crack The propagation of the introduction of the brake member 5' makes it possible to achieve more reliably when the swaying member 5 (4) is stopped (4). When the relationship between the respective dimensional values of the brake member does not satisfy the relationship of the above formulas (1) to (3), depending on the state of the crack generated in the welded joint of the steel sheet, cracks may escape from the brake member, or may not be The risk of cracking stops at the inside of the brake member 5. In order to more reliably stop the propagation of the brittle crack in the inner portion of the brake member, in the above formula (1), the Η/T system is preferably 2.5 or more, more preferably 3 〇 or more. Further, the height of the 'brake member is preferably 250 mm or more, or 3 mm or more, and further preferably '40 mm or more, and the lateral width W is preferably 2 mm or more, or 201201947 250 mm or more, and more preferably 300 mm or more. . Further, in the welded structure A, the brittleness-ductile fracture transition temperature of the toughness of the welded metal portion of the brake fusion joint 6 and the brittleness-ductile fracture transition temperature vTrS 1 (°C) indicating the toughness of the base material of the steel sheet 1 are shown. The relationship is better than the relationship shown in the following formula (4): vTrS3 ^ vTrSl + 20 · · . (4). The relationship between the toughness of the welded metal portion constituting the brake fusion joint 6 (here, the brittleness-ductile fracture transition temperature) and the toughness of the base material of the steel sheet 满足 satisfies the above relationship, even when cracks occur in the welded joint 2 of the steel sheet. The direction of propagation of the crack can be effectively introduced into the interior of the brake member 5. At this time, the μ of the miscellaneous metal forming the brake splicing joint 6 is lowered, and the crack control unit 4 can be effectively obtained by effectively introducing the propagation direction of the brittle crack generated by the steel plate fusion joint 2 into the brake member 5. . When the toughness of the welded metal portion of the brake fusion joint and the physical properties of the base material of the steel sheet are the same as the above formula (4), the crack may escape to the side of the base material according to the state of the crack generated by the steel plate adapter. It is not possible to pay the crack-stop yarn of the borrowing member, and the brittle crack may not be stopped depending on the base material property of the steel sheet. Further, in the welded structure of the present invention, the shape of the braking member 5 is not limited to the example in which the outer edge portion 5b is formed as a straight line as shown in Fig. 2, but the braking member 5 and the hidden wiring L are Intersection & and extending beyond the inside of each steel plate, 彖. P51 and 52 are as long as 6 相对 with respect to the longitudinal direction of the steel plate miscellaneous joint 2. Above and below the angle of 120, the intended effect can be achieved, and it can be used locally. 19 201201947 In the present embodiment, a configuration in which only one piece of the brake member (10) is used for the steel sheet 1 is described. However, the present invention is not limited thereto. For example, two or more brake members may be laminated and used. #地使用. <Control of stopping the propagation of the brittle cracks>: The underside of the sleek structure clock having the above-described configuration is described, and the (fourth) propagation when the crack is formed in the steel sheet splicing joint 2 will be described. π 丁, the figure is * in the long direction of the steel plate joint 2 - side (longitudinal length in Figure 2: 3⁄4 to the upper side) of the brittle (four) mark crxian steel plate welded joint 2 The other side (the side below the longitudinal direction in Fig. 2) starts to propagate (refer to the double-dotted dotted arrow symbol in Fig. 2). At this time, in the welded structure 8, the brittle crack propagated in the longitudinal direction to the steel plate fusion joint 2 enters the brake fusion joint 6 forming the crack resistance control portion 4, and further enters the brake member 5. Here, the brake member 5 is configured such that the brittle fracture propagation stop characteristic Kca is 6000 N/mm 15 or more, so that the invading crack can be effectively stopped. By the above-described action 'welding structure A, for example, even when brittle cracks occur on the steel plate fusion joint 2, it is possible to suppress the spread of brittle cracks to the steel plate fusion joint 2 or the steel sheet base portion 1 so that large-scale destruction can occur. Precautions occur before they occur. When the welded structure A of the present embodiment is applied to various welded structures such as large ships, building structures, and civil steel structures, for example, it is possible to simultaneously satisfy the increase in the size of the welded structure and the high safety against damage. The high efficiency of the welding in the construction, the economics of the steel, and so on. 20 201201947—In order for the crack resistance control unit to perform the above functions, it is predicted that the steel plate fusion joint may be formed when the welded structure is exposed to the destruction energy, and the steel plate may be welded or welded at the 12 joints. In the steel plate fusion joint which is predicted to progress from both directions, the other outer edge portion 55 against the outer edge portions 51, 52 is also formed in the longitudinal direction 60 with respect to the steel plate graft joint 2. Above and within the range of 120 〇 or less. <Manufacturing Method of Crack Resistance Control Unit The following is an example of a method of producing the crack control unit 4 in the above-described welded structure A. On the other hand, the crack control unit 4 is provided at least one place in the middle of the steel plate fusion joint for predicting the occurrence and propagation of cracks when exposed to a large amount of destruction energy from a conflict or an earthquake. In order to provide the crack resistance control portion 4, a through hole 3 for arranging the brake member 5 is formed. When forming the through hole, as shown in Fig. 6(a), there is a method of forming a portion of the through hole by cutting in advance at the stage of the steel sheet, a method of cutting the steel sheet in a state of being temporarily assembled for welding, or It is a method of forming a through hole after welding a steel plate, and the like. Of course, it is also possible to apply the present invention after forming the through hole 3 in the existing molten structure. When the through hole 3 is formed before the steel sheet is welded, the steel sheet is first cut to form the through hole 3 (3a, 3b)' as in the state in which the groove surfaces u, 12 of the steel sheet 1 are open. Next, the through hole % is formed, and the portion of the through hole is left, and the groove faces 11 and 12 of the respective steel sheets 1 are butt welded to form the steel plate fusion joint 1. Next, the brake member 5 composed of the steel material having the brittle fracture propagation stop characteristic Kc46000N/mmi.5 21 201201947 or more is inserted into the through hole 3 formed. Next, the outer edge portions 51, 52 of the brake member 5 are attached, and the lower edge portion 53 is butt welded to the groove surface exposed by the opposite steel plate to form a brake fusion joint 6. In this order, the crack-resistant control portion 4 composed of the brake member 5 and the brake-welded joint 6 is formed in a state where the steel plate 1 is symmetrical about the weld line 1 of the steel plate fusion joint 2. There is no particular limitation on the welding method and the welding material on the butt welding of the steel plate fusion joint and the brake fusion joint. However, in order to improve the fracture toughness of the brake fusion joint 6, for example, by welding, it is preferable to use coated arc welding (SMAW) or carbon dioxide gas arc welding (c〇2 welding), and to become a welding material. It is preferable that the composition of the wire (Wire) is made high in Ni. Further, in order to suppress the propagation of brittle cracks as much as possible, and further prevent the occurrence of new fatigue cracks or brittle cracks in the steel plate fusion joint 2 and the brake fusion joint 6, it is preferable to completely fill the fusion joints with the welded metal to form no weld. The state of the defect. By the above procedure, the welded structure A having the brittle-resistant crack propagation property of the present embodiment as shown in Fig. 2 can be produced. <Example of a ship structure using a welded structure> An example of a ship structure using the above-described welded structure A is shown in a schematic view of Fig. 3 . As shown in Fig. 3, the ship structure 7 has an aggregate (reinforcing material) 71, a deck plate (horizontal member) 72, a hull inner plate (vertical member) 73, and a hull outer plate 74. It is roughly constructed. Further, the ship structure 22 201201947 7 0 of the illustrated example is a steel plate fusion joint formed by a plurality of steel plates forming the hull inner plate 7 3 by b uU welding (not shown in FIG. 3 The crack resistance control unit 4 is provided in one of the lengths of the length of the display, and the structure of the welded structure A of the present embodiment is provided. According to the configuration of the welded structure A of the present embodiment, the ship structure 70 having the above configuration can effectively control the crack by the crack resistance control unit 4 even when a brittle crack propagates to the welded joint of the steel sheet. Direction of communication. Thereby, the brittle cracks generated by the steel plate fusion joint can be stably stopped and the large-scale destruction of the ship structure 70 can be prevented. [Second Embodiment] Hereinafter, a welded structure B according to a second embodiment of the present invention will be described in detail with reference to Fig. 4 . In the following description, the same components as those of the welded structure A of the above-described first embodiment are denoted by the same reference numerals, and the detailed description thereof will be omitted. The welded structure B is an example in which a steel plate that is joined is formed by butt welding a plurality of small steel plates. In other words, as shown in Fig. 4, the steel sheet 1 is formed by butt welding of at least two or more small steel sheets (refer to symbols 21 to 24 in Fig. 4) arranged in the longitudinal direction of the steel sheet fusion joint 2〇, and The steel plate fusion joint 20 formed by butting and welding the steel sheets 10 and 10 is provided with a crack resistance control unit 4. Between the small steel plates 21, 22, the small steel plate fusion joints 25, 26' formed by butt welding are formed on the lower edge portion 55 side of the brake member 5, and the brake fusion joints 6 are in contact with the small steel plate fusion joints 25, 26. Settings. For this reason, in the welded structure B, the lower edge portion 55 of the brake member 5 is formed in the same shape along the shape of the small steel plate fused 23 201201947 joints 25, 26. As described above, the welded structure B is different from the welded structure A of the above-described first embodiment in the case where the welded joints 25 and 26 of the welded joint of the steel sheets are joined in the middle of the steel plate welded joint. According to the welded structure B, similarly to the above-described welded structure A, when the steel plate joint 20 has a brittle fracture, the brittle fracture CR can be surely intruded into the brake member 5 via the brake welded joint 6 (refer to 4 double-dotted arrow symbol in the figure). Further, since the brittle crack CR invading the brake member 5 is surely stopped in the brake member 5, the steel sheet fusion joint 2 is not broken, and it is possible to prevent a large-scale destruction of the spliced structure B. [Third Embodiment] The welded structure c_ of the third embodiment of the present invention will be described with reference to Fig. 5, and the same portions as those of the previous embodiment will be omitted. Similarly to the welded structure B, the welded structure C is a form in which a plurality of small steel plates are butted and abutted, and as shown in Fig. 5, the steel plate 10A is arranged in the steel plate welded joint 2〇. A small steel plate of at least two or more lengths (refer to symbols 31 to 34 in Fig. 5) is formed by butting the joint, and the steel plate splicing joint 20A formed by butting the steel sheets 10A and 10A is resistant. Crack control unit 4. In the spliced structure C, as shown in the figure, the small steel plate fusion joints 35 and 36 formed by butting the small steel plates are formed to include the lower edge portion 55 side of the brake member 5 constituting the crack resistance control portion 4. The composition of the brake fusion joint. Further, in the splicing structure C of the figure, the small steel plate splicing joints 3 5 and 3 6 24 201201947 are connected to each other to form a straight line. According to the welded structure c, similarly to the above-described welded structures A and B, even when brittle cracks occur in the steel sheet splicing joint 20A, the brake fusion can be formed via the upper edge portions 51, 52 of the brake member 5. The joint 6〇 reliably invades the brittle crack CR into the brake member 5 (refer to the double-dotted arrow symbol in Fig. 5). Further, since the brittle crack CR invading the brake member 5 is immediately stopped in the brake member 5 composed of the steel material having the high brittle fracture propagation stop characteristic Kca, it is possible to prevent a large-scale destruction in the welded structure C. Further, 'in the welded structure c, the brittleness-ductile fracture transition temperature vTrSfC which represents the toughness of the welded metal portion of the small-steel welded joints 35 and 36) and the brittleness-ductile fracture-transfer temperature of the base material of the steel sheet are indicated. The relationship of (8) is the composition of the relationship shown in the following formula (5): vTrS4 ^ vTrSl+20 (•7). By this means, for example, even if a brittle crack propagates from the lower side in the fifth drawing to the refining joint 2GA, the brittle-to-spot spreads the joint % or the joint 36 and easily intrudes into the brake member 5, so that it is The brake member $ stops the brittle crack. Hereinafter, the practice of the present invention for a brittle structure having brittle crack propagation resistance, more specifically, the invention of the invention, but the invention is not limited by the following examples, may be suitable for the above In the range described later, the change is carried out as appropriate, and the like is also within the technical scope of the present invention. 'Argon 25 201201947 Example [Manufacturing of welded structure] First, by controlling the deacidification, desulfurization and chemical composition 'continuous casting of molten steel in the steel making step, the ingots of the chemical composition shown in Table 1 below were produced. . Then, the ingots were heated and then calendered by the manufacturing conditions of the specifications of the rolled steel sheets KA32, KA36, and KA40 for the hull of the Japan Maritime Association (NK) to obtain steel sheets having various thicknesses. Further, various heat treatments are applied to the steel sheet, and the conditions at this time are controlled, and the brittle crack propagation stop characteristics Kca^/mm1.5) of the base material are appropriately adjusted to various values. From the obtained steel sheet, the ESSO test (brittle crack propagation stop test) sheet of the test piece having a size of 500 〇 1 〇 1 < 500 mm x thickness was appropriately taken out, and the Kca characteristic at 10 ° C was evaluated and confirmed, and The brittleness of the steel sheet - the ductile fracture transfer temperature vTrSl (° C.) was measured. In Table 1, the Kca characteristics and vTrSl are displayed together. Next, as shown in Figs. 6(a) and 6(b), the through holes 3a are formed in a state in which the groove faces u and 12 of the steel sheet are opened. Then, each of the through holes h, 3b is formed in a state in which the through holes 3 are symmetrically centered on the weld line 1, and the groove faces 11 and 12 of the respective steel sheets 1 are butt welded to each other to form a steel plate welded joint 2'. 1 joined to each other. Next, the brake member 5 composed of the chemical composition shown in Table 1 below and the steel sheet having the steel characteristics and shape shown in Table 2 was passed through the steel to enter the inside of the through hole 3. Next, the outer edge portions 51, ^, the lateral edge portions 53, 54 and the edge portion 55 of the braking member 5 are spliced and welded in the steel core - with respect to the miscellaneous end through the through hole 3, thereby forming a joint 6. The brake member 5 is joined to the steel sheet. 26 201201947 In the above-mentioned order, a crack-resistant control unit composed of a brake member and a brake-sleeve joint is formed in a state where the upper portion of the steel plate joint 2 is symmetrical. Further, as shown in Figs. 7(b) and 7, the position of the lower edge portion is such that the brake member $ is disposed at a position where the lower end of the steel sheet 1 is measured from the center of the core. Further, as shown in the first, the upper end portions 51, 52, the lateral edge portions ～ 54 and the lower edge portion 55' of the brake miscellaneous portion and the splicing end exposed in the through hole 3 of the steel plate 1 are grooved and reinforced. , formed in the center of the plate thickness direction as the apex and presented as a flat line. Further, between the edge portions of the brake member 5 and the studs exposed in the through-holes 3 of the steel sheet, the gap between the vertices and the vertices is about 3 _. · Welding treatment. In the above sequence, the steel plates 1 are butted against each other, and the butt joint between the steel plate 1 and the brake member 5 is entangled by the carbon dioxide gas arc splicing (10), and the material is found to have a high M component. 2 lines. X' is in the shape of the splicing joint, in order to prevent the occurrence of new :=, the condition </ RTI> and the (four) connection process, the full metal welder is filled with the metal. Then, the splicing joint was cooled, and the steel sheets and the y = joints were joined together to produce the constituting bodies as shown in Figs. 4 and 5 (examples of the present invention, examples of the vehicle father). [Evaluation Test] The test was performed on the welded structure produced in the above-described procedure. 27 201201947 First, the test device 90 shown in Fig. 7(a) was prepared, and the welded structure produced in the above-described order was appropriately adjusted. Each sample of the body is mounted with a test device 90. Here, the window frame 81 provided in the crack generating portion of the steel plate fusion joint 2 shown in Figs. 7(b) and 7(c) is used to abut against the wedge and apply a predetermined stress to forcibly generate a brittle crack. The notched front end is provided with a slit processor of 〇.2ππη width. Then, by the tensile force of 262 N/mm 2 and 300 N/mm 2 in the direction perpendicular to the welded wire L of the steel plate fusion joint 2, brittle cracks occur in the welded joint 2 of the steel sheet. Next, the brittle crack propagation property of the welded structure was evaluated by propagating the brittle crack on the 'solubility line L' of the steel plate fusion joint 2. The ambient gas temperature at this time is taken as _1{rc. Then, the propagation direction and the stop position of the brittle cracks in the rear of the brake fusion joint 6 are investigated, and it is confirmed that the form of propagation and stop of the crack conforms to the three stages shown below corresponding to b to d of Fig. 1 . [b] ··· The brittle crack penetrates the brake member after reaching the brake fusion joint, and stops immediately (form of Figures 1 to b). [c] .··After the brittle crack reaches the brake fusion joint, it propagates along the brake joint. Secondly, it returns to the steel plate joint and propagates to the steel plate casting head (form of Figure 1 - c). [After the n-slip reaches the brake joint, the brake fusion joint penetrates the brake member and then propagates through the steel plate fusion joint (the form of Fig. 1 - d). The chemical composition of the steel sheet 1 used in the present embodiment, the manufacturing conditions of the steel sheet, and the details of the brittle scar propagation stop characteristic Kea (N/_, _5) of the base material 28 201201947 are shown in Table 1. Further, the welding conditions when the steel sheet 1 is butt welded to form the steel sheet fusion joint 2, and the details of the characteristics and shape of the steel sheet of the brake member 5 are shown in Tables 2 and 4, and the welding condition of the brake fusion joint 6B is formed, and the brittleness is formed. The details of the evaluation results of the propagation of the cracks are shown in Tables 3 to 5. 29 201201947 脆 Brittleness-ductile rupture transfer temperature vTrSl ro xr-t r*— c~— g C3 c-*~ c—- cs> v> r—inch gg 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄 鹎鞄;=» o OG· oc=» 〇«=» o CIS c=> Kca (N/mni1·*) g 04 g O 〇> or~- 1 ο*ϊ i ΝΛ» i so 穹vo camp c *^ C=>c-»< VO C» c^» •^- cz> P- ge=><=> v〇og 0 1 oc^ Xinjiang tg Bu 9 m I Avoid — w» C-Ί G>w>w> S s so & r~~ o Γ~ g 宕ou·'» o w-» so 霊〇e^ OC d PQ ιϋΝ 戚 戚φ: chain m cocoon co Oi> Oo oo oo «t*j w-» c^ac»^ οβ 〇> oo &\ C^i oo CD 〇«» c^><=s 〇C*4 o <=> C3 Ca ci C~4 C>oc=> s «=> ssss > ON CO c=> i <=s C3 〇C3 JO C3 <T^ c=>c^ac=> 〇 Ac=> era Ci C=D CP c»^ s c><=>c^ae=><=> 〇CS <=> II a ca «^> c^a < ;〇 ΟΪ 〇5 r»4 5 v> o 〇J <=><^nc—- os c-'i oo w> o〇w CO v〇V» <r*4 o C-»io V » ο-ί ow* CO 5 o to 5 oo ca C3 CO cr-i CO er» oo e-v> oc^a 〇〇v〇OO v«〇o CS w> ci 宕90 PQ 〇ooo ON oo 〇 \ Os ooov#-» c^>e^>€->·* e=* P— C^lc=» googw» C*j <r» 〇r*~* (=> ggc= i <r-» e-> ci Wl c^i CD cn od r<-» o c> Art C=><-<» d CO e-»J 〇r<-» cs C' -J CM O CO C^ic=> to s cz> ^r <3> s <3> s C^> CO <=> s cs s c> CO oso SG» S s 〇cf ^ G>c*"isG> S c=? -^- c=> o inch c=» CU w-\ gc=> •^· oo C"—· c=> '-s* ' oo V» d oo CP ^gr o 〇cs v\ <g><=>w^>C=> Lan C=> c- o c><=> cS >^ c* dw «g C3 <=» sc=> s NO C"M order 04 CO W"*» oo c^a oo V* C^i >〇r*~ Vk rvi eo »rf~l ' «ϊΓ 〇a v-> 〇» VO on inch o. s <=>〇<-» €^) r〇Oi tz><r-^e〇> ΟΛ 宕v〇c=>c=> V» <=><=> C3 o C*-» OJ C*1 <*»ac·») r*~> CJ «**> C**J <-〇c*-t C-<J CO C_J苎«=> Ξ V» oo C3 沄oge=> oo <=> V» OS <=3 G & W» d 1 «=» o . 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Fees g § § § Fees g § gg § Builder § § § 1- I 53⁄4 P, 53⁄4 P, 9, 53⁄4 53⁄4 § p PP 9 RRRRR Dirty Dirty 1> 2 <s 0: 2 2 s 2 2 2 2 z ffi 52 cu O oo § o P: o S: PKVP10 (ffi) picypio P10P12 (ϊΐ2) PUVP12 Qing 4^93 ^jm (2nd 4th 4th Steel Lai 2nd Dimensional Marriage Festival I \mm\ 1笫2 solid 1 ^211 1 section solid 2笫mm] 2nd picture 2nd figure 2nd round 2nd round 4th 4th 4th 4th 4th sample area » a — cn ^r »r> v〇卜〇〇σ\ ο cs 33 201201947 (inch 璐雄)s« Μ Miscellaneous iS8 m saa 1® it lapse crack stop performance 丨 crack stop 1 丨 crack stop 1 1 stop 1 丨Crack stop 1 丨 crack stop 1 1 turn stop 1 1 crack stop 1 丨 crack stop 1 | crack stop | 1 crack stop 丨 | crack stop I 丨 crack does not stop I 1 crack does not stop | 1 crack does not stop I 1 does not stop 1 1 job does not stop I crack does not stop 1 crack does not stop I 1 face does not stop I | brew does not stop I! face does not stop I crack does not stop ι crack does not stop test load stress (N / mm2) | 262 1 | 262 i 1 262 1 1 300 1 1 300 1 1 300 [300 II 300 1 [300 | | 300 ; | 300 I | 262 1 1 262 I 1 262 1 262 1 1 262 I 1 262 1 1 262 I 262 I 1 262 I | 262 I 1 262 1 262 live m ^ > 11 ii i to 1 can be $ symbolic formula vTrsl+2〇-vTrs4 1 1 1 1 1 UJ ΙΛ eg ιο ιο 哔2哔一 file Ml 猩t ^ 1 1 1 1 1 1 1 1 1 1 LO T ΙΛ ιρ ΙΟ CO ΙΛ 1 fused heat (k J/ cm) 1 1 1 1 1 1 1 1 1 1 1 1 1 1 C0 ΙΛ CO 00 CO ii> CO Brake The joint condition of the joint and the vTrs3 symbol judgment formula vTrs!+2〇-vTrs3 〇ΙΟ U3 rH ο Ν N ο CNJ 10 2 LO 1〇LO 〇〇〇ο 〇Ο 〇〇1 § ss ss flP 111 〒 ο 1 0 1 LO 1 ιο fp Ln 1 of ο I 〇1 〇1 〇1 〇1 § 1 1 Another 1 1 Nest 1 〇Τ S 1 〇1 ο 1 s 1 o ιο Fusion access heat (kj/cm) ΙΛ Keep U5 inch寸 inch (D CO fD eo Φ to CSJ CSJ 呀 CVJ inch 00 CM in CO Ui CO ΙΛ CO ιο CO in CO in CO LO 1〇CO C0 CO η CO ¢0 CO CO sample number CM n inch CSJ in CsJ (0 CO 卜 cs ?3 a C0 rH w CO LO φ 00 05 Ο *Η 2 Stuffing 1 a 1 34 201201947 . [Evaluation results] Tables 2 to 5 of the present invention examples 15 and 21 to 31 are related to the second The first figure shown in the figure In the examples of the welded structure A of the embodiment, the inventive examples 16 to 18 are related to the welded structure B of the second embodiment shown in Fig. 4, and the inventive examples I9 and 2 are related to the fifth embodiment. An example of the welded structure 〇 of the third embodiment is shown. Further, Comparative Examples 1 to 8 shown in Tables 4 and 5 are examples having the same structure as the welded structure A shown in Fig. 2, and Comparative Examples 9 to 12 have the welded structure shown in Fig. 4 An example of the same structure of body B. In each of the above examples, the inventive examples 1 to 8, 12 to 16, 18 to 31, and the comparative examples 1 to 9 and 12, as shown in Fig. 2 or Fig. 4, are slightly quadrilaterally braked in plan view. The angle at which the member forms the steel plate fusion joint with respect to the outer edge portion becomes 90. An example of manufacturing a welded structure. Further, in the examples 9 to 11 and 17 of the present invention and the comparative examples 10 and U, the angle of the longitudinal direction of the steel plate fusion joint with respect to the outer edge portion is a predetermined angle shown in Table 2, and the plan view is slightly The square-shaped brake member is formed so as to be inclined with respect to the lateral edge portion. Examples of the above are the invention examples 9 to 11, 17 and the comparative examples 10 and 11 which are the transverse members of the brake member. The Ρ53 54 is also inclined, and the brake member is integrally formed as a trapezoid. Inventive Example 14 is an example in which a crack progresses from below, but another example is an example in which a crack progresses from above. Table 5, the spliced structure of the present invention (Inventive Examples 1 to 31): All brittle cracks can be stopped by the brake member (the form of the paste is borrowed from the molten structure of the month, even if the welded joint has Spastic schizophrenia 35 201201947 can be broadcasted 'can also inhibit crack propagation of ship joints or base materials, splicing structure fractures, confirmed that there are excellent (four) cracks transfer steel plate:: = = 1 case 12, 13 One is the case where the thickness of the brake member is larger than the thickness of the green tire (4), but the steel plate is welded to the hair; the trace reaches the brake member and the joint member m brake member, and the brake member can be used to exert the predetermined brittleness resistance. The crack propagation property can be used to achieve the predetermined brittle-resistant crack propagation property. Further, in the examples 4 and 15 of the present invention, the height H of the brake member is (1) the plate f "this day (four) lG, 11, 22, 23 - The surface is the brake member =, the base material of the plate (4) The thickness of the joint is small, but the same as above: the brittle crack that occurs in the plate-bonded joint is immediately broken by the brake member and the brake member stops cracking. Lower limit, but the secret of the table (four) moving components Brittleness - The transfer temperature VTYS2 value is higher on one side, so it propagates. In the welded structure of Comparative Examples 1 to 12, the characteristics or shape of the steel sheet of the brake member do not conform to the requirements of the present invention. The form of brittle crack propagation is the above [cJ or [d], as shown in Table 5, the propagation of brittleness cannot be stopped. The graft structure of Comparative Example b 5 is insufficient due to the height h of the brake member, and Comparative Example 2 is due to the brake member. The thickness t is not enough, the comparative example is afraid of the height η and the thickness t is not enough. 'After the brittle crack invades the simple joint and the brake structure, it will propagate to the welded joint of the steel plate again, and the brittle crack cannot be stopped, and it becomes [d 36 201201947 In addition, in the case of the vehicle master example 3, since the thickness t and the height of the brake member are insufficient and the Kea characteristic of the brake member is the same, the brittle crack can not be stopped by the brake member as in the above, and W is (4). Further, in Comparative Examples 6 and 9, since the lateral width W of the brake member is not appropriate, the brittle crack will be transmitted along the system, and thus propagated to the steel plate fusion joint, which becomes an example of [c]. Example 7 In the case of the brake member, the characteristics of the brake member are insufficient, and the above-mentioned same amount is used to stop the brittle crack in the brake member, which is an example of (4). In Comparative Example 8, since the Kca characteristic of the brake member is insufficient, the same as the above-mentioned disc cannot be used. The brake member stops the brittle crack and becomes an example of [d]. Each of the examples 10 and 11 is because the angle of the longitudinal direction of the steel joint with respect to the outer edge of the brake member exceeds the requirements of the present invention. Outside the scope, 'the cracks cannot be introduced into the component, and after bypassing the brake-bonded joint, 'this is the case - straight propagation to the welded joint of the steel plate, so the brittle crack cannot be stopped, and it becomes an example of [c].] The above results can be understood. The spliced structure of the present invention can suppress the cracked joint and prevent the breakage even if the joint has brittle cracks (4). TM 37 201201947 i: Simple description of the figure 3 1(a) to (d) A schematic view of the present invention is described. (a) shows a state in which a crack-resistant control portion composed of a brake member and a brake fusion joint is provided on a portion of a steel plate fusion joint formed by welding steel plates to each other, (b) (D) shows the progress of brittle cracks. Fig. 2 is a schematic view showing an example of the welded structure of the present invention, showing a state in which a portion of the steel plate welded joint is provided with a brake member and a brake welded joint, and the crack control portion is in a state. Fig. 3 is a schematic view for explaining a state in which the welded structure of the present invention is applied to a welded structure for a ship. Fig. 4 is a view similar to Fig. 2 for explaining another example of the welded structure of the present invention. Fig. 5 is a view similar to Fig. 2 for explaining another example of the welded structure of the present invention. 6(a) to 6(c) are diagrams for explaining a method of manufacturing a welded joint test body used in the embodiment of the present invention. The seventh (a) to (c) drawings are diagrams for explaining the tensile test method for evaluating the brittle-resistant crack propagation property in the examples of the present invention. 38 201201947 [Description of main components] A, B, C Fusion structure 70 Ship structure l, l〇, l〇A Steel plate 71 Aggregate 11, 12 Groove surface 72 Deck plate 2, 20, 20A steel plate fusion joint 73 Hull inner panel 21~24,31~34 small steel plate 74 hull outer panel 25,26,35,36 small steel plate fusion joint 81 window frame 3,3a,3b through hole 90 test device 4 crack resistance control part L weld line 5 Brake member A Welding structure 5a Intersection CR Brittle fracture 50 Outer edge portion d Width 51, 52 Upper edge portion (outer edge portion) Η Long southward degree 51a, 52a Rear end L Weld line 53, 54 Lateral edge W Width 55 lower edge Θ angle 6, 60 brake fusion joint 39